摘要
采用920℃水冷淬火后再经560～650℃保温3 h的回火工艺,研究了不同回火工艺对新型系泊链钢组织、耐蚀性能的影响。结果表明,该新型系泊链钢随回火温度从560℃升高到650℃,碳化物析出类型由低温的M3C型向高温的M7C3和M23C6型转变;形态由低温细小棒状和片状逐渐向高温颗粒较大椭圆状和球状转变;耐蚀性能逐渐变好,应力腐蚀敏感性也逐渐减小。耐蚀性能的变化主要是由回火组织中相界、晶界及碳化物的数量和形态的变化所引起的。
Effects of heat treatment on microstructure and corrosion resistance of a new mooring chain steel were investigated after being quenched at 920℃ with water cooling and subsequently tempered in the range of 560-650℃ for 3 h, respectively. The results show that with increasing tempering temperature, the precipitated carbides transform from M3C type to M7C3 type and/or M23C6 type, these morphologies of carbides change from fine rod and plate to elliptical and/or spherical, and meanwhile, the corrosion resistance is improved and stress corrosion sensitivity decreases. These corrosion resistance improvements are related to the microstructure variation of phase boundaries, grain boundaries, amounts of carbides and morphologies of carbides with tempering temperature.
出处
《金属热处理》
CAS
CSCD
北大核心
2012年第8期1-7,共7页
Heat Treatment of Metals
基金
上海市教委创新项目(09YZ28)
上海市自然基金项目(11ZR1412800)
上海市重点学科建设项目(S30107)
关键词
系泊链钢
回火
组织
耐蚀性
mooring chain steel
tempering
microstructure
corrosion resistance
