摘要
为了满足液体火箭发动机燃烧室内壁的使用需求,根据其生产工况,开展了Cu-Cr-Zr合金材料组织性能控制方面的基础研究。研究了不同低温变形量与热处理工艺以及钎焊与焊后热处理工艺对合金微观组织、显微硬度及力学性能等的影响。试验结果表明:Cu-Cr-Zr合金是一种典型的形变和析出复合强化的合金材料,热处理与变形对合金的组织性能影响较大,适当地增加低温变形量能够显著提高合金的力学性能;钎焊后,合金的强度和显微硬度显著降低,但是,合金钎焊后再进行热处理,可以使合金的性能得到部分恢复。研究结果为优化发动机燃烧室内壁的旋压变形及热处理工艺流程提供了理论支撑。
In order to meet the use needs of combustion chamber inwall of liquid rocket engine, according to its production conditions, the basic research on the control of microstructure and properties for Cu-Cr-Zr alloy material was carried out, and the influences of different low temperature deformation amounts and heat treatment processes as well as brazing and post-welding heat treatment processes on the microstructure, microhardness and mechanical properties of the alloy were investigated. The experimental results show that Cu-Cr-Zr alloy is a typical alloy material reinforced by deformation and precipitation, and heat treatment and deformation have a great influence on the microstructure and properties of the alloy. The mechanical properties of the alloy can be significantly improved by appropriately increasing the low temperature deformation amount, and after brazing, the strength and microhardness of the alloy are significantly reduced. However, the properties of the alloy can be partially recovered by the heat treatment after brazing. Thus, the research results provide a theoretical support for optimizing the spinning deformation and the heat treatment process flow of the engine combustion chamber inwall.
作者
张恒
阳代军
徐坤和
孙国辉
淡婷
马丽翠
Zhang Heng;Yang Daijun;Xu Kunhe;Sun Guohui;Dan Ting;Ma Licui(Capital Aerospace Machinery Corporation Limited,Beijing 100076,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2022年第11期214-221,共8页
Forging & Stamping Technology
关键词
低温变形量
热处理
钎焊
CU-CR-ZR合金
微观组织
力学性能
low temperature deformation amount
heat treatment
brazing
Cu-Cr-Zr alloy
microstructure
mechanical properties
