Effects of Nb and Heat Treatment on Structure and Properties of High Chromium Cast Iron
The heat treatment technology of high chromium cast iron(Mo-free) was studied through adding in proper Nb and Mn.The results show that Nb with high temperature quenching pluses sub-critical tempering can improve both the eutectic carbide distribution and its pattern,and results in the second hardening effect notably.The tested alloys have nearly the same hardness value as that of Cr15Mo1Cu1 cast iron,however the wear resistance is better than the latter.