材料工程2017，Vol.45Issue(3)：88-94,7.DOI:10.11868/j.issn.1001-4381.2015.001454
SiC含量对激光熔覆SiC/Ni60A复合涂层显微组织和耐磨性能的影响
Effect of SiC Content on Microstructure and Wear Resistance of Laser Cladding SiC/Ni60A Composite Coating
摘要
Abstract
The SiC reinforced Ni60A alloy laser cladding coating on the 45 steel substrate was fabricated with the LDM2500-60 semiconductor laser equipment.The effect of SiC content on microstructure,dilution rate,wear resistance,friction coefficient and microhardness was investigated systematically.The results show that with the increase of SiC content,the microstructure of upper coating is refined obviously,the dilution rate,wear resistance,friction coefficient and microhardness increase firstly and then decrease;when the mass fraction of SiC is 20 ％,the wear resistance of the cladding coating is the best one,in which the wear loss of coating is only 0.0012g and is 1/36.3 of the matrix;the minimum friction coefficient is 0.464,the friction process is the most stable;the highest microhardness of the cladding coating is 1039.9HV0.2,which is 3.5 times of the substrate;but when the mass fraction of SiC is 25％,the microhardness and wear resistance of coating decrease.关键词
激光熔覆/SiC/显微组织/显微硬度/耐磨性能Key words
laser cladding/SiC/microstructure/microhardness/wear resistance分类
矿业与冶金引用本文复制引用
赵龙志,刘武,刘德佳,赵明娟,张坚..SiC含量对激光熔覆SiC/Ni60A复合涂层显微组织和耐磨性能的影响[J].材料工程,2017,45(3):88-94,7.基金项目
国家自然科学基金资助项目(51465019,51265014) （51465019,51265014）
江西省科技厅科研项目(20142BDH80004,20151BAB206044) （20142BDH80004,20151BAB206044）
江西省教育厅科研项目(KJLD14040,GJJ12691) （KJLD14040,GJJ12691）
