Microstructure and properties of WC-Co/3Cr13 joints brazed using Ni electroplated interlayer

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• 作者：Hongsheng Chen^a ; Keqin Feng^a ; ^{kqfeng@scu.edu.cn} ; Shifeng Wei^a ; Ji Xiong^a ; Zhixing Guo^a ; Hui Wang^b
• 关键词：Ni electroplated interlayer ; Vacuum brazing ; Microstructure ; Cemented carbide ; Austenite
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2012
• 期刊代码：91_02634368
• 类别：et
• 出版时间：July, 2012
• 卷：33
• 期：Complete
• 页码：70-74
• 文件大小：1152 K

摘要

The brazed joints of WC-Co cemented carbide and 3Cr13 stainless steel using Ni electroplated on Cu-Zn alloy as interlayer were investigated. The shear strength of the WC-Co/interlayer/3Cr13 joints increased firstly and then decreased with the increase of brazing temperature or brazing time. The maximum shear strength value of the brazed joints was 154 MPa at 1100 掳C for 10 min. The characterizations of the WC-Co/interlayer/3Cr13 joints were studied by SEM, EDS and XRD. The results showed that the brazed joints fractured in the bulk WC-Co substrates near the interlayer. The added Ni promoted the formation of interdiffusion zone, which possessed positive effects on the bond strength of the WC-Co/interlayer/3Cr13 joints. Austenite solid solution was formed in the WC-Co/interlayer/3Cr13 joint, and the majority of austenite solid solution presented as columnar crystal. The number of austenite crystals on the WC-Co/interlayer interface was tremendously more than that on the interlayer/3Cr13 interface.