喷丸处理对6061铝合金抗腐蚀性能影响  

Effect of shot peening treatment on corrosion resistance of 6061 aluminum alloy

作　　者：李坤[1] 龚虎虎 张创创 沙豪杰 LI Kun;GONG Huhu;ZHANG Chuangchuang;SHA Haojie(School of Mechanical Engineering,Anhui University of Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学机械工程学院,安徽淮南232001

出　　处：《湖南文理学院学报（自然科学版）》2024年第1期27-31,共5页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：安徽省高校优秀青年骨干教师国内访问研修项目(gxgnfx2022006);安徽理工大学引进人才科研启动基金(2022 yjrc35)。

摘　　要：将6061铝合金进行超声喷丸处理,喷丸时间分别为0、90、180、270 s。对喷丸面进行表面粗糙度、显微维氏硬度、残余应力测量,采用标准中性盐雾腐蚀试验探究不同喷丸处理试样的抗腐蚀行为,分析粗糙度、硬度、残余应力对其抗腐蚀性能的综合影响。试验结果表明:随着喷丸处理时长由90 s变至270 s,铝合金表面粗糙度逐渐降低,硬度在距喷丸表面0~600μm之间有较为明显的提高,表面残余应力有显著提高,并且粗糙度增加会促进盐雾腐蚀,硬度与残余应力升高会抑制盐雾腐蚀,盐雾腐蚀结果表明,在喷丸处理时长由0s变至270 s的4个试样中喷丸90 s时的盐雾腐蚀速率最快,而喷丸270 s时的试样盐雾腐蚀速率最慢。The 6061 aluminium alloy was subjected to ultrasonic shot peening with shot peening time of 0 s,90 s,180 s and 270 s,respectively,and the surface roughness,micro-Vickers hardness and residual stress of the shot peening surface were measured.The corrosion resistance behaviour of different shot peening samples was explored by standard neutral salt spray corrosion test,and the comprehensive effects of roughness,hardness and residual stress on its corrosion resistance were analysed.The test results show that with the change of shot peening treatment time from 90 s to 270 s,the surface roughness of aluminium alloy gradually decreases,the hardness significantly increases between 0~600μm from the shot peening surface,and the surface residual stress significantly improves.The increase of roughness promotes salt spray corrosion,while the increase of hardness and residual stress inhibits salt spray corrosion.The salt spray corrosion results show that the salt spray corrosion rate of the sample with shot peening time of 90 s is the fastest among the four,while the corrosion rate of salt spray in the specimen at 270 s is the slowest.

关 键 词：超声喷丸 盐雾腐蚀 维氏硬度 表面粗糙度 残余应力 

分 类 号：TG178[金属学及工艺—金属表面处理]