等离子旋转电极雾化制备H13合金特种粉的特性表征
Characterization of H13 alloy special powders prepared by plasma rotating electrode atomization
乔振兴 1刘增林 2张德金 3孙静 1陈琳琳 1阚洪程2
作者信息
- 1. 山东鲁银新材料技术研发有限公司,山东济南 250100
- 2. 山东鲁银新材料技术有限公司,山东钢城 271104
- 3. 山东鲁银新材料技术研发有限公司,山东济南 250100;山东鲁银新材料技术有限公司,山东钢城 271104
- 折叠
摘要
本文介绍了一种等离子旋转电极雾化法制备H13合金特种粉末的生产工艺,包括原料准备、雾化、粉末分级等工序,采用扫描电镜、粒度分析仪、氮硫仪、ICP、霍尔流速计和松装密度仪对粉末的形貌、粒度、成分、流动性和松装密度进行了测试,并与国内某公司采用气雾化方法生产的粉末做了比较.结果表明:等离子旋转电极雾化法生产的H13合金粉末表面质量优异,粉末球形度较高,表面光洁,几乎没有卫星粉、粘连粉和空心粉,表面形貌主要为细的枝晶组织,组织均匀;粉末物理性能优异,松装密度高,可达到4.6g/cm3,流动性好,为12.8s/50g;粉末粒度集中分布,特定尺寸的粉末收得率较高,但细粉的收得率不高,还需进一步优化工艺.气雾化方法制备的H13合金粉末表面质量较差,有较多的卫星粉、异形粉和粘连粉,表面缺陷较多;物理性能较差,流动性和松装密度均不及粉末产品要求.
Abstract
This paper describes a production process for the preparation of H13 alloy special powders by plasma rotating electrode atomization(PREP),including raw material preparation,atomization,and powder grading.The morphology,particle size,composition,fluidity and bulk density of the powder were tested by using scanning electron microscope,particle size analyzer,nitrogen-sulfur meter,ICP,Hall flow meter and bulk density meter.And a comparison was made with the powder produced by a domestic company using aerosolization(AA).The result shows that the surface quality of H13 alloy powder produced by PREP is excellent,with high powder sphe-ricity,clean surface and almost no satellite powder,adhesive powder and hollow powder.The surface morpholo-gy is mainly fine dendritic organization with uniform organization.The physical properties of the powder are ex-cellent,with high bulk density(4.6 g/cm3)and good flowability(12.8 s/50g).The particle size of the powder is centrally distributed,and the yield of the powder of specific size is high.However,the yield of fine powder is not high,and further optimization of the process is needed.The surface quality of H13 alloy powder prepared by AA is poor,with more satellite powder,shaped powder and adherent powder,and more surface defects.In addition,the physical properties are poor,and the fluidity and bulk density are not as good as the requirements of powder products.
关键词
等离子旋转电极雾化/H13/合金粉末/粉末形貌/冶金Key words
PREP/H13/alloy powder/powder morphology/metallurgy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据