Wyniki wyszukiwania - BazTech

1

Welding of 1.4462 duplex steel used in means of road transport

Szczucka-Lasota Bożena, Węgrzyn Tomasz

Zeszyty Naukowe. Transport / Politechnika Śląska

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2024

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z. 122

281--292

EN

Materials with good mechanical and chemical properties (materials should be resistant to various types of corrosion) are proposed for the various structures of means of transport. For this reason, high-alloy steels, including duplex steels, are increasingly used in the automotive industry. The 1.4462 duplex steel used in means of road transport steel could be treated as an interesting high-strength stainless material used in the automotive industry. Generally, duplex steels have a high resistance to localized and uniform corrosion. The duplex and superduplex steels are assumed to be rather proper weldable materials; however, cracks could be observed both in the heat-affected zone (HAZ) and in the weld. The article analyses the influence of tubular cored metal arc (136) with active gas shield welding (process 136) parameters on the arrangement of correct joints used in tanker truck elements, as an example of welding in the automotive sector. Various mechanical tests checking the properties of joints were realized. The goal of the paper is to choose the correct welding parameters for elements of 1.4462 steel. The construction elements of a tanker truck are made by the 136 method of welding.

2

Monitoring fuel quality in the transport industry

Szczucka-Lasota Bożena, Węgrzyn Tomasz, Jurek Adam, Kalwas Jerzy

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2024

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z. 191

541--549

EN

Purpose: The aim of the article is to check whether there are indications that light waves can be used to monitor fuel quality. Design/methodology/approach: Tests of deposits released in fuels during long-term storage were carried out. The research involved observing with the unaided eye illuminated samples of fuels stored in glass vials. The research was qualitative in nature. Samples of diesel oil, gasoline were tested. The phenomena occurring in materials under the influence of aging processes were determined and the relationships between the tested material, its quality and the impact of light rays on the sample were explained using physic-chemical phenomena. Findings: The novelty of the article is to show that fuels after the storage process can significantly differ in quality from the starting material and that it is possible to monitor fuel quality using spectroscopic methods. Research limitations/implications: The research conducted is qualitative and not quantitative. Practical implications: It is suggested to use methods of continuous monitoring of stored fuels using light spectroscopy methods. Originality/value: It is to show that fuels from one manufacturer and stored in the same tank age at different times. Fuels have different properties and significantly differ in quality compared to the input material. Therefore, there is a real need for continuous monitoring of fuel quality.

3

Węgrzyn Tomasz, Szczucka-Lasota Bożena, Krzysztoforski Michał, Śliwiński Tomasz

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2024

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z. 195

593--600

EN

Purpose: Main novelty and the aim of the paper is to analyses possibility of dissimilar AG welding of two various grades of steel with significantly different structure. Design/methodology/approach: Two various metals have been checked in welding in order to obtain a high-quality joint of car body elements. The properties of the joint were checked by NDT (Non Destructive Test) and DT (Destructive Tests). Findings: Relations between MAG welding process parameters and the quality of joint. Research limitations/implications: In the future, it can be tested the effect of micro addition of nitrogen or oxygen in gas shielding mixtures of the MAG process. Practical implications: Suggested materials and innovation will not cause problems in the production process provided that the technological regime will be respected. Social implications: Modifying the welding materials and method will not affect the environment and production management methods. Producing of dissimilar welds must translate into production savings. Originality/value: The paper is addressed to manufacturers of low-alloy and advanced high strenth steel for automotive industry.

4

DOCOL 1100M welding in the construction of electric means of transport

Szczucka-Lasota Bożena, Gołombek Klaudiusz, Węgrzyn Tomasz, Łazarz Bogusław, Lukaszkowicz Krzysztof, Pereira Silva Abilio, Antczak-Jarząbska Romana

Transport Problems

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2024

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T. 19, z. 2

219--228

EN

Advanced high-strength steels are important for the automotive sector. Metal active gas (MAG) is the most popular method for joining grades of steel. The goal of the paper is to analyze the mechanical properties of the MAG welding joint made of high-strength DOCOL 1100M intended for the construction of electric vehicles. The manuscript shows a basic understanding of the properties of DOCOL joints. This type of material is characterized by a martensitic microstructure, which makes it difficult to make a proper joint. The tensile strength, metallographic structure, and type of non-metallic inclusions were analyzed as a function of the oxygen amount in the protective gas mixture. Investigations of oxide non-metallic inclusions were carried out using scanning electron microscopy. This article attempts to obtain high joint strength of the electric vehicle structure by controlling the average size of non-metallic inclusions in the weld, which is influenced by shielding gas in the MAG welding process. The solution has application potential for the automotive industry, especially for electric vehicles.

5

A micro-cooled high-strength weld for heavy transport means

Węgrzyn Tomasz, Szczucka-Lasota Bożena, Szymczak Tadeusz, Łazarz Bogusław, Piwnik Jan

Transport Problems

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2024

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T. 19, z. 1

83--96

EN

This paper focuses on the technical problem of repairing the main operating elements of heavy vehicles (semitrailers, dumps, and drums). If these vehicles are in service, significant changes in work schedules can occur, and costs can be generated immediately. Therefore, using the correct technology for repairs is crucial to minimizing financial and logistic difficulties. The article aims to analyze the mechanical properties of an MMA (Manual Metal Arc) welding (covered electrodes) joint made of Hardox 450 steel. This kind of material has a martensitic microstructure, which is difficult to weld because of changes in the components to the other ones during the joint process. Other inconveniences are related to the different chemical composition of steel and covered electrodes, their mechanical resistance, and thermodynamic conditions (consisting of the pre-heating temperature and the cross-pass temperature). Therefore, the joint quality should be determined using a few methods. In this case, NDT (magnetic and radiographic tests) and DT (microstructural analysis and static as well as fatigue tests) were used. All obtained results have enabled the proposed guides for the MMA welding of the steel grade. This is indicated as follows: (1) the method of bevelling the sheets before welding should be used, (2) pre-heating is necessary at temperature levels of 100 C and 125 C, and (3) the recommended interstitial temperature is between 170 C and 200°C.

6

Application of Fe3Al intermetallic phase filler metal in valve seating face hard facing

Szczucka-Lasota Bożena, Węgrzyn Tomasz, Cybulko Piotr

Zeszyty Naukowe. Transport / Politechnika Śląska

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2023

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z. 119

257--265

EN

The exhaust valve seat face is a surface that degrades slowly as a result of mechanical and thermal stresses. There is extensive research on new materials for valves and for the improvement of valve production technology. This paper discusses the method of obtaining a filler metal made of Fe3Al intermetallic phase and the method of TIG hard-facing on a valve seating face made of H9S2 steel, evaluating the effects of essential hard-facing parameters. The resulting hard-facing build up was assessed in terms of quality using industrial radiography testing (RT).

7

Abrasive wear resistance of Fe3Al and Satellite 6 coatings for the protection of valve seats surfaces

Szczucka-Lasota Bożena, Tarasiuk Wojciech, Cybulko Piotr, Węgrzyn Tomasz

Zeszyty Naukowe. Transport / Politechnika Śląska

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2023

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z. 118

219--228

EN

The development of a technology that increases the service life of valve seats in CNG/LNG-powered vehicles requires the appropriate selection of material and the technology of its application. Commercially used valve seat materials show accelerated wear under operating conditions, especially in natural gas vehicle engines. The authors developed a new material concept and a new technological concept for the protection of the valve seat in CNG/LNG-powered vehicles. This article aims to present the first stage of tribological research. Two materials were used in the research: Stellite 6 alloy and Fe3Al intermetal. A commonly used material for valve seats of combustion engines is Stellite 6. The Fe3Al is the new proposed material coating for the protection of the valve seats of internal combustion engines. This article compares the abrasive wear resistance of these materials. The abrasion tests were performed on a T-11 pin-on-disc tester, and the counter-sample was steel S235JR. The test conditions were similar to those prevailing during the operation of the valves in the head of the internal combustion engine, without the influence of temperature. The obtained results indicate that the Fe3Al intermetal is characterized by a lower coefficient of friction and lower wear intensity than Stellite 6. The results confirm that the Fe3Al phase is a prospective material to be used as a protective material on the valve seat of vehicles.

8

Impact analysis of micro-jet cooling for stress concentration in a crane bumper during a collision

Haniszewski Tomasz, Węgrzyn Tomasz, Szczucka-Lasota Bożena

Transport Problems

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2023

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T. 18, z. 2

97--110

EN

In the structure of crane bumpers, there is a need to join various types of steel. Usually, low-alloy steel structures are used for this purpose, which can be represented by S355J2 steel. The tensile strength of S355J2 low-alloy steel is slightly below 600 MPa, and the tensile strength of S355J2 steel is at the high level of 200 J at ambient temperature. The impact strength of this steel in negative temperatures is also good at over 47 J at -60 °C, so it meets the 6th class of impact toughness. Welding structures, after classic gas metal arc welding (GMAW) processes, meet only the second impact toughness class. An improved GMAW process was used by micro-jet cooling application to raise the mechanical properties of the joints. The microstructure and main properties of the joints were carefully analyzed. The influence of using the new suggested welding process on the various properties of the welds is presented (UTS - ultimate tensile strength, YS - yield strength, Poisson ratio, elongation, Young’s modulus). Then, the effects of tests for use in crane bumper construction were checked by using a hybrid finite element method (FEM) analysis.

9

Modern materials and innovative welding technology used in the construction of antenna mounts

Szczucka-Lasota Bożena, Węgrzyn Tomasz

Zeszyty Naukowe. Transport / Politechnika Śląska

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2022

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z. 115

175--182

EN

Telecommunication, transport and civil engineering play an important role in new research areas. New antennas based on innovative materials are being developed. At the same time, the methods of antenna mounting with the use of high-strength materials to ensure high structural rigidity with the lowest possible weight are being planned. These materials include AHSS steels with ultimate tensile strength (UTS) up to 1700 MPa and elevated yield point (YS); however, welded joints made of these steels have much worse mechanical properties, compared to the native materials. In this paper, it was planned to test the MAG welding of DOCOL 1400M steel (AHSS group). Directly after welding, a micro-jet joint cooling was applied. It was determined to create thin-walled joints that could be used in the formation of antenna mounts.

10

MIG welding of austenitic 316L steel used in means of transport

Szczucka-Lasota Bożena, Węgrzyn Tomasz

Zeszyty Naukowe. Transport / Politechnika Śląska

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2022

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z. 116

247--256

EN

The austenitic 316L steel (1.4401) is an important stainless material used to build various means of transport. Austenitic steel has high resistance to atmospheric corrosion. The austenitic steel is treated as a good weldable material, although cracks are possible. This paper analyses the influence of various MIG welding parameters on the creation of correct joints used in the stainless steel structures of mobile platforms elements, as an example of welding structures, in various means of transport. Various tests verifying the mechanical properties of MIG welds, including non-destructive tests, tensile strength and hardness tests, were carried out. This article aims to show how important and complex the task is to select the correct welding parameters for elements of means of transport made of austenitic steel on the example of elements of mobile platforms.

11

Welding of 690 QL steel for the construction of vehicles and antenna elements

Węgrzyn Tomasz, Szczucka-Lasota Bożena, Döring Adam

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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z. 160

631--638

EN

Purpose: The novelty and the aim of the article is to check the possibility of welding high 9 strength steels with a mixture containing 7000 ppm of nitrogen. Design/methodology/approach: A new welding material and method have been developed in order to obtain a high-quality joint for automotive industry and for antenna holders and towers. The properties of the joint were checked by NDT (Non Destructive test) tests and the strength and fatigue were tested. Findings: Relations between process parameters and the quality of welds. Research limitations/implications: In the future, it can be suggested to investigate the effect of micro addition of nitrogen in gaseous shielding mixtures of the MIG/MAG welding process. Practical implications: The proposed innovation will not cause problems in the production process. Only the innovate shielding gas with micro additives will be modified without affecting the technological process, management and economic aspects. Social implications: Modifying the welding method will not affect the environment and production management methods. Originality/value: It is to propose a new solution with its scientific justification. The article is addressed to manufacturers of high-strength steel for automotive industry and to manufacturers of antenna components and instrumentation.

12

New concept of gas mixtures for welding high-strength steel S960 MC

Węgrzyn Tomasz, Szczucka-Lasota Bożena, Kurowska-Wilczyńska Kinga, Doring Adam

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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z. 157

623--629

EN

Purpose: Checking the quality of a joint made with a newly developed method. Design/methodology/approach: A new welding method has been developed in order to obtain a high-quality joint. The properties of the joint were checked by NDT (Non Destructive test) tests and the strength and fatigue strength were tested. Findings: Now, adding to the shielding gas mixture can improve the quality and properties of the weld. Research limitations/implications: In the future, it can be suggested to investigate the effect of nitrogen in other gaseous shielding mixtures of the MAG welding process. Practical implications: The proposed innovation will not cause problems in the production process. Only the shielding gas will be modified without affecting the technological process, management and economic aspects. Social implications: Modifying the welding method will not affect the environment and production management methods. Originality/value: What is new is to propose a new solution with its scientific justification. The article is addressed to manufacturers of structures made of HSS and AHSS steels.

13

Initial assessment of the quality of road surfaces

Szczucka-Lasota Bożena, Waligóra Kamil, Węgrzyn Tomasz, Wszołek Łukasz

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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z. 157

571--578

EN

Purpose: The aim of the article is to check the quality of the road and classify the selected road on a four-level scale. Design/methodology/approach: The paper outlines the impact of comprehensive road surface quality management on the safety of vehicles and road users. The basic types of road damage were presented, as well as preliminary diagnostics of a randomly selected national road was carried out. Visual tests were carried out to determine: the type and geometry of the pavement damage, the number of damage, the area covered by the damage. In the article the damage indicators were calculated. The results allowed for the assessment of the quality of the tested pavement and its classification on a four-point scale. Findings: The quality of the road surface was assessed and classified as level C. Research limitations/implications: In the future, it can be suggested to change the methodology of investigate the road. It is proposal to using drone with the application. Practical implications: The research indicates the need to plan the renovation of the road surface and suggests changing the surface material from construction asphalt to the new modified asphalt. Originality/value: The article indicates the need to amend the documents and the current methodology of the procedure.

14

Influence of selected parameters on the quality of technical tests braking system

Szczucka-Lasota Bożena, Węgrzyn Tomasz, Kazanowski Maciej, Wszołek Łukasz

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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z. 158

589--598

EN

Purpose: The aim of the study is to find out whether and to extent the change of selected parameters of the system, such as the type of tires, tire pressure and axle load, changes the result of the technical test of the analysed vehicle in the field of measuring braking forces. Design/methodology/approach: Diagnostic tests, tire pressure measurements, axle load measurements, braking force measurements on a roller device were carried out. Findings: The relationships between the pressure in the tires and the braking force measured on the wheel as well as between the braking force and the load acting on the vehicle axle have been demonstrated. Research limitations/implications: Mathematical relationships between tire pressure and vehicle braking force can be derived in the future. Practical implications: In the course of the tests, it was found that the technical tests made it possible to determine the braking forces only while maintaining the nominal ±1×105 Pa tire pressure. Changes to this parameter may influence the measurement results. Moreover, the influence of tire pressure on the change of the measured braking force values was found, which translates into the safety of the vehicle in road traffic. Originality/value: approach to brake system.

15

Elimination of inconsistencies in the process of expanding the fleet of electric buses

Szczucka-Lasota Bożena, Węgrzyn Tomasz, Kowal Maciej, Cybulko Piotr

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2022

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z. 158

599--606

EN

Purpose: The aim of the work is to present selected research results of the first stage of work, the so-called pre-design research related to the implementation of electric vehicles into the company's fleet. Design/methodology/approach: the article presents inconsistencies and problems related to the use of electric buses as well as problems related to point infrastructure. The results of the research were obtained from the observations of the analyzed transport processes, the process of fleet management, from interviews with employees, as well as from the analysis of documentation and comparison of records with the actual state. Findings: The results confirm that the effective elimination of nonconformities leads to the improvement of the process quality and the reduction of costs related to vehicle breakdowns. Research limitations/implications: The research indicates the need for continuous improvement of the process of using electric vehicles. Validation studies have confirmed that it is impossible to eliminate all problems, therefore the process should be constantly improved. Originality/value. The article indicates the need to amend the subsequent projects and the current methodology of the procedure.

16

Konduktancja połączeń spawanych torów prądowych szynoprzewodów aluminiowych

Cybulko Piotr, Węgrzyn Tomasz, Szczucka-Lasota Bożena, Krzysztoforski Michał, Döring Adam

Wiadomości Elektrotechniczne

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2022

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R. 90, nr 9

28--30

PL

Systemy dystrybucji energii elektrycznej oparte na szynoprzewodach znajdują zastosowanie m.in. w obiektach przemysłowych wykorzystujących instalacje elektryczne o różnych mocach. Wymagania dotyczące zasilania są realizowane przy użyciu różnych grup szynoprzewodów. Rodzaj używanych połączeń toru prądowego w szynoprzewodach wpływa na przewodność elektryczną połączeń i określa warunki, w jakich można korzystać z szynoprzewodów. W tym artykule przedstawiono wpływ typu procesu spawania złączy w szynoprzewodach aluminiowych pod kątem ich przewodności elektrycznej.

EN

Electricity distribution systems based on busducts are used, among others, in industrial facilities using electrical installations with different capacities. The power requirements are realised by using different groups of busducts. The type of current path connections used in busducts influences the electrical conductivity of the connections and determines the conditions under which busduckts can be used. In this paper, the influence of the type of welding process for joints in aluminium busducts on their electrical conductivity is analysed.

17

Plasticity properties of advanced high-strength steel weld construction of transport means - simulation by the MESH-free method

Szczucka-Lasota Bożena, Uściłowska Anita, Węgrzyn Tomasz, Łazarz Bogusław

Transport Problems

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2022

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T. 17, z. 3

39--50

EN

Advanced high-strength steel (AHSS) is being used increasingly often in the structure of means of transport. Welds made of these steels can crack in the heat-affected zone (HAZ) and have inferior mechanical properties compared to the base material. The goal of this paper was to solve the technological and material problem of obtaining highstrengh thin-walled welded structures of AHSS steel designed for heavily loaded elements of transport means. The novelty of the article is its presentation of a modified welding process which enables a high-strength structure of the obtained joint to be obtained without welding defects and incompatibilities. Copper backing was selected as an effective method of heat dissipation in the process, and, using the basic solutions method, the leverage of a heat flow process in the weld method deposit (WMD) was checked after cooling down the substrate. The fundamental solutions method was used to determine the optimal shape of the backing. It has been shown that the new backing affects the structure and mechanical properties of welds. In order to verify the newly developed method, tensile tests of the obtained joint were carried out, the hardness was assessed, the metallographic structure was analyzed, and non-destructive tests were performed. The developed material and technological solution were used, for example, for the construction of the arm element of the mobile platform.

18

Improvement of the mechanical properties of mobile platform stainless construction elements

Szczucka-Lasota Bożena, Węgrzyn Tomasz

Transport Problems

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2022

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T. 17, z. 4

91--102

EN

Stainless steel could be treated as the main material used to construct various means of transport, including mobile platforms and tank trucks. An austenitic steel known as 316L steel (1.4401) has high resistance to atmospheric corrosion, natural waters, water vapor, alkaline solutions, and acids, even at elevated temperatures. This steel is weldable, although it is also prone to various types of welding cracks. Many factors influence the quality and mechanical properties of a joint. The most significant of these is the appropriate selection of welding parameters, which should be determined precisely and separately for each type of sheet, depending on its thickness and geometric features. The aim of the present article is to study the influence of main TIG (Tungsten inert gas) welding parameters on the creation of proper joints used in the construction of mobile truck platforms or tank trucks. The proper selection of parameters enables the production of welds with good functional properties. A novelty of this article is the proposal to weld each layer of a thick joint with different parameters, which has an important influence on the mechanical properties of the joint. It is expected that the new material and technological solution will yield a joint with good corrosion resistance and increased mechanical properties. This is important in the responsible construction of means of transport, using the example of mobile platforms and tank trucks. Different tests verifying the properties of joints, including non-destructive testing, tensile strength tests, and fatigue tests, as well as a hardness probe, were applied.

19

Provisional eco-city - ekologiczne tymczasowe miasteczko kontenerowe na czasy klęsk humanitarnych

Ujma-Wąsowicz Katarzyna, Walentyński Ryszard, Węgrzyn Tomasz, Szczucka-Lasota Bożena, Bartosik Wiktoria, Jurkiewicz Anna, Lipińska Olga, Popielarczyk Adrianna, Swoboda Jakub, Wrona Krystian

Builder

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2022

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R.26, nr 7

44--48

PL

Klęski humanitarne to nieodłączny element życia na Ziemi. Z powodu różnych katastrof, naturalnych i powodowanych przez człowieka, w których budynki ulegają zniszczeniu, mieszkańcy terenów zurbanizowanych zmuszeni są niejednokrotnie do zamieszkiwania w odległych od swych dotychczasowych domostw miejscach. Ideą projektu było przeprowadzenie prac badawczo-projektowych mających na celu opracowanie kontenera nowej generacji, który mógłby być multiplikowany w sposób wertykalny, przybierać różne funkcje, być budowany i rozbierany przez samych użytkowników, składać się w pewnych swych częściach z materiałów biodegradowalnych, w innych na tyle lekkich i wytrzymałych, by wykorzystać je wielokrotnie (zgodnie z ideą gospodarki obiegu zamkniętego - gospodarki cyrkularnej).

EN

Humanitarian disasters are an integral part of life on Earth. Due to various disasters, natural and man-made, in which buildings are destroyed, residents of urban areas are often forced to live in locations far away from their existing homes. The intention of the authors was to conduct research and design work to develop a new generation container, that could be multiplied in a vertical way, take on different functions, be built and taken apart by its users, be composed of biodegradable materials in some parts, and in other parts be light and durable enough to be reused many times (in accordance with the idea of circular economy).

20

Welding of thin-walled mobile platform structures made of steel DOCOL 1400M

Węgrzyn Tomasz, Szczucka-Lasota Bożena

Biuletyn Instytutu Spawalnictwa w Gliwicach

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2022

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Vol. 66, No. 4

21--26

EN

Because of their high immediate tensile strength and significant fatigue strength, DOCOL steels (belonging to advanced high-strength steels (AHSS)) are increasingly commonly used in the fabrication of mobile platforms. The welding of the above-named steels is difficult due to the fact that the dominant structure is martensitic. As a result, the welding of such steels requires both experience and high qualifications. The tests discussed in the article aimed to identify appropriate welding parameters as well as to determine the effect of such process parameters as welding rate, the method of bevelling and the application of preheating on the quality of the joints obtained in the process.

PL

W budowie podestów ruchomych coraz częściej wykorzystuje się stale DOCOL z grupy AHSS (AHSS – Advanced High-Strength Steel) z uwagi na ich wysoką doraźną wytrzymałość na rozciąganie i znaczną wytrzymałość zmęczeniową. Spawanie tych stali jest utrudnione, ze względu na dominującą strukturę martenzytyczną. Podczas spawania tych stali znaczną rolę odgrywa doświadczenie i kwalifikacje spawacza. Cele artykułu to dobór właściwych parametrów spawania stali DOCOL 1400M i ocena wpływu wybranych parametrów procesu, takich jak: prędkość spawania, sposób ukosowania i podgrzewanie wstępne na poprawność wykonanego złącza.