Microstructure Refinement by Austenizing and Tempering in Low Alloy Carbon Steel Casting

Requirements for high service life and mechanical strength of components undergoing cyclic deformation and abrasive resistant, identification of quantitative relationships between material properties and its microstructure very important. In the previous study, Hardness and toughness properties are usually obtained by combining quenching and tempering. The other studies, to increase the hardness by adding Cr on the material. The application of heat treatment in austenizing can provide a microstructure change with refining carbides. In this study, 2.085Cr 2.418Ni low carbon steel casting were heat treated with a reheated in various temperature without quenching. The changes in the microstructure in the last step after passing through the temperature experienced respectively 750 ° C, 650 ° C and 350 ° C were very significant. The phase that appears is tempered martensit surrounding refinement fine tempered martensite and decreasing hardness from 496 HvN to 257 HvN.