氢对304L奥氏体不锈钢力学性能的影响  

Effect of Hydrogen on Mechanical Properties of 304L Austenitic Stainless Steel

作　　者：姜勇[1] 巩建鸣[1] 周荣荣[1] 戴越[2] 

机构地区：[1]南京工业大学机械与动力工程学院,南京210009 [2]江苏省机械研究设计院,南京210012

出　　处：《机械工程材料》2009年第11期15-18,共4页Materials For Mechanical Engineering

基　　金：江苏省"六大人才高峰"项目(06-D-035)

摘　　要：对304L奥氏体不锈钢试样进行了一系列的电解充氢试验,并对充氢试样进行了拉伸和冲击试验。结果表明:在20 mA.cm-2的电流密度下充氢96 h后,304L不锈钢中的氢含量为14 mg.kg-1,材料强度、塑性和韧性均有一定程度的降低;充氢后拉伸试样断口表层由充氢前的韧性断裂转变为由氢导致的脆性断裂。A series of electrochemical hydrogen charging tests were carried out for 304L austenitie stainless steel. Tensile tests and impact tests were employed for hydrogen-charging specimen. The results show that the hydrogen content was 14 mg.kg^-1 in 304L stainless steel after 96 h hydrogen charging with the current density of 20 mA.cm^-2. Hydrogen in the steel induced decline of strength , plasticity and toughness in some degree. The fractography showed the tensile specimen fractue surface changed form ductile fracture before hydrogen-charging to embrittlement fracture after hydrogen-changing.

关 键 词：不锈钢 电解充氢 氢脆 力学性能 

分 类 号：TG174.3[金属学及工艺—金属表面处理]