Wyniki wyszukiwania - BazTech

1

Impact Toughness of Steel WMD after TIG Welding

Węgrzyn T., Piwnik J., Stanik Z., Węgrzyn D., Sieteski D.

Archives of Metallurgy and Materials

|

2017

|

Vol. 62, iss. 3

1647--1650

EN

The material selected for this investigation was low alloy weld metal deposit after TIG welding with various amount of oxygen in weld metal deposit (WMD). After TIG process it is difficult to get proper amount of oxygen in WMD on the level much lower than 350 ppm. The highest impact toughness of low alloy WMD corresponds with the amount of oxygen in WMD above 350 ppm. In the paper focuses on low alloy steel after innovate welding method with micro-jet cooling that could be treated as a chance on rising amount of oxygen in weld. Weld metal deposit (WMD) was carried out for TIG welding with micro-jet cooling with various amount of oxygen in WMD. In that paper various gas mixtures (gas mixtures Ar-O2 and Ar-CO2) were tested for micro-jet cooling after TIG welding. An important role in the interpretation of the results can give methods of artificial intelligence.

2

Compressive Strength of Steel Frames after Welding with Micro-Jet Cooling

Hadryś D., Węgrzyn T., Piwnik J., Wszołek Ł., Węgrzyn D.

Archives of Metallurgy and Materials

|

2016

|

Vol. 61, iss. 1

123--126

EN

Low carbon steel weld structures generally exhibit a very linear stress-strain relationship. In the study of strength of materials, the compressive strength is the capacity of a material or structure to withstand loads tending to reduce size of structure. It is mainly measured by plotting applied force against deformation in a testing machine. Compressive strength is a main key value for design of welded structures.The main goal of that paper was analysing of plastic properties of frame welds which were made with various parameters of micro-jet cooling. New technology of micro-jet welding could be regarded as a new way to improve plastic properties of welds. It allows to obtain welds with better mechanical properties in comparison to ordinary welding method. Furthermore it is possible to steering of weld structure and properties of the weld. There were given main information about influence of various micro-jet gases on metallographic and properties of structure steel welds.

3

Wpływ prędkości głowicy w procesie hartowania laserowego na właściwości tribologiczne warstwy wierzchniej

Tarasiuk W., Węgrzyn D.

Tribologia

|

2015

|

nr 4

177--185

PL

W pracy przedstawiono wyniki badań eksperymentalnych wpływu prędkości głowicy na właściwości tribologiczne stali 16MnCr5 w procesie hartowania laserowego. Badania tarciowe przeprowadzono na testerze typu trzpień-tarcza T-11, a przeciwpróbkę stanowiła tarcza silikatowa. Parametrem wyznaczającym jakość uzyskanej warstwy była intensywność zużycia. Moc wiązki lasera w każdym z badanych przypadków była identyczna, a prędkość głowicy laserowej zmieniała się w zakresie od 10 do 40 mm/s. Analiza uzyskanych wyników dostarczyła nam informacji na temat jakości warstwy wierzchniej w zależności od prędkości głowicy hartującej. Stal 16MnCr5 hartowana laserowo odznacza się niską intensywnością zużycia przy prędkościach głowicy nieprzekraczającej 30 mm/s.

EN

The paper presents the results of research on the tribological properties of steel 16MnCr5 after laser hardening. The quality of the hardened surface was influenced by laser head speed. The study was conducted on friction tester pin-on-disc type T- 11, and a counter sample disc was silicate. The intensity of wear determined the quality of the surface layer. Based on the results, we obtained information about the laser head speed to temper steel 16MnCr5 to maintain a high resistance to wear.