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[1]秦永涛,高 强,武荣艳,等.液氧增压气体阀门肩圈的裂纹理化特性分析[J].火箭推进,2015,41(04):67-73.
　QIN Yongtao,GAO Qiang,WU Rongyan,et al.Physicochemical characteristic analysis on shoulder ring flaw of pressure boost gas valve in liquid oxygen supply system[J].Journal of Rocket Propulsion,2015,41(04):67-73.
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液氧增压气体阀门肩圈的裂纹理化特性分析

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 41 期数: 2015年04期 页码: 67-73 栏目: 研究与设计 出版日期: 2015-09-30
Title:
Physicochemical characteristic analysis on shoulder ring flaw of pressure boost gas valve in liquid oxygen supply system
作者:
秦永涛; 高 强; 武荣艳; 杨战伟; 田宝云
西安航天动力试验技术研究所，陕西 西安 710100
Author(s):
QIN Yongtao;  GAO Qiang;  WU Rongyan;  YANG Zhanwei;  TIAN Baoyun
Xi’an an Aerospace Propulsion Test Technology Institute, Xi’an 710100, China
关键词:
裂纹; 应力腐蚀; 理化特性; 防范措施
Keywords:
flaw;  stress corrosion;  physicochemical characteristic;  precautionary measure
分类号:
V431-34
文献标志码:
A
摘要:
针对某发动机试验区的液氧供应系统增压气体阀门肩圈工作过程出现的裂纹现象，为保证气体供应正常，确立裂纹出现的主要原因，避免试车安全隐患，首先从宏观观察，对表面型貌和断面进行观察，然后对肩圈进行理化分析，从基体上确定材料成分，结合裂纹源区断口腐蚀形貌进行金相组织检查，确定裂纹腐蚀特性；对裂纹腐蚀特性进行材料成分、加工工艺、硬度进行检测，分析肩圈材料力学性能分析，并结合能谱分析、铁素体测量、残余应力分析，确定裂纹腐蚀特性根源与因素，同时结合有限元的应力分析，分析应力腐蚀的主要原因和诱导因素，研究肩圈裂纹的内在机理；在此基础上，制定使用过程的防范措施，确保使用过程的肩圈性能。
Abstract:
Aiming at the shoulder ring flaw phenomenon occurred in the working process of pressure boost gas valve of liquid oxygen supply system in a liquid rocket engine testing process, surface morphology and section morphology of valve shoulder ring flaw were checked by macroscopic observation, and physicochemical analysis of valve shoulder ring was performed to avoiding hidden danger in liquid rocket engine testing process, to assure the normal gas supply and determine the main source of flaw. The corrosion property was confirmed by observation of fracture corrosion morphology metallographic organization in flaw source zone and flaw expansion zone, and by material analysis of shoulder ring matrix. The material composition, processing technology and hardness were corrosion property were defined by energy spectrum analysis, ferrite measurement and remnants stress research. The main source and inducing factors of stress corrosion were determined by finite element analysis for further researching the inner mechanism of valve shoulder ring flaw. Finally, the precautionary measures of valve shoulder ring flaw were established to assure valve performance and provide a support for safety and reliability of liquid rocket engine testing process, and an approach for physicochemical characteristic analysis of others equipments.

参考文献/References:

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备注/Memo

收稿日期：2014-12-04；修回日期：2015-01-29 作者简介：秦永涛（1981—），男，工程师，研究领域为液体火箭发动机试验技术

更新日期/Last Update: 1900-01-01