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热处理工艺对304不锈钢熔覆层组织和性能的影响

Effect of Heat Treatment Process on Microstructures and Properties of 304 Stainless Steel Cladding Layers

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摘要

在27SiMn钢表面通过预置送粉方法得到了激光熔覆层,并对熔覆层进行了热处理。分析了热处理前后试样的显微组织、相结构、拉伸性能、断口形貌和显微硬度,获得了较优的热处理工艺参数。结果表明,热处理工艺可细化熔覆层的晶粒,使熔覆层的显微组织更加致密;热处理工艺可以改善材料的塑性和韧性,增大材料的抗拉强度,减小材料的显微硬度。在最优热处理工艺下,试样的晶粒均匀、细小且拉伸性能优异。

Abstract

The laser cladding layers on the 27SiMn steel surface are obtained by the preset powder feeding method, and the heat treatment to these cladding layers is also conducted. The microstructures, phase structures, tensile properties, fracture morphologies and microhardness specimens before and after heat treatment are investigated, and the better heat treatment process parameters are obtained. The results show that the heat treatment process can refine the grain size of cladding layers, which makes microstructures denser. The heat treatment process can improve the plasticity and toughness, which enhances the tensile strength and reduces the microhardness of materials. Under the optimal heat treatment process, the grains of specimens are refined and homogeneous, and the tensile property is superior.

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中图分类号:TG161

DOI:10.3788/lop55.051405

所属栏目:激光器与激光光学

基金项目:国家自然科学基金(51775427)

收稿日期:2017-10-20

修改稿日期:2017-11-21

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作者单位    点击查看

柴蓉霞:西安科技大学机械工程学院, 陕西 西安 710054
李凯凯:西安科技大学机械工程学院, 陕西 西安 710054
郭卫:西安科技大学机械工程学院, 陕西 西安 710054
方秀荣:西安科技大学机械工程学院, 陕西 西安 710054

联系人作者:柴蓉霞(joancra_030159@163.com)

备注:柴蓉霞(1977—),女,博士,讲师,主要从事材料成形、表面工程方面的研究。E-mail: joancra_030159@163.com

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引用该论文

Chai Rongxia,Li Kaikai,Guo Wei,Fang Xiurong. Effect of Heat Treatment Process on Microstructures and Properties of 304 Stainless Steel Cladding Layers[J]. Laser & Optoelectronics Progress, 2018, 55(5): 051405

柴蓉霞,李凯凯,郭卫,方秀荣. 热处理工艺对304不锈钢熔覆层组织和性能的影响[J]. 激光与光电子学进展, 2018, 55(5): 051405

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