What is Tungsten?

by Christine Cora business man

Tungsten is a steel contains tungsten, together with these tungsten items containing tungsten 18%.

 

 

Tungsten Producers carbide, it truly is also called tungsten titanium. Its hardness is vickers 10K, and this hardness is after dianond. Just by way of this, many tungsten items (common are made by watch) has worn characteristic.

 

 

Tungsten Titanium Alloy is often used to make lathe tools, impact driller, glass sword drill, electroplating plus ceramic tile. It really is solid annealing sticking, but not very brittle, so it belong to rare metal.

 

 

Tungsten powder sintering molding is pressing, sintering into blank heated to a definite temperature (sintering temperature), maintain a certain volume of time (time), then heat cool, in order to obtain the required performance for Tungsten Metal Properties .

 

 

Tungsten sintering process can be divided into 4 basic phase:

 

 

1: removal forming agent, burn stage at this stage sinter happen below:

 

 

Molding agent, the sinter early removal with temperature, molding agent gradually decomposition or vaporization, eliminate the sinter, meanwhile, molding agent more or less to sinter, increased carbon footprints. With the molding, quantity and then sintering process associated with change. Powder surface oxides is reduced, in sintering temperature, hydrogen can restore cobalt together with tungsten oxide removal in vacuum forming, if the agent together with sintering, carbon plus oxygen reaction is not powerful. Powder particles. The contact stress gradually eliminate, binding metal powder began to reply coupled with recrystallization, surface, press block diffusion began to improve strength.

 

 

2: solid-phase sintering stage (800 eutectic temperature) --

 

 

In the temperature, the liquid used on a stage except continue the whole process of what happened, solid instead should really intensifies, plastic flow increase diffusion, sinter apparent shrinkage.

 

 

3: liquid sintering stage (eutectic temperature sintering temperature) --

 

 

When the sinter appears liquid, shrinkage, then produce crystals completed soon change, formed the basic structure and then organization related with alloys.

 

 

4: cooling stage (room) sintering temperature -

 

 

At this stage, the organization and also the phase composition tungsten steel cooling conditions and then with some change, can use this feature associated with tungsten steel heat to improve their physical and then mechanical properties.

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Created on Dec 31st 1969 18:00. Viewed 0 times.

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