A method for shortening the gas nitriding process time of alloy structural steel
A technology of alloy structural steel and process time, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of low production efficiency, long nitriding time, etc., and achieve increased driving force and increased surface Nitrogen concentration, the effect of accelerating the spreading speed
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specific Embodiment approach 1
[0019] Specific implementation mode 1: This implementation mode is a method for the nitriding process of alloy structural steel, which is specifically completed according to the following steps:
[0020] 1. Mix the infiltration agent and dry sand evenly to obtain the infiltration agent / sand mixture, and then put the infiltration agent / sand mixture into the iron drum;
[0021] The mass ratio of the quality of the infiltrating agent described in step 1 to the dry sand is 1:(2~3);
[0022] 2. Put the alloy structural steel workpiece and the iron drum containing the infiltration agent / sand mixture in the nitriding tank, seal the furnace cover, and feed ammonia gas until the volume fraction of ammonia gas in the nitriding tank is 90%. Heating evenly until the temperature of the nitriding tank is 530°C-540°C, then keeping the ammonia decomposition rate at 20%-35% and the temperature at 530°C-540°C for 20 hours, then cooling naturally with the furnace until the temperature is lower t...
specific Embodiment approach 2
[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the osmotic agent described in step 1 is granular or powdery. Other steps are the same as in the first embodiment.
specific Embodiment approach 3
[0035] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the penetrating agent described in step 1 is polyvinyl chloride. Other steps are the same as those in Embodiment 1 or 2.
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