锻压技术

高端商务车铝合金转向节精密铸锻复合成形工艺优化

英文标题：Optimization on precision casting and forging composite forming process for aluminum alloy steering knuckle of high-end business vehicle

作者：夏巨谌1 邓磊1 张茂1 张嘉城1 王新云1 冯仪2 余俊2 夏自力2

单位：1. 华中科技大学材料科学与工程学院 2. 武汉新威奇科技有限公司

关键词：铝合金转向节挤压铸造精密铸锻复合成形小飞边精锻

分类号：TG316

出版年,卷(期):页码：2024,49(8):1-5

摘要：

以A356铝合金转向节作为典型案例，详细分析了零件的材料、结构和性能特性，以及现有生产工艺存在的不足之处。在对比分析3种铝合金挤压铸造成形工艺优缺点的基础上，提出对精密挤压铸件进行小飞边精锻，通过塑性成形来提高零件内部的致密度，进而达到提高其力学性能和承载能力的目的。通过对精锻成形工艺的机理分析，建立了工艺参数优化模型，明确了转向节挤压铸造与小飞边精锻复合工艺流程。经过试产验证，该工艺方案具有工艺流程短、节材、节能、制件质量高、生产成本低、经济效益好等特点，受到国内外高端客户的欢迎。

For A356 aluminum alloy steering knuckle, the material, structure and performance characteristics of the part and the shortcomings of the existing production processes were analyzed in detail. Based on the comparison and analysis of the advantages and disadvantages of three kinds of aluminum alloy extrusion casting processes, it was proposed to perform the precision forging with small flash on the precision extrusion casting parts,and enhance the internal density of parts by plastic forming to achieve the goal of improving their mechanical properties and load-bearing capacity. Furthermore, through analyzing the mechanism of precision forging process, an optimization model for process parameters was established, and the composite process flow of extrusion casting and precision forging with small flash for steering knuckle was clarified. The trial production verification shows that this process scheme has the characteristics of a short process flow, material saving, energy conservation, high quality of part, low production cost and good economic benefits, which has been well-received by high-end customers at home and abroad.

基金项目：

湖北省自然科学基金面上项目（2023AFB564）

作者简介:夏巨谌（1941-），男，学士，教授 E-mail：xjc_hust@163.com 通信作者:张茂（1989-），男，博士，副教授

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