熔覆速度对激光-电复合丝材熔覆630不锈钢熔覆层组织及性能的影响
Effect of Cladding Speed on Microstructure and Properties of 630 Stainless Steel Cladding by Laser-Electric Composite Wire
杨文选 1吕燕 2郭雅琪 2饶容荣 2赵璐3
作者信息
- 1. 西安思源学院,陕西西安 710038;西安科技大学机械工程学院,陕西西安 710054
- 2. 西安思源学院,陕西西安 710038
- 3. 西安思源学院,陕西西安 710038;增材制造技术应用陕西省高校工程研究中心,陕西西安 710038
- 折叠
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30 mm/s、40 mm/s、50 mm/s、60 mm/s、70 mm/s、80 mm/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1 300 mm,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80 mm/s时摩擦量最大,磨损形式主要为疲劳剥落.
Abstract
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.Metallo-graphic and scanning electron microscopes were utilized to analyze the microstructure,while a microhardness tester was em-ployed to measure hardness across the cladding layer.Wear resistance was assessed using a reciprocating friction and wear tes-ting machine.Experiments show that an increase in cladding speed results in a reduction of waviness at the cladding layer-sub-strate interface,stabilization of cladding layer thickness at 1 300 mm,decreased mixing between layers,and a transition in mi-crostructure from columnar to chaotic isometric crystal formations.Furthermore,hardness decreases as friction coefficient ini-tially rises and subsequently declines.Notably,at a cladding speed of 80 mm/s,the highest friction and fatigue spalling were observed.
关键词
激光电复合/丝材/摩擦磨损/630不锈钢Key words
laser-electric composite/wire/friction and wear/630 stainless steel引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据