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Diffusion bonding of hardmetal and titanium alloy
Author(s): WANG Yan-fang
Journal: WELDING TECHNOLOGY, Year 2007 , Issue 5 , Page 11-13
Keyword:  真空扩散连接硬质合金钛合金中间相;
Abstract: 通过对硬质合金(YG8)与钛合金(TA15)异种材料焊接工艺问题的分析,采用塑性较好的Cu作为中间层来缓解TA15/YG8的接头热应力.在焊接温度为860 ℃,压力为5MPa,扩散焊接时间分别为10,20,30,50,50 min的条件下,研究YG8与TA15的扩散焊工艺,分析了YG8与TA15连接界面的原子扩散机制、反应相生成及其分布规律.结果表明,YG8/Cu界面呈一条亮线,结合良好,而TA15/Cu界面由于生成层状分布的脆性金属间化合物而出现裂纹,剪切试验时接头也是在此界面断开.在扩散焊接时间为60 min时接头抗剪强度达到116 MPa,为硬质合金与钛合金复合构件的生产应用提供了理论研究基础.
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