钎焊工艺对WC—Co/NiCrBSi复合涂层性能的影响

THE EFFECT OF BRAZING PARAMETERS ON THE PROPERTIES OF WC-Co/NiCrBSi COMPOSITE COATING

采用真空钎焊技术，在45＃钢基体表面焊一层（WC－Co／NiCrBSi）复合涂层，研究了不同钎焊工艺对涂层自身结合强度、涂层与基体间连接强度以及涂层抗磨料磨损性能的影响．钎焊工艺为1080c×10min时，涂层自身结合强度为146MPa；涂层与基体间的最高连接强度为367MPa．涂层的抗磨料磨损性能比Co－Cr－W堆焊涂层和（WC－Co/NiCrBSi）火焰堆焊层的高．

Using vacuum brazing technology, a(WC-Co/NiCrBSi)composite.coati on 45# steelsurface was made. The efFect of brazing parameters on the abrasive properties and tensile strength ofthe coating were studied. The tensile strength of the coating approaches 146MPa at 1080 ℃ for10min. The maximum strength betWeen coating/matrix is 367MPa. The abrasive property of the(WC-Co/NiCrBSi) composite coating is better than the Co-Cr-W overlaying and(WC-Co/NiCrBSi)flame overlaying.