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为了提高冲压模具的使用寿命,分别采用电弧喷涂工艺制备FTC-FeCSiMn耐磨涂层和高速火焰喷涂工艺制备WC-12Co耐磨涂层,并对其参数进行优化。由于电弧喷涂工艺受到较少参数的影响,而高速火焰喷涂工艺受到煤油流量、氢气流量和氧气比等十几个参数的影响,所以优化过程采用单次单因子法的试验设计法。对微硬度、孔隙率、表面粗糙度及沉积效率等涂层性质进行研究,取得较好效果。其中高速火焰喷涂的WC-12Co涂层经优化后,硬度1 547HV0.1,沉积效率34.5%,孔隙率1.0%,粗糙度1.84μm,与理论预期值非常接近。最后使用销盘试验测试涂层耐磨性,结果表明电弧喷涂的FTC-FeCSiMn涂层使工件的抗磨性提高2个数量级,而高速火焰喷涂的WC-12Co涂层更使工件的抗磨性提高4个数量级。
In order to improve the service life of stamping dies, WC-12Co wear-resistant coatings were prepared by arc spraying process and wear-resistant coatings of FTC-FeCSiMn and high-speed flame spraying process, respectively, and their parameters were optimized. The arc spraying process is affected by less parameters, while the high-speed flame spraying process is affected by more than a dozen parameters such as kerosene flow rate, hydrogen flow rate and oxygen ratio, so the optimization process uses the single-factor test design method. The microhardness, porosity, surface roughness and deposition efficiency of the coating properties such as research, and achieved good results. The high-speed flame sprayed WC-12Co coating has been optimized to have a hardness of 1547HV0.1, a deposition efficiency of 34.5%, a porosity of 1.0% and a roughness of 1.84μm, which are in close agreement with the theoretical expectation. Finally, the pin-plate test was used to test the wear resistance of the coating. The results showed that the arc-sprayed FTC-FeCSiMn coating increased the wear resistance of the workpiece by two orders of magnitude, while the high-speed flame sprayed WC-12Co coating made the workpiece wear resistance Increase by 4 orders of magnitude.