Method for accelerating plasma nitriding with assistance of rare earth compound
A technology of rare earth compounds and plasma, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of nitride layer grain growth, reduce production efficiency, increase energy consumption, etc., and achieve hardness Improve and reduce nitriding cost and energy consumption, and improve the effect of bearing capacity
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[0023] Example 1
[0024] Step 1: Wash 38CrMoal steel samples with sandpaper and further polish to the mirror state, washed clean in acetone or alcohol solution;
[0025] Step 2: Weigh LA (NO 3 ) 3 · 6h 2 O (99.99%, 0.02mol), Fe (NO 3 ) 3 · 9h 2 O (98.5%, 0.02 mol) causes the molar ratio of the lanthanum ion and iron ions to 1: 1, and the main salt is dissolved in 50 ml of distilled water, and excess of citric acid (10g) is added and stirred for two hours to make iron ions and lanthanum. The ion is fully complexed, and the transparent rare earth compound is formed after 48 h. Lafeo 3 Precursor solution;
[0026] Step 3: The rare earth compound film is prepared by the suspension method (4000 r / min) of the suspension method (the thickness of less than 5 μm) is prepared on the surface of the sample of step 1;
[0027] Step 4: Put the sample into the furnace, pass into nitrogen and hydrogen, and the samples of the three-plating film are plasma nitrogen nitrogen, and the nitrogen nit...
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[0029] Example 2
[0030] Step 1: Wash 38CrMoal steel samples with sandpaper and further polish to the mirror state, washed clean in acetone or alcohol solution;
[0031] Step 2: Weigh LA (NO 3 ) 3 · 6h 2 O (99.99%, 0.02mol), Fe (NO 3 ) 3 · 9h 2 O (98.5%, 0.02 mol) causes the molar ratio of the lanthanum ion and iron ions to 1: 1, and the main salt is dissolved in 50 ml of distilled water, and excess of citric acid (10g) is added and stirred for two hours to make iron ions and lanthanum. The ion is fully complexed, and the transparent rare earth compound is formed after 48 h. Lafeo 3 Precursor solution;
[0032] Step 3: The rare earth compound film (less than 5 μm having a thickness is less than 5 μm) is prepared using a suspension method (suspension machine 6000R / min).
[0033] Step 4: Put the sample into the furnace, pass into nitrogen and hydrogen, and the samples of the three-plating film are plasma nitrogen nitrogen, and the nitrogen nitrogen nitrogen nitrogen is 520 ° C, a...
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[0034] Example 3
[0035] Step 1: Wash 38CrMoal steel samples with sandpaper and further polish to the mirror state, washed clean in acetone or alcohol solution;
[0036] Step 2: Weigh CE (NO 3 ) 3 · 6h 2 O (99.99%, 0.02mol), Fe (NO 3 ) 3 · 9h 2 O (98.5%, 0.02 mol) makes the molar ratio of the lanthanum ion and iron ions from 1: 1, and the main salt is dissolved in 50 ml of distilled water, and excess of citric acid (10g) is added and stirred for two hours to make iron ions and The ions are fully complexed, and they form a transparent rare earth compound Cefeo after standing for 48h. 3 Precursor solution;
[0037] Step 3: The rare earth compound film (thickness is less than 5 μm) is prepared by the suspension method on the sample surface of step 1;
[0038] Step 4: Put the sample into the furnace, pass into nitrogen and hydrogen, and the samples of the three-plating film are plasma nitrogen nitrogen, and the nitrogen nitrogen nitrogen nitrogen is 520 ° C, and the nitriding time is...
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