摘要
探讨了在铬青铜超塑变形条件下实现铬青铜与钨合金固相焊接的可行性及影响因素 ,试验表明 ,将铬青铜与钨合金试样待焊表面认真清洗后对接 ,并施加 10～30MPa的预应力 ,然后在 740～ 80 0℃、初始应变速率 (1.6 7～ 13 .3)× 10 -4 s-1变形条件下恒温压接 3～ 10min即可实现接头剪切强度达铜基母材强度的固相焊接。焊接过程中铬青铜发生了超塑性流变 ,钨合金变形甚微 。
The feasibility of solid-phase welding between chromium bronze and wolfram alloy was explored under the condition of superplastic deformation of chromium bronze. The results show when the sample surfaces of chromium bronze and wolfram alloy to be welded were carefully cleaned, pre-pressed under 10 [similar to] 30 MPa. at the welding temperature of 740 [similar to] 800 °C and at initial strain rate of (1.67 [similar to] 13.3) × 10-4s-1, the shear strength of butt joint is up to or close to that of chromium bronze base metal in 3 [similar to] 10 minutes pressure welding, so that the solid-phase welding can be finished. The chromiumbronze takes place superplastic deformation in welding process, but the deformation of wolfram alloy is little. The atoms of two sides at initial interface appears obvious diffusion.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2001年第2期15-18,共4页
Transactions of The China Welding Institution
基金
河南省科技攻关项目! (991110 115 )
关键词
铬青铜
钨合金
超塑变形
固相焊接
真空扩散焊
chromium bronze
wolfram alloy
superplastic deformation
solid phase welding
