锻压技术

6082铝合金转向节模锻工艺及变形规律

英文标题：Die forging technology and deformation law of steering knuckle for

作者：许周礼陈天赋张运军胡志力

分类号：TG316.2

出版年,卷(期):页码：2019,44(6):17-23

摘要：

以铝合金转向节的生产为例，介绍了目前铝合金转向节的生产工艺流程。使用Deform-3D软件模拟转向节模锻成形的主要工步，采用450，500和535 ℃（固溶时的温度）不同加热温度，研究锻造加热温度对成形过程中温度、应力、应变及金属流动等因素的影响。模拟结果表明：加热温度升高可降低锻造过程应力值，提升金属流动，降低设备所需打击力，但由于模锻过程尤其是预锻中摩擦生热较大，促使锻件局部温度上升，加热温度过高，局部易过烧。综合相关因素的影响，选取加热温度在450~500 ℃之间，既可降低所需载荷力大小、提高塑性，也可避免发生局部过烧，保证产品质量。取样观察450 ℃加热温度下试制成品，发现组织呈规则有序的纤维状，成形效果良好。

For the production of aluminium alloy steering knuckle, the current production process of aluminium alloy steering knuckle was introduced. Then, the main steps of steering knuckle die forging were simulated by software Deform-3D, and the influences of forging heating temperature on temperature, stress, strain and metal flow in the forming process were studied at different heating temperatures of 450, 500 and 535 ℃ (temperature at solution), respectively. The simulation results show that the increase of heating temperature can reduce the stress value in forging process, increase metal flow and reduce the impact force required by the equipment. However, due to the large amount of heat generated by friction during the die forging process, especially in the pre-forging process, the local temperature of forgings is increased. If the heating temperature is too high, it is easy to cause local over-burning. According to the influence of related factors, selecting the heating temperature of 450-500 ℃ during forging process reduces the required load force, improves plasticity, avoids local over-burning and ensure product quality. By sampling and observing the finished product at heating temperature of 450 ℃, the products display regular and organized fibrous structure, and their forming effects are good.

基金项目：

湖北省技术创新专项（2017AAA008）；湖北省高等学校优秀中青年科技创新团队计划项目 (T201629)

许周礼（1994-），男，硕士研究生 E-mail：xuzhouli@foxmail.com 通讯作者：胡志力（1983-），男，博士，副教授 E-mail：zhilihuhit@163.com

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