Chemical nitridation catalyst
A technology of infiltration catalyst and chemical infiltration, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of workpiece rust, short duration of infiltration effect, etc., to save electricity, heat preservation, etc. Shortened time and good nitriding effect
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[0012] Example 1,
[0013] Take 5% calcium carbonate, 25% sodium carbonate, 3% calcium oxide, 17% calcium chloride, 30% ammonium chloride, 5% rare earth carbonate, 15% rare earth chloride in proportion, and mix the above seven compounds uniformly , Put it into a section of stainless steel tube, plug both ends with aluminum silicate fiber felt, and then spot weld both ends on the stainless steel tube with stainless steel discs, and divide them into 200g and 300g packages. Load the workpiece and tooling into the bottom of the 100kw nitriding furnace. After holding at 560-580°C for 12 hours, compare the depth of the infiltration layer and the structure and hardness of the infiltration layer between the test block and no accelerator. As a result, the depth of the permeation layer with the addition of permeation agent is obviously deeper than that without the permeation agent, which is equivalent to the depth of the permeation layer without adding permeation agent for 30 hours.
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[0014] Example 2,
[0015] Take 10% calcium carbonate, 15% sodium carbonate, 5% calcium oxide, 15% calcium chloride, 35% ammonium chloride, 10% rare earth carbonate, 10% rare earth chloride in proportion, and mix the above seven compounds uniformly , Put it into a section of stainless steel tube, plug both ends with aluminum silicate fiber felt, and then spot weld both ends on the stainless steel tube with stainless steel discs, and divide them into 200g and 300g packages. The workpiece and tooling are also loaded into the bottom of the 100kw nitriding furnace, and after holding at 560-580°C for 12 hours, the depth of the infiltration layer and the structure and hardness of the infiltration layer are compared with the test block without the infiltration agent. As a result, the depth of the permeation layer with the addition of permeation agent is also significantly deeper than that without the permeation agent, which is equivalent to the depth of the permeation layer without addi...
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