Effect of Temperature on Microstructure and Mechanical Properties of 316L Stainless Steel Brazed Joints

Abstract:

The effects of brazing temperature on microstructure and mechanical properties of vacuum brazed joints of 316L stainless steel were studied. Choose three soldering temperature. After soldering, observed the microstructure, element distribution, microhardness and shear strength of welding clearance. The results show that the welding temperature for 940 °C, the brazing clearance organization mainly by Ni-Cr-P phase composition. Joint performance is poor, element can't get enough spread. P element does not spread easily, mainly in the brazing clearance; Cr element can spread along the grain boundary into mother material; the ability of spread of Ni elements is less than the Cr element. While welding temperature of 970 °C, the shear strength is the highest, and the comprehensive performance is the best.

• Periodical: Advanced Materials Research (Volumes 418-420)
• Pages: 1494-1497
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.418-420.1494
• Online since: December 2011
• Authors: Xiao Long Gu, Chang Jin Yang, Zhuo Jun Chen, Cheng Dong Wu, Long Long Feng
• Keywords: Brazing Temperature, NiCrP Solder, Vacuum Brazing, Weld Seam Microstructure

References

[1] Shitian Liu, Kaizhen Yang. Holding time and Soldering Temperature influence on the performance of joints of Vacuum brazing 304 stainless steel [J]. Metal Casting and Welding Technology, 2011, 40, (5). In Chinese.

[2] Zhishui Yu, Kun Shi, Ruifeng Li. Brazing Temperature influence on Ni-based alloy vacuum brazing joint hardness and organization [J]. Metal Casting and Welding Technology, 2009, 38, (17): 116-119. In Chinese.

[3] Jianmin Chen. Study on law of compounds phase in the clearance of BNi-2 vacuum brazing stainless[J]. Journal of Oil University, 2000, (5): 80-83. In Chinese.

[4] Jianyong Zhu, Xuanhui Qu, Huosheng He. The Performance of the Solder Powder BNi-2 [J].Hunan metallurgy, 2004, (6): 6-9. In Chinese.