摘要
采用3种表面喷丸压力对304不锈钢板状试样进行强化处理。通过扫描电子显微镜分析了强化层的厚度和晶粒细化程度,采用显微硬度计检测了表层显微硬度分布。通过5%NaCl溶液中慢应变速率拉伸试验,比较了0.25、0.30和0.40 MPa喷丸压力处理后试样的应力腐蚀敏感性。结果表明:表面喷丸强化处理可以细化试样表层晶粒,提高硬度;随着喷丸压力的升高,试样表层晶粒层厚度增大,表面硬度提高,应力腐蚀敏感性指数降低。
The surface of 304 austenitic stainless steel sheet specimen was processed by three different shot peening pressures.The thickness of grain refinement layer and refined degree were characterized by SEM and surface hardness was tested by microhardness tester.The stress corrosion susceptibility of the specimens treated by 0.25,0.30 and 0.40 MPa shot peening was compared through the slow strain rate tensile tests method in 5% sodium chloride solution.The results show that shot peening causes grain refinement in the surface layer and hardness is increased;with the rise of shot peening pressure,the thickness of grain refinement layer is increased,the surface hardness heightened and the stress corrosion susceptibility index decreased.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第10期42-44,共3页
Heat Treatment of Metals
基金
浙江省自然科学基金(Y1110999)
关键词
304不锈钢
喷丸
晶粒细化
应力腐蚀敏感性
304 stainless steel
shot peening
grain refinement
stress corrosion susceptibility
