不同镦粗工艺对钢锭内部孔洞缺陷闭合行为的影响  

Influence of Different Upsetting Process on Closing Behavior of Void Defects in Ingot

作　　者：陈飞[1,2] 焦永星 李飞[1,2] 张学忠[1,2] 贾哲 CHEN Fei;JIAO Yongxing;LI Fei;ZHANG Xuezhong;JIA Zhe(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Heavy Casting and Forging Engineering Technology Research Centre,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]太原科技大学山西省大型铸锻件工程技术研究中心,山西太原030024

出　　处：《热加工工艺》2025年第3期114-119,共6页Hot Working Technology

基　　金：山西省高等学校科技创新项目资助(2021L331);太原科技大学科研启动基金资助(20222025)。

摘　　要：钢锭内部的孔洞缺陷是一种典型的铸造缺陷。这种孔洞缺陷必须通过合理的锻造工艺予以消除,实现孔洞的闭合,以得到高质量的锻件产品。通过数值模拟以及理论分析,研究了不同镦粗工艺对孔洞缺陷闭合行为的影响规律。利用Deform-3D有限元软件,使用数值模拟的方法,并基于一种孔洞演变模型分析了镦粗变形时摩擦系数和锭坯高径比对孔洞闭合的影响。研究发现,锭坯与砧子之间的摩擦系数越大、锭坯高径比越接近1.0,心部位置的孔洞越容易闭合,但是砧子与锭坯端面接触位置的孔洞越难以闭合。Void defect in ingot is a typical casting defect.This defect must be eliminated by reasonable forging process to realize the closure of the void,so as to ensure the high quality of forging products.Through numerical simulation and theoretical analysis,the influence of different upsetting processes on the void closing behavior was studied.Using Deform-3D finite element software and numerical simulation method,based on a void evolution model,the influence of friction factor and height-diameter ratio of ingot on the evolution behavior of void defects in ingot during upsetting deformation were analyzed.It was found that the higher the friction factor between ingot and anvil,the closer the height-diameter ratio of ingot is to 1.0,the void in the core position is easier to close,but the void in the contact position between anvil and ingot is more difficult to close.

关 键 词：孔洞闭合 镦粗 钢锭 数值模拟 

分 类 号：TG31[金属学及工艺—金属压力加工]