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一、前言我厂自1964年以来,曾使用鞍钢生产的16MnL或16MnReL钢板冲制汽车车架和钢圈等零件。由于这种钢板的带状组织和夹杂物级别高,所以钢板的冷弯性能差,冲压生产时零件的开裂率也大,一般为10～40％。在BJ212纵梁成型时,严重的能裂成几块。在冲压轮辐时,钢板虽经退火处理,开裂也是不可避免的。另外,发动机支架、避震器支架等零件用20、25钢冲压也存在如上的问题。为了解决上述零件冲压开裂问题,1973年曾与鞍钢研究使用13MnTi钢板。13MnTi钢
I. Introduction I plant since 1964, has used 16MnL or 16MnReL steel produced by Ansteel punched car frames and rims and other parts. Due to the high level of banding and inclusions in this steel sheet, the cold-formed steel sheet is poor in performance and the cracking rate of parts during stamping is also large, typically 10 to 40%. BJ212 in the formation of stringers, the serious crack into several pieces. In the stamping spokes, although the annealing treatment of steel, cracking is inevitable. In addition, the engine bracket, shock absorber bracket and other parts with 20,25 steel stamping there are the above problems. In order to solve the problem of stamping and cracking parts, 1973 and Anshan Iron and Steel Research used 13MnTi plate. 13MnTi steel