Spheroidal graphite cast iron ADI
January 03, 2018 04:10AM
Austempering heat treatment is American materials scientist E. Bain in 1930s to C. steel of isothermal transformation and development, 40s professor Flinn applied to the gray cast iron, in 1952 the United States InternationalHarvester company a lot of ductile cast iron heat treatment test, including austempering heat treatment, the ductile iron high high strength, toughness and wear resistance. This research has begun to attract attention, but it has not been formally applied. A systematic study of Austempering heat treatment of nodular cast iron and its application to gear began in the late 1960s. At the end of the 70s, Finland, the United States and China were independent of each other, and almost simultaneously announced the successful study of nodular cast iron ADI.performance insulation cup vacuum brazing furnace
The United States developed a high hardness spheroidal graphite cast iron ADI. In 1971, General Motors Corporation started the research on the application of ADI on the rear axle spiral bevel gear, announced the success in 1976, and replaced the forged steel gear with ADI on the rear axle of Pontiacs car, and built the annual production line of 1 million 100 thousand sets of ADI gears. Finland has developed a high resilience ADI. In 1974, KymiKymmene successfully researched a kind of isothermal quenching ductile iron called "KYMENITE". Well type copper wire vacuum atmosphere industrial electric annealing furnace price
It applied for patent in 13 countries to manufacture gear and other high stress parts. In 1978, it began to produce high toughness rear axle gear and ball mill gear and so on. So far, millions of sets have been produced. China has developed a high - and medium - hardness ADI.High temperature vacuum sintering tube furnace with gas protection
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