Brazed joints of CBN grains and AISI 1045 steel with AgCuTi-TiC mixed powder as filler materials |
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Authors: | Wen-feng Ding Jiu-hua Xu Zhen-zhen Chen Hong-hua Su Yu-can Fu |
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Institution: | (1) College of Mechanical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China |
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Abstract: | The brazing process of cubic boron nitride (CBN) grains and AISI 1045 steel with AgCuTi-TiC mixed powder as a filler material
was carried out. The joining strength and the interfacial microstructure were investigated. The experimental results indicate
that the spreading of the molten filler material on AISI 1045 steel is decreased with the increase of TiC content. A good
interface is formed between the TiC particulates and AgCuTi alloy through the wetting behavior. In the case of AgCuTi+16wt%
TiC, the strength of the brazed steel-to-steel joints reached the highest value of 95 MPa dependent upon the reinforcement
effect of TiC particles within the filler layer. Brazing resultants of TiB2, TiB, and TiN are produced at the interface of the CBN grains and the AgCuTi-TiC filler layer by virtue of the interdiffusion
of B, N, and Ti atoms. |
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Keywords: | |
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