热处理工艺对15-5PH沉淀硬化不锈钢的力学性能与耐蚀性的影响

 研究了热处理工艺对15-5PH沉淀硬化不锈钢力学性能与耐蚀性的影响，并观察了钢中的强化相。结果表明，随着时效温度的升高和保温时间的延长钢的强度逐渐下降，塑性及冲击吸收功逐渐升高，这是由于逆转变奥氏体体积分数随温度升高而增加所造成的；随着时效温度升高钢的耐点腐蚀性能逐渐下降，在580和600 ℃时耐蚀性最差，在480 ℃时效钢的耐点腐蚀性能最佳且具有最高的强度，钢中主要的强化相是具有面心立方结构的富铜相。

Effect of Heat Treatment on Mechanical Properties and Corrosion Resistance of 15-5PH Stainless Steel

This paper studies the effect of heat treatment on mechanical properties and corrosion resistance of 15-5PH precipitation hardening stainless steel, and observes the precipitated phase in steel.The results show that the strength of steel decreased with the aging temperature increased and the aging time extended, while the toughness of steel increased. This is caused by the reverse austenite volume fraction increased with the temperature raised; The pitting corrosion resistance of the steel reduced along with the aging temperature increased, the corrosion resistance of steel was at the poorest when aging at 580 and 600 ℃, while the corrosion resistance of steel reached the best and the strength was the highest when aging at 480 ℃, and the main precipitated phase was a rich copper phase of face-centered cubic structure in steel.