福建APPLICATION OF MIM IN AUTOMOBILE PARTS

At present, the demand for MIM products in the automotive manufacturing field is very wide worldwide. As a near net forming process, MIM products have high density, good mechanical properties and high surface finish. The advantages of low cost, light weight, short process and less processing volume perfectly match the development trend of the automobile industry, so they are favored by the automobile industry.

China has become the world's largest automobile producer. The consumption of powder metallurgy products for each automobile is 14 kg in Europe, 16 kg in Japan and 19.5 kg in the United States. At present, the consumption of powder metallurgy products for domestic automobiles is only about 5 kg. Consumption upgrading will increase the consumption of powder metallurgy products for single car, and the automobile industry will be one of the important sources of growth of China's MIM products in the future.

At present, the application of the MIM process in the automotive industry mainly includes some complex shaped, bimetallic parts and groups of micro parts, such as turbocharger parts, adjusting rings, fuel injection nozzle parts, blades, gear lever, gearbox, car locks, sensors, airbags, seat belt regulators, ignition switches, reverse gears, convertible roof components, power steering components, etc.

Compared with the precision casting process, the MIM process has the advantages of good surface roughness, high tensile strength, parts combination, reducing the number of parts, reducing costs, and improving benefits.

In addition to the above parts, the ignition key, engine rocker arm parts, U-clamp of steering device, reverse synchronizer, valve lifter, piston ring, combustion chamber cover, car retainer, etc. on the car are all manufactured by MIM process.

As an advanced technology in the field of powder metallurgy, MIM technology is gradually replacing the traditional machining technology and is more used in the production of automobile parts, mainly including power transmission parts, turbocharger, fuel injector, airbag sensor insert, pressure sensor, electric door lock assembly parts and other MIM parts.