热处理工艺对摩擦焊接钻杆力学性能的影响

Effects of heat treatment technology on mechanical properties of friction welding drill rod

摩擦焊接钻杆要求其机械性能达到行业标准要求,钻杆焊后的机械性能是由合理的焊接工艺和正确的热处理工艺保证的。通过对具体工艺生产的钻杆的检验结果进行分析,探讨了如何郭据焊后钻杆的力学性能和金相检测结果判断摩擦焊接钻杆不符合行业标准要求的原因,分析了热处理工艺对钻杆力学性能的影响。结果表明,当焊接工艺选择合理时,焊缝的强度值低于标准,冲击韧性值过高,热处理热影响区硬度值偏低,是由于淬火或回火工艺不合理造成的,可通过调整淬火或回火工艺解决。

Mechanical properties of the friction weld drill rod, which is guaranteed with the rational welding technology and the rational heat treatment technology, must meet the requirements of profession standards. It is studied how to judge the cause of products being not up to standard. The effect of heat treatment technology on mechanical properties of the welded dill rods is analyzed. The results show that during the normal welding technology the yield intensity lower than that of profession standards, the impact ductility much higher than normal and the lower hardness in the heat treatment area are due to incorrect quench or temper technology. It can be corrected by revising quench or temper technology.