Application Of Tungsten Carbide and Precautions for Health Protection

       

Tungsten carbide can be used in the following
aspects:

1. It is widely used as high-speed
cutting tools, kiln structural materials, jet engine parts, cermet materials,
resistance heating elements, etc.

2. It is used for manufacturing
cutting tools, wear-resistant parts, melting crucibles of copper, cobalt,
bismuth and other metals, and wear-resistant semiconductor films.

3. Used as superhard tool material
and wear-resistant material. It can form solid solution with many carbides.
Tungsten carbide tic co cemented carbide tools have been widely used.

4. As a modified additive of nbc-c
and tac-c ternary system carbides, it can not only reduce the sintering
temperature, but also maintain excellent properties. It can be used as
aerospace materials.

Toxicity of tungsten carbide and
precautions for health protection:

1. Tungsten carbide dust can cause
bronchitis, bronchiolitis, closed bronchiolitis and atrophic emphysema.

2. Tungsten carbide will cause the
proliferative reaction of lymphoid tissue cells in the lung and gradually
harden. The vessel wall thickened and homogenized.

3. People exposed to tungsten carbide
dust at work have gastrointestinal dysfunction, kidney stimulation and
catarrhal inflammation of upper respiratory tract.

Therefore, in the environment that can contact
tungsten carbide powder, it is necessary to use qualified gas masks, dust-proof
clothes, gloves and glasses. Dust leakage shall be prevented at all stages of
tungsten carbide powder production. Workers shall have a pre employment
physical examination, which shall be checked regularly every year. When workers
have obvious symptoms of upper respiratory tract, they should temporarily
transfer to work and get out of contact with tungsten. In case of pulmonary
sclerosis or external respiratory dysfunction, they shall be transferred from
their posts.

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