激光熔覆液压支架立柱防腐耐磨涂层研究进展

胡红钰, 王跃飞, 严海心, 史建军, 吴多利

Research Progress on Laser Cladding Anti-corrosion and Wear-resistant Coatings for Hydraulic Support Column

HU Hongyu, WANG Yuefei, YAN Haixin, SHI Jianjun, WU Duoli

表2 液压支架防护涂层的应用案例

Table 2 Application examples of protective coatings for hydraulic supports

Substrate Coating material Thickness / μm Hardness Corrosion test method Corrosion test results Electroplating 416 stainless steel Hard chrome[27] 11-194 (Depends on plating time) 900HV 27SiMn Cu-Cr[28] 30-45 800HV Copper accelerated acetic acid salt spray (CASS) Meeting production needs Thermal 45 steel WC10Co4Cr[8] 420-450 (1163.6 ± 12.4)HV300 CASS Rusting after 120 h spraying 27SiMn WC-Cr3C2-M[32] 300-350 951.4HV0.3 CASS No visible corrosion spots after 312 h Hydrogen sulfide No visible corrosion corrosion test spots after 240 h Sulfur dioxide No visible corrosion corrosion test spots after 312 h 27SiMn WC[33] 1200HV[27] Laser cladding 27SiMn Fe-based alloy 500.1HV0.3 powder[35] 27SiMn 316L[36] 1000 400HV0.2 3.5%NaCl electrochemical Ecorr = 0.053 V corrosion Rp = 22.881 Ω·cm² Icorr = 1.018 A/cm² Arc melting 27SiMn Aluminum 200HV0.5 3.5%NaCl electrochemical Ecorr = -0.53 V copper bronze[43] corrosion Dense holes in the surface of the coating CASS Corrosion material after 100 h 27SiMn Aluminum 540HV0.5 3.5%NaCl electrochemical Ecorr = -0.85 V bronze[44] corrosion Aluminum bronze + 550HV0.5 Ecorr = -0.8 V Ni、Mn[44] Aluminum bronze + 550HV0.5 Ecorr = -0.6 V Si[44]