Procedure to Make Tungsten Carbide Cutting Tools Ⅳ

In last part we know that tungsten carbide grain size is key to the properties of final tungsten carbide cutting tools, together with additives such as binder cobalt, carbides of titanium, tantalum, niobium, etc. Here we explain the process of mixing up.

Mixing Up

All these ingredients used to make tungsten carbide are blended with a liquid such as alcohol or hexane and placed in a mixing vessel, often a rotating drum called a ball mill. In addition to the grade ingredients, cemented balls 1/4″ to 5/8″ in diameter are added, to help the process of adhering the cobalt to the tungsten carbide grains. A ball mill may be as small as five inches in diameter by five inches long, or as large as a 55-gallon drum.

When the mixing is complete, the liquid must be removed. This typically happens in a spray dryer, which looks like a stainless steel silo. An inert drying gas, nitrogen or argon, is blown from the bottom up. When all the liquid is removed, the remaining dry material is “grade powder,” which looks like sand. The level of mixing up all ingredients affects the uniformity of grade powder and then finally has great effect on the final tungsten carbide cutting tools.

(To be continued-This article is divided into several parts and this is part 4, for part 3 please refer to http://news.chinatungsten.com/en/tungsten-information/80247-ti-10323; for part 5 please refer to http://news.chinatungsten.com/en/tungsten-information/80275-ti-10328)

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

• < Prev
• Next >