Wyniki wyszukiwania - BazTech

1

The structural investigations of the bronze based CuMn12Al7Fe3Ni3

Smajdor M.

Marine Technology Transactions. Technika Morska

|

2008

|

Vol. 19

79-84

EN

The copper alloys are used in marine industry, because of their properties, such like erosion resistance, corrosion resistance, high corrosion-fatigue strength [2], [5], [6]. In generally, the properties of bronzes are higher than brasses [3]. The present work is aimed to summarize the structural investigation of the bronze BM12733, which is used in marine shipbuilding, mainly for the screw propellers. There are summarized tests concerning chemical composition, phase investigation, elements' map.

2

The analysis of the mechanical properties of welding joints of high-strength steels for offshore and ships structures

Bugłacki H., Kula M., Smajdor M.

Marine Technology Transactions. Technika Morska

|

2007

|

Vol. 18

31-41

EN

Correlation equations which was worked out during research and through multiple regression analysis may be helpful to determine the impact of alloy elements interaction, processing parameters and strengthening meters on end mechanical properties of HSS welded joints. By testing the equations with an independent experiment we managed to prove their sufficient accuracy in off-shore and ship structures design and construction. On the grounds of correlation equations analysis, we presented the general characteristics of alloy elements impact on mechanical properties of category A420-F690 thick plates welded joints.

3

AE Testing of Local Corrosion in Storage Tanks of Oil Tankers

Bugłacki H., Darski W., Malinowski S., Smajdor M.

Marine Technology Transactions. Technika Morska

|

2007

|

Vol. 18

43-50

EN

The research on problem of corrosion appearance and development and its impact on the condition and safety of oil tanker hulls was intensified after it was given a green light following the spectacular tanker disasters destroying fauna and flora in the inshore waters alongside the coast of significant length. The European Union supported the scientific research aiming at diminishing the risk of sea disasters out of concem for environmental protection and oil tanker safety. The crude oil tankers were identified as potentially the most dangerous. Acoustic Emission (AE), a modem, non-invasion technology of assessing the hull's condition may be employed to watch over the processes and activity of corrosion effects within the shell plating of tankers (the bottom and the sides). AE techniques used onshore (e.g. assessment of onshore crude oil storage tanks) were to be transferred to offshore conditions. The successful implementation will mean a significant progress in crude oil maritime transport safety.

4

Modelling of mechanical properties of copper alloys sand cast ship propellers

Bugłacki H., Smajdor M.

Marine Technology Transactions. Technika Morska

|

2004

|

Vol. 15

235-241

EN

The mechanical properties (Rm, A5) tests of copper alloys used for screw propellers, in dependence on their chemical composition and sand cast thickness, let to assess the regression equations. The practical application of these equations is to prognosis of tensile strength (Rm) and elongation (A5). The calculations of Rm and A5 for selected sand cast copper alloys (brass MM55,bronzes: BA93, BA2, CMA1) showed, that the elaborated models of regression equations represent the real mechanical properties of these alloys very well.

PL

Badania właściwości mechanicznych (Rm, A5) stopów miedzi, stosowanych na pędniki okrętowe, w zależności od ich składu chemicznego i grubości odlewów piaskowych pozwalają na wyznaczenie równań regresji mających zastosowanie do prognozowania wytrzymałości statycznej na rozciąganie (Rm) i wydłużenia plastycznego (A5). Obliczenia wartości Rm i A5 dla wybranych odlewów piaskowych Imosiądz MM55, brązy BA93, BA2 i CMA1) wykazały, że opracowane modele równań regresji dobrze reprezentują rzeczywiste właściwości mechaniczne piaskowych odlewów pędników okrętowych.

5

Influence of deformation velocity on mechanical properties of high strength structural steels

Bugłacki H., Smajdor M.

Marine Technology Transactions. Technika Morska

|

2004

|

Vol. 15

213-222

EN

The results of investigations of mechanical properties with high deformation velocity for a representative group of high steels for welded ships structures are presented in this report. The investigations were carried out in the Navy Academy and the Technical University of Gdańsk within the research work on the elaboration of high strength steel characteristics for Polish shipbuilding for many years. The results obtained in investigations were used to form a fragment of the expert program "HSLA-QT" partly concerning the influence of deformation velocity on the mechanical properties. The proposed correlation formula may be helpful to evaluate the influence of the deformation velocity on mechanical properties.

6

The correlation between impact energy and the meters of hardening of extra high strength steels for ship and offshore welded structures

Bugłacki H., Smajdor M.

Inżynieria Materiałowa

|

2004

|

R. XXV, nr 3

129-132

EN

The present publication proves the thesis that is possible to estimate in a precise enough way for the needs of the design and construction of ships and offshore structures, the quantitative relationships of acceptance both the impact energy and microstructure of the thick steel plates of 420-690 category. The obtained during the investigations relationships between the meters of hardening (hardening by cementite, solution hardening, precipitation hardening, hardening by grain of ferrite) together with the mechanical properties of acceptance (KV^0, KV^-20, KV^-40, KV ^-60) allow us to determine the metallurgical means (chemical composition, cooling rate v(c), temperature of tempering t(t), temperature of austenitizing t(a)) to meet the requirements of acceptance for extra high strength steels (EHSS). Considering the importance of the essential factors of the prepared correlation formula it was possible to determine the influence of both the alloy elements, parameters of processing and meters of hardening on the final impact energy of the EHSS. Validating the prepared formulae by the independent experiments has shown that the formulae presented in the publication guarantee a required level of accuracy for both the design and construction of ships and offshore structures.

PL

Udowodniono tezę, że można wyznaczyć wystarczająco dokładne dla praktyki projektowania i budowy konstrukcji okrętowych i oceanotechnicznych związki ilościowe odbiorczych właściwości mechanicznych i mikrostruktury blach grubych kategorii 420 ÷ 690 oraz ich złączy spawanych. Uzyskane w pracy związki mierników umocnienia (cementytem, roztworowe, wydzieleniowe, wymiarem ziarna ferrytu) z odbiorczymi właściwościami mechanicznymi (R(m), R(e), A(5), Z, KV^0, KV^-20, KV^-40, KV^-60) pozwalają na określenie środków metalurgicznych (skład chemiczny, v(ch), t(o), t(h)) umożliwiających osiągnięcie wymagań odbiorczych stali wysokiej wytrzymałości. Dla współcześnie produkowanych stali wysokiej wytrzymałości zostało zaproponowane równanie do wstępnej oceny ich spawalności (C(e31)) oraz równania korelacyjne do obliczania maksymalnej twardości materiału SWC (HVmax). Na podstawie analizy opracowanych równań korelacyjnych przedstawiono uogólnione charakterystyki wpływu pierwiastków stopowych na właściwości mechaniczne blach grubych kategorii 420 ÷ 690 oraz ich złączy spawanych na konstrukcje okrętowe i oceanotechniczne.

7

Wpływ technologii przetwarzania na właściwości użytkowe stali trudnościeralnych typu HARDOX

Bugłacki H., Smajdor M.

Inżynieria Materiałowa

|

2003

|

R. XXIV, nr 6

257-259

PL

W referacie przedstawione zostaną zagadnienia dotyczące technologii przetwarzania stali HARDOX, jak również zalecenia odnośnie spawania złączy stali HARDOX w zależności od grubości materiału, miejsca spawania, rodzaju spawania, rodzaju złącza, materiałów spoiwa. Przedstawione zostaną wyniki badań właściwości mechanicznych, rozkładów twardości doczołowych i teowych złączy spawanych. Osobnym punktem są zalecenia dotyczące obróbki skrawaniem stali HARDOX 400 w porównaniu do stali WELDOX 500 i WELDOX 700.

EN

The problems of HARDOX processing technology are presented in the paper. Also is presented the recommendation connected with welding of HARDOX joints in the dependence of material thickness, the welding location, welding type, joints type and added metal type. The results of mechanical properties tests, hardness decomposition of butt joints and tee ones, are presented also. The requirements of machining of HARDOX 400 in comparison to WELDOX 500 and WELDOX 700 are the last point of the paper.

8

Mechanical properties of abrasion-resistant HARDOX 400 steel and their welded joints

Bugłacki H., Smajdor M.

Advances in Materials Science

|

2003

|

Vol. 3, nr 2(4)

5--8

EN

The mechanical properties of parent material and welded joints of abrasion-resistant HARDOX steel has been discussed in the paper. The results of mechanical properties and technological bending tests have been presented. The possibility of predicting the mechanical properties of HARDOX steel on the base of regression analysis was also considered.