摘要
采用慢应变速率拉伸的应力腐蚀试验法,结合应力应变试验、显微组织观察、力学性能测试和断口形貌分析,研究了不同时效处理后17-4PH马氏体不锈钢在N2、通入饱和H2S的NACE A溶液和3%CO2+3%H2S+N2+H2O三种介质中的抗应力腐蚀性能。结果表明,通入饱和H2S的NACE A溶液对17-4PH不锈钢的应力腐蚀最为严重,试样断口呈现脆性断裂特征。时效工艺对材料的应力腐蚀敏感性有明显影响,600℃+605℃双级时效处理后17-4PH不锈钢的抗应力腐蚀性能优于600℃时效处理。
Stress corrosion ( SC) properties of 17-4PH stainless steel in three media of N 2 , NACE A solution saturated with H 2 S and 3%CO2 +3%H2S+N2 +H2O were discussed by slow strain rate tension combining with the stress-strain test, microstructure observation, mechanical properties test and fracture morphology analyses .The results showed that specimens were corroded more seriously in NACE A solution saturated with H2 S compared to the other two media , and the fracture morphology appears as brittle characteristic .The stress corrosion susceptibility was obviously affected by aging process , specimens double aged at 600 ℃+605 ℃ get better stress corrosion properties and lower SC susceptibility index than aged at 600 ℃.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第3期104-108,共5页
Heat Treatment of Metals
关键词
马氏体不锈钢
应力腐蚀
时效处理
腐蚀介质
martensite stainless steel
stress corrosion(SC)
aging
corrosive medium
