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根据上防扭臂锻件技术条件要求 ,确定了等温模锻新工艺为解决锻件的粗晶问题的最佳成形工艺方案 .简要介绍了在 5× 10 4kN液压机上实现等温模锻新工艺时模具结构特性 .经工艺试验确定了最佳变形温度约为 45 0℃ ,应变速率为 9.6× 10 4～ 7.6× 10 - 3s- 1 及较佳的坯料形状、尺寸及润滑剂 .分析了该模锻件产生缺陷的原因和消除缺陷的方法 .用等温模锻新工艺研制的锻件冶金质量符合AIR3385、Z9-J冶 - 32 4、Z9-J冶 - 32 5技术条件要求 ,其力学性能、晶粒度、电导率、纤维流线和锻件内外表面质量均有所提高 ,满足了生产要求 .
According to the technical requirements of anti-twist arm forgings, the best forming process scheme to solve the problem of coarse grain of forgings is determined by the isothermal die forging process.The structure of the die when the isothermal die forging process is implemented on a 5 × 10 4kN hydraulic press is briefly introduced The optimum deformation temperature is about 45 ℃ and the strain rate is 9.6 × 10 4 ~ 7.6 × 10 -3 s -1 and the shape, size and lubricant of the billet are determined by the process test.The generation of The cause of the defects and the method of eliminating the defects.The metallurgical quality of the forgings developed by the isothermal die forging process is in accordance with the technical requirements of AIR3385, Z9-J-32 4, Z9-J-32 5, the mechanical properties, grain size, Conductivity, fiber flow and forging the quality of the inner and outer surfaces have increased, to meet the production requirements.