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利用扫描电镜(SEM),表面粗糙度测试仪,电化学工作站等仪器,分析了机械研磨对316L不锈钢件表面及其低温渗铝层性能的影响。结果表明:机械研磨过程中,材料表面在研磨球撞击、旋压等多种作用下产生大塑性变形,形成大量组织结构缺陷并细化表层晶粒,导致试样表面粗糙度变大,硬度提高,直接影响到热处理过程及其渗层性能;机械研磨处理的316L不锈钢试样经低温渗铝后,与对比试样相比,渗铝层硬度可提高2倍以上,抗高温氧化性及耐腐蚀性能均有显著提高,同时进行了相关机理的分析探讨。
The effects of mechanical grinding on the surface of 316L stainless steel and its low temperature aluminized layer were analyzed by scanning electron microscopy (SEM), surface roughness tester and electrochemical workstation. The results show that during the mechanical grinding process, the material surface produces large plastic deformation under the effect of grinding ball impact and spinning, forming a large number of structural defects and refining the surface grain, resulting in the increase of surface roughness and hardness , Directly affect the heat treatment process and its layer performance; mechanical grinding 316L stainless steel samples after low temperature aluminizing, compared with the control sample, the aluminized layer hardness can be increased more than 2 times, high temperature oxidation resistance and corrosion resistance Performance were significantly improved, at the same time, the relevant mechanism analysis and discussion.