复合热处理对新型钢结构材料性能的影响

Effects of Composite Heat Treatment on Performance of New Steel Structure Material

分别采用常规退火工艺、均匀化处理+球化退火的复合热处理工艺对新型钢结构材料进行了热处理。结果表明:与常规退火相比,复合热处理明显细化材料的组织,使碳化物以细小颗粒状弥散分布;显著改善材料的力学性能和耐腐蚀性能,室温抗拉强度、屈服强度和断后伸长率分别增加26.4%、29.5%、33.1%,在5%氯化钠溶液中腐蚀240 h后的质量损失率减小81.9%。

New steel structure material was heat-treated with conventional annealing process, composite heat treatment process of homogenization treatment and spheroidizing annealing respectively. The results show that compared with the conventional annealing, composite heat treatment significantly refines material microstructure, makes carbides distributed in tiny particle, and drastically improves the mechanical properties and the corrosion resistance. The tensile strength, the yield strength and the break elongation at room temperature increase by 26.4%, 29.5%, 33.1% respectively, and the rate of mass loss after corrosion of 240 h in % sodium chloride solution decreases by 81.9%.