大型挤压辊锻件两次镦拔工艺锻前加热研究  

Study on heating process before two times upsetting and stretching for heavy forgings

作　　者：苏娟华[1] 刘平[1] 董企铭[1] 史宇麟 刘晓斐[1] 

机构地区：[1]河南科技大学材料学院,河南洛阳471003 [2]中信重型机械公司,河南洛阳471039

出　　处：《金属热处理》2008年第8期152-155,共4页Heat Treatment of Metals

基　　金：河南科技大学博士科研启动基金(20070411)

摘　　要：采用两次镦拔锻造工艺,可以在大型水压机上利用小钢锭锻造大型挤压辊锻件。由于锻件尺寸大,两次镦粗和两次拔长相结合,锻造过程历时较长,需要三次锻前加热。加热不当会造成资源和时间的浪费,甚至造成锻件的报废。本文通过理论分析,考虑到材质和锻件尺寸及生产条件,制定了RP170-110挤压辊锻件两次镦拔锻造前的加热工艺,包括锻造温度范围、装炉温度、加热速度以及保温时间等。结果表明,该加热工艺具有良好效果。The forging used in heavy squeeze roller is forged by two times upsetting and stretching process. Three times heating is needed during forging process. Because of large dimensions with the maximum diameter 1750 mm, the process of heating and forging takes a long time. For high production efficiency and quality, the heating process before forging, including the range of forging temperature, charging temperature, heating rate and holding time, was researched based on the physical property of material and forgings dimension. The results show that the heating process before forging is ef- fective.

关 键 词：大锻件 两次镦拔工艺 锻前加热 

分 类 号：TG312[金属学及工艺—金属压力加工]