激光喷丸与机械喷丸对304不锈钢应力腐蚀性能的影响

发布时间：2018-06-06 22:26

本文选题：不锈钢 + 机械喷丸　；参考：《材料热处理学报》2015年06期

【摘要】：对304不锈钢板试样分别进行了激光喷丸与机械喷丸处理,采用X射线衍射仪分析了表层显微组织和晶粒尺寸的变化,通过慢应变速率拉伸腐蚀试验检测了应力腐蚀敏感性。结果表明,通过激光喷丸处理,表层晶粒得到了细化,但没有产生明显的马氏体相变,随着喷丸能量密度增大,应力腐蚀敏感性减小;而通过机械喷丸处理的试样,晶粒细化的同时诱发了明显的马氏体相变,随着喷丸压力升高,应力腐蚀敏感性呈现先减小后增大的变化趋势。
[Abstract]:Laser shot peening and mechanical shot peening were carried out on 304 stainless steel plate. The microstructure and grain size of surface layer were analyzed by X-ray diffractometer. The stress corrosion sensitivity was tested by slow strain rate tensile corrosion test. The results show that the surface grain is refined by laser shot peening, but no martensite transformation is produced. The stress corrosion sensitivity decreases with the increase of shot peening energy density. The martensitic transformation was induced by grain refinement, and the stress corrosion sensitivity decreased first and then increased with the increase of shot peening pressure.
【作者单位】：浙江工业大学机械工程学院;浙江省特种装备制造与先进加工技术重点实验室;
【分类号】：TG142.71;TG668

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