锻压技术

工艺参数对TC4钛合金高压气瓶无芯模热旋压塑性性能的影响

英文标题：Influence of process parameters on plastic properties for non-mandrel hot spinning of TC4 titanium alloy high-pressure gas cylinder

作者：魏巍1 罗雄1 范俊明2 陈刘斌2 吴明霞3 唐凯3

单位：1.成都市特种设备检验检测研究院 2.成都格瑞特高压容器有限责任公司 3.四川大学机械工程学院

关键词：钛合金高压气瓶热旋压进给比旋压温度

分类号：TG316.3

出版年,卷(期):页码：2023,48(12):142-150

摘要：

使用DEFORM有限元软件对不同工艺参数条件下的TC4钛合金高压气瓶无芯模热旋压成形过程进行了模拟，研究了旋压温度、进给比和旋轮圆角半径对成形过程中塑性性能的影响。结果表明：旋压温度升高，而成形过程中气瓶表面所受的等效应力减小，而不同温度时各采样点的等效应变基本相同；进给比降低，等效应变增大，且对等效应力影响显著，进给比为3.0 mm·r-1时各采样点间的应力值变化较为均匀；旋轮圆角半径越小，等效应力在深度方向上减小的程度更大，半径R为60和80 mm时旋轮对气瓶表面产生的等效应力变化较大，R为100 mm时的等效应力变化较小且工件具有更好的均匀性。综上所述，TC4钛合金高压气瓶的最佳热旋压工艺参数为：旋压温度为950 ℃、进给比为3.0 mm·r-1、旋轮圆角半径为100 mm。

The non-mandrel hot spinning process of TC4 titanium alloy high-pressure gas cylinders under different process parameter conditions was simulated by DEFORM finite element software, and the influences of spinning temperature, feed ratio and roller fillet radius on the plastic properties during the forming process were studied. The results show that when the spinning temperature increases, the equivalent stress on the gas cylinder surface during the forming process decreases, but the equivalent strains at each sampling point are basically the same at different temperatures. When the feed ratio decreases, the equivalent strain increases, and the effect on the equivalent stress is significant. When the feed ratio is 3 mm·r-1, the stress value changes are relatively uniform between the sampling points. The smaller the fillet radius of roller, the greater the reduction degree of equivalent stress in the depth direction, the change of the equivalent stress caused by the roller on the surface of gas cylinder is great when the radius R is 60 and 80 mm, and the change of the equivalent stress is small when R is 100 mm and the workpiece has better uniformity. In conclusion, the optimal hot spinning process parameters for TC4 titanium alloy high-pressure gas cylinders are the temperature of 950 ℃, the feed ratio of 3 mm·r-1, and the roller fillet radius of 100 mm.

基金项目：

作者简介：魏巍（1982-），男，硕士，高级工程师 E-mail：18708185844@163.com 通信作者：唐凯（1992-），男，博士研究生 E-mail：tangkai0516@163.com

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