航天推进技术研究院主办
[1]宋 凡,周 杰,徐晓丹,等.轨控发动机不锈钢喷注器扩散钎焊工艺[J].火箭推进,2021,47(01):90-96.
SONG Fan,ZHOU Jie,XU Xiaodan,et al.Process of TLP welding of stainless steel injector in orbit-control engine[J].Journal of Rocket Propulsion,2021,47(01):90-96.
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SONG Fan,ZHOU Jie,XU Xiaodan,et al.Process of TLP welding of stainless steel injector in orbit-control engine[J].Journal of Rocket Propulsion,2021,47(01):90-96.
轨控发动机不锈钢喷注器扩散钎焊工艺
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
47
期数:
2021年01期
页码:
90-96
栏目:
工艺与材料
出版日期:
2021-02-28
- Title:
- Process of TLP welding of stainless steel injector in orbit-control engine
- 文章编号:
- 1672-9374(2021)01-0090-07
- Keywords:
- injector; TLP welding; process; Nickel-base solder; intermediate layer
- 分类号:
- TG456.7
- 文献标志码:
- A
- 摘要:
- 为研制新型轨控发动机所用的喷注器,对不锈钢环槽多层板进行了扩散钎焊工艺研究。随着焊接温度和保温时间的增加,焊缝与母材间各元素的扩散程度逐渐加深; 扩散未完全时焊缝由靠近母材的固溶体和中部的化合物组成,扩散完全时焊缝全部由固溶体组成。中间层内Ni、Si、B向母材扩散,母材内Fe向中间层扩散; Ni、Fe、B扩散速度较快,Si扩散速度较慢; Si和B的含量决定组织形态,Ni的含量影响接头强度。接头抗拉性能与扩散程度成正相关,其极限值已达母材的101%; 接头断口形貌最初为准解理完全脆断,随后发展到细韧窝部分塑断,最终呈现为大韧窝完全塑断。对于40 μm厚的B—Ni2中间层,最佳焊接温度、保温时间和加载压强分别为1 050～1 075 ℃、2 h和0.01～0.02 MPa。最佳工艺参数先后成功应用于模拟件和产品,焊接的某新型发动机已通过试车考核。
- Abstract:
- In order to develop the injector for the new orbit-control engine, the process of TLP welding of the stainless steel ring groove multilayer board was studied. With the increase of welding temperature and holding time, the diffusion of elements gradually deepens. When the diffusion is incomplete, the weld is composed of the solid solution in the edge and the compound in the middle. When the diffusion is complete, the weld is entirely composed of the solid solution. The Ni, Si and B gradually decrease, while the Fe gradually increases in the weld. The diffusion rate of Ni, Fe and B is faster, while the rate of Si is slower. The content of Si and B determines the structure, and the content of Ni affects the tensile properties. The tensile properties increase with the degree of diffusion, and the performance of the best joint can reach 101% of the base material. The fracture morphology changed from intergranular complete brittle fracture to partial plastic fracture of small tough dimples, and finally showed complete plastic fracture of larger tough dimples. For the B-Ni2 intermediate layer with a thickness of 40 μm, the optimal welding temperature, holding time and loading pressure are 1 050～1 075 ℃, 2 h and 0.01～0.02 MPa, respectively. The best parameters have been successfully applied to simulation parts and products, and a new welded orbit-control engine has passed the test.
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备注/Memo
收稿日期:2020-05-13
基金项目:上海市科学技术委员会资助课题(17DZ2280800)
作者简介:宋凡(1989—),男,硕士,研究领域为空间推进系统焊接工艺技术。
更新日期/Last Update:
2021-02-20