| 摘要 |
<p>A process for producing seamless pipes excellent in mechanical properties with a great energy-saving effect by conducting the steps from piercing-rolling to heat treatment continuously. Namely, a process for the production of seamless pipes which comprises piercing-rolling, elongation-rolling, sizing, reheating, quenching and tempering, characterized in that the sizing is finished under the conditions of seamless pipe temperature of 600°C or above and below 800°C and that the reheating is conducted by charging a seamless pipe at a temperature of 400°C or above into a reheating furnace and reheating the pipe at a temperature of Ac3 transformation point or above and up to 1000°C.</p> |
