Grinding Force, Specific Energy and Material Removal Mechanism in Grinding of HVOF-Sprayed WC–Co–Cr Coating
Grinding Force, Specific Energy and Material Removal Mechanism in Grinding of HVOF-Sprayed WC–Co–Cr Coating
复制标题
DOI：
10.1080/10426914.2013.872261
复制
发表时间：
2014-03
影响因子：
4.8
通讯作者：
H. Masoumi;S. M. Safavi;M. Salehi
中科院分区：
文献类型：
--
作者：
H. Masoumi;S. M. Safavi;M. Salehi
采用机械加工方法和其他分析技术，研究了高速火焰喷涂WC-10 Co-4Cr涂层在树脂结合剂金刚石砂轮表面磨削过程中的材料去除行为。研究了磨削力比、比材料去除率、最大未变形切屑厚度和比磨削能等基本磨削因素。采用含有线性项和一阶交互作用的数学模型，研究了磨削参数对磨削力的影响。结果表明，切向磨削力和法向磨削力不仅取决于切削深度、进给量和切削速度，而且还取决于切削深度和进给量的交互作用。磨削表面的扫描电子显微镜（SEM）检查揭示了材料去除的机制，提出了脆性断裂和韧性流动模式。考虑到工艺参数对磨削机理的影响，可以推断，根据磨削参数的变化，与脆性断裂或韧性流动相关联的材料去除机理的部分可以是不同的。此外，SEM照片表明，大量的能量已被消耗的塑性变形，由于犁。
The present study applies the machining approach and other analysis techniques to investigate the material removal behavior during surface grinding of high-velocity oxy-fuel (HVOF) thermally sprayed WC–10Co–4Cr coating using a resin-bonded diamond wheel. The basic grinding factors such as force ratio, specific material removal rate, maximum undeformed chip thickness, and specific grinding energy have been investigated and discussed. The mathematical models containing linear terms and interactions of the first-order have been used to investigate the effect of the grinding parameters on the grinding force. The results have shown that both tangential and normal grinding forces depend not only on the depth of cut, feed rate, and cutting speed, but also on the depth of cut and feed rate interaction. Scanning electron microscopy (SEM) examination of the ground surface has revealed that the mechanism of material removal presents both brittle fracture and ductile flow modes. Considering the effect of the process parameters on the grinding mechanism, it has been inferred that the portion of the material removal mechanism associated with brittle fracture or ductile flow can be different according to the grinding parameters variations. Also, the SEM photographs have shown that large amounts of energy have been expended by plastic deformation due to plowing.