| Microstructure and bonding strength of WC reinforced Ni-base alloy brazed composite coating | |
| S. P. Lu; O. Y. Kwon | |
| 2002 | |
| Source Publication | Surface & Coatings Technology
 |
| ISSN | 0257-8972 |
| Volume | 153Issue:1Pages:40-48 |
| Abstract | A tungsten carbide (WC) reinforced Ni-Cr-B-Si(Co) composite coating was produced on mild steel by high temperature vacuum brazing. The microstructure, phases present and the interface diffusion have been investigated. The cobalt coated on the surface of WC particles dissolved into the liquid nickel-base alloy but the WC was not decomposed severely during the vacuum brazing process. Microanalysis showed that the composite coating matrix was composed of gamma-Ni solution and gamma-Ni+(Ni,CO)(3)B lamellar eutectic. Diffusion and metallurgical reaction occurred at the WC/NiCrBSi(Co) interface and composite coating/substrate interface. A 6-mum thick brazing seam or interfacial bonding zone was found between the coating and die substrate as the coated sample cooled down. Bonding strengths of the WC/NiCrBSi(Co) interface and the composite coating/substrate interface reached 100-140 MPa and 300-360 MPa, respectively, which are far higher than those of thermal spray coating. The abrasive wear resistance of brazed composite coating also appears to be better than that of the flame overlaid at the same composition. (C) 2002 Elsevier Science B.V. All rights reserved. |
| description.department | inha univ, dept mech engn, inchon 402751, south korea. chinese acad sci, inst met res, shenyang 110015, peoples r china.;kwon, oy (reprint author), inha univ, dept mech engn, 253 yonghyundong, inchon 402751, south korea |
| Keyword | Composite Coating Vacuum Brazing Tungsten Carbide Nickel-base Alloy Lamellar Eutectic Electron Probe Micro-analysis (Epma) Laser |
| URL | 查看原文 |
| WOS ID | WOS:000174795200006 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/36360 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | S. P. Lu,O. Y. Kwon. Microstructure and bonding strength of WC reinforced Ni-base alloy brazed composite coating[J]. Surface & Coatings Technology,2002,153(1):40-48. |
| APA | S. P. Lu,&O. Y. Kwon.(2002).Microstructure and bonding strength of WC reinforced Ni-base alloy brazed composite coating.Surface & Coatings Technology,153(1),40-48. |
| MLA | S. P. Lu,et al."Microstructure and bonding strength of WC reinforced Ni-base alloy brazed composite coating".Surface & Coatings Technology 153.1(2002):40-48. |
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