Microstructure characteristics of CBN/steel joints brazed with TiB2 modified active filler

被引：12

作者：

Ding, W. F. ^{[1
]}

Xu, J. H. ^{[1
]}

Chen, Z. Z. ^{[1
]}

Yang, C. Y. ^{[1
]}

Fu, Y. C. ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mech Engn, Nanjing 210016, Jiangsu, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2009年 / 25卷 / 12期

基金：

中国博士后科学基金;

关键词：

CBN grits; TiB2; particles; Active filler; Brazing interface; Microstructure characteristics; STEEL;

D O I：

10.1179/174328408X363353

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The joint of cubic boron nitride (CBN) grits to 0.45%C steel were obtained by using TiB2 modified Ag-Cu-Ti active filler at the brazing temperature of 920 degrees C for the holding time of 5 min. The microstructure characteristics of the brazing interface were detected by means of optical microscope, scanning electron microscope, energy dispersion spectrometer, X-ray diffraction and microhardness measuring equipment as well. It has been found that the microstructure of Ag-Cu-Ti filler layer is significantly refined by TiB2 particles. The almost well proportioned distribution of TiB2 particles in the filler layer is realised. Negative influence of TiB2 particles has not occurred on the chemical reaction of CBN particles and the filler at elevated temperatures. Reliable joining of CBN grits to 0.45%C steel is accomplished dependent on the resultant reaction products at the brazing interface.

引用

页码：1448 / 1452

页数：5

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