铜镍锡合金粉末制备工艺及特性研究  

Study on preparation technology and properties of copper-nickel-tin alloy powder

作　　者：王思鸿 祝邦文 曹丽丽 唐卫岗 陈融 蒋金金 WANG Sihong;ZHU Bangwen;CAO Lili;TANG Weigang;CHEN Rong;JIANG Jinjin(School of Mechanical and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,Zhejiang,China;Hangzhou Huaguang Advanced Welding Materials Co.Ltd.,Hangzhou 311107,Zhejiang,China)

机构地区：[1]浙江科技学院机械与能源工程学院,杭州310023 [2]杭州华光焊接新材料股份有限公司,杭州311107

出　　处：《浙江科技学院学报》2020年第1期7-12,共6页Journal of Zhejiang University of Science and Technology

摘　　要：为获得性能良好的钎焊用铜镍锡合金粉末,在气雾化水冷制粉平台上试制了3种铜镍锡合金粉末,并对粉末的制备工艺、粉体特性及两者之间的影响关系进行研究。结果表明,冶炼合金时,合理的原料添加顺序能节省冶炼时间,减少氧化烧损;适当提高冶炼温度可以增加合金熔液的流动性,保证雾化过程的顺利完成;雾化时,若雾化气体压力较大则会在气流上方形成负压区,导致合金熔液上翻,控制雾化压力由小到大可以避免这种现象。最终获得的合金粉末球形度好,颗粒较细,-200目的粉末占60%以上,DTA曲线分析合金熔点在780~833℃,其特性能满足钎焊用粉的使用要求。In order to obtain sound Cu-Ni-Sn powders for brazing,three kinds of Cu-Ni-Sn alloy powders were prepared on the water-cooled gas atomization platform,elaborating upon the preparation process and properties of powder,and their interrelationship.The results show that the reasonable sequence of adding raw materials can save smelting time and reduce metallic oxidation loss in the process of smelting alloy.Appropriate increase of smelting temperature can enhance the fluidity of alloy melt,ensuring the smooth completion of atomization.When atomizing pressure being large in the process of atomization,the negative pressure zone will be formed above the airflow,leading to the upwelling of alloy melt.Therefore,controlling the atomizing pressure“from small to large”can avoid this phenomenon.The final alloy powders have high sphericity and fine grains,with powders of-200 mesh accounting for more than 60%.The melting point of the alloy analyzed by DTA curve is between 780 and 833℃.Its properties meet the requirements of brazing powders.

关 键 词：雾化法 制备工艺 铜镍锡合金粉末 

分 类 号：TG425.2[金属学及工艺—焊接]