硬质合金与钢的热等静压扩散连接

HIP Diffusion Bonding of Cemented Carbide to Steel

摘要:

研究了硬质合金ＹＧ１５Ｃ与４５~＃碳钢的热等静压扩散连接工艺，探讨厂连接温度、压力、保温保压时间、中间夹层及其厚度和连接残余热应力等对接合强度的影响．结果表明：热等静压扩散连接强度强烈依赖于连接温度，受控于连接后因ＹＧ１５Ｃ与４５~＃钢热膨胀失配而产生的残余热应力。采用镍箔作中间夹层可有效地减小残余热应力对连接的影响，显著提高接合强度．

Abstract:

he technology of the HIP diffusion bonding of YG 15C cemented carbide to 45# carbon steel has been studied. The effects of bonding temperature. pressure time.interlayer and its thickness. residual thermal stress on bonding strength have been researched. The results show that: In the HIP diffusion bonding of YG 15C to 45# carbon steel, the bonding strength depends on bonding temperature strongly and is controlled by the residual thermal stress d ne to the therm al expansion mismatch after honding. By using N i asinterlayer, the effect of residual thermal stress on bonding can be diminished effectively sothat the bonding strength can be improved apparently.