powder metallurgy materials

Powder metallurgy materials are not just iron-based materials. The main materials are:

  1. Cemented carbide: Cemented carbide is a material made by powder metallurgy with the powder of one or several refractory carbides as the main component, adding cobalt powder for bonding. Commonly used cemented carbides are divided into tungsten-cobalt, tungsten-cobalt-titanium, and tungsten-titanium-tantalum (niobium) based on their composition and performance characteristics. Carbide has high hardness, high thermal hardness, good wear resistance and high compressive strength, but low bending strength and poor toughness. Good corrosion resistance and oxidation resistance. The linear expansion coefficient is small, but the thermal conductivity is poor.
  2. Powder metallurgy anti-friction materials: Powder metallurgy is divided into iron-based materials and copper-based materials according to different main elements added to the matrix. Commonly used iron-based anti-friction materials include iron-graphite powder alloy and iron-sulfur-graphite powder alloy. The structure of the former is pearlite matrix + ferrite + cementite + graphite + pores; the structure of the latter, in addition to being the same as the former, also has sulfides, which can further improve friction reduction. Powder metallurgy anti-friction materials are generally used to manufacture medium-speed, light-load bearings. They are especially suitable for manufacturing bearings that cannot be refueled frequently, such as bearings for textile machinery, film machinery, food machinery, household appliances, etc., in automobiles, tractors, machine tool motors, etc. There are also applications.
  3. Powder metallurgy structural materials: Powder metallurgy structural materials are divided into iron-based and copper-based materials according to different base metals. Compared with iron-based structural materials, copper-based structural materials have lower tensile strength, higher plasticity and toughness, good electrical conductivity, thermal conductivity and corrosion resistance. They can be subjected to various plating treatments and are often used to manufacture products with smaller volumes and complex shapes. , instrument parts and electrical and mechanical product parts with high dimensional accuracy and small stress, such as small module gears, cams, fasteners, valves, pins, sleeves and other structural parts.
  4. Powder metallurgy friction materials: Powder metallurgy friction materials are divided into iron-based and copper-based materials according to different base metals. They are divided into dry and wet materials according to different working conditions. Wet materials are suitable for working in oil. Powder metallurgy friction materials are mainly used to make clutches and brakes on machine tools, tractors, automobiles, mining vehicles, construction machinery and aircraft. The process is also very difficult. You can’t do it just by buying better equipment as the poster said. Of course, I don’t object. Good equipment can produce products with good stability and high precision.
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