|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.

References:

[1] 谭松林,李宝盛.液体火箭发动机可靠性[M].北京:中国宇航出版社,2014.
[2] 朱耀龙,李护林,郭国长,等.液体火箭发动机工艺与过程关键特性研究[J].火箭推进,2014,40(6):64-68,73.ZHU Y L,LI H L,GUO G C,et al. Research on key features of liquid rocket engine manufacturing technique and process[J].Journal of Rocket Propulsion,2014,40(6):64-68,73.
[3] 李向阳,王晓锋,宣统,等. 液氧/煤油发动机煤油预压涡轮泵技术[J].火箭推进,2009,35(1): 16-20.LI X Y,WANG X F,XUAN T,et al. Techniques of kerosene booster turbopump for LOX/kerosene staged combustion cycle engine[J].Journal of Rocket Propulsion,2009,35(1): 16-20.
[4] 崔约贤,王长利.金属断口分析[M].哈尔滨:哈尔滨工业大学出版社, 1998.
[5] 刘道新, 马宗耀, 何家文, 等.钛合金的银脆、镉脆敏感性及其控制[J].材料工程, 1998, 26(8):20-24.
[6] 陶春虎, 刘庆瑔, 刘昌奎,等.航空用钛合金的失效及其预防[M].北京:国防工业出版社,2013.
[7] 张利军, 何春艳, 薛祥义, 等.钛合金冶金缺陷实例分析[J].理化检验(物理分册), 2013, 49(12):819-822.
[8] 王海杰, 王佳, 彭欣, 等.钛合金在3.5%NaCl溶液中的腐蚀行为[J].中国腐蚀与防护学报, 2015, 35(1):75-80.
[9] 陈星, 董志国, 姜涛, 等.富氧α层对钛合金直角接头开裂的影响[J].失效分析与预防, 2011, 6(3):178-181, 198.
[10] 何磊.钛合金海水管路腐蚀与污损防护研究进展[J].材料开发与应用, 2017, 32(3):121-126.
[11] 刘彦杰, 杨俊, 吴建军, 等. 钛合金喷注器扩散钎焊失效分析与改进研究[J].火箭推进, 2012, 38(4): 60-67.LIU Y J, YANG J, WU J J, et al. Failure analysis and improvement on diffusion brazing of titanium alloy injector[J].Journal of Rocket Propulsion, 2012, 38(4): 60-67.
[12] WANG H J, WANG J, PENG X, et al. Corrosion behavior of three titanium alloys in 3.5%NaCl solution[J]. Journal of Chinese Society for Corrosion and Protection, 2015, 35(1): 75-80.
[13] XING W, DUAN D P, GUO Y S. Effect of titanium content on the microstructure and mechanical properties of tungsten-titanium alloy[J]. Rare Metal Materials and Engineering, 2013, 42(6): 1108-1112.
[14] 张喜燕, 赵永庆, 白晨光.钛合金及应用[M].北京:化学工业出版社, 2005.
[15] 曾尚武, 江海涛, 赵爱民.TC4钛合金高温氧化行为[J].稀有金属材料与工程, 2015, 44(11):2812-2816.

Memo

Memo:
-
Last Update: 2019-12-20