金属热处理 ›› 2020, Vol. 45 ›› Issue (4): 188-193.DOI: 10.13251/j.issn.0254-6051.2020.04.040

• 表面工程 • 上一篇    下一篇

27SiMn钢表面激光熔覆304不锈钢的组织和性能

王贤才1, 张亚普2, 柴蓉霞2   

  1. 1. 蚌埠学院 机械与车辆工程学院, 安徽 蚌埠 233030;
    2. 西安科技大学 机械工程学院, 陕西 西安 710054
  • 收稿日期:2019-09-27 出版日期:2020-04-25 发布日期:2020-05-08
  • 作者简介:王贤才(1981—),男,讲师,硕士,主要从事机械设计与制造研究,E-mail:xcxz1981@163.com
  • 基金资助:
    国家重点研发计划(2017YFC0804310)

Microstructure and properties of 304 stainless steel laser cladding on 27SiMn steel surface

Wang Xiancai1, Zhang Yapu2, Chai Rongxia2   

  1. 1. College of Mechanical and Vehicle Engineering, Bengbu University, Bengbu Anhui 233030, China;
    2. College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China
  • Received:2019-09-27 Online:2020-04-25 Published:2020-05-08

摘要: 利用激光熔覆技术在液压支架立柱母材27SiMn钢表面进行了不同激光功率的单道激光熔覆304不锈钢试验,选择出熔覆层质量最佳时的激光功率,并在该功率下进行多层累加激光熔覆304不锈钢试验。分析了熔覆层材料的显微组织,对比分析了27SiMn钢基体和304不锈钢熔覆层的拉伸性能和断口形貌。结果表明,熔覆层和基体之间实现了良好的冶金结合,熔覆层材料中呈现出了具有典型定向凝固特征的柱状晶;熔覆层材料的抗拉强度与基体相当,伸长率明显高于基体;熔覆层和基体材料的拉伸断口处均出现了具有典型塑性断裂特征的韧窝,且熔覆层材料的韧窝尺寸及深度明显大于基体材料。

关键词: 27SiMn钢, 304不锈钢, 激光熔覆, 显微组织, 拉伸性能, 断口形貌

Abstract: After finding the best laser power for 304 stainless steel laser cladding on 27SiMn steel surface by single laser cladding experiments under different laser power, multilayer accumulative 304 stainless steel laser clad layer was prepared by using such a power, and its microstructure was analyzed. The tensile properties and fracture morphology of the 27SiMn steel and the 304 stainless steel clad layer were compared. The results show that a good metallurgical bond is achieved between the clad layer and the substrate, and columnar crystals with typical directional solidification characteristics are present in the clad layer. The tensile strength of the clad layer is equal to that of the substrate, while the elongation is obviously higher than that of the substrate. The dimples with typical plastic fracture characteristics appear at the tensile fracture of both the clad layer and the substrate material, and the size and depth of the dimples of the clad layer are obviously larger than that of the substrate.

Key words: 27SiMn steel, 304 stainless steel, laser cladding, microstructure, tensile properties, fracture morphology

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