H13钢表面电子束与电刷镀复合处理及性能研究

发布时间：2018-04-25 07:24

本文选题：H13模具钢 + 刷镀镍　；参考：《重庆理工大学》2016年硕士论文

【摘要】：热作模具钢H13(4Cr5MoSiV1)在承受较大的冲击载荷、剧烈的摩擦或者剧烈的冷热循环引起的热应力、工作温度过高引起的高温氧化等时,会出现裂纹、龟裂、塌陷、磨损、氧化等失效形式。同时,热作模具在锻轧冷却环节中析出的二次碳化物也会直接影响模具的性能。模具钢的失效等均是从其表面开始的。因此为了提高H13模具钢的表面性能,解决其早期失效问题,本文进行了表面性能改进实验研究。本文对H13模具钢分别采用了四种不同的表面处理:电子束处理、刷镀快速镍后进行电子束处理、电子束处理后回火,以及刷镀快速镍后进行电子束处理和回火处理。对不同工艺处理后的H13模具钢,分别进行了粗糙度测试;利用SEM和XRD分别进行样品表面、截面形貌观察和物相分析;对表面改性层的硬度、耐磨性、耐蚀性等进行了测试。实验结果表明:H13模具钢刷镀快速镍后,再进行电子束处理,其硬度、粗糙度、耐磨性、耐蚀性均得到了提高。处理后的H13模具钢工作面,由于基体和镍产生的铁镍化合物,使表面的耐磨与抗蚀性能提升了一倍。同时,处理后的H13钢模具表面易于脱模,减少了模具表面龟裂的产生,从而提高了模具表面的寿命。因此,H13模具钢表面刷镀快速镍后,再进行电子束处理工艺用于生产实践,可以带来较大的经济效益。
[Abstract]:When the hot work die steel H134Cr5MoSiV1) withstands the big impact load, the intense friction or the intense cold and hot cycle causes the thermal stress, the high temperature causes the high temperature oxidation and so on, will appear the crack, the crack, the collapse, the wear, the oxidation and so on failure form. At the same time, the secondary carbides precipitated in the forging and rolling cooling process also directly affect the properties of the die. The failure of die steel starts from its surface. Therefore, in order to improve the surface properties of H13 die steel and solve its early failure problem, the surface properties of H13 die steel have been studied experimentally. In this paper, four different surface treatments were used for H13 die steel: electron beam treatment, electron beam treatment after brushing rapid nickel plating, tempering after electron beam treatment, and electron beam treatment and tempering treatment after brushing rapid nickel plating. The roughness of H13 die steel treated with different processes was tested, the surface, cross-section morphology and phase analysis of samples were observed by SEM and XRD, and the hardness, wear resistance and corrosion resistance of the surface modified layer were tested. The experimental results show that the hardness, roughness, wear resistance and corrosion resistance of the steel after brush-plating and electron beam treatment have been improved. The surface wear resistance and corrosion resistance of the treated H13 die steel face are doubled due to the iron-nickel compounds produced by the matrix and nickel. At the same time, the treated H13 steel die surface is easy to be demoulded, thus reducing the appearance of die surface crack, thus prolonging the die surface life. Therefore, electron beam treatment after brushing rapid nickel plating on the surface of H13 die steel can bring great economic benefits.
【学位授予单位】：重庆理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG174.4

【相似文献】