绳索取心钻杆的瞬间液相扩散连接

Transient liquid phase bonding for wireline core drill rod

采用瞬间液相扩散连接方法焊接绳索取心钻杆。试验表明,瞬间液相扩散连接接头拉伸时断在45MnMoB杆体侧,面弯和背弯180°未开裂,且焊缝内外表面无余高,成形美观,满足绳索取心钻杆焊接接头的技术要求。扭转试验中,管体首先开裂,焊缝未开裂,扭转强度远远高于螺纹连接扭转强度。表明瞬间液相扩散连接技术是满足绳索取心钻杆焊接要求的一种先进方法。

A novel welding process of transient liquid phase （TLP） diffusion bonding was used to join wireline core drill rod. Mechanical tests showed that the failure of the tensile sample was in the 45MnMoB and the bending degree is 180° , which exceeded the technical criterions of geological drill rod. There was no reinforcement inside and outside the rod. The rod failed while the joint was fine during torsion test, and the torsion strength was higher than that of screw connection. Therefore, the TLP bonding can be successfully applied for joining core drill rod.