P91无缝钢管立式热挤压工艺的边界条件  

Boundary conditions during vertical hot extrusion of thick-wall seamless steel tube

作　　者：马晓晖[1] 边翊[1] 彭冲[1] 闫红艳[1] 钟志平[1] 

机构地区：[1]北京机电研究所,北京100083

出　　处：《锻压技术》2011年第4期119-122,共4页Forging & Stamping Technology

基　　金：国家科技重大专项课题(2010ZX04017-013)

摘　　要：以P91厚壁无缝钢管立式挤压为研究对象,采用缩比挤压的试验方法实测得到了挤压比为5,7和9时挤压过程的载荷行程曲线。应用Deform软件模拟不同边界条件下的挤压变形过程,通过对数值模拟结果和实测值进行挤压力误差分析,确定摩擦系数μ=0.03～0.05,为大口径厚壁无缝钢管的挤压工艺模拟提供了合理的边界条件。P91 thick-wall seamless steel tube vertical extrusion process was studied.The load-stroke curve with extrusion ratio of 5,7and 9 was obtained during extrusion process using proportional reduction method.Extrusion deformation in different boundary conditions was performed using Deform software.By comparative analysis of the finite element simulation results and experimental datas,the friction coefficient μ（0.03～0.05） was finally determined,which provided reasonable boundary conditions for the extrusion process of large diameter thick wall seamless steel tube.

关 键 词：立式挤压 缩比试验 有限元模拟 边界条件 

分 类 号：TG376.2[金属学及工艺—金属压力加工]