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钎子钢在井下使用条件是很恶劣的,它要把凿岩机活塞的冲击能量传递给钎头,要同时承受压、扭、弯等各种应力。我矿使用的小型凿岩机是YS45和7655。这两种凿岩机的性能分别是冲击功大于7和6.2公斤米,扭矩大于180和150公斤厘米,冲击频率为2800和2100次/分。这样高的冲击能在钎杆中以5000米/秒的应力波传播,这样就使钎子最易形成疲劳折断。为了提高钎子的寿命,就必须使它的机械性
The use of brazing steel in underground conditions is very poor, it is necessary to pass the impact energy of the rock drill piston to the bit, to withstand the pressure, torsion, bending and other stress. The small rock drills I used for the mine are YS45 and 7655. The performance of these two rock drills is greater than 7 and 6.2 kg of impact energy, torque greater than 180 and 150 kg cm, the impact frequency of 2800 and 2100 / min. Such a high impact can be propagated in the drill rod with a stress wave of 5000 m / s, which makes it easier for the brazing filler to break up. In order to improve the life of the solder, it must be made mechanically