慢应变拉伸速率和H_2S,Cl^-及H^+浓度对08Cr2AlMo钢应力腐蚀开裂的影响  

Influence of SSRT Rate and Concentration of H^2S,Cl^-,H^+ in Solution on Stress Corrosion Cracking of 08Cr2AlMo Steel

作　　者：张耀丰[1,2] 梁鹏 顾伯勤[2] 

机构地区：[1]南京市锅炉压力容器检验研究院,江苏南京210002 [2]南京工业大学机械与动力工程学院,江苏南京210009

出　　处：《压力容器》2010年第9期11-15,共5页Pressure Vessel Technology

摘　　要：通过慢应变速率拉伸、均匀设计和扫描电镜等方法,研究了慢应变拉伸速率和H2S,Cl-及H+浓度对08Cr2AlMo钢应力腐蚀开裂敏感性的影响。研究表明,随着拉伸应变速率的减小,08Cr2AlMo钢在饱和H2S溶液中的应力腐蚀敏感性基本呈单调增加的趋势,拉伸速率为5.67×10-6s-1时试样已发生应力腐蚀开裂。H2S,Cl-及H+浓度对08Cr2AlMo钢的应力腐蚀开裂敏感性具有重要影响作用,影响因素两两之间存在协同作用。在饱和H2S溶液中,杂质离子Cl-和H+对08Cr2AlMo钢的应力腐蚀开裂具有促进作用。The influence of SSRT rate and concentration of H2S,Cl-,H＋ in the solution on the stress corrosion cracking（SCC） of 08Cr2AlMo steel was investigated by the means of slow strain rate tensile（SSRT）,uniform design and scan electron micrograph.It indicates that SCC susceptibility of 08Cr2AlMo steel increases with the decrease of SSRT rate in the saturated H2S solution.5.67×10-6/s is the rate under which SCC of this steel will be occurred in the saturated H2S solution.The concentration of H2S,Cl-,H＋ in the solution is very important to the SCC susceptibility of 08Cr2AlMo steel,both of which have the function of synergy.Foreign ion of Cl-,H＋ will increase the SCC susceptibility of 08Cr2AlMo steel in the saturated H2S solution.

关 键 词：慢应变拉伸速率 H2S浓度 Cl-浓度 H+浓度 应力腐蚀开裂敏感性 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG172.9[金属学及工艺—金属材料]