大断面收缩率一次楔入轧件心部缺陷的实验研究  

Experimental study on internal defect of heavy section shrinkage workpiece under one cross wedge rolling

作　　者：何巍巍[1] 张康生[1] 贾震[1] 胡正寰[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《锻压技术》2009年第2期27-30,共4页Forging & Stamping Technology

基　　金：国家自然科学基金项目(50575023;50435010);高等学校博士学科点专项科研基金项目(20050008024);国家科技支持计划项目(2006BAF04B03)

摘　　要：为深入考察楔横轧大断面收缩率一次楔入轧件的心部质量状况,在H500轧机上进行了不同工艺条件下的轧制实验,得到了断面缩减率大于75%的一次楔成形时轧件心部不易产生宏观缺陷;揭示出各个工艺参数对轧件心部缺陷的影响规律;并发现成形角是影响心部质量的决定性因素,大成形角有减少缺陷产生的趋势。研究结果为进一步探索楔横轧的心部缺陷机理提供了依据。To further study the state of the internal defects of heavy section shrinkage workpiece under one cross wedge rolling, the rolling experiment under different process conditions was done on H500 rolling mill. It is found that when the cross section shrinkage of one cross wedge rolling workpiece is bigger than 75 %, the rolled pieces are not easy to have macroscopic internal defects. The influence rules of processing parameters to the internal defects are discovered and the forming angle is the most important mechanical parameter to affect the internal defects. The big forming angle has a tendency to reduce the internal defects. The results provide a guideline for the internal defect formation mechanism.

关 键 词：楔横轧 心部缺陷 大断面收缩率 成形角 

分 类 号：TG335.19[金属学及工艺—金属压力加工]