氢致马氏体对304不锈钢在MgCl_2中应力腐蚀的影响  

EFFECT OF HYDROGEN-INDUCED MARTENSITE ON STRESS CORROSION CRACKING OF TYPE 304 STAINLESS STEEL IN BOILING MgCl2

作　　者：陈浩[1] 王燕斌[1] 褚武扬[1] 高克玮[1] 乔利杰[1] 

机构地区：[1]北京科技大学材料物理系,北京100083

出　　处：《金属学报》2002年第10期1079-1081,共3页Acta Metallurgica Sinica

基　　金：国家重点基础研究发展规划 G19990650;国家自然科学基金50071010资助项目

摘　　要：通过电解充氢后除气,即可在304奥氏体不锈钢中引入不同数量的氢致马氏体（ε+α’,其中ε占 2/3）;同时并未明显改变试样的强度和位错密度.氢致马氏体使304不锈钢脆化,塑性损失随马氏体含量升高而升高.在沸腾MgCl2溶液中慢应变速率拉伸实验表明,随氢致马氏体含量升高,应力腐蚀敏感性也升高;但当马氏体总量超过10％之后,应力腐蚀敏感性逐渐趋于一个稳定值.Hydrogen-induced martensite in type 304 stainless steel were formed through cathodic charging and then outgassing at 250 degreesC. Susceptibility to stress corrosion cracking (SCC) for the specimens with various hydrogen-induced martensite was measured by slow strain rate tests in a MgCl2 solution and in silicon oil at 143 degreesC, respectively. The result shows the susceptibility to SCC increased with increasing the amount of hydrogen-induced martensite, but approached gradually a saturation value after the martensite exceeded 10 volume fraction in percent.

关 键 词：304不锈钢 氢致马氏体 MgCl2应力腐蚀 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG142.71[金属学及工艺—金属学]