Low-temperature QPQ treatment process for 316L stainless steel workpiece
A treatment process, stainless steel technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem of reduced corrosion resistance, achieve the effect of improving wear resistance and avoiding secondary tempering
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Embodiment 1
[0021] A kind of 316L stainless steel workpiece low-temperature QPQ processing technology, it is characterized in that carrying out according to the following flow process:
[0022] Step 1, cleaning: Soak the 316L stainless steel workpiece in the stain-removing oil for 5 minutes. The oil stain on the surface of the workpiece is completely removed as the standard. When the oil stain on the surface of the workpiece is extremely serious, the soaking time can be extended appropriately; A 14kw ultrasonic cleaning machine cleans the workpiece at 65°C for 30 minutes, then takes out the workpiece and rinses it twice with clean water, with a single rinse time of 3 minutes. Try to ensure that there is no residue of decontamination oil on the surface of the workpiece.
[0023] Step 2, preheating: Use compressed air to blow off as much residual water as possible on the surface of the cleaned 316L stainless steel workpiece, then place the workpiece in a preheating furnace at 350°C for 30 mi...
Embodiment 2
[0031] The difference between embodiment 2 and embodiment 1 is:
[0032] Step 1, cleaning: Soak the 316L stainless steel workpiece in stain-removing oil for 2 minutes, then use an ultrasonic cleaning machine with an ultrasonic frequency of 25KHZ and an ultrasonic power of 14kw to clean the workpiece at 70°C for 20 minutes, then take out the workpiece and rinse it twice with clean water. The rinse time is 2 minutes.
[0033] Step 2, preheating: After blowing off as much water as possible on the surface of the cleaned 316L stainless steel workpiece, place the workpiece in a preheating furnace at 380°C for 45 minutes.
[0034] Step 3, Nitriding: Then add the nitride salt for low-temperature QPQ into the nitriding furnace, heat the nitride salt in the nitriding furnace to its molten liquid state, and then put the preheated workpiece into the nitriding furnace , the furnace temperature was maintained at 425 ° C for 600 min for nitriding. In the molten state, the nitride salt is c...
Embodiment 3
[0041] The difference between embodiment 3 and embodiment 1 and embodiment 2 is:
[0042] Step 1, cleaning: Soak the 316L stainless steel workpiece in stain-removing oil for 3 minutes, then use an ultrasonic cleaning machine with an ultrasonic frequency of 25KHZ and an ultrasonic power of 14kw to clean the workpiece at 60°C for 15 minutes, then take out the workpiece and rinse it twice with clean water. The rinse time is 4 minutes.
[0043] Step 2, preheating: After blowing off as much water as possible on the surface of the cleaned 316L stainless steel workpiece, place the workpiece in a preheating furnace at 355°C for 60 minutes.
[0044] Step 3, Nitriding: Then add the nitride salt for low-temperature QPQ into the nitriding furnace, heat the nitride salt in the nitriding furnace to its molten liquid state, and then put the preheated workpiece into the nitriding furnace , the furnace temperature was maintained at 430 ° C for 480 min for nitriding. In the molten state, the ...
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