Microstructure and Properties of Induction Brazing of TC4 Titanium Alloy/316L Stainless Steel Joint

doi:10.7652/xjtuxb202310015

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Microstructure and Properties of Induction Brazing of TC4 Titanium Alloy/316L Stainless Steel Joint

更新时间：2025-05-08

- Microstructure and Properties of Induction Brazing of TC4 Titanium Alloy/316L Stainless Steel Joint
- Vol. 57, Issue 10, Pages: 153-162(2023)
- 作者机构：
  
  西安交通大学金属材料强度国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202310015
  CLC： TG454
- Online First：10 October 2023，
  
  Published：2023
- 稿件说明：
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Microstructure and Properties of Induction Brazing of TC4 Titanium Alloy/316L Stainless Steel Joint[J]. 2023, 57(10): 153-162.
DOI：

Microstructure and Properties of Induction Brazing of TC4 Titanium Alloy/316L Stainless Steel Joint[J]. 2023, 57(10): 153-162. DOI： 10.7652/xjtuxb202310015.

摘要

为降低钛合金与不锈钢钎焊的工艺成本与钎料成本

采用自主设计制备的Cu-Mn-Ni钎料

在低成本保护气氛氩气下对TC4钛合金与316L不锈钢进行感应钎焊

并从润湿性、接头显微组织与力学性能方面研究其可行性

揭示了界面反应的特征与机制。试验结果表明:钎料对TC4钛合金与316L不锈钢的润湿性优异

两侧接触角分别为8°、12°与6°、7°; 在钎焊温度为900和930 ℃下保温1 min后

接头处的显微组织为TC4/(α+β)Ti/βTi/(βTi+Ti

Cu)+Ti

Cu/FeTi/γFe/316L; 在钎焊温度为960 ℃下保温1 min后

显微组织为TC4/(α+β)Ti/βTi/βTi+(βTi+FeTi)/FeTi/γFe/316L; 随着钎焊温度升高

接头的抗剪强度先增大后减小

钎焊温度为930 ℃时

保温1 min后接头的抗剪强度达到最大值155 MPa; 断口分析表明316L不锈钢侧为接头的薄弱区域

断裂发生在FeTi扩散层与临近的Ti

Cu相内(900和930 ℃)

或更厚更硬的FeTi扩散层内(960 ℃)。

Abstract

To reduce the cost of filler metals and the manufacturing process for brazing titanium alloy and stainless steel

a study was conducted on the induction brazing of TC4 titanium alloy and 316L stainless steel using Cu-Mn-Ni filler metal and low-cost argon protection. The feasibility of this approach was investigated based on wettability

joint microstructure

and mechanical properties

and the characteristics and mechanism of the interfacial reaction were examined. The results

show that the filler metal exhibited excellent wettability with the contact angles of 8°

12° and 6°

7° on the surfaces of TC4 titanium alloy and 316L stainless steel

respectively. The brazed joint's microstructure was observed to consist of TC4/(α+β)Ti/βTi/(βTi+Ti

Cu)+Ti

Cu/FeTi/γFe/316L after being brazing at a low temperature of 900°C and 930°C for one minute. At a higher temperature of 960°C for one minute

the microstructure was composed of TC4/(α+β)Ti/βTi/βTi+(βTi+FeTi)/FeTi/γFe/316L. With increasing brazing temperature

the shear strength of the joint initially increased and then decreased. The maximum shear strength of 155 MPa was obtained at 930 ℃ for 1 minute. Fracture analysis indicated that the 316L stainless steel side was the weak area of the joint

with fractures occurring between the FeTi diffusion layer and the adjacent Ti

Cu at 900 ℃ and 930 ℃

or within thicker and harder FeTi diffusion layer at 960 ℃.

关键词

Keywords

references

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