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| Research on the preparation of low melting point Cu-P-Sn-Ni base brazing powder |
| QIN Si-si, XIAO Ming-qing, WAN Ying-hao, ZENG Gui-yu |
| Hunan Research Institute of Metallurgy and Materials, Changsha 410000, China |
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Abstract In this paper, Cu-7%P-6.5%Sn-1.2%Ni (mass fraction) low melting point brazing alloy powder was prepared by vacuum atomization.The powder with reasonable particle size distribution and good liquidity was obtained by studying the influence of atomization pressure on powder particle size. The microstructure, chemical composition and melting range were analyzed by Scanning Electron Microscope (SEM), chemical analysis and Differential Scanning Calorimeter (DSC). Results show that the surface of atomization powder is smooth, the spherical degree is good, the composition is uniform and the deviation of P, Sn, Ni elements in alloy is small, the oxygen content is as low as 0.047%, the melting point of brazing powder is low, which began to melt at 608.69 ℃.
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Received: 01 August 2018
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2020, Vol. 30 
