|
摘要：
|
|
提出了在(α+β)两相区内,通过改变断面,即采用四方断面→六边形断面→矩形断面的宽砧拔长方法转移变形体的大变形区,并结合β处理工艺,有效改善大尺寸断面TC4钛合金长型自由锻件组织均匀性的方法。这种方法能有效地破碎长径比大于3的供应棒材中条状α相,能使带有不均匀高、低倍组织的大规格棒材,改变成为低倍组织为模糊晶,高倍组织为均匀、细小的球状或短棒状α相的组织,并能使钛合金自由锻件有良好的力学性能。
|
|
In this paper,a method of improving structure uniformity of TC4 titanium open-die forgings of large cross section have been put forward as the big size bar is used.For the big size bar with slenderness ratio being greater than 3,heavy deformation upset could not be used and big prior β grains in raw stock could not be broken.When drawing out method is used through alternating tetragonal cross-section into hexagonal cross-section on broad anvil and combining β treatment,the large deformation zone in deformation body is transferred and the banded α can be broken. It makes macrostructure and microstructure of open-die forging uniform and a good tensile property at room temperature can be achieved.
|
|
基金项目：
|
|
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]姚泽坤,苏华,刘庆泉,等.热加工工艺参数对TC11钛合金叶片显微组织细化、球化的影响[J].热加工工艺,1995,(1):6 10.
[2]George Krauss.Deformation,Processing,and Structure,ASM,Ohio,1982,309.
[3]陈玉文,王金友.钛科学与工程[C].第八届全钛及钛合金学术交流会文集,上海钢铁研究所,1993:201 207.
[4]姚泽坤,郭鸿镇,苏祖武.改善钛合金棒材和锻件低倍和高倍组织的研究[J].西北工业大学学报,1992,10(4):487 494.
[5]张文毓.TA5钛合金大厚板组织和性能均匀性研究[J].稀有金属,1997,21(z1):159 162.
[6]宫波,徐振声,赖祖涵.钛科学与工程[C].第七届全国钛及钛合金交流会文集,中南工业大学出版社,1990:206 208.
[7]Salishchev G A,Vliakhmetov O R,Galeyev R M.Formation ofsubmicrocrystalline structure in the titanium alloy VT8 and itsinfluence on mechanical properties[J].Journal of MaterialsScience,1993,28:2898 2902.
[8]姚泽坤,郭鸿镇,苏祖武,等.双性能钛合金压气机盘的成形机理[J].中国有色金属学报,2000,10(3):378 382.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
