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Heat Treat H13 Die
#1
How many Bar vacuum quench is necessary for a good heat treat for an H13 die?
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#2
Quench rate is the issue, not the rate of gas flow. Best to talk to your heat treater, he knows what his equipment will do. Some 6 bar furnaces, because of gas flow and other issues can cool faster than some 10 bars. Important rule of thumb is a minimum cooling rate of 5 degrees C per minute. At the high end, 1885F down to 1000F, ( where the rate will easily be faster) you need the quench rate to avoid pearlite and carbides at grain boundries. This account for 20% of the final toughness. At the lower end(1000F to 200F) you need this quench rate to avoid bainite. This accounts for 80% of the final toughness.
Tom Schade
International Mold Steel
6796 Powerline Dr.
Florence, KY 41042
Toll Free: 800.625.6653
Tel: 859.342.6000
Fax: 859.342.6006
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