退火温度对AlxTixNixCoCrCu0.5FeMo高熵合金涂层组织和性能的影响
Effect of Annealing Temperature on Microstructure and Properties of AlxTixNixCoCrCu0.5FeMo High Entropy Alloy Coating
摘 要
在40Cr钢表面激光熔覆AlxTixNixCoCrCu0.5FeMo (x=4,5,6,7,8,9,物质的量比)高熵合金涂层,并进行300~900℃退火处理,研究了退火温度对涂层组织和性能的影响。结果表明:未退火及300℃退火处理的高熵合金涂层均为单一的体心立方(BCC)相结构,500~900℃退火后合金涂层中生成类Al2Ti3结构金属间化合物相;当退火温度升高至500℃时,晶内耐腐蚀性变差,且涂层耐腐蚀性随退火温度升高而下降;随着退火温度升高,高熵合金涂层的硬度呈先下降后升高再下降的趋势,700℃退火处理的Al4Ti4Ni4CoCrCu0.5FeMo合金硬度最大,为1 019 HV。
显微组织
金属间化合物
硬度
耐腐蚀性
high entropy alloy
microstructure
intermetallic compound
hardness
corrosion resistance
Abstract
AlxTixNixCoCrCu0.5FeMo (x=4, 5, 6, 7, 8, 9, molar ratio) high-entropy alloy coating was laser cladded on the surface of 40Cr steel and annealed at 300-900℃. The effect of annealing temperature on the microstructure and properties of the coating was studied. The results show that both unannealed and 300℃ annealed high-entropy alloy coatings had a single body-centered cubic (BCC) phase structure, and Al2Ti3-like intermetallic compound phase was formed in the alloy coatings after annealing at 500-900℃. When the annealing temperature increased to 500℃, the intragranular corrosion resistance became poor, and the corrosion resistance of the coating decreased with increasing annealing temperature. With increasing annealing temperature, the hardness of the high-entropy alloy coating first decreased, then increased and then decreased. The Al4Ti4Ni4CoCrCu0.5FeMo alloy annealed at 700℃ had the highest hardness, which was 1 019 HV.
中图分类号 TG174.44 DOI 10.11973/jxgccl202205007
所属栏目 试验研究
基金项目 广东省高熵合金及其复合材料重点实验室建设项目(江科[2018]352号);江门市工程中心建设项目(江科[2016]161号,江科[2018]359号);江门市基础与应用基础研究重点项目(2020030102850008923)
收稿日期 2021/3/8
修改稿日期 2022/1/18
网络出版日期
作者单位点击查看
备注黄元盛(1969-),男,广东高州人,教授,博士
引用该论文: HUANG Yuansheng,WEN Lizhe. Effect of Annealing Temperature on Microstructure and Properties of AlxTixNixCoCrCu0.5FeMo High Entropy Alloy Coating[J]. Materials for mechancial engineering, 2022, 46(5): 42～46
黄元盛,温立哲. 退火温度对AlxTixNixCoCrCu0.5FeMo高熵合金涂层组织和性能的影响[J]. 机械工程材料, 2022, 46(5): 42～46
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【4】LI W,LIU P,LIAW P K.Microstructures and properties of high-entropy alloy films and coatings:A review[J].Materials Research Letters,2018,6(4):199-229.
【5】LIANG H,YAO H W,QIAO D X,et al.Microstructures and wear resistance of AlCrFeNi2W0.2Nb<i>x high-entropy alloy coatings prepared by laser cladding[J].Journal of Thermal Spray Technology,2019,28(6):1318-1329.
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【13】张冲,吴旭晖,戴品强.FeCoCr0.5NiBSi<i>x高熵合金涂层的高温冲蚀磨损性能[J].表面技术,2019,48(2):166-172. ZHANG C,WU X H,DAI P Q.Erosive wear properties of FeCoCr0.5NiBSix high-entropy alloy coating at high temperature[J].Surface Technology,2019,48(2):166-172.
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【16】PEYROUZET F,HACHET D,SOULAS R,et al.Selective laser melting of Al0.3CoCrFeNi high-entropy alloy:Printability,microstructure,and mechanical properties[J].JOM,2019,71(10):3443-3451.
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【19】温立哲,黄元盛.激光熔覆AlCoCrCu0.5FeMoNiTi高熵合金涂层的组织与性能[J].粉末冶金技术,2016,34(4):268-271. WEN L Z,HUANG Y S.Microstructure and property of laser cladding CoCrCu0.5FeMoNiTi high-entropy alloys coating[J].Powder Metallurgy Technology,2016,34(4):268-271.
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【21】温立哲,黄元盛.高熵合金析出相热动力学分析及组成相耐蚀性研究[J].有色金属工程,2018,8(6):6-9. WEN L Z,HUANG Y S.Precipitation thermokinetics analysis and corrosion resistance of high entropy alloy phase composition[J].Nonferrous Metals Engineering,2018,8(6):6-9.
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