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Surface treatment method of aluminum alloy piston and precision friction pair

A technology of surface treatment and friction pairs, applied in nanotechnology for materials and surface science, metal material coating technology, nanotechnology, etc., can solve problems such as increased friction coefficient, loose and rough surface layer structure

Active Publication Date: 2015-11-18
邓才松 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, it solves the problem that the surface layer structure of the ceramic film layer obtained after micro-arc oxidation at home and abroad is loose, rough, low in hardness, and the friction factor increases; Workpieces can only be installed and practical, resulting in a substantial increase in production costs, a fatal problem that is difficult for market users to accept

Method used

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  • Surface treatment method of aluminum alloy piston and precision friction pair
  • Surface treatment method of aluminum alloy piston and precision friction pair
  • Surface treatment method of aluminum alloy piston and precision friction pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Clean and dry the ZTBZA45YC aluminum-based wear-resistant alloy precision worm gear. Put it into the multi-component composite oxidation solution, and the oxidation solution submerges the tooth surface. The multi-component composite oxidation solution contains: sodium silicate 11.3g / L, potassium hydroxide 1.3g / L, zirconium dioxide 0.3g / L, EDTA disodium salt 1.2g / L, adjust pH=11-13 with NOH .

[0068] The power of the equipment is 100Kw, and the power limit surface area is 25dm 2 / time, adjust the positive pulse width and negative pulse width to 0.5-1.5 range for compound changes, adjust the pulse frequency to 37.5-75Hz for compound changes, adjust the positive voltage to 180-320V for compound changes, and adjust the negative voltage to 10-30V range Compound change, the current density is controlled at 2-6A / dm 2 , oxidized for 20 minutes.

[0069] Then, adjust the positive pulse width and negative pulse width to 2-3 intervals for compound changes, adjust the pulse f...

Embodiment 2

[0073] Clean the ZTBZA31YB aluminum-based wear-resistant alloy nuts and shaft sleeves, and dry them at a constant temperature of 80°C for 30 minutes. Put it into the multi-component composite oxidation solution, and the oxidation solution submerges the aluminum alloy nut and shaft sleeve. The multi-component composite oxidation solution contains: sodium silicate 10g / L, potassium hydroxide 0.8g / L, sodium hydroxide 0.6g / L, zirconium dioxide 0.2g / L, EDTA disodium salt 1.3g / L, with NOH adjusts pH=11-13.

[0074] The power of the equipment is 100Kw, and the power limits the surface treatment area to 25dm 2 / time, adjust the positive pulse width and negative pulse width to 0.5-1.5 range compound change, pulse frequency to 37.5-75Hz compound change, positive voltage to 180-380V range compound change, negative voltage to 10-30V range Compound change, the current density is controlled at 3-5A / dm 2 , oxidized for 30 minutes.

[0075] Then, adjust the positive pulse width and negati...

Embodiment 3

[0079] Clean the top of the aluminum alloy piston, the first ring groove and the ring bank used in the ZS156FMI engine, and dry them at a constant temperature of 80°C for 20 minutes. Put it into the multi-component composite oxidation solution, and the oxidation solution submerges the treated surface of the piston. The multi-component composite oxidation solution contains: sodium silicate 14g / L, sodium hydroxide 1.3g / L, zirconium dioxide 0.25g / L, EDTA disodium salt 1.0g / L, and NOH is used to adjust the pH=11-13.

[0080] The power of the equipment is 100Kw, and the power limit surface area is 25dm 2 / time, adjust the positive pulse width and negative pulse width to 0.5-1.5 range for compound changes, adjust the pulse frequency to 37.5-75Hz for compound changes, adjust the positive voltage to 180-320V for compound changes, and adjust the negative voltage to 10-30V range Compound change, the current density is controlled at 2~5A / dm 2 , oxidized for 10 minutes.

[0081] Then,...

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Abstract

The invention relates to a method of processing the surfaces of light alloy, in particular to a method of processing the surfaces of aluminium alloy pistons and precision friction pairs. The method comprises the steps that (1) washing is performed; (2) oxidization is performed; (3) hole plugging is performed. Nanoscale metal matrix ceramic oxidation film layers with the density up to the standard are respectively grown on the aluminium alloy pistons and precision friction pairs processed in the method, the density is increased, the diameters of blind holes are decreased obviously, nanometer penetrant blind holes are sealed, roughness is reduced, the friction coefficient is reduced, and the geometric dimensions are unchanged basically. The aluminium alloy pistons and precision friction pairs processed in the method can be installed for use in a matched mode without finish machining, industrial mass production can be achieved, and the method reduces production cost greatly compared with original technical methods.

Description

technical field [0001] The invention relates to a treatment method for the surface of a light alloy, in particular to a treatment method for the surface of an aluminum alloy piston and a precision friction pair. Background technique [0002] Aluminum alloy has high specific strength and high specific rigidity, and is rich in aluminum resources, so it has become the second largest engineering material after steel. Due to its excellent mechanical and physical properties, alloys based on aluminum elements have been widely used in the fields of aerospace, machinery, electronics, automobiles and other structural parts. With the development of modern technology, the structure is lightened to improve performance, and the characteristics of aluminum alloy are used widely in the field of engines. The friction pair consisting of the piston (not including the piston ring), the cylinder block and the cylinder (sleeve) in the crank-connecting rod mechanism is basically made of aluminum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/66C23C22/83B82Y30/00
Inventor 邓才松邓鸿月
Owner 邓才松
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