地质钻杆的瞬时液相扩散连接双温工艺
Transient Liquid Phase Bonding of Geological Drill Pipe Using Two-step Heating Process
摘 要
采用瞬时液相扩散连接双温工艺对45MnMoB地质钻杆进行了焊接,氩气保护,非晶箔合金作中间层;利用扫描电镜、万能材料试验机和电子探针等分析了连接接头的显微组织、力学性能和元素分布.结果表明:接头处形成了跨界面连续生长的晶粒,其组织与母材组织相同;传统瞬时液相扩散工艺连接的组织性能不如双温工艺的好,1 230/1 250 ℃双温工艺获得的接头抗拉强度为890 MPa,弯曲角为180°.
瞬时液相扩散连接
双温工艺
geological drill pipe
transient liquid phase(TLP) bonding
two-step heating
Abstract
The geological drill pipes of 45MnMoB were joined by transient liquid-phase(TLP) two-step heating bonding process using amorphous filler in argon atmosphere.The microstructure and properties as well as the element distribution of the TLP bonding joints were investigated by means of SEM,material testing and EPMA.The results show that transient liquid phase bonding produced a homogenous joint with microstructure and composition equivalent to those of the base metal.The microstructure and properties of joint with one-step heating process was not as those of good as those of two-step heating process.The joint tensile strength obtained by two-step heating process (1 250/1 230 ℃) reached 890 MPa and the bending reached 180°.
中图分类号 TG456.9
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收稿日期 2007/7/1
修改稿日期 2007/7/28
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备注陈思杰(1963-),男,河南沁阳人,副教授,博士.
引用该论文: CHEN Si-jie,WANG Xue-gang,LI Xin-geng. Transient Liquid Phase Bonding of Geological Drill Pipe Using Two-step Heating Process[J]. Materials for mechancial engineering, 2008, 32(5): 52～54
陈思杰,王学刚,李辛庚. 地质钻杆的瞬时液相扩散连接双温工艺[J]. 机械工程材料, 2008, 32(5): 52～54
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参考文献
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