崔陆军,张猛,曹衍龙,曾文涵,郭士锐,李晓磊,郑博.面向泵阀的钴基合金激光熔覆层组织与性能特征[J].表面技术,2019,48(11):333-340.
CUI Lu-jun,ZHANG Meng,CAO Yan-long,ZENG Wen-han,GUO Shi-rui,LI Xiao-lei,ZHENG Bo.Microstructure and Properties of Cobalt Alloy Laser Cladding Layer for Pump Valve[J].Surface Technology,2019,48(11):333-340
面向泵阀的钴基合金激光熔覆层组织与性能特征
Microstructure and Properties of Cobalt Alloy Laser Cladding Layer for Pump Valve
投稿时间:2019-01-26  修订日期:2019-11-20
DOI:10.16490/j.cnki.issn.1001-3660.2019.11.038
中文关键词:  激光熔覆  钴基合金  稀释率  金相组织  显微硬度  盐雾腐蚀
英文关键词:laser cladding  cobalt-based alloy  dilution rate  metallographic structure  microhardness  salt spray corrosion
基金项目:国家自然科学基金资助项目(51505506);中原工学院自主创新应用研究项目(K2018YY001);河南省高等学校重点科研项目(19A460035);广东省科技计划“广东科技特派员项目”(2017A090905003)
作者单位
崔陆军 中原工学院 机电学院,郑州 450007 
张猛 中原工学院 机电学院,郑州 450007 
曹衍龙 中原工学院 机电学院,郑州 450007 
曾文涵 中原工学院 机电学院,郑州 450007 
郭士锐 中原工学院 机电学院,郑州 450007 
李晓磊 中原工学院 机电学院,郑州 450007 
郑博 中原工学院 机电学院,郑州 450007 
AuthorInstitution
CUI Lu-jun School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
ZHANG Meng School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
CAO Yan-long School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
ZENG Wen-han School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
GUO Shi-rui School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
LI Xiao-lei School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
ZHENG Bo School of Mechanical and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China 
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中文摘要:
      目的 改善泵阀密封面质量,延长其使用寿命和提高泵阀使用可靠性。方法 在已做单道涂层预实验基础上,采用大功率光纤耦合半导体激光器于泵阀材料ZG45平板上制备多道钴基合金熔覆层。利用光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、能谱仪(EDS)、显微硬度计、盐雾腐蚀箱等实验测试仪器,分析熔覆层组织形态特征、成分、显微硬度及腐蚀行为,确定多道钴基涂层的工艺参数及性能。结果 多道钴基熔覆层存在可行的工艺参数,熔覆层致密,且与基材形成冶金结合。涂层显微组织主要由柱状晶、胞状晶、柱状树枝晶及枝间共晶组织组成,主要相为γ-Co、Cr23C6。枝晶中心主要由Co和Fe元素组成,其含量从枝晶中心向周围区域递减。枝晶间化合物主要由Cr、C、W元素组成,其含量均匀分布于枝晶间。涂层的平均显微硬度为586.5HV0.3,是基体的2.8倍以上,显微硬度随着稀释率的降低而增加。熔覆层的耐盐雾性能显著提高。结论 基于钴基合金的表面激光熔覆技术可以有效地提高其硬度和耐腐蚀性,可用于泵阀密封面的表面性能强化。
英文摘要:
      The work aims to improve the sealing surface performance of pump valve, thereby expanding its service life and increasing the service reliability of pump valve. Based on the pre-experiment of single-coating, high-power fiber-coupled semiconductor laser was used for preparing multi-channel cobalt-based alloy cladding layer on pump valve material ZG45 plat. By optical morphology (OM), scanning electron microscope (SEM), X-ray diffractometer (XRD), energy dispersive spectroscopy (EDS), microhardness tester, salt spray corrosion chamber and other experimental test instruments, the morphological characteristics, composition, microhardness and corrosion behavior of the cladding layer were analyzed to determine the process parameters and properties of the multi-channel cobalt-based coating. The multi-channel cobalt-based cladding layer had feasible process parameters, dense structure and good metallurgical bonding with the substrate. The coating microstructure was mainly composed of columnar crystal, cell crystal, columnar dendrites and inter-column eutectic structure. The main phases of the cladding layer were γ-Co and Cr23C6. The dendrite center was mainly formed by Co and Fe elements, and the content decreased from the dendrite center to the surrounding area. The interdendritic mainly consisted of Cr, C and W elements, which were evenly distributed in the interdendritic. The average microhardness of the coating was 586.5HV0.3 more than 2.8 times higher than that of substrate and the microhardness of cladding layer increased with the decrease of dilution rate. The salt spray resistance of cladding layer was significantly improved. The surface laser cladding technology based on cobalt-based alloy can effectively improve its hardness and corrosion resistance, and can be used to enhance the performance of sealing surface of pump valve.
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