Powder metallurgy is to use metal powder as raw material and makes it into what we need by some process. In this article, you can see the advantages and disadvantages of powder metallurgy.
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What is powder metallurgy?
Powder metallurgy is an industrial technology to manufacture metal materials, composite materials, and other kinds of products after a series of the manufacturing process, including preparing raw materials, compacting, and sintering. Tungsten carbide products are manufactured by powder metallurgy. When manufacturing tungsten carbide products, we have to purchase high-quality tungsten carbide powder first and mix it with cobalt powder, which is used as binder powder. After that, we should mill them in a ball mill machine, press mixed power into a certain shape and size, sinter in furnaces, and check quality. Besides tungsten carbide products, powder metallurgy can also be used in transportation, machinery, aerospace, new energy, telecommunication, electronics, and so on.
Advantages of powder metallurgy
1. Powder metallurgy can be used to manufacture some special materials, such as refractory metals, compounds, and porous materials;
2. Powder metallurgy can save costs and reduce losses. By powder metallurgy, we can get the products after sintering without the need for further processing, which can greatly reduce the cost and losses;
3. By powder metallurgy, we can get high-purity products. This is because powder metallurgy does not need to melt materials in manufacturing, so no impurities will exist. In addition, sintering is finished in a vacuum and reducing atmosphere so that we do not have to worry about oxidation and impurities;
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4. Powder metallurgy can be used to produce a bulk of products in the same shape, which can greatly reduce costs.
Disadvantages of powder metallurgy
At the same time, powder metallurgy has its disadvantages:
1. Products made of powder metallurgy have poor toughness and strength. And the pores in the compact can not be completely eliminated;
2. Powder metallurgy is not suitable for manufacturing large products. The fluidity of metal powder is worse than that of molten metal, so its shape and size will be limited to a certain extent;
3. Dies used in metallurgy are expensive. The cost of dies is high, so they are suitable for high-volume production.
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