| 摘要 |
In order to achieve a yield strength of between 400 and 600 MPa and an elongation of at least 14%, steel reinforcing bars are rapidly cooled during or immediately after rolling. The mean calorific flux density, ? (MW/m2), between 800 and 600.degree.C and the duration of cooling, t (seconds), satisfy the following conditions: 0.45 d - 0.4<? . t<0.82 d + 0.6 log?? ,- 0964 log d + 2.098 in which d (mm) is the bar diameter. |
