SLOW COOLING TREATMENT OF HIGH-ALLOYED SUPERALLOY.

被引：1
|
作者：
Lu, X. D. [1 ]
Du, J. H. [1 ]
Deng, Q. [1 ]
Zhong, Z. Y. [1 ]
机构：
[1] Cent Iron & Steel Res Inst, Dept Superalloy, Beijing 100081, Peoples R China
来源：
NEW MATERIALS AND PROCESSES, PTS 1-3 | 2012年 / 476-478卷
关键词：
Nickel base superalloy; High-alloyed; Slow cooling treatment; Workability; HOT DEFORMATION-BEHAVIOR; GH4742; SUPERALLOY; MICROSTRUCTURE;
D O I：
10.4028/www.scientific.net/AMR.476-478.98
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The very poor hot workability of high-alloyed GH4742 superalloy is represented in the aspects of very narrow available deformation temperature range, high deformation-resistant force and poor ductility. In this paper, a special heat treatment to change the ingot microstructure is proposed to improve the hot workability of the GH4742 superalloy. The gamma' phase with a appropriate size and morphology and tortuous grain boundary were obtained by slow cooling in the gamma+gamma'two phases region after solution treatment. Modified microstructure induces that the hot deformation flow stress of GH4742 superalloy was decreased effectively and hot deformation plasticity was increased obviously.
引用
收藏
页码：98 / 104
页数：7
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