【作者】 刘新文；

【导师】 姚建华；

【作者基本信息】 浙江工业大学 ， 机械工程， 2005， 硕士

【摘要】 轴类部件的磨损失效是现代工业生产中常遇到的问题。巨化集团公司电化厂用于生产偏二氯乙烯（VDC）单体装置中的皂化泵不锈钢泵轴的磨损破坏,会带来较大的经济损失与危害。同时,这些轴大都价格较昂贵,且检修更换泵轴也较麻烦,影响了装置的正常运行,因此提高轴件局部表面的耐磨性能,延长其使用寿命是当务之急。本文从不锈钢轴件的磨损失效机理出发,研究轴件与高能量密度的CO₂激光的相互作用,通过对激光合金化的合金化材料和工艺参数进行优化设计,提高不锈钢轴件表面的硬度,提高其耐磨性。影响激光合金化宏观和微观质量的因素很多,本文重点研究了预涂合金层厚度、大面积合金化搭接率等对合金化质量的影响,通过显微硬度测试、金相显微组织观察、能谱分析以及磨损对比试验、耐腐蚀试验对合金化质量进行定性、定量分析,从而确定出最佳的激光合金化工艺参数,达到显著提高不锈钢轴件表面耐磨性的目的。实验结果表明,对不锈钢轴件进行激光合金化处理后,合金化层与基体形成了牢固的冶金结合,工件表面平均硬度由原来的HV191提高到HV820,轴件的耐磨性提高了七倍,装机试验结果表明,经激光强化处理的轴件使用寿命初步估计至少提高了三倍以上,经济效益明显。更多还原

【Abstract】 The wear failure of axes is often occurred in modern industry production. The wear-out failure of stainless steel soap pump shaft, used in monomer installation producing partial dichlorethylene in Juhua Group Co,.Ltd. Electrization Factory, will cause dramatic economic losses and danger. At the same time, the price of the axes is very high, and the troublesome of replacing pump shaft will influence the equipments’ running, so it is urgent to lengthen its service life. Based on the mechanism of wear failure on stainless steel axes, this paper studied the interaction of axes and high energy density CO₂ laser. Through optimum designing of alloying material and processing parameter during laser alloying, the hardness and wear-resistance of stainless steel were advanced. There are many facets affecting the quality of laser alloying, but this paper emphasized at some main factors such as the thickness of pre-coated alloy, overlapping coefficient, laser power and scanning rate. The qualitative analysis and quantitative analysis on laser alloying quality were performed by microhardness testing, metallographical observation, energy spectrum analysis, wear contrast test and corrosion-resisting test, and then got the optimum processing parameters of laser alloying, finally reached the aim of greatly advancing the wear-resistance of stainless steel axes. The result showed that after laser alloying on stainless steel, a solid metallurgy bonding was formed between alloying layer and matrix, the surface hardness increased from original HV191 to HV820, and the wear-resistance of axes was advanced over seven times. The field test result showed that the service life of axes after更多还原