锻压技术

钴基碳化钨堆焊覆层的制备及耐磨性分析

英文标题：Preparation and wear resistance analysis of surfacing coating for cobalt-based WC

作者：周艳霞洪峰王华君李爱农

单位：1.湖北水利水电职业技术学院机电工程系 2.武汉理工大学现代汽车零部件技术湖北省重点实验室 3.武汉理工大学汽车零部件技术湖北省协同创新中心 4.武汉理工大学材料科学与工程学院

关键词：热锻模具堆焊碳化钨磨损钴基

分类号：TG316

出版年,卷(期):页码：2019,44(10):152-156

摘要：

为了探究钴基碳化钨覆层对提高热锻模具的寿命的影响，采用粉末等离子堆焊的方法在热锻模具钢H13基材表面制备了碳化钨增强钴基堆焊层。堆焊层按照增强相碳化钨的含量不同而设计出4种配方并制备出相应的堆焊层。利用金相显微镜和扫描电镜观察、分析堆焊层形貌和组织，并通过EDS分析堆焊层的化学成分；对不同碳化钨含量的钴基堆焊层进行显微硬度、磨损性能的测试，探究碳化钨含量对堆焊层性能的影响。实验结果表明：碳化钨增强钴基堆焊层与基体冶金结合良好，堆焊层较H13钢基体的硬度有较大提高，碳化钨含量为30%时的堆焊层耐磨性最好，其耐磨性较基体提高了10倍。

In order to explore the influence of cobalt-based WC coating on the life of hot forging dies, WC reinforced cobalt-based surfacing coatings were prepared on the surface of base materjal for H13 hot forging die steel by powder plasma surfacing. According to the content of reinforced WC, four kinds of formulas were designed, and the corresponding surfacing coatings were prepared. Then, the surfacing coating morphology and structures were observed and analyzed by optical microscopy and scanning electron microscopy, and the chemical compositions were analyzed by EDS. Furthermore, the microhardness and wear performance of surfacing coating were tested for different contents of WC, and the influence of WC contents on the surfacing coating performance was explored. The results show that WC reinforced cobalt-based surfacing coatings and the matrix metallurgical combination is well, and the hardness of surfacing coating is improved greatly compared to that of H13 steel matrix. Thus, the surfacing coating with WC content of 30% gets the best wear resistance performance which is 10 times wear resistance than that of the matrix.

基金项目：

国家自然科学基金资助项目 (51475346)

作者简介：周艳霞（1981-），女，硕士，讲师 E-mail：247441860@qq.com 通讯作者：洪峰（1981-），男，硕士，讲师 E-mail：hongf@whut.edu.cn

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