液压支架立柱材料27SiMn钢表面激光熔覆实验研究

发布时间：2018-03-01 11:38

本文关键词： 液压支架立柱激光熔覆工艺参数摩擦磨损　出处：《西安科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：针对液压支架立柱易出现点蚀、磨损等失效形式的问题,以液压支架立柱母材27SiMn钢为对象,采用激光熔覆再制造技术,在27SiMn钢表面进行激光熔覆铁基合金,井对激光熔覆后的试样进行组织及性能分析。通过对液压支架工作原理、立柱失效形式的分析,确定出立柱表面合理的熔覆方案,其中包括熔覆材料、送粉方式、工艺参数及加工环境的确定。使用半导体激光器,在液压支架立柱母材27SiMn钢表面采用控制单一变量法制备铁基合金熔覆层。使用金相显微镜表征了激光熔覆试样的微观组织结构,确定出最佳的激光熔覆实验工艺参数,使用该工艺参数进行多层累加激光熔覆实验,并对所得到熔覆层的微观组织进行分析.使用微机控制电子万能试验机,表征了激光熔覆试样的拉伸性能,目的在于研究分析不同激光工艺参数对熔覆试样拉伸性能的影响规律,确定出熔覆试样拉伸性能最佳的工艺参数,利用上述工艺参数进行多层累加激光熔覆实验,并对所得到熔覆层的拉伸性能进行研究分析通过不同工艺参数下熔覆试样的显微硬度分析,利用较优工艺参数制备的熔覆试样进行摩擦磨损实验,研究转速和施加载荷对熔覆试样耐磨性的影响规律。
[Abstract]:In view of the problem that the hydraulic support column is prone to pitting and wear failure, taking 27SiMn steel as the object, laser cladding and remanufacturing technology is used to cladding iron-base alloy on the surface of 27SiMn steel. By analyzing the working principle of the hydraulic support and the failure form of the pillar, the reasonable cladding scheme on the surface of the pillar, including cladding material and powder feeding method, is determined. Determination of process parameters and processing environment-use of semiconductor lasers, The Fe-base alloy cladding layer was prepared on the surface of 27SiMn steel by controlling a single variable method. The microstructure of laser cladding sample was characterized by metallographic microscope, and the optimum technological parameters of laser cladding experiment were determined. The multi-layer cumulative laser cladding experiment was carried out by using the process parameters, and the microstructure of the cladding layer was analyzed. The tensile properties of the laser cladding samples were characterized by using a microcomputer controlled electronic universal testing machine. The purpose of this paper is to study and analyze the influence of different laser parameters on the tensile properties of cladding specimens, and to determine the best process parameters for the tensile properties of cladding specimens. The tensile properties of the cladding layer were studied and analyzed. The microhardness of the cladding specimen was analyzed under different technological parameters, and the friction and wear experiments were carried out by using the better process parameters. The effects of rotating speed and applied load on wear resistance of cladding samples were studied.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD355.4;TG665

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