| 摘要 |
PURPOSE:To reduce the number of rolling passes required for forming a shape by rolling, and to make the installation compact, by forming a rough formed steel-stock through rolling after reheating it, and regulating the temperature of a final product to the specific temperature. CONSTITUTION:A rough formed steel stock W1, obtained by rough rolling a heated stock, is formed by rolling while passing it through forming mills 2, 3, 4 in sequence after reheating it in a heating furnace, and the temperature of a final formed-product W2 is regulated to >=1,020 deg.C. Accordingly, the metallurgical structure of the product W2 is improved because the stock is formed by rolling it in a high temperature state, and the solution treatment to be performed after rolling can be eliminated when occasion demands. |
