Gas deep carburizing method for stainless steel
A stainless steel and carburizing technology, applied in the field of deep gas carburizing of stainless steel, can solve the problems of easy cracking, high austenitization temperature, high stress, etc., to avoid cracks, low carburizing temperature, and reduce thermal stress. Effect
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[0055] Example 2 of the present invention. The stainless steel gas deep carburizing method includes the following steps,
[0056] a. Use 1Cr17Ni2 stainless steel to make parts, clean the parts, and then remove the passivation film on the surface of the parts;
[0057] b. Raise the temperature of the pit carburizing furnace to 880℃, add carburizing agent toluene and catalyst ammonia gas, the supply of toluene is 30-40 drops / min, the supply of ammonia is 5-6.5 liters / min, and the supply time is 0.5 -1.5 hours;
[0058] c. Put the parts into the pit carburizing furnace, only ammonia gas, the ammonia gas supply amount is 7.5-8.5 liters / min, when the carburizing furnace temperature reaches 880 ℃, carburizing:
[0059] The first stage: the furnace temperature is 880℃, the heat preservation is 0.5-1 hour, and the ammonia supply is 5-6.5 liters / min;
[0060] The second stage: furnace temperature 880℃, heat preservation for 0.5-1 hour, ammonia supply rate 5-6.5 liters / minute, toluene supply ra...
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