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作为汽车动力传动用零部件,如自动变速机构中的行星齿轮等,由于形状复杂、壁厚,历来是采用铸造的方法生产的。为了降低生产成本和实现此类部件的轻量化,近年来,国外已逐步开始推行钢板冲压新工艺。但是由于加工上存在的一些问题,汽车传动部件冲压成形用钢板还只能局限于600MPa级以下。为此,日本神户制钢公司加古川厂研制开发了一种新型的高强度沉淀硬化型热轧钢板,成功地实现了拉伸强度超过600MPa的汽车动力传动部件的冲压成形。由于汽车动力传动部件对材质的硬度和
As a vehicle powertrain components, such as automatic transmission in the planetary gear, due to the complexity of shape, wall thickness, has always been the method of casting production. In recent years, in order to reduce the production cost and realize the weight reduction of such components, the foreign countries have gradually started to implement the new technology of steel stamping. However, due to the processing of some problems, automotive transmission parts stamping forming plate can only be limited to less than 600MPa level. To this end, Japan’s Kobe Steel Corporation Kakogawa plant has developed a new type of high-strength precipitation hardening hot-rolled steel plate, the successful realization of the tensile strength of automotive power transmission components more than 600MPa stamping. Due to the hardness of the vehicle power transmission components and materials