Properties of Silver Brazing Alloys Containing Lithium / Właściwości Spoiw Srebrnych Do Lutowania Twardego Z Dodatkiem Litu

Archives of Metallurgy and Materials

W. Gąsior¹  A. Winiowski² 

[1] INSTITUTE OF METALLURGY AND MATERIALS SCIENCE POLISH ACADEMY OF SCIENCES, 31-982 KRAKÓW, 25 REYMONTA STREET STR., POLAND;INSTITUTE OF WELDING, 44-100 GLIWICE, 16-18 B?. CZES?AWA STREET STR., POLAND

关键词: Keywords: brazing;    vacuum brazing;    silver brazing alloys containing lithium;    brazing properties;    strength of brazed joints of stainless steel;   

DOI  :  10.2478/v10172-012-0121-5

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The analysis of the influence of lithium on wetting properties of Ag-Cu brazing alloys and the shear strength of stainless steel/braze/stainless steel joint was conducted. The brazing alloys of designations and composition according to ANSI/AWS A5.8: BAg-8a (71÷3 wt.% Ag, 0.25÷0.50 wt.% Li, Cu) and BAg-19 (92÷93 wt.% Ag, 0.15÷0.30 wt.% Li, Cu) and a braze alloy containing 70÷72 wt.% Ag, 0.6÷0.7 wt.% Li and Cu were subjected to the investigations. The wettability properties of the brazing silver alloys were examined in a spread test. The shear strength of joints were measured on the joints of stainless steel in the tensile test. The comparison of results showed a beneficial effect of lithium on the spreading properties and the wettability of braze alloys as well as the quality and shear strength of the brazed joints. The observed slag inclusions in the solid braze did not affect considerably the mechanical properties of the prepared joints because of the intensive deoxidation of the brazing surfaces of stainless steel elements.

【 授权许可】

Unknown