低密度铌合金焊接性能的研究

Microstructure and Properties of Welded Joints of Low Density Niobium Alloy

摘要:

采用真空电子束焊接方法,研究了低密度铌合金自身焊、与高强铌合金、高温钛合金等合金的焊接性能。 采用电子束流偏向高熔点合金一侧的焊接方式,针对不同合金,调整相应电流、焊接速度、偏置距离等参数,得到的焊接接头成形良好,抗拉强度优异。室温下自身焊、与Nb521及与TC4合金焊接系数均大于0.9,塑性均与基材保持一致；1100℃下,与Nb521合金焊接强度可达75.3MPa,基本与基材持平。

Abstract:

The electronic beam welding (EBW )properties of low density niobium alloy(LDNb) with high strength niobium alloy、high temperature titanium alloy was investigated in this paper.For different alloys,deviate electrnic beam to higher melting alloy side,corresponding adjust the current、 welding speed and deflection distance,the results showed that the welded joint is smooth and has good tensile strength. Welding coefficients of welding itself 、joint of LDNb and Nb521 Alloy 、joint of LDNb and TC4 alloy all above 0.9 at room temperature,plastic are consistent with the base alloy.The ultimate strength of welding joint of LDNb and Nb521 alloy up to 75.3MPa at 1100℃.