| 摘要 |
<p>PURPOSE:To obtain a steel material suitable for use as a brace material absorbing external energy such as deformation or vibration energy by hot working and cooling steel contg. specified amts. of C, Si, Mn, P, S, Al, N, etc., under prescribed conditions. CONSTITUTION:Steel consisting of, by weight, <=0.004% C, <=0.1% Si, <=0.1 5% Mn, <=0.015% P, <=0.01% S, 0.5-2% sol. Al, <=0.005% N, <=0.005% oxygen and the balance Fe is refined, heated to 950-1300 deg.C, hot worked at >=950 deg.C finishing temp. and cooled at a cooling rate below the air cooling rate.</p> |
