Cr30钢表面镍包WC增强铁基合金涂层的微观组织和耐磨耐蚀性能研究
Microstructure,Wear and Corrosion Resistance Properties of Nickel-Coated WC Enhanced Iron-Based Alloy Coatings on Surface of Cr30 steel
汤联生 1连应华 1林星 1郭岩2
作者信息
- 1. 福建华电可门发电有限公司,福建 连江 350512
- 2. 华电电力科学研究院有限公司,浙江 杭州 310030
- 折叠
摘要
为改善Cr30钢表面的耐冲蚀磨损性能以及耐硫酸、盐酸腐蚀性能,以铁合金粉和镍包WC颗粒的混合物为原料,采用激光熔覆技术在Cr30钢表面制备含镍包WC铁基合金涂层,研究了原料中镍包WC质量分数(10％～30％)对铁基合金涂层的显微组织、物相组成、显微硬度、耐冲蚀磨损性能、耐硫酸和盐酸腐蚀性能的影响.结果表明:不含镍包WC的铁基合金涂层物相为FeCr固溶体和Cr23C6;含10％和20％镍包WC的铁基合金涂层物相为FeCr固溶体、Cr23C6和Fe3W3C;随着镍包WC含量增至30％,铁基合金涂层中析出了新的碳化物Fe6W6C,含30％镍包WC的铁基合金涂层物相为FeCr固溶体、Cr23C6、Fe3W3C和Fe6W6C.随着镍包WC含量的增加,铁基合金涂层的显微硬度、耐冲蚀磨损和耐硫酸、盐酸腐蚀性能提高,当镍包WC质量分数为30％时,铁基合金涂层的组织致密、细化效果最明显,涂层的硬度最高,达到786 HV0.5;30％镍包WC的铁基合金涂层的耐冲蚀磨损、耐硫酸和盐酸腐蚀性能最佳.
Abstract
In order to improve the erosion and wear resistance of Cr30 steel surface and its corrosion resistance to sulfuric acid and hydrochloric acid,a nickel-coated WC iron-based alloy coating was prepared on the surface of Cr30 steel by laser cladding technology with using a mixture of ferroalloy powder and nickel-coated WC particles as raw materials.The effects of the mass fraction of nickel-coated WC(10％～30％) in the raw material on the microstructure,phase composition,microhardness,erosion and wear resistance,and sulfuric acid and hydrochloric acid corrosion resistance of the iron-based alloy coating were studied.Results showed that the phases of the iron-based alloy coating without nickel-coated WC were FeCr solid solution and Cr23C6,while the phases of the iron-based alloy coating containing 10％ and 20％ nickel-coated WC were FeCr solid solution,Cr23C6 and Fe3W3C.As the content of nickel-coated WC increased to 30％,new carbides Fe6W6C were precipitated in the iron-based alloy coating,and the phases of the iron-based alloy coating containing 30％ nickel-coated WC were FeCr solid solution,Cr23C6,Fe3W3C and Fe6W6C.Meanwhile,with the increase of the content of nickel coated WC,the microhardness,erosion wear resistance and sulfuric acid and hydrochloric acid corrosion resistance of iron-based alloy coating were improved.When the mass fraction of nickel coated WC was 30％,the microstructure of the iron-based alloy coating was dense and the refinement effect was most obvious,and the hardness of the coating was the highest,reaching 786 HV0.5 .In general,the iron-based alloy coating with 30％ nickel-clad WC possessed the best resistance to erosion wear,sulfuric acid and hydrochloric acid corrosion.
关键词
激光熔覆/镍包WC/铁基合金涂层/冲蚀磨损/酸性介质腐蚀Key words
laser cladding/nickel coated WC/iron-based alloy coating/erosion wear/corrosion in acidic media引用本文复制引用
基金项目
中国华电集团有限公司科技项目(CHDKJ22-02-103)
出版年
2024
NETL
NSTL
万方数据