(1)高强度热轧钢板 汽车传动部件由于形状复杂、壁厚,历来是采用铸造法生产。为了减轻此类部件的重量和降低生产成本,一些厂家开始采用钢板冲压新工艺。但由于加工问题,汽车传动部件冲压成形钢板只局限于拉伸强度600兆帕级以下。 日本神户制钢公司制成了一种新型的高强度热轧钢板,成功地实现了拉伸强度超过 (1) high-strength hot-rolled steel automotive transmission parts due to the complex shape, wall thickness, has always been the use of casting production. In order to reduce the weight of such parts and reduce production costs, some manufacturers began to use steel stamping new technology. However, due to processing problems, automotive transmission parts stamping forming plate is limited to tensile strength 600 MPa below. Kobe Steel Co., Ltd. of Japan made a new type of high-strength hot-rolled steel plate, the successful realization of the tensile strength of more than