|Table of Contents|

Preformed blank optimization and microstructure uniformity control of GH4586 alloy turbine disk(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2021年01期
Page:
83-89
Research Field:
工艺与材料
Publishing date:

Info

Title:
Preformed blank optimization and microstructure uniformity control of GH4586 alloy turbine disk
Author(s):
WANG Kai; ZHANG Jing; LIU Jintao; MIAO Jinwu
(Xi'an Space Engine Company Limited, Xi'an 710100, China)
Keywords:
GH4586 alloy;  turbine disk;  microstructure uniformity;  forging;  preformed blank
PACS:
TG113.1; TG316.3
DOI:
-
Abstract:
GH4586 alloy turbine disk is one of the core components of the new generation liquid rocket engine.Due to the extremely terrible service environment, it is necessary to improve the microstructure uniformity of turbine disk in die forging and therefore is beneficial to improve the stability and reliability of mechanical properties. The effects of temperature and strain on the microstructures and recrystallization behavior of GH4586 alloy were studied by hot compression tests, and the range of hot forming process parameters were obtained. Based on finite element simulation and die forging experiment, the effects of different preformed blanks on strain distribution and uniformity of microstructure were compared and analyzed. The turbine disk die forging with uniform microstructure was obtained by using the double gyro preform shape with gradient rising from edge to center, and forged at 1 060 ℃. The grain size reached 6～7 at the core, and 7～8 when locating at the middle and edge. The mechanical properties of GH4586 alloy turbine disk made by the preformed blank at room temperature, cryogenic and high temperature all meet the requirement of the standards, especially the elongation at -196 ℃ and the ensile strength at 600 ℃ were increased by 37% and 12% compared with the one made by original scheme,respectively.

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Last Update: 2021-02-20