Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring
A processing method and technology of superhard particles, which can be used in piston rings, engine components, machines/engines, etc., and can solve problems such as easy falling off of coatings
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Embodiment 1
[0025] The following takes the production of piston rings for Yunnei 4102QBZL diesel engine as an example to illustrate the main production process:
[0026] 1. Prepare 3m of plating solution according to the above ratio 3 :
[0027] CrO3 150 g / L, analytically pure sulfuric acid 1.5 g / L, potassium fluorosilicate 9 g / L, the rest is deionized water, the bath temperature is controlled at: 60±2°C
[0028] 2. Put the piston ring into the plating solution, and turn on the forward current at 75A / Dm 2 Plating at a current density of 10 minutes, the outer surface of the piston ring is covered with a layer of hard chromium, and the thickness of the coating is about 0.01-0.02mm.
[0029] 3. With 50A / Dm 2 The current density on the surface of the piston ring is reverse-engraved for 100 seconds, and the grid crack is about 0.008mm deep and 0.005-0.02mm wide
[0030] 4. Add superhard particles SiC, Al2O3, and diamond with a size of 0.0005-0.005 mm into the plating solution and stir them...
Embodiment 2
[0034] This embodiment is to produce piston rings for Xichai 6DL diesel engine, and its process steps and conditions are the same as in Example 1, except that the liquid proportioning ratio is different:
[0035] CrO3380 g / L, sulfuric acid analytically pure 3.5 g / L, potassium fluorosilicate 19 g / L, the rest is deionized water, and the bath temperature is controlled at: 60±2°C.
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