锻压技术

大型锻件心部空洞型缺陷控制的数值模拟研究

英文标题：Numerical simulation study on central void defects control for heavy forgings

作者：刘倩黄放吴玉忠

单位：贵州大学

分类号：TG311

出版年,卷(期):页码：2014,39(2):132-136

摘要：

为在锻造过程中消除大型锻件心部的空洞型缺陷，采用数值模拟和实验研究方法对大型圆柱体锻件内部空洞的闭合规律进行研究。以锻件高径比、压下率和空洞位置为试验因素设计正交试验，运用商业软件Deform-3D对试验方案进行数值模拟，分析各因素对空洞闭合的影响效应。研究结果表明：压下率是影响空洞闭合的主要因素，其次是空洞位置和锻件高径比；锻件高径比为1时空洞最易闭合；空洞的闭合度随着压下率的增加而增加；空洞位置在锻件高度方向距中心越近越易闭合。

In order to eliminate the central void defects of heavy forgings during forging process, closure law of voids in heavy cylindrical forgings was investigated by numerical simulation and experiments. Orthogonal experiment was designed with ingot height to diameter ratio, reduction rate and void position as the factors, and the experiment scheme was numerical simulated by commercial software Deform-3D to analysis the impact of each factor on void closing. The results show that reduction rate is the main factor, followed by voids position and ingot height to diameter ratio. The voids are most easily to be closed if the ratio of height to diameter is equal to 1.The closure of voids goes up with the rising of reduction rate. The closer voids position near the center, the easier voids get closed.

基金项目：

国家财政部重大科技成果转化资助项目（2011020）；贵州大学研究生创新基金资助项目（研理工 2013032）

刘倩（1988-），女，硕士研究生

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