金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 92-98.DOI: 10.13251/j.issn.0254-6051.2025.09.014

• 组织与性能 • 上一篇    下一篇

不锈钢熔覆层的微观组织和腐蚀磨损性能

吉效科1, 毛勇1, 李茂1, 张丛笑2, 见飞龙1, 庄磊1, 王玮晨1, 刘二勇2   

  1. 1.中国石油长庆油田公司 机械制造总厂, 陕西 西安 710200;
    2.西安科技大学 材料科学与工程学院, 陕西 西安 710054
  • 收稿日期:2025-05-02 修回日期:2025-06-10 出版日期:2025-09-25 发布日期:2025-10-13
  • 通讯作者: 刘二勇,副教授,博士,E-mail: liueryong@xust.edu.cn
  • 作者简介:吉效科(1976—),男,高级工程师,博士,主要研究方向为油气田设备管理与技术/装备研发与制造、装备再制造等专业领域的管理与技术,E-mail: jxk_cg@petrochina.com.cn。
  • 基金资助:
    中国石油天然气集团有限公司科技项目专题(2023DQ0108-23)

Microstructure and corrosion-wear property of stainless-steel cladding coating

Ji Xiaoke1, Mao Yong1, Li Mao1, Zhang Congxiao2, Jian Feilong1, Zhuang Lei1, Wang Weichen1, Liu Eryong2   

  1. 1. Machine Manufacture Plant, Changqing Oilfield Company, CNPC, Xi'an Shaanxi 710200, China;
    2. School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an Shaanxi 710054, China
  • Received:2025-05-02 Revised:2025-06-10 Online:2025-09-25 Published:2025-10-13

摘要: 以马氏体(M)、铁素体(F)和奥氏体(A)不锈钢熔覆层为研究对象,分析不同不锈钢熔覆层的微观组织,考察了干摩擦、润滑油和含0.3%甲酸润滑油环境下不锈钢熔覆层的腐蚀磨损性能。结果表明:利用激光熔覆技术成功制备了组织致密、无裂纹和气孔等缺陷的M、F和A不锈钢熔覆层,其微观组织沿熔合线到表面呈平面晶体向柱状晶和等轴晶形态过渡。其次,M熔覆层具有更高的硬度,而超低碳F熔覆层则表现出更为优异的甲酸溶液耐点蚀腐蚀特性。在干摩擦和润滑油工况中,具有高硬度的M熔覆层表现出优异的摩擦磨损性能,磨损机理以磨粒磨损为主。在腐蚀性的0.3%甲酸润滑油工况中,具有优异耐蚀性的F铁素体熔覆层则具有最为优异的腐蚀磨损性能,而A熔覆层和M熔覆层则因腐蚀加剧了磨损损伤。

关键词: 不锈钢熔覆层, 微观组织, 硬度, 腐蚀, 腐蚀磨损

Abstract: Microstructure of martensite(M), ferrite(F), and austenite(A) stainless steel cladding coatings was analyzed, and the corrosion-wear property of stainless-steel cladding coating under dry friction, lubricating oil, and 0.3% formic acid-containing lubricating oil environmental characteristics was examined. The results indicate that the M, F, and A stainless steel cladding coating with dense microstructure and free from defects such as cracks and pores were successfully prepared by laser cladding technology, and the microstructure is observed to transition from planar crystals to dendritic columnar crystals and equiaxed crystal morphology along the fusion line to the surface. Secondly, higher hardness is possessed by the martensite-dominated cladding layer, while more excellent resistance to pitting corrosion in formic acid solution is exhibited by the ultra-low carbon F cladding layer. Under dry friction and lubricating oil conditions, excellent friction-wear property is demonstrated by the M cladding layer with high hardness, and the wear mechanism is dominated by abrasive wear. In the corrosive 0.3% formic acid-containing lubricating oil condition, the most outstanding corrosion-wear property is possessed by the F cladding layer with excellent corrosion resistance, while aggravated wear damage due to corrosion is experienced by the A and M cladding coatings.

Key words: stainless steel cladding coating, microstructure, hardness, corrosion, corrosion wear

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