焊管2025，Vol.48Issue(12)：49-57,9.DOI:10.19291/j.cnki.1001-3938.2025.12.007
挤压机主轴等离子熔覆层强化工艺及组织性能研究
Research on Strengthening Process,Microstructure and Properties of Plasma Cladding Wear-resistant Coating on Spindle Surface for Extruders
摘要
Abstract
To improve service life of extruder spindle in special environments,plasma cladding technology was used to prepare a high hardness Fe60 iron-based wear-resistant cladding layer on the surface of the 45#steel spindle material used in extruders.The influence of cladding process on microstructure properties of cladding layer was studied using metallographic microscope,X-ray diffraction and scanning electron microscope.Results show that under the conditions of 100 A cladding current,3.5 L/min central gas flow rate,10 L/min shielding gas flow rate,4.5 L/min powder feeding gas flow rate,15 mm torch height from the workpiece surface,5 g/min powder feeding rate,and 60 mm/min scanning speed,cladding layer achieves maximum aspect ratio and optimal formability.When overlap rate is 40%,cladding layer on spindle surface exhibits excellent forming quality and good formability.Fe60 cladding layer is mainly composed of(Fe,Cr),M7C3,Fe3Si,Cr5B3,and CrB2 phases.Many coarse strips and hexagonal massive structures exist in the middle and upper parts of the cladding layer,which are primary M7C3-type carbides.The bottom of cladding layer consists of clustered coral-like eutectic carbides,and microhardness of cladding layer can reach about 430HV0.1.Research indicates that shaft parts produced under the process conditions exhibit high hardness,excellent wear resistance,and superior formability,demonstrating significant practical application value.关键词
等离子熔覆/Fe60合金粉末/送粉率/搭接率/熔覆层成形性Key words
plasma cladding/Fe60 alloy powder/powder feeding rate/overlap rate/cladding layer formability分类
矿业与冶金引用本文复制引用
贾浩哲,陈帅伟,秦向阳,王毅康,李振兴,冉庆选..挤压机主轴等离子熔覆层强化工艺及组织性能研究[J].焊管,2025,48(12):49-57,9.基金项目
石家庄铁道大学基本科研业务项目"原位加热辅助高硬耐磨轴类零件等离子熔覆再制造修复关键技术研究"(项目编号ZQK202404). （项目编号ZQK202404）
