In the present study, an Ag-Cu-Zn-Cd alloy was utilized as filler metal in order to braze the cemented carbide/Cr-Mn steel joints, and the effects of brazing time and filler metal thickness on the resultant joints were investigated. The observations showed that by the increment of the holding time, the Cu-Zn (s.s) phase grows and causes the shear strength to increase. With increasing the brazing time from 5 min to 15 min (at 780 °C), the contact angle of wetting reduced from ~40° to ~ 35.5°, and the shear strength increased from ~72.5 MPa to ~93.5 MPa. The evaluation of the fracture surfaces demonstrated the presence of dimple-like morphologies for the bond made at 15 min. The results also indicated that an increase in the interlayer thickness from 60 µm to 160 µm leads to a reduction in the strength.

在本研究中，Ag-Cu-Zn-Cd合金用作钎焊硬质合金/ Cr-Mn钢接头的钎料，并研究了钎焊时间和钎料厚度对所得接头的影响。观察结果表明，随着保温时间的增加，Cu-Zn（ss）相生长并导致剪切强度增加。随着钎焊时间从5分钟增加到15分钟（在780°C下），润湿的接触角从〜40°减小到〜35.5°，剪切强度从〜72.5 MPa增加到〜93.5 MPa。断裂表面的评估表明，在15分钟时所形成的粘结存在凹痕状形态。结果还表明，将中间层厚度从60μm增加到160μm会导致强度降低。