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Cr12 die steel rapid pre cooling spheroidizing annealing process

Editor：    Date：2014-06-27 17:56:35    Views：7127

1, using fast precooling isothermal spheroidizing process, through the rapid pre cooling increase the supercooling degree, can improve the speed of the ball, the annealing time is shortened to the traditional process of 1/7~1/10.
2, heating to 860 ℃ ~940 ℃, 730 ℃ isothermal 1.0~1.5h, can get fine particles, carbide distribution, hardness nodular structure appropriate to heated to 940 ℃, the best effect.
3, the heating temperature is too high or the holding time is too long, causing most of carbide dissolution, precipitation is unfavorable for the granular carbides.

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