How Is Tungsten Carbide Copper Rod Manufactured?

The production of tungsten carbide copper rod typically involves copper infiltration and powder metallurgy process, which is a method of manufacturing metal parts from metal powders. Here is a general overview of production steps:

1.Powder Mixing:

Tungsten powder and cobalt powder are accurately weighed and thoroughly mixed to achieve a homogenous blend. The content is determined based on the desired properties of the final alloy.

2.Compaction:

The mixed powders are pressed or compacted into a green compact. The compaction is typically done under high pressure to form a preliminary shape of the rod. This green compact retains its shape but is porous.

3.Pre-Sintering:

The green compact is pre-sintered in a furnace at a lower temperature than the final sintering temperature. This step helps to partially bond the particles and remove some of the porosity, making the structure more robust for the subsequent infiltration process.

4.Copper Infiltration:

The pre-sintered tungsten carbide compact is then infiltrated with molten copper. This process involves placing the pre-sintered compact in a furnace where copper is melted and drawn into the porous structure of the tungsten carbide. The copper infiltration fills the voids between tungsten carbide particles, creating a fully dense and integrated composite material.

5.Sintering:

The infiltrated compact is subjected to a final sintering process at a higher temperature. This step allows the tungsten carbide and copper to fully bond and results in the densification of the material. The sintering temperature is carefully controlled to avoid melting the copper.

6.Machining and Finishing:

The sintered WCu composite is machined to achieve the final dimensions and surface finish. Machining processes may include turning, milling, or grinding.

7.Quality Control:

The finished tungsten carbide copper rods undergo rigorous quality control checks to ensure they meet specified standards. This includes dimensional checks, hardness testing, and other quality assessments.

This powder metallurgy and copper infiltration process results in tungsten carbide copper rods with a uniform distribution of tungsten carbide particles in a copper matrix, providing a balance of hardness, wear resistance, and thermal and electrical conductivity. 

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