Method of production of steel tubes for penetrating rods, improvement of their mechanical properties, and rods obtained from these tubes

摘要

It refers to the production method of steel pipe, which includes: (1) putting a certain component of steel on a steel bar or iron, the component is 0.18% to 0.32% by weight, 0.3% to 1.6% by weight, 0.1% to 0.6% by weight, 0.005% to 0.08% by weight, 0.2% to 1.5% by weight, 0% by weight and 0.2% to 1.0% by weight. The rest is composed of iron and impurities, and the quantity of each element is provided according to the total weight of steel composition; two steel pipes are molded; three steel pipes are heated from strict temperature to obtain a cold pipe.(IV) cold push the steel pipe to obtain the last pipe; and (IV) heat the last pipe to obtain the steel pipe. This method adjusts the dimensional tolerance and reduces the residual voltage in the steel pipe.