Abstract A novel method of fabricating Ni/WC coatings by laser deposition with a tubular cored wire was proposed and the feasibility was demonstrated in this paper. The wire transfer behaviors with different wire-beam distances and processing parameters were observed via a high-speed camera. A process map was developed to elucidate the dependence of wire transfer modes on the different combinations of operating parameters. The effects of process parameters including laser power, scanning speed and wire feed rate on the track characteristics were investigated separately. The wire plunging transfer could be obtained at appropriate parameters when the wire tip was front fed and positioned to the leading region of the molten pool, which producing a continuous coating with minimal dilution, low contact angle, good surface quality and high content of retained ceramic particles.

中文翻译：

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管芯焊丝激光沉积制备Ni/WC复合涂层的可行性研究

摘要 提出了一种管芯焊丝激光沉积制备Ni/WC涂层的新方法，并论证了其可行性。通过高速相机观察不同线束距离和加工参数的线传输行为。开发了一个过程图来阐明电线传输模式对不同操作参数组合的依赖性。分别研究了激光功率、扫描速度和送丝速度等工艺参数对轨迹特性的影响。当焊丝尖端在前进给并定位到熔池的前部区域时，可以在适当的参数下获得焊丝插入转移，从而产生具有最小稀释度、低接触角、低接触角的连续涂层。