【作者】 张励忠； 李海开； 胡远猛； 肖黎明； 韩淑霞；

【Author】 Zhang Lizhong, Li Haikai, Hu Yuanmeng, Xiao Liming, Han Shuxia(School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044)

【机构】 北京交通大学机械与电子控制工程学院；

【摘要】 采用半固态流变模锻工艺加工出了形状完整、轮廓清晰的B级钢零件。零件内部质量良好,但表面有明显缺陷。其中,皱纹缺陷较为突出。以轴箱体零件为例,探讨了皱纹缺陷的形成机理,分析了其影响因素。理论分析表明:模具预热温度、成形比压是影响铸件质量的关键因素。在理论分折的基础上进行了一系列实验,结果表明:优化模具温度、成形比压等工艺参数可以消除皱纹缺陷。在模具预热温度为400-450℃,比压为110-120 MPa,零件表面质量较好,无皱纹缺陷。更多还原

【Abstract】 The grade B steel part with complete shape and clear contour was obtained by semi - solid rheological die forging. The internal quality of the part was fine, but the surface quality was not. Some surface defects especially elephant skin was found. The forming mechanism and influence factors of elephant skin were discussed based on journal box body, and some critical influence factors such as the preheating temperature of mold, forming pressure etc. were determined. Then a series of experiments was carried out. And it was show that by optimizing forming parameters the elephant skin was eliminated, when the preheating temperature of mold in 400-450℃, forging pressure in 110-120 MPa.更多还原