In order to suppress global warming, it is necessary reduce the weight of autobodies, whereas improvement collision safety automobiles required which results in a increase. Research and development high-strength steel sheets for autobodies are being carried out achieve both two objectives. Among various sheets, low alloy steels utilizing transformation-induced plasticity retained austenite (TRI...

In this work, a weld metal in K65 pipeline steel pipe has been processed through self-designed post-weld heat treatments including reheating and tempering associated with hot bending. The microstructures and the corresponding toughness and microhardness of the weld metal subjected to the post-weld heat treatments have been investigated. Results show that with the increase in reheating temperatu...

Due to a combination of advantages, high-performance steel components, especially for automotive manufacturing applications, are generally forged parts. In the forging industry, bainitic steels being increasingly used, because they can reduce processing chain and energy consumption. this case, microstructure be obtained immediately after forging, with controlled cooling, without any subsequent ...

Abstract This paper presents the microstructural changes and mechanical properties of carbide-free bainitic steel subjected to various heat treatment processes compares these results with similarly treated ferritic–pearlitic steel. A key feature investigated steel, which is common among others described in literature, that Si content developed was >1 wt.% avoid carbide precipitation retained...

There has been a great deal of work on the formation of hard white-etching regions in conventional bearing steels such as 1C-1.5Cr wt% when subjected repeatedly to rolling contact stresses. The regions are a consequence of localised mechanical attrition across microcrack faces and mixing, which refine the local structure and force cementite to dissolve. This white-etching matter is often associ...

A systematic approach to computer-aidedmaterials design has formulated a new class of ultratough, weldable secondary hardened plate steels combining new levels of strength and toughness while meeting processability requirements. A theoretical design concept integrated the mechanism of precipitated nickel-stabilized dispersed austenite for transformation toughening in an alloy strengthened by co...