Tungsten carbide (WC-Co) is a material that is frequently employed in the field of optical mold forming. However, the high hardness of WC-Co presents a challenge in machining. In-situ laser-assisted machining (in-situ LAM) has been demonstrated to yield superior outcomes in the machining of WC-Co. In this study, the effect of temperature increase on the removal mode of brittle-plastic transition of WC-Co materials is investigated by thermally coupled finite element cutting simulations. The damage mechanism evolved from the surface defect formation process of WC-Co in in-situ LAM is revealed. The cobalt content was employed as a point of departure for an investigation into the influence of elevated cobalt content on the mechanical and thermal properties of WC-Co materials, with a specific focus on fracture toughness, hardness, and thermal expansion. The results indicate that elevated cobalt content tends to enhance the surface integrity and processing quality of the processed material. The machining parameters of WC-Co in-situ LAM were optimized using surface roughness as a characteristic value and the optimized surface roughness value was reduced by 45.9%. This study offers theoretical guidance for the optimization of WC-Co in-situ laser-assisted processing factors, providing a reference for practical technical applications.

中文翻译：

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原位激光辅助车削WC-Co损伤机理及表面质量优化实验研究


碳化钨（WC-Co）是光学模具成型领域常用的材料。然而，WC-Co的高硬度给机械加工带来了挑战。原位激光辅助加工（原位 LAM）已被证明可以在 WC-Co 加工中产生优异的结果。本研究通过热耦合有限元切削模拟研究了温度升高对WC-Co材料脆塑性转变去除模式的影响。揭示了原位 LAM 中 WC-Co 表面缺陷形成过程演变而来的损伤机制。以钴含量为出发点，研究钴含量升高对 WC-Co 材料机械和热性能的影响，特别关注断裂韧性、硬度和热膨胀。结果表明，提高钴含量往往会提高加工材料的表面完整性和加工质量。以表面粗糙度为特征值对WC-Co原位LAM加工参数进行优化，优化后的表面粗糙度值降低了45.9%。该研究为WC-Co原位激光辅助加工因素的优化提供了理论指导，为实际技术应用提供了参考。