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首页> 外文期刊>Journal of Manufacturing Processes >Repair of 304 stainless steel by laser cladding with 316L stainless steel powders followed by laser surface alloying with WC powders
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Repair of 304 stainless steel by laser cladding with 316L stainless steel powders followed by laser surface alloying with WC powders

机译：用316L不锈钢粉末进行激光熔覆，然后用WC粉进行激光表面合金化，从而修复304不锈钢。

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摘要

304 stainless steel substrates with a trapezoidal groove are repaired by laser cladding with 316L stainless steel powders, and then the repaired surfaces are modified with cast WC powders by laser surface alloying. The microstructure of the cladded zone consists of columnar dendrites, clusters of cells and equiaxed grains, and the microstructure of the alloyed layer consists of supersaturated austenite dendrites and homogeneous interdendritic networked carbides. Most of the WC particles are dissolved in the matrix with a few partially melted WC particles sparsely distributed in the alloyed layer. No visible macro pore or crack is observed before and after wear test, indicating a potential good fatigue performance of the repaired part. The sample with the highest WC content (24.4% wt.) exhibits the highest hardness of 550 HV0.5 and the minimum mass loss of 0.7 mg. The wear performance is significantly higher than that of the substrate with mass loss of 11.9 mg. With the increase of WC content, the wear mechanism transformed from adhesion to abrasion due to the hardening matrix and the increase of the un-melted WC particles. (C) 2016 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
机译：通过用316L不锈钢粉末进行激光熔覆来修复具有梯形凹槽的304不锈钢基材，然后通过铸造的WC粉通过激光表面合金化对修复的表面进行改性。熔覆区的微观结构由柱状枝晶，晶胞簇和等轴晶粒组成，合金层的微观结构由过饱和奥氏体枝晶和均匀的枝晶间网状碳化物组成。大部分WC颗粒溶解在基体中，少数部分熔化的WC颗粒稀疏分布在合金层中。在磨损测试之前和之后均未观察到可见的大孔或裂纹，表明修复后的零件可能具有良好的疲劳性能。 WC含量最高（24.4％重量）的样品具有550 HV0.5的最高硬度和0.7 mg的最小质量损失。磨损性能显着高于基材，具有11.9 mg的质量损失。随着WC含量的增加，由于硬化基体和未熔化的WC颗粒的增加，磨损机理从附着力转变为磨损。 （C）2016年制造工程师学会。由Elsevier Ltd.出版。保留所有权利。

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  • 来源
    《Journal of Manufacturing Processes》 |2016年第1期|116-124|共9页
  • 作者

    Song Lijun; Zeng Guangcheng; Xiao Hui; Xiao Xianfeng; Li Simeng;

  • 作者单位

    Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, Changsha 410082, Hunan, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laser cladding; Laser surface alloying; Laser repairing; Additive manufacturing; WC;

    机译：激光熔覆;激光表面合金化;激光修复;增材制造;WC;

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