M. Naka
,
J. Zhang
,
H. Y. Fang (1.Joining and Welding Research Institute
,
Osaka University
,
Japan 2)School of Materials Science and Engingeering
,
Harbin institute of Technology
,
Harbin 150001
,
China)
金属学报(英文版)
St3N4 ceramic was brazed using a filler of Cu - Zn - Ti alloy under the brazing condition of 1223K and 1.8ks. When the Ti content in the alloy is 20% at., the average shear strength of the joint is 265MPa. By using EPMA and XRD analysis, the metallurgical behavior of the interface between the filler alloy and Si3N4 matrix was studied,which affected the joint strength.It was found that with in- creasing Ti content from 5% to 20%at., the thickness of the brazing seam decreases and the amount of the reactant(Ti5Si3, TiN and Ti2N etc. ) increases,resulting in an obvious increase of the shear strength of the joint.
关键词:
Si_3N_4 ceramic
,
null
,
null
,
null
,
null
M. H. Guo
,
D. C. Shao
,
Z. G Dong and J. C Yang National Key Laboratory Advanced Welding Production Technology
,
Harbin institute of Technology
,
Harbin 150001
,
China
金属学报(英文版)
Manuscript received 30 July 1999 Abstract The shielded metal arc welding (SMAW) of a manganese steel part as a crossing of railway track to a carbon steel part as the rails of the railroad is the welding of dissimilar steel. It are was known that it is not possible to the the rail of railroad directly to the cross- ing of railway track made from a steel containing about 14% of manganese (wt. ) because of so many differences between the two kinds of steels such as composition, microstructure,mechanical properties and weldability.A method was used to solve the problem by presetting an intermediate layer on each side of the joint and other special procedures were used.The result of test indicated that a good weld joint was obtained.
关键词:
high manganese steel
,
null
,
null
,
null
