|Table of Contents|

The research on defect analysis of titanium alloy and improved process(PDF)

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

Issue:
2019年06期
Page:
78-83
Research Field:
工艺与材料
Publishing date:

Info

Title:
The research on defect analysis of titanium alloy and improved process
Author(s):
WU Xiaoming WANG Yu GUO Bei GAO Bin GAO Huaisheng YANG Huanqing
(Xi’an Space Engine Company Limited, Xi’an 710100, China)
Keywords:
titanium alloy crack control simulation casting process improvement gas protection
PACS:
V463
DOI:
-
Abstract:
The problem of fluorescence linear defect after hydraulic test of a certain type of engine shell component was discussed, the defect type and generating reasons were researched by macro-observation, metallographic technology, crack analysis composition analysis and harness checking.Procast casting simulation software was used to improve the process.The results show that defect type is crack, showing the quasi cleavage crack.The surface oxygen rich layer caused the crack of the shell.The crack formation is related to repair welding combined with the production process.The improved process transferred the defects to the riser by simulation, reduced the number of defects and repair welding.The Argon gas shield was used to improve the efficiency of shielding and quality of repair welding.By using above measures, the fluoroscopy results of casting, component and groupware were qualified.In addition, the product passes the ground test.The problem of fluorescence defects is solved, the weak link is eliminated, and the reliability of the engine is improved.

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Last Update: 2019-12-20