|
摘要：
|
|
在对工具钢Cr12、Cr12MoV和Cr12Mo1V1的金相组织、冲孔与扩孔时的受力状况、加热温度、以及锻造特点等进行研究的基础上,分析了材料出现裂纹及内部晶粒度达不到质量要求的原因。指出了该类材料在锻造中应该注意和避免的问题,提出了冲孔与扩孔的工艺、以及热处理工艺。研究表明,冲孔时,应将相关工具预热到200~250℃;冲孔后,应对锻件进行清理;锻后最好采用炉冷。
|
|
Cr12,Cr12MoV and Cr12Mo1V1 are important die and tool materials.The microstructure of these materials,the stress distribution of punching and hole-expanding,heating temperature and the forging characteristic were studied.The reasons causing fractures and non-reasonable internal grain size were analyzed.The issues to be prevented and noticed for forging this kind of material were pointed out and the processes of punching,hole-expanding and the heat treatment were also proposed.It is proved that the proposed method has a good result,which can be utilized in practice.The research shows that the tools should be preheated to 200~250 ℃ when punching is carried out,the forgings should be cleaned after punching and the forgings should be cooled in the furnace.
|
|
基金项目：
|
|
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]俞汉清,陈金德.金属塑性成形原理[M].北京:机械工业出版社,1999.
[2]李岩.2006新编锻模设计实用手册[M].北京:中国知识出版社,2006.
[3]贾崇田,刘庚武.高温耐热合金Nimonic 80A锻造工艺探讨[J].锻压技术,2006,31(3):16-18.
[4]中国机械工程学会锻压分会.锻压手册[M].北京:机械工业出版社,1993.
[5]吕炎.锻造工艺学[M].北京:机械工业出版社,1995.
[6]吕炎.锻件缺陷分析与对策[M].北京:机械工业出版社,1999.
[7]大连工学院《金属学及热处理》编写小组.金属学及热处理[M].北京:科学出版社,1975.
[8]大专院校《锻造工艺》编写小组.锻造工艺[M].上海:上海交通大学出版社,1976.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
