锻压技术

管材加尾垫热挤压成形工艺

英文标题：Hot extrusion forming process of pipe with tail cushion

作者：程逸明拓雷锋周根树康喜唐李强

关键词：不锈钢316L 钼合金热挤压尾垫压余

分类号：TG376.2

出版年,卷(期):页码：2017,42(10):69-72

摘要：

为了降低管材压余分离工艺难度及提高管材产品成材率，研究了一种加尾垫热挤压成形工艺。以不锈钢316L作为尾垫，钼合金作为被挤压坯料，采用CAXA建立加尾垫挤压模型，设计了4种配合方式，并借助DEFORM-2D软件模拟分析了4种配合方式下挤压过程中的金属流动特征、挤压载荷曲线以及应力分布。模拟结果显示：当尾垫内孔小于或等于被挤压坯料内孔时，压余和管材能够实现自动分离；当尾垫内孔大于被挤压坯料内孔时，压余和管材不能实现自动分离，需要热锯分切。锥面配合的尾部尺寸稳定性要好于其他3种配合方式。最后以应用于液晶电子显示屏溅射靶材的钼管热挤压工艺生产实践为例，验证了尾垫与被挤压管坯等内孔挤压能够实现压余和管材的自动分离。

In order to solve the difficulty of separation process for pipe surplus metal and improve the utilization rate of pipe products, the hot extrusion forming process with tail cushion was researched. Taking stainless steel 316L as tail cushion and molybdenum alloy as extrusion billet, the extrusion model with tail cushion was established by software CAXA, four matching modes were designed, and the metal flow characteristic, extrusion force curve and stress distribution in extrusion process under four matching modes were simulated and analyzed by software DEFORM2D. The simulation results show that the surplus metal and pipe can separate automatically when the inner hole of tail cushion is small or equal to that of extrusion billet, and the surplus metal and pipe can not separate automatically when the inner hole of tail cushion is larger than that of extrusion billet which need to be separated by hot sawing. Therefore, the dimension stability in tail part of the conical surface matching method is better than that of other three matching modes. At last, the molybdenum pipe hot extrusion process is applied in sputtering target of liquid crystal displays, and the automatic separation of surplus metal and pipe is verified when the inner hole sizes of tail cushion and billet are equal.

基金项目：

国家自然科学基金青年科学基金资助项目(51305228)

作者简介：程逸明（1984-），男，硕士，工程师，E-mail：chengyim@126.com；通讯作者：拓雷锋（1984-)，男，博士研究生，工程师，E-mail：tuoleifeng1984@sjtu.edu.cn

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