激光清洗钛合金表面氧化皮对基体性能的影响  

Effect of Laser Cleaning Titanium Alloy Surface Scale on Matrix Properties

作　　者：王利华 王力强 罗长鹏 王少阳 华志嘉 王春明[2] WANG Lihua;WANG Liqiang;LUO Changpeng;WANG Shaoyang;HUA Zhijia;WANG Chunming(Chengdu Aircraff Industrial(Group)Co.,Ltd.,Chengdu 610092,China;School of Material Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]成都飞机工业(集团)有限责任公司,四川成都610092 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《热加工工艺》2023年第18期75-79,共5页Hot Working Technology

摘　　要：针对TC4钛合金高温热成型所形成的氧化皮,通过光学显微镜、扫描电镜、HV-1000维氏硬度计、Instron8801拉伸实验系统、CS系列电化学工作站、EPMA-8050G电子探针显微分析仪,研究了激光清洗工艺对该氧化皮去除程度、钛合金表面硬度、拉伸性能、表面抗腐蚀性能与表面元素成分的影响。结果表明,钛合金经激光清洗后,在高温下形成的高温氧化皮完全被去除,同时基材表面显微硬度上升8.5%(由286.33 HV提高至310.65 HV),抗拉强度和屈服强度分别提升1.8%和4.3%,表面氧元素占比下降87.7%,表面腐蚀速率是未经激光清洗钛合金的18.3%。激光清洗工艺能有效代替航空领域传统的高温NaOH碱爆清洗工艺。Aiming at the surface scale formed during high temperature hot forming process of TC4 titanium alloy,the influence of laser cleaning process on the cleaning effect,surface hardness,tensile properties,corrosion resistance and surface element composition of titanium alloy were separately studied by optical microscope,scanning electron microcopy,HV-1000 Vickers hardness tester,Instron 8801 tensile testing system,CS electrochemical workstation and EPMA-8050G electron probe microanalyzer.The test results show that the laser cleaning process could remove the high-temperature scale on the surface of titanium alloy.The surface microhardness of titanium alloy increases by 8.5%(from 286.33 HV to 310.65 HV).The tensile strength and yield strength increase respectively by 1.8%and 4.3%.The proportion of surface oxygen content decreases by 87.7%and the surface corrosion rate is 18.3%of titanium alloy without laser cleaning.The laser cleaning technology can effectively replace the traditional high-temperature NaOH cleaning process in the aeronautical field.

关 键 词：激光清洗 钛合金 氧化皮 性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG178[金属学及工艺—金属材料]