第42卷第8期 Vol. 42No. 8
钣压技术
FORGING & STAMPING TECHNOLOGY DEFORM模拟支撑辊的锻造
王玉红'，马廷威2
2017年8月 Aug-2017
（1.营口理工学院电气工程系，辽宁营口115014：2.营口理工学院机械与动力工程系，辽宁营口115014）
摘要：轧机中的关键零件之一支撑辑在轧制设备运行的过程中承受轧辑传来的交变应力。大型支撑辑由大型钢锭锻造而成，但大型钢锭中存在种种缺陷，给支撑辑的质量带来很多向题。针对此问题，采用WHF法能够锻合锻件内部组织缺陷，可改善锻件质量。采用DEFORM软件，模拟WHF法拔长，研究WHF法在锻造拨长过程中对锻件心部的作用。实验研究表明，WHF 法在拔长的第3道次时，锻件心部的应力状态由拉应力完全转变为压应力。同时，到第6道次后，锻件心部等效应变达到
关键词：支撑辑：钢锭：DEFORM；等效应变；WHF法；缺陷 DOI: 10. 13330/j. issn. 1000-3940. 2017. 08. 034
中图分类号：TG316.1
文献标识码：A
文章编号：1000-3940（2017）08-0185-06
Simulationonforgingofback-uprollbyDEFORM
Wang Yuhong', Ma Tingwei
( 1. Department of Electrical Engineering, Yingkou Institute of Technology, Yingkou 115014, China; 2. Mechanical and Power Engineering, Yingkou Institute of Technology, Yingkou 115014, China)
Abstract: The back-up roll is one of important roles in rolling equipment and bears the altermating stress that comes from the roll when the rolling equipment works, However, the huge back-up roll was forged by huge ingot, and some defects existed could cause a lot of quality problems. For the above problem, the ingot defects were forged by WHF method, and the forging quality was improved. Then, WHF pul-ling was simulated by DEFORM software, the effect of WHF on the core of forging during the processes of forging and pulling was studied. The experiment study shows that stress in the core of forging transfers from tensile stress into compressive stress on the third pass, At the same time, the equivalent strain in the core of forging reaches 1. 2 after the sixth pass. Therefore, the WHF method can completely avoid the internal defects of forging, and produces the qualified back-up roll forgings according to the values of the compressive stress and equiv-alent strain in the core of forging.
Key words : back-up roll; ingot; DEFORM; equivalent strain; WHF method; defect
支撑辊是轧机中重要的组成部分，轧机工作时，支撑辊承受轧辊传来的交变应力，工作环境恶劣"），易出现断裂、强韧性不够、表面腐蚀等失效形式，因此对支撑辑质量要求较高。大型支撑辊由大型钢锭锻造生产，大型钢锭内部存在疏松杂质等缺陷，锻造过程是利用心部的三向应力状态来锻合钢锭内部缺陷，破碎碳化物，从而提高支撑辊的质量。以某厂生产的70Cr3Mo支撑辑为例，采用De-
收稿日期：20170315；修订日期：20170515
基金项目：2015年度营口理工学院院级科研项目（QN.201512）
作者简介：王玉红（1983-），女，硕士，讲师 E-mail; wangyuhong425@ 126. com
通讯作者：马廷威（1978-），男，硕士，副教投 E-mail: matingwe@ 163. com
万方数据
fom模拟锻造过程，找出适合的锻造工艺，生产出合格的支撑辊。支撑辊如图1所示。
图1支撑辑示意图
Fig, 1Schematic diagram of back up roll 实验材料与工艺
70Cr3Mo钢进行双真空冶炼，实际冶炼成分如表1所示。