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Heat treatment process of high chrome cast iron
2024-05-21
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BackThe heat treatment process of high chromium cast iron is heated to 950~1100℃, quenched by holding air cooling and then tempered at a low temperature of 200~260℃. High-temperature agglomeration spheroidization treatment 1140 ~ 1180 ℃ insulation 16h air cooling, can significantly improve the impact toughness and wear resistance. High-temperature ballooning treatment can make carbide all ballooning, can eliminate or reduce the bulk and continuous mesh carbide on the matrix of the segregation effect of the ballooning carbide by a more uniform matrix support, especially by a certain amount of austenite support. Results can also be achieved on thin section parts if the holding time is properly reduced. The disadvantage of this process is the high thermal energy consumption of the process. What will be the effect of heating to 1050°C and tempering at 550°C after holding air quenching? It is important to control the rate of heating, and it is best to hold for a certain amount of time at 650, 750, and 850. Ive done it before, normalizing is fine. The hardness can do 61~65HRC.
Mature process is: soft annealing after casting, easy to process, after processing air-cooled quenching plus low-temperature stress relief tempering. The use of hardness is generally required for HRC58-62, mostly used in such as slurry pump parts and other wear-resistant wear parts.
