2024-09-27
Based on decades of research and production practice of threaded drill rods at home and abroad, a better production process route for H22 threaded drill rods is proposed, which is low-carbon and high-strength alloy hollow steel. After forming, the whole body is carburized, and the system is cooled in a special cooling tank. The two ends are heated by medium frequency and then quenched, and low-temperature tempering is performed. Then the internal and external research surfaces can be cleaned, an
