第43卷第1期 Vol. 43
No.1
压救术饭
FORGING & STAMPING TECHNOLOGY
大型厚壁管热挤压成形工艺参数优化
李琚陈
（安徽文达信息工程学院机电工程学院，安徽合肥231201）
2018年1月 Jan.2018
摘要：以P91钢大型厚壁管为研究对象，基于Defomm-3D平台建立厚壁管垂直热挤压过程的有限元仿真模型。选取坏料预热温度T。、挤压比入、挤压速度"、凹模锥角β和障擦因子产为影响因索，以最大挤压力F、成形管平均壁厚d、模口等效应变均方差和模口金属流速均方差V，为衡量指标，进行虚拟正交试验。通过实际工业生产，验证了有限元模拟结果的可靠性。研究结果表明：影响F，d，，V的因素主次顺序分别为：A>T>β>μ>，A>>T>μ>β，β>A>μ> T,和>T。>μ>A>β；获得尺寸为@720mm×(520mm×12000mm的P91钢大型厚壁管热挤压成形工艺参数的取值范围为： T，=11501200℃，A=5~7，=20~60mm·s-1，β=35°~45°，=0.05~0.2。经过实际工业生产验证可知，虚拟正交试验得到的工艺参数较为准确、可靠。
关键词：大型厚壁管；垂直热挤压；P91钢；有限元仿真模型；虚拟正交试验 DOI: 10. 13330/j. issn. 1000-3940. 2018. 01. 014
中图分类号：TG376.2
文献标识码：A
文章编号：1000-3940（2018）01-0077-06
Optimization on hot extrusionprocess parameters for large thick-walled pipe
Li Juchen
( School of Electromechanical Engineering, Anhui Wonder University of Infomation Engineering, Hefei 231201, China )
Abstract : For large thick-walled pipe of steel P91 , a finite element model of its vertical hot extrusion process was established by the De form-3D software. The virtual orthogonal experiment was numerically simulated with influential factors of the blank preheating temperature Te, extrusion ratio A, extnusion speed >, taper angle β of die and friction factor μ and with evaluation indexes of the maximum extrusion load F.n, the average wall thickness d,, of foming pipe, the mean square error of equivalent strain e.a at die export and the mean square error of metal flow rate V, at die esport. The reliability of finite element simulation results were verified by actual industrial production. The results show that the significance sequences of influence on Fur, dgg ad, and Va are A > T, >β >μ >r, A >r > T, >μ >β, β > A >μ μ > T, and r > T, >μ > A >β, respectively. For the large thick-walled pipe of steel P91 with 720 mm × 520 mm × 12000 mm, the Z 0 S0 0 = r pum oS eSE= g *,_s , u 09 (= a *L S= *3, 002I 0STI= ° am stapuemd ssaaod Bupug p sotumu asostar The actual industrial prodluxtion shous that the proxess paraneters obtained by the virtual orthogonal experiments are accurate and reliable Key words : large thick-walled pipe; vertical hot extrusion; steel P91 ; finite element model; virtual orthogonal experiment
随着国防工业、石油化工、电力等行业的迅速收稿日期：20170706；修订日期：20170921
基金项目：安微高校自热科学研究重点项目（KJ2017A650）
作者筒介：李据陈（1986-），男，颈士，讲师 E-mail: cjoahwd@ 163. com
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特种成形栏目是由北京机电研究所有限公司①费助刊出