MGH956合金表面氧化膜形态与性能研究  

Study on morphology and properties of oxidation film on MGH956 alloy surface

作　　者：李开松 杨云骢 肖辉钦 李晶琨 LI Kaisong;YANG Yuncong;XIAO Huiqin;LI Jingkun(Gaona Aero Material Co.,Ltd.,Beijing 100081,China;Shanghai Phigine Medical Co.,Ltd.,Shanghai 200120,China;Jiangsu Lingli Medical Technology Development Co.,Ltd.,Rugao 213161,China;School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300401,China;Key Lab of New Functional Materials in Hebei Province,Tianjin 300401,China)

机构地区：[1]北京钢研高纳科技股份有限公司,北京100081 [2]上海焕擎医疗科技有限公司,上海200120 [3]江苏凌力医疗科技发展有限公司,如皋213161 [4]河北工业大学材料科学与工程学院,天津300401 [5]河北省新型功能材料重点实验室,天津300401

出　　处：《江西冶金》2024年第4期263-270,共8页Jiangxi Metallurgy

摘　　要：MGH956合金具有高熔点、低密度、优异的高温强度等优点,高温氧化后在表面生成一层致密的氧化膜,可以有效保护合金基体。本研究以MGH956合金为研究对象,通过高温氧化工艺在合金表面制备氧化膜,利用扫描电子显微镜(SEM)、纳米力学探针、微米划痕仪等表征高温氧化时间对MGH956合金表面氧化膜形貌与性能的影响。结果表明,随着氧化时间延长,氧化膜厚度由7.2μm增至15.7μm;氧化膜的弹性模量呈先降低后略升高的趋势,当氧化时间为25 h时,弹性模量最高(342.3 GPa);氧化膜与基体之间的界面结合强度不断增加,当氧化时间为100 h和150 h时,界面结合强度最大;在1250℃下,当氧化时间为50 h和100 h时,氧化膜表面质量较好,氧化膜与基体之间的界面结合强度最大,氧化膜硬度及耐磨损性能均保持较高水平。因此,建议采用50 h或100 h高温氧化工艺制备氧化膜。MGH956 alloy has the advantages of high melting point,low density,excellent high-temperature strength,etc.After high-temperature oxidation,MGH956 alloy generates a layer of dense oxidation film on its surface,which can effectively protect the alloy matrix.In this study,MGH956 alloy is taken as the research object,and the oxidation film is prepared on the surface of the alloy through high-temperature oxidation process,and the effect of high-temperature oxidation time on the morphology and properties of the oxidation film on the surface of MGH956 alloy is characterized by using scanning electron microscope(SEM),nano mechanic probe,and micrometer scratching instrument.The results show that the thickness of the oxidation film increases from 7.2μm to 15.7μm with the extension of oxidation time;the elastic modulus of the oxidation film shows a tendency of decreasing and then slightly increasing,and the elastic modulus is the highest(342.3 GPa)when the oxidation time is 25 h.The strength of the interfacial bonding between the oxidation film and the substrate increased continuously,and its strength is the largest when the oxidation time is 100 and 150 h.The surface quality of the oxidation film is fine when oxidized at 1250℃for 50 and 100 h,and the hardness,bonding strength and wear resistance of the oxidation film are kept at a high level.Therefore,the comprehensive properities of the oxidation film generated by 50 and 100 h high temperature oxidation is optimal.

关 键 词：MGH956合金 高温氧化 氧化膜 表面性能 

分 类 号：TG178[金属学及工艺—金属表面处理]