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Microstructure and properties of Inconel 625 + WC composite coatings prepared by laser cladding
Rare Metals ( IF 8.8 ) Pub Date : 2020-08-04 , DOI: 10.1007/s12598-020-01507-0 Zhi-Hua Tian , Yong-Tao Zhao , Ya-Jun Jiang , Hui-Ping Ren
Rare Metals ( IF 8.8 ) Pub Date : 2020-08-04 , DOI: 10.1007/s12598-020-01507-0 Zhi-Hua Tian , Yong-Tao Zhao , Ya-Jun Jiang , Hui-Ping Ren
Inconel 625 + WC composite coatings were prepared on the surface of 2Cr13 steel by laser cladding. The microstructure, microhardness and corrosion resistance of the composite coatings with different WC contents were investigated in detail. The results show that the phase compositions of the composite coatings are mainly γ-(Ni, Fe) and various carbides. The content of WC has a significant effect on the microstructure of the cladding layers. When the WC content is 10 wt% and 15 wt%, the cladding layer has developed columnar dendrites. However, the 20 wt% WC coating is mainly composed of cellular dendrites and columnar dendrites. With the increase in WC content, the average hardness of the composite coating gradually increases. The average hardness of 20 wt% WC coating is the highest (HV1 536.98), which is a factor of 2.64 greater than that of the 2Cr13 steel matrix. Electrochemical results show that all the composite coatings have better corrosion resistance than 2Cr13 steel in 0.5 mol·L−1 HCl solution. The composite coating with 10 wt% WC has the best corrosion resistance, its corrosion potential (Ecorr) is 0.78806 V higher than that of 2Cr13 steel, and the corrosion current density (Icorr) is only 0.86% that of 2Cr13 steel.
中文翻译:
激光熔覆制备Inconel 625+WC复合涂层的组织与性能
采用激光熔覆在2Cr13钢表面制备Inconel 625+WC复合涂层。详细研究了不同WC含量复合涂层的显微组织、显微硬度和耐腐蚀性能。结果表明,复合涂层的相组成主要为γ-(Ni、Fe)和各种碳化物。WC的含量对熔覆层的微观结构有显着影响。当WC含量为10wt%和15wt%时,熔覆层已发育柱状枝晶。然而,20 wt% WC 涂层主要由蜂窝状枝晶和柱状枝晶组成。随着WC含量的增加,复合涂层的平均硬度逐渐增加。20 wt% WC涂层的平均硬度最高(HV1 536.98),是2倍。64 大于 2Cr13 钢基体。电化学结果表明,所有复合涂层在0.5 mol·L-1 HCl溶液中的耐蚀性均优于2Cr13钢。含10 wt% WC的复合涂层耐腐蚀性能最好,其腐蚀电位(Ecorr)比2Cr13钢高0.78806 V,腐蚀电流密度(Icorr)仅为2Cr13钢的0.86%。
更新日期:2020-08-04
中文翻译:
激光熔覆制备Inconel 625+WC复合涂层的组织与性能
采用激光熔覆在2Cr13钢表面制备Inconel 625+WC复合涂层。详细研究了不同WC含量复合涂层的显微组织、显微硬度和耐腐蚀性能。结果表明,复合涂层的相组成主要为γ-(Ni、Fe)和各种碳化物。WC的含量对熔覆层的微观结构有显着影响。当WC含量为10wt%和15wt%时,熔覆层已发育柱状枝晶。然而,20 wt% WC 涂层主要由蜂窝状枝晶和柱状枝晶组成。随着WC含量的增加,复合涂层的平均硬度逐渐增加。20 wt% WC涂层的平均硬度最高(HV1 536.98),是2倍。64 大于 2Cr13 钢基体。电化学结果表明,所有复合涂层在0.5 mol·L-1 HCl溶液中的耐蚀性均优于2Cr13钢。含10 wt% WC的复合涂层耐腐蚀性能最好,其腐蚀电位(Ecorr)比2Cr13钢高0.78806 V,腐蚀电流密度(Icorr)仅为2Cr13钢的0.86%。