Parameter optimization for tungsten carbide/Ni-based composite coating deposited by plasma transferred arc hardfacing
Parameter optimization for tungsten carbide/Ni-based composite coating deposited by plasma transferred arc hardfacing
复制标题
等离子转移电弧堆焊碳化钨/镍基复合涂层参数优化
DOI：
10.1016/s1003-6326(18)64897-6
复制
发表时间：
2018-12-01
影响因子：
4.5
通讯作者：
Shen, Jun
中科院分区：
文献类型：
--
作者：
Wei, Ying;Wei, Xian-shun;Shen, Jun
采用等离子弧堆焊技术制备了高碳化钨含量的镍基复合涂层（Stelcar 65复合涂层）。采用正交试验法优化了Stelcar 65复合涂层的焊接工艺参数。PTA焊接工艺参数包括焊接电流、送粉速度和焊接速度对碳化钨的降解有显著影响。确定了最佳焊接电流、送粉速率和焊接速度分别为100 A、25 g/min和40 mm/min。制备的WC/Ni基复合涂层无裂纹和失效。进一步分析了沉积层的显微组织，以及优化涂层的显微组织和显微硬度。
Ni-based composite coatings with a high content of tungsten carbides (Stelcar 65 composite coatings) were synthesized by plasma transferred arc (PTA) hardfacing. The welding parameters of Stelcar 65 composite coatings were optimized by orthogonal tests. The PTA welding parameters including welding current, powder feed rate and welding speed have significant influence on the tungsten carbide degradation. The values for the optimum welding current, powder feed rate and welding speed were determined to be 100 A, 25 g/min and 40 mm/min, respectively. The produced WC/Ni-based composite coatings were crack- and degradation-free. The microstructure of deposited layers, as well as the microstructure and microhardness of the optimal coating were further analyzed.