摘要
研究了变形速率对低合金结构钢３５ＣｒＭｏ摩擦焊接头组织与力学性能的影响。结果表明，增加变形速率可改善焊缝韧性。焊缝韧性改善的机理为近缝区晶粒细化和硬度降低。采用金相法、ＴＥＭ法对近缝区粒状组织精细结构进行了观察，粒状组织小岛是由Ｍ－Ａ组成。指出增加变形速率使近缝区金属强化机制为位错强化、一定数量的岛状第二相强化和细晶粒强化。本文通过测试异种金属焊缝界面近区碳浓度的分布，探讨了变形速率对摩擦焊最高加热温度的影响，增加变形速率可使摩擦界面的最高加热温度下降。
The effect of burn-off rate on the microstructure and mechanical properties in friction welded joint of low alloy constructional steel 35CrMo has been studied in this paper. The results show that the increase in burn-off rate and deceleration time of friction welding has improved the toughness of the weld.The mechanism of improving the toughness of weld is the finer grain size and the lower hardness of the weld.Also the microstructure of the joint has been analysed too.The fine structure of granular structure in the area near the weld has been studied by TEM.It has been indicated that the strengthening mechanism of the weld metal is the dislocation,a number of second island phases and fine grain size.By means of measuring the carbon content of the area near the weld, the effect of burn-off rate on the highest heating temperature of friction welding has also been investigated.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1999年第1期11-15,共5页
Transactions of The China Welding Institution
