油气管道37Mn5钢表面激光熔覆CoCrW涂层的组织及腐蚀性能

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摘要采用激光熔覆方法在油气管道37Mn5钢表面制备CoCrW涂层,研究涂层的微观组织和硬度,并采用质量浓度为3.5%的NaCl溶液分别对CoCrW涂层和37Mn5钢进行腐蚀测试。研究结果表明：在CoCrW涂层内形成了γ-Co与部分Cr₇C₃相。涂层和基体间形成具有冶金结合的良好界面。在涂层内形成了取向生长的枝晶,在熔覆组织中形成了分层结构的树枝晶。CoCrW涂层硬度均值为476 HV,与界面相距较近的区域硬度较低。涂层具有比基体更大的容抗弧,具备更优异的耐蚀性能。涂层可以对基体和腐蚀溶液起隔离作用,避免基体组织发生腐蚀。CoCrW涂层比37Mn5钢具有更高腐蚀电位和电阻率,分别为-1.137 V和20 208 Ω∙cm²,拥有比37Mn5钢基体更强的防腐能力。

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	王荣健
	梁金禄
	黄小玉
	石海信

关键词 ：激光熔覆, 37Mn5钢, CoCrW涂层, 显微组织, 腐蚀性能

Abstract：The CoCrW coating was prepared on the surface of 37Mn5 steel in oil and gas pipeline by laser cladding method. The microstructure and hardness of the coating were studied, and the corrosion tests of CoCrW coating and 37Mn5 steel were conducted with 3.5%NaCl solution. The results show that γ-Co and some Cr₇C₃ phases were formed in CoCrW coating. A good interface with metallurgical bonding is formed between the coating and the substrate. Oriented dendrites were formed in the coating and layered dendrites were formed in the cladding structure. The mean hardness of CoCrW coating was 476 HV, and the hardness of CoCrW coating was lower in the area close to the interface. The coating has a larger arc resistance and better corrosion resistance than the substrate. The coating can insulate the matrix from the corrosive solution and avoid the corrosion of the matrix. CoCrW coating has higher corrosion potential and resistance than 37Mn5 steel, which is 1.137 V and 20 208 Ω∙cm² respectively, CoCrW coating has stronger corrosion resistance than 37Mn5 steel.

Key words： laser cladding 37 Mn5 steel CoCrW coating microstructure corrosion performance

收稿日期: 2020-07-10 出版日期: 2021-01-18

ZTFLH:

TG174

基金资助:广西高校中青年教师科研基础能力提升项目(2020KY10028); 北部湾大学高层次人才科研启动项目(2019KYQD46)

通讯作者: 梁金禄,高级工程师。电话：13907778961;E-mail: gugu0323972@126.com

引用本文:

王荣健, 梁金禄, 黄小玉, 石海信. 油气管道37Mn5钢表面激光熔覆CoCrW涂层的组织及腐蚀性能[J]. 粉末冶金材料科学与工程, 2020, 25(6): 475-479.
WANG Rongjian, LIANG Jinlu, HUANG Xiaoyu, SHI Haixin. Microstructure and corrosion properties of laser cladding CoCrW coating on 37Mn5 steel surface of oil and gas pipeline. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 475-479.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2020/V25/I6/475

[1] PAES R M G, SCHEID A. Effect of deposition current on microstructure and properties of CoCrWC alloy PTA coatings[J]. Soldagem & Inspeo, 2014, 19(3): 247-254.
[2] 张东海, 刘睿, 程从前, 等. 拉应力对2205 37Mn5钢耐点蚀性能的影响[J]. 表面技术, 2016, 45(3): 12-16.
ZHANG Donghai, LIU Rui, CHENG Congqian, et al. Effect of tensile stress on pitting resistance of 2205 duplex stainless steel[J]. Surface Technology, 2016, 45(3): 12-16.
[3] HAGHDADI N, CIZEK P, BELADI H, et al.The austenite microstructure evolution in a duplex stainless steel subjected to hot deformation[J]. Philosophical Magazine, 2017, 97(15): 1209-1237.
[4] CHUN E J.Nanostructuring behavior of NiCrBSi and CoCrWC thermal spray coatings formed by temperature-controlled laser heat treatment[J]. Journal of the Korean Institute of Metal and Materials, 2020, 58(4): 247-256.
[5] XU X Y, XU B S, LIU W J, et al.Microstructure and properties of vacuum melting CoCrW coating by brazing foil[J]. Rare Metal Materials and Engineering, 2003, 32(10): 855-858.
[6] SUN S, DURANDET Y, BRANDT M.Parametric investigation of pulsed Nd:YAG laser cladding of stellite 6 on stainless steel[J]. Surface & Coatings Technology, 2005, 194(2): 225-231.
[7] 郭绪镇, 董飞, 李镜银, 等. 37Mn5钢磨损腐蚀的机理及强化途径[J]. 材料开发与应用, 2010, 25(3): 84-87.
GUO Xuzhen, DONG Fei, LI Jingyin, et al. Mechanism of the erosion-corrsion and avenues of improving the erosioncorrsion resistance of the duplex stainless steel[J]. Development and Application of Materials, 2010, 25(3): 84-87.
[8] 李丽, 孙峰, 张尧成. 固溶处理对激光熔覆Stellite 6 合金涂层性能的影响[J]. 表面技术, 2017, 46(1): 78-81.
LI Li, SUN Feng, ZHANG Yaocheng. Effect of solution treatment on the performance of laser cladding Satellite 6 alloy coating[J]. Surface Technology, 2017, 46(1): 78-81.
[9] ZHANG Zhenyu, LU Xinchun, LUO Jianbin.Tribological properties of La₂O₃ and CeO₂ doped CoCrW coatings deposited by supersonic plasma spraying[J]. Chinese Science Bulletin, 2007, 52(23): 3292-3298.
[10] ZHANG Z, LU X, HAN B, et al.Rare earth effect on microstructure, mechanical and tribological properties of CoCrW coatings[J]. Materials Science & Engineering A, 2007, 444(1/2): 92-98.
[11] LIM H, KIM P, JEONG H, et al.Enhancement of abrasion and corrosion resistance of duplex stainless steel by laser shock peening[J]. Journal of Materials Processing Technology, 2012, 212(6): 1347-1354.
[12] 秦承鹏, 郑玉贵. 17-4PH不锈钢表面激光熔覆CoCrW涂层的空蚀行为研究[J]. 腐蚀科学与防护技术, 2011, 23(3): 209- 213.
QIN Chengpeng, ZHENG Yugui. Cavitation erosion behavior of laser cladding cobalt-based alloy coating on 17-4PH stainless steel surface[J]. Corrosion Science and Protection Technology, 2011, 23(3): 209-213.
[13] 朱成才, 张自强, 白海明, 等. 激光熔覆NiTiCCr涂层的耐腐蚀性能研究[J]. 材料保护, 2020, 53(3): 71-77.
ZHU Chengcai, ZHANG Ziqiang, BAI Haiming, et al. Study on corrosion resistance of laser cladding NiTiCCr coating[J]. Material Protection, 202, 53(3): 71-77.
[14] 白杨, 王振华, 左娟娟, 等. 激光熔覆制备Fe基复合涂层及其高温耐蚀行为[J]. 中国激光, 2020, 47(10): 1-12.
BAI Yang, WANG Zhenhua, ZUO Juanjuan, et al. Preparation of Fe matrix composite coating by laser cladding and its corrosion resistance at high temperature[J]. China Laser, 2020, 47(10): 1-12
[15] ARJI R, DWIVEDI D K, GUPTA S R.Sand slurry erosive wear of thermal sprayed coating of stellite[J]. Surface Engineering, 2013, 23(5): 391-397.