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在金刚石工具制造中,人们一直主要使用纯钴作为包缚和粘接金刚石磨粒的胎体材料。由于Co是贵重金属而使生产成本居高不下。针对这种情况,本文提出用国外成本较低的NEXT合金及其添加剂替代纯钴,并用激光焊接成成品做对比实验。首先用LSM240全自动激光焊接机进行焊接,然后对材料力学性能、激光焊接工艺参数、焊缝显微组织和切割实验数据等进行分析。发现:使用NEXT合金后,焊缝气孔率约为8％、强度1800Mpa,胎体材料对金刚石磨粒的包缚力增强,金刚石工具的使用寿命提高了一倍多、同时金刚石容易出刃,锋利度较好。实验表明用NEXT合金代替纯钻有很好的工业应用前景。
In the manufacture of diamond tools, pure cobalt has been predominantly used as the carcass material to bind and bond diamond abrasive particles. As Co is a precious metal and the high cost of production. In response to this situation, this paper proposes to use relatively low cost foreign NEXT alloy and its additives instead of pure cobalt, and laser welding into finished products to do the comparative experiment. Firstly, LSM240 automatic laser welding machine is used for welding, and then the mechanical properties of materials, laser welding process parameters, weld microstructure and cutting experimental data are analyzed. It is found that the porosity of the weld is about 8% and the strength is 1800Mpa after using NEXT alloy. The carcass material has stronger binding force on the diamond abrasive grains, the service life of the diamond tools has more than doubled, and the diamond is easy to cut out. The sharpness better. Experiments show that using NEXT alloy instead of pure diamond has good industrial application prospects.