Effect of brazing temperature on microstructure and properties of 1Cr18Ni9Ti stainless steel brazed by amorphous BNi-2 filler

被引：0
|
作者：
Tian X. [1 ]
Zhang Z. [1 ]
Zhou C. [1 ]
Zhao L. [1 ]
Tian Y. [1 ]
Fu W. [2 ]
Song X. [2 ,3 ]
机构：
[1] Beijing Institute of Control Engineering, Beijing
[2] National Key Laboratory of Precision Welding, Joining of Materials and Structures, Harbin Institute of Technology, Harbin
[3] Shandong Institute of Shipbuilding Technology, Weihai
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2024年 / 45卷 / 06期
关键词：
amorphous filler; brazing; diffusion activation energy; microstructure; stainless steel;
D O I：
10.12073/j.hjxb.20230620001
中图分类号：
学科分类号：
摘要：
1Cr18Ni9Ti stainless steel was successfully brazed with BNi-2 amorphous filler. The interfacial microstructure of brazed joints at different brazing temperatures was characterized and analysed by scanning electron microscope and energy dispersive spectrometer, and the shear strength of brazed joints was tested. The effect of brazing temperatures on the interfacial microstructure and mechanical properties of the joints was investigated. The results showed that the interfacial microstructure of brazed joints could be divided into three regions from the brazing seam centre to the base material, when the brazing temperature was 1050 ℃, the brazing seam region was mainly Ni-based solid solutions + Cr-B phases; the diffusion region was distributed with Fe-Ni solid solution and fine strips of σ-FeCr phase; and in the intergranular infiltration region, the austenite grain boundaries were distributed with the σ-FeCr phases and the Cr-B phases. As the brazing temperature increased, the diffusion rate of B element was accelerated and the intergranular infiltration of Cr-B phases was intensified; the massive Cr-B phases in the centre of the braze were gradually reduced until they disappeared at 1 150 ℃, and the microstructure of the braze area was homogenised. Under the effect of temperature, the width of the brazed joints showed a tendency to decrease and then increase. And the shear strength of the joints showed a tendency of increasing and then decreasing; the maximum shear strength appeared at 1 050 ℃, about 265 MPa; and the fracture form of the joints was mainly dominated by ductile fracture. Using the Arrhenius equation the diffusion activation energy of the B atom was obtained as 8.18 × 104 × n J/mol, with n being the time index. Highlights: (1) The brazed joints of 1Cr18Ni9Ti stainless steel were realized by using amorphous BNi-2 brazing material, and good brazed joints were obtained. (2) The effect of brazing temperature on the microstructure and mechanical properties of 1Cr18Ni9Ti stainless steel joints was investigated. (3) The diffusion activation energy of B element in 1Cr18Ni9Ti was calculated. © 2024 Harbin Research Institute of Welding. All rights reserved.
引用
收藏
页码：61 / 67
页数：6
相关论文
共 16 条
  • [1] Zhang Zhiqiang, Zhang Yuhang, Zhang Hongwei, Et al., Micro-structure and corrosion resistance of UNS S32750 super duplex stainless steel laser welded joint, Transactions of the China Welding Institution, 44, 4, pp. 14-20, (2023)
  • [2] Han Wenqian, Dong Honggang, Ma Yueting, Et al., Vacuum brazing TC4 titanium alloy/316L stainless steel with Ti43.76Zr12.50Cu37.49-xNi6.25Cox amorphous filler metals, Transactions of the China Welding Institution, 45, 1, pp. 47-57, (2024)
  • [3] Mu G Q, Qu W Q, Zhang Y H, Et al., Effect of Ni on the wetting and brazing characterization of 304 stainless steel by Ag–Cu alloy[J], Journal of Materials Science, 58, 14, pp. 6297-6312, (2023)
  • [4] Xu Z Y, Chen H Q, Qu Z Y, Et al., Nondestructive testing of local incomplete brazing defect in stainless steel core panel using pulsed eddy current, Materials, 15, 16, (2022)
  • [5] Kim M, Jeong H, Awais A A, Et al., Experimental and numerical study on the thermal and hydraulic characteristics of porous-media heat exchangers in cryogenic conditions, Applied Thermal Engineering, 216, (2022)
  • [6] Zhou L C, Zhao T X, Yu Y Q, Et al., Effect of laser shock peening on high-cycle fatigue performance of 1Cr18Ni9Ti/GH1140 weld, Metals, 12, (2022)
  • [7] Li Z L, Shi H C, Zhang P L, Et al., Progress, applications, and perspectives of titanium-based braze filler metal: a review, Journal of Materials Science, 58, 38, pp. 14945-14996, (2023)
  • [8] Cui B, Song L Y, Liu Z W, Et al., Study of the morphology and properties of diamond joints brazed with carbide-reinforced Cu-Sn-Ti filler metal[J], China Welding, 31, 3, pp. 53-60, (2022)
  • [9] Jiang Hong, Zhang Lijing, Yang Jing, Vacuum brazing of stainless steel, Vacuum Metallurgy Committee of China Vacuum Society. Proceedings of 2004 National Symposium on Vacuum Metallurgy and Surface Engineering, pp. 102-106, (2004)
  • [10] Ma H Y, Liu Z P, Zhou G Y, Et al., Study on element diffusion behaviour of vacuum-furnace brazing 316L/BNi-2 joints based on boltzmann-matano model[J], Welding in the World, 65, pp. 2239-2246, (2021)
12