| 摘要: |
| 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FTCFeCSiMn耐磨涂层和高速火焰喷涂工艺制备WC12Co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WC12Co涂层经优化后，硬度1 547 HV0.1，沉积效率34.5%，孔隙率1.0%，粗糙度1.84 μm，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FTCFeCSiMn涂层使工件的抗磨性提高2个数量级，而高速火焰喷涂的WC12Co涂层更使工件的抗磨性提高4个数量级。 |
| 关键词: 电弧喷涂 高速火焰喷涂 单次单因子 试验设计法 磨损 |
| DOI： |
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| Optimization of Thermal Spray Coatings for Forming Tools |
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TILLMANN Wolfgang, LUO Weifeng, BAUMANN Ingor, HOLLINGSWORTH Peter,
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Institute of Materials Engineering, Technical University of Dortmund, Dortmund 44227, Germany
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| Abstract: |
| In order to extend the life time of forming tools, two wear resistance coating systems FTCFeCSiMn and WC12Co were deposited, using arc spraying and HVOF processes respectively. To optimize the parameters, Onefactoratatime experiments were employed for arc spraying process due to its minor influence factors, and design of experiment method was used for HVOF spraying process, which is influenced by more than 10 factors. During the optimization process the micro hardness, porosity, roughness and deposition rate of the coatings were investigated, and the results were excellent. Especially the WC12Co coatings have a hardness of 1 547 HV0.1, a deposition efficiency of 34.5%, a porosity of 1.0%, and a roughness of 1.84 μm. These results are very close to the theoretically expected values. Afterwards, the wear resistances of the coatings were determined by pinondisk tests. The results show that the wear resistance of FTCFeCSiMn coatings is two hundred times higher and corresponds with the wear resistance of WC12Co coatings even sixty thousand times higher than those of the substrates. |
| Key words: arc spray HVOF onefactoratatime design of experiment wear |
