液压支架立柱基材27SiMn钢激光熔覆搭接工艺实验探究

Experimental exploration of laser overlap cladding on 27SiMn steel as base material of hydraulic support column

根据矿用液压支架立柱在井下轴向和切向受力及易磨损的工作特点,对矿用液压支架立柱基材27SiMn钢的硬度和耐磨性进行实验探究分析,并利用激光熔覆技术对27SiMn钢表面改性。激光熔覆搭接实验在单道熔覆基础上,熔覆搭接第二道时,基材温度升高,实验条件与单道实验不同。在液压支架立柱基材27SiMn钢表面进行一系列激光单道熔覆实验,对比单道熔覆层厚度、摩擦磨损实验及硬度等检测结果,找到液压支架立柱基材表面搭接实验的合适参数。搭接处硬度高于基材3倍以上,搭接后熔覆层比基材更耐磨,实验结果满足实际加工工序需要,并为激光熔覆在液压支架立柱表面熔覆后加工处理奠定有效实验理论基础。

According to the working characteristics of the axial and tangential force and wear of the pillar of the mine hydraulic support,the hardness and wear resistance of the 27SiMn steel are investigated and analyzed in this paper,and the laser cladding technology is used to modify the surface of the 27SiMn steel.As the laser cladding lap experiment was carried out on the basis of the single channel cladding experiment,the substrate temperature had increased when cladding second channels,and the experimental conditions were slightly different from the single channel experiment.A series of laser single channel cladding experiments were carried out on the 27SiMn steel surface of the base material of the hydraulic column.Compared the test results of the thickness of the single channel cladding layer,the friction and wear experiment and the hardness,the suitable parameters were found on the surface of the base material of the hydraulic prop by 40%lap ratio.The surface characteristics of the lap joint were tested.The hardness of the lap joint was higher than the base.The material is more than 3 times,and the cladding layer is more wearable than the substrate after lap,at the same time,the thickness of the cladding layer is improved effectively.The experimental results meet the needs of the actual processing procedure,and the effective experimental theoretical foundation is laid for the laser cladding after the surface of the hydraulic column.