Abstract Short-term heat treatments of steels are used for tools and cutlery but also the surface treatment a variety other workpieces. If corrosion resistance is required, martensitic stainless like AISI 420L or 420MoV typically used. The influence short-term on different metastable states steel was examined reported in this article. Starting from defined microstructural state, investigated ex...

The production of machine parts usually ends with some kind of a heat treatment. A proper heat treatment, like quenching, provides increased surface hardness, which improves wear resistance. The quenching process must be fast to achieve the required hardness, but not too fast to prevent surface damage. Monitoring of the quenching process in real time, and an appropriate control can improve the ...

This study focused on the effects of different peak (austenitizing) temperatures (Tp) over martensite start temperature (Ms) and its influence final residual stresses after welding simulation. For this purpose, expansion coefficients obtained through physical (dilatometric) simulations a high-strength low-alloy steel were considered for three temperatures: 1300 °C, 1150 920 °C cooling rate 25 °...

In this report T-T-T diagram and CCT-Curve from austenitizing temperature 1200•Ž were researched and then effects of preheat temperatures and welding thermal cycle on properties of heat affected zone were clarified to investigate weldagility of 21/4 Cr-1Mo steel and also we carried out a restraind crack test to investigate crack sensitivity of the steel. The results of experiments are summarize...

This work deals with the feasibility of obtaining Austempered Ductile Iron with Dual Phase structures (DPADI) through heat treatment, starting from different as-cast microstructures. The mechanical properties on these microstructures were evaluated. DPADI microstructures were obtained by adding different tenors of silicon (2.4% to 4.2%) to the melts and keeping the other alloying elements const...

The Finite-Element-Analysis (FEA) is of major importance for the design and improvement of forging processes. In this field, FEA is traditionally used to predict die fill, residual stresses and forming forces. The intention of the work presented in this paper is the development of an advanced simulation model for the description of phase transformation processes in forging dies based on FEA. Th...