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目前,激光表面强化是提高钢制刀具和机器零件耐磨性的有效方法。为确定利用激光强化硬质合金表面来改善其使用性能的可能性,进行了试验,确定了激光束照射对硬质合金的显微硬度、应力状态、微观几何学的影响,搞清了可保证抗磨能力和被加工表面质量最佳配合的强化观范。试验了一般尺寸晶粒、细晶粒和超细晶粒的含钴3～20%的BK类硬质合金。激光束照射过程中形成如下缺陷:出现微裂纹,部分表面分层,材料熔化并在表面形成网状微裂纹。因此确定能保证获得无缺陷表
At present, laser surface hardening is an effective way to improve the wear resistance of steel knives and machine parts. In order to determine the possibility of using laser enhanced cemented carbide surface to improve its serviceability, experiments were carried out to determine the effect of laser beam irradiation on the microhardness, stress state and microscopic geometry of cemented carbide, Anti-wear ability and the quality of the surface to be processed the best combination of the concept of enhancement. BK-based cemented carbide containing 3-20% of cobalt was tested on general-sized grains, fine grains and ultra-fine grains. Laser beam irradiation during the formation of the following defects: the emergence of micro-cracks, part of the surface delamination, the material melted and the formation of micro-cracks in the surface. Therefore, it is ensured that a defect-free list can be obtained