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Effects of Heating Temperature on Interfacial Microstructure and Compressive Strength of Brazed CBN-AlN Composite Abrasive Grits 被引量:4

Effects of Heating Temperature on Interfacial Microstructure and Compressive Strength of Brazed CBN-AlN Composite Abrasive Grits
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摘要 CBN-AlN composite abrasive grits and AISI 1045 steel were brazed using Ag-Cu-Ti active filler alloy by heating up to the temperature of 890,900 and 920 ℃,respectively,and then held at the temperature for 8 min.Optical microscope,scanning electron microscope and X-ray diffraction equipment were utilized to study the effects of heating temperature on the microstructure of the joining interface.The compressive strength of the brazed composite grits was also measured.The experimental results show that the atoms of Ti,Al,B and N have preferentially penetrated towards the joining interface of composite grits and filler alloy.The compounds of Ti-nitride,Ti-borides and Ti3AlN were formed in the reaction layer.Degradation effect was not made on the compressive strength of the CBN-AlN composite grits when the brazing process was carried out in the temperature range of 890-920 ℃. CBN-AlN composite abrasive grits and AISI 1045 steel were brazed using Ag-Cu-Ti active filler alloy by heating up to the temperature of 890,900 and 920 ℃,respectively,and then held at the temperature for 8 min.Optical microscope,scanning electron microscope and X-ray diffraction equipment were utilized to study the effects of heating temperature on the microstructure of the joining interface.The compressive strength of the brazed composite grits was also measured.The experimental results show that the atoms of Ti,Al,B and N have preferentially penetrated towards the joining interface of composite grits and filler alloy.The compounds of Ti-nitride,Ti-borides and Ti3AlN were formed in the reaction layer.Degradation effect was not made on the compressive strength of the CBN-AlN composite grits when the brazing process was carried out in the temperature range of 890-920 ℃.
作者 丁文锋
出处 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第6期952-956,共5页 武汉理工大学学报(材料科学英文版)
基金 Funded by the National Basic Research Program of China (No.2009CB724403) the National Natural Science Foundation of China (No.51005116) the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT0837) the NUAA Research Funding (No. 2010236)
关键词 CBN-AlN composite grits interfacial microstructure compressive strength Ag-Cu-Ti filler alloy CBN-AlN composite grits interfacial microstructure compressive strength Ag-Cu-Ti filler alloy
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