What are the Properties of Tungsten Metal Powder?

The performance of tungsten metal powder greatly affects the processing performance and quality of subsequent products. Both the field of hard alloy and tungsten material processing have put forward corresponding requirements for the chemical purity and physical properties of raw tungsten powder, especially the increasingly high requirements for physical properties.

1、Chemical purity

When producing hard alloys and tungsten products, there is a high requirement for the chemical purity of tungsten powder. The residual impurity elements in tungsten powder have an impact on the processability and service performance of the product.

For example, in the process of producing tungsten powder using APT as raw material, the material comes into direct contact with calcination, reduction furnace tubes, and vessels, causing an increase in impurity content such as Fe, Ni, Cr, Si, and a decrease in chemical purity. Some of these impurity elements are brought in from raw materials, and some are caused by the falling off of vessel or furnace tube materials. When they reach a certain content or aggregate into a large enough size, they may become a defect source for subsequent processing or use.

The oxygen in tungsten powder can react with carbides, absorb the carbon in the carbides, and cause decarburization of hard alloys. When the alloy is severely decarburized, there will be phase trapping, making the alloy brittle; The gas released by the reaction increases the porosity in the alloy and reduces its strength. According to different reduction processes and equipment, the oxygen content in tungsten powder is generally between 0.05% and 0.5% (mass fraction), and increases with the decrease of tungsten powder particle size.

2、Physical property

The physical properties of metal tungsten powder mainly include average particle size, particle size distribution, particle aggregation degree, particle morphology, specific surface area, bulk density, tap density, Hall flow rate, etc.

Whether it is cemented carbide or tungsten products, there are strict requirements on the average particle size and particle size distribution of tungsten powder. In the field of cemented carbide, the particle size and particle size distribution of tungsten powder directly affect the particle size and particle size distribution of the wC powder produced. The particle size of wC powder affects the performance of cemented carbide products.

The fluidity of tungsten powder is affected by particle size, particle size distribution and particle morphology. The coarser the powder particle size, the rounder the particles, and the smoother the surface, the better the fluidity. The fluidity of tungsten powder is usually measured by the Hall flow rate, that is, the time it takes for 50g of tungsten powder to flow through the specified hole of the Hall flow meter. The fluidity of the powder directly affects the volume charge of the compaction process and the uniformity of the green compact density.

Qingdao Hesiway Industrial Co., Ltd. is a foreign trade company established by Qingdao Juxinyuan Industry and Trade Co., Ltd. to better serve foreign customers. The company specializes in the production of tungsten series products, and the particle size can be customized ac cording to customer requirements. If you want to know more about tungsten powder, welcome to consult us.

Company name：Qingdao Hesiway industrial Co., Ltd.

Mobile：186 6399 7859

Fax：86 0532 8766 3689

Tel：86 0532 8481 9182

Whatsapp：0086 - 17753259059

Facebook：0086 - 17753259059

Email：Develn@hswmatel.com

Company homepage：www.hswmatel.com

Address：Jihongtan Beiwan Industrial Park, Chengyang,District, Qingdao, Shandong, China