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FexCoCrAlCu/Q235激光合金化层组织及性能研究

Study on Microstructure and Performance of a FexCoCrAlCu/Q235 Laser Alloying Coatings

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摘要

采用激光合金化法在Q235钢表面制备FexCoCrAlCu(x=0,0.5,1,2)高熵合金涂层。利用X射线衍射仪(XRD)、电子显微镜(SEM)、能谱仪(EDS)和显微硬度计对激光合金化层的相结构、显微组织、化学成分和硬度进行分析。结果表明,不同Fe含量的FexCoCrAlCu/Q235高熵合金化涂层均为具有简单体心立方(BCC)结构的固溶体,合金化层与基体间呈良好的冶金结合,显微组织为典型的枝晶组织,固溶体组织中出现了成分偏析现象。激光合金化层的显微硬度远高于基材Q235钢,且随着Fe主元含量的增加,涂层显微硬度呈下降趋势。FexCoCrAlCu/Q235激光高熵合金化层由表面至基材体系的混合熵呈高熵中熵低熵梯度变化。

Abstract

FexCoCrAlCu (x=0,0.5,1,2) high entropy alloy coatings are prepared by laser surface alloying on the surface of Q235 steel. The constituent phases, microstructure, chemical composition and microhardness of the laser alloying coatings are analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), energy disperse spectroscopy (EDS) and microhardness tester respectively. The experimental results show that FexCoCrAlCu/Q235 high entropy alloying coatings with different Fe content form single body-centered cubic (BCC) solid solution. The laser alloying coatings have good metallurgical bonding to the substrate. The solidfied microstructure is the typical dendritic structure with component segregation. The microhardness of the laser alloying coatings is much higher than that of the Q235 steel, and the microhardness of the coatings tends to decrease gradually with the increase of Fe content. From the surface of FexCoCrAlCu/Q235 laser high entropy alloying coatings to the substrate, the mixing entropy presents gradient distribution from high entropy, medium entropy to low entropy.

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中图分类号:TG146.4

DOI:10.3788/cjl201441.0803006

所属栏目:激光制造

基金项目:国家自然科学基金(51271126)、辽宁省自然科学基金(2013020101)、沈阳市科技局计划项目(F13-318-1-52、F13-070-2-00)

收稿日期:2014-01-22

修改稿日期:2014-03-31

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作者单位    点击查看

张松:沈阳工业大学材料科学与工程学院, 辽宁 沈阳 110870
吴臣亮:沈阳工业大学材料科学与工程学院, 辽宁 沈阳 110870
伊俊振:沈阳工业大学材料科学与工程学院, 辽宁 沈阳 110870
王超:沈阳工业大学材料科学与工程学院, 辽宁 沈阳 110870
张春华:沈阳工业大学材料科学与工程学院, 辽宁 沈阳 110870
关锰:沈阳鼓风机集团有限公司, 辽宁 沈阳 110869
谭俊哲:沈阳鼓风机集团有限公司, 辽宁 沈阳 110869

联系人作者:张松(songzhang_sy@163.com)

备注:张松(1963—),女,博士,教授,博士生导师,主要从事激光先进制造技术方面的研究。

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引用该论文

Zhang Song,Wu Chenliang,Yi Junzhen,Wang Chao,Zhang Chunhua,Guan Meng,Tan Junzhe. Study on Microstructure and Performance of a FexCoCrAlCu/Q235 Laser Alloying Coatings[J]. Chinese Journal of Lasers, 2014, 41(8): 0803006

张松,吴臣亮,伊俊振,王超,张春华,关锰,谭俊哲. FexCoCrAlCu/Q235激光合金化层组织及性能研究[J]. 中国激光, 2014, 41(8): 0803006

被引情况

【1】周芳,刘其斌,郑波. Si、Al 添加对MoFeCrTiW 高熵合金涂层组织性能的影响. 中国激光, 2016, 43(2): 203002--1

【2】孙桂芳,陶丰,姜波,姬文宣,牛牧遥,沈旭婷. 医用不锈钢激光合金化铜钴合金的组织及其生物医学性能. 中国激光, 2018, 45(12): 1202008--1

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