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气体流量对射频等离子体球化GH4169合金粉末的影响 预览

Effect of gas flow rate on the characteristics of RF plasma spheroidized GH4169 alloy powder
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摘要 采用射频等离子体球化技术对多次激光3D打印废弃的不规则GH4169合金粉末进行二次改造,研究载气、氢气流量对球化粉末效果的影响机理.利用扫描电镜、霍尔流动仪、振实密度测试仪及激光粒度分析仪对球化前后粉末的形貌、流动性、松装比及粒度分布进行分析.结果表明,载气流量越大,粉末在等离子体火焰中停留时间越短、运动絮乱,球化率越低;氢气流量越大,单位时间内等离子体与粉末热交换越大,球化生产效率越高.经球化处理的GH4169合金粉末的流动性、松装比得到了显著的改善,粉末颗粒平均粒径增加,粒径分布变窄. The secondary modification of irregular GH4169 alloy powder discarded from multiple laser 3 D printing by RF plasma technology. The influence mechanism of carrier gas and hydrogen flow on the effect of spheroidized powder was studied. Scanning electron microscopy, Hall flow meter, tap density tester, and laser particle size analyzer were used to analyze the morphology, fluidity, looseness ratio and particle size distribution of the powder before and after spheroidization. The results show that the larger the carrier gas flow rate, the shorter the residence time of the powder in the plasma flame, the chaotic motion, and the lower the spheroidization rate.The larger the hydrogen flow rate, the greater the heat exchange between plasma and powder per unit time, and the higher the spheroidization production efficiency.The fluidity and looseness ratio of the spheroidized GH4169 alloy powder is significantly improved, the average particle size of the powder particles increases, and the particle size distribution becomes narrow.
作者 尹燕 赵超 潘存良 路超 张瑞华 YIN Yan;ZHAO Chao;PAN Cunliang;LU Chao;ZHANG Ruihua(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;China Iron&Steel Research Institute Group,Beijing 100081,China;Hardware Knife Cut Industrial Technology Research Institute Yangjiang,Yangjiang 529533,China)
出处 《焊接学报》 EI CAS CSCD 北大核心 2019年第11期100-105,I0005,共7页 Transactions of The China Welding Institution
基金 广东省“扬帆计划”引进创新创业团队专项资助(2015YT02G090) 阳江市高功率激光应用实验室有限公司新型研发机构初创期建设补助(809099997119) 阳江市五金刀剪产业技术研究院新型研发机构初创期建设补助(809099997119)。
关键词 射频等离子体 GH4169合金粉末 气体流量 radio frequency plasma GH4169 alloy power gas flow
作者简介 第一作者:尹燕,女,1973年出生,博士,教授.主要研究方向为高效率焊接及激光增材制造技术.发表论文40余篇.Email:yinyan@lut.cn。
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