徐州工程学院学报（自然科学版）2024，Vol.39Issue(4)：48-54,7.
焊接热输入对TIG-CO2复合焊组织和性能影响
The Effect of Welding Heat Input on the Structure and Properties of TIG-CO2 Composite Welding
摘要
Abstract
TIG-CO2 composite welding technology is used to prepare Fe-Cr-C-B overlay layer on the surface of Q235 steel,and the changes in the structure and properties of composite welded overlay layer are studied under different welding heat inputs.The findings indicate that the weld seam of the cladding layer exhibits a robust metallurgical bond with the base material across a range of welding heat inputs,demonstrating effective fusion at the interface and an absence of significant welding defects such as porosity and cracks.The cladding layer structure is composed of dendritic martensite and cemented carbide phases.As the heat input is increased,a significant number of superheated Weinstein structure are formed in the coarse crystalline region of the heat-affected zone.Additionally,the grain size of the various parts of the cladding layer region increases.The utilization of TIG-CO2 composite welding technology for the purpose of affixing a layer of Fe-Cr-C-B cladding to a surface resulted in a notable enhancement in the hardness and wear resistance of the cladding layer.The hardness of the cladding layer reached a maximum of 55 HRC when the CO2 welding current is 120 A.The wear loss is 0.051 5 g,indicative of the layer's commendable wear resistance.关键词
复合焊/显微组织/硬度/耐磨性Key words
composite welding/microstructure/hardness/wear resistance分类
矿业与冶金引用本文复制引用
谢玉伦,黄自成,王昆,汪奇..焊接热输入对TIG-CO2复合焊组织和性能影响[J].徐州工程学院学报（自然科学版）,2024,39(4):48-54,7.基金项目
安徽省教育厅自然重点项目(2022AH051891) （2022AH051891）
安徽省教育厅省级质量工程项目(2022xsxx092) （2022xsxx092）
