摘要
针对矿用液压支架立柱表面修复问题,利用新工艺激光-电复合熔覆丝材修复方法进行工艺研究,设置熔覆速度为30mm/s、40mm/s、50mm/s、60mm/s、70mm/s、80mm/s来研究熔覆速度对熔覆层组织结构、硬度以及耐磨损性能的影响。分别使用金相显微镜和钨灯丝电子扫描显微镜进行显微组织分析,采用显微硬度计测量其熔覆层结合面到顶部的硬度,采用往复式摩擦磨损试验机对其耐磨损性能进行分析。试验表明,随着熔覆速度的增加,熔覆层与基体接触面波浪状纹路变浅,熔覆层厚度稳定在1300mm,熔覆层单道与单道之间夹杂的基体组织逐渐减少,熔覆层微观组织从熔覆层底部到顶部依次为柱状晶、混乱的等轴晶和树枝等轴晶,熔覆层硬度逐渐降低,摩擦系数先减小后增大,在熔覆速度为80mm/s时摩擦量最大,磨损形式主要为疲劳剥落。
The study investigates the application of a novel laser-resistant composite cladding wire material repair method for addressing column surface damage in mining hydraulic support systems.The effect of cladding speed(ranging from 30mm/s to 80mm/s)on the microstructure,hardness,and wear resistance of the cladding layer was systematically examined.Metallographic and scanning electron microscopes were utilized to analyze the microstructure,while a microhardness tester was employed to measure hardness across the cladding layer.Wear resistance was assessed using a reciprocating friction and wear testing machine.Experiments show that an increase in cladding speed results in a reduction of waviness at the cladding layer-substrate interface,stabilization of cladding layer thickness at 1300mm,decreased mixing between layers,and a transition in microstructure from columnar to chaotic isometric crystal formations.Furthermore,hardness decreases as friction coefficient initially rises and subsequently declines.Notably,at a cladding speed of 80mm/s,the highest friction and fatigue spalling were observed.
作者
杨文选
吕燕
郭雅琪
饶容荣
赵璐
Yang Wenxuan;LüYan;Guo Yaqi;Rao Rongrong;Zhao Lu(Xi′an Siyuan University,Xi′an 710038,Shaanxi,China;College of Mechanical Engineering,Xi′an University of Science and Technology,Xi′an 710054,Shaanxi,China;Engineering Research Center on addictive on Manufacturing Technology and application in Universities of Shaanxi province,Xi′an Siyuan University,Xi′an 710038,Shaanxi,China)
出处
《应用激光》
CSCD
北大核心
2024年第2期27-33,共7页
Applied Laser
基金
西安思源学院校级科研项目(XASYYB-B2308)
陕西省教育厅自然科技专项(23JK0617)
陕西省科技厅自然科学基础研究计划青年基金(2022JQ-713)。
关键词
激光电复合
丝材
摩擦磨损
630不锈钢
laser-electric composite
wire
friction and wear
630stainless steel
