Treatment technology for inner cavity surface of cylinder cover

Abstract

The invention discloses a treatment technology for an inner cavity surface of a cylinder cover. The treatment technology comprises processes as follows: cleaning the inner cavity surface of the cylinder cover to remove oil and dust; preheating the inner cavity surface of the cylinder cover to 70-90 DEG C in a far-infrared heating manner; performing spraying: spraying paint onto the inner cavity surface of the cylinder cover, wherein the thickness of the coating is in a range of 60-90 mu m; performing drying: continuously keeping the temperature of the inner cavity surface of the cylinder cover in a range of 70-90 DEG C and continuously drying the coating for 5-10 min in the far-infrared heating manner; performing sintering: performing high-temperature sintering on the coating of the inner cavity surface of the cylinder cover in a laser scanning heating manner at the temperature of 190-200 DEG C for 20-25 min to form a corrosion-resistant high-temperature-resistant ceramic film layer on an inner cavity of the cylinder cover. The treatment technology has the advantages that the coating is high-temperature-resistant and corrosion-resistant and has a catalytic combustion effect, so that the combustion efficiency of an engine is improved.

Description

technical field

[0001] The invention relates to the field of metal surface treatment, in particular to an inner cavity surface treatment process of a cylinder head. Background technique

[0002] Cylinder head is one of the important large parts of automobile engine, and occupies an important position in the design and manufacture of the engine. Its complex internal structure and severe operating conditions make its reliability a technical difficulty in engine design.

[0003] Existing cylinder heads are generally made of cast iron or aluminum. Because the quality of the current oil products is difficult to unify, some unqualified oil products will be mixed with corrosive impurities such as urea. When these components are burned in the engine, they will cause corrosion to the inner cavity surface of the cylinder head, and the corrosion of these surfaces will The carbon particles produced by the incomplete combustion of gasoline and diesel oil are more likely to accumulate on...

Examples

Embodiment 1

[0026] (1) Clean the surface of the inner cavity of the cylinder head, remove oil and dust;

[0027] (2) Preheat the surface of the inner cavity of the cylinder head to 70-90°C by means of far-infrared heating; preferably 80°C;

[0028] (3) Spraying, spraying the spraying paint on the surface of the inner cavity of the cylinder head, the thickness of the spraying layer is 60-90 μm, preferably 80 μm, and the components of the spraying paint are, in parts by mass:

[0029] Silicone modified acrylic resin 35-65%

[0030] Octyl phosphate acyloxy titanate 1.5-3%

[0031] Nano calcium carbonate 0.5 -5%

[0032] Diamond powder 0.3 -10.3%

[0033] Cyclohexanone 10-13%

[0034] Pyrophyllite powder 2.5-5.5%

[0035] Yttrium phosphide 0.5-10%

[0036] Zircon powder 0.03-0.15%

[0037] Titanium oxide powder 5.2-25.0%;

[0038] (4) Drying, using far-infrared heating, continue to keep the temperature of the inner cavity surface of the cylinder head at 70-90°C, preferably 80°C, and c...

technical field

[0001] The invention relates to the field of metal surface treatment, in particular to an inner cavity surface treatment process of a cylinder head. Background technique

[0002] Cylinder head is one of the important large parts of automobile engine, and occupies an important position in the design and manufacture of the engine. Its complex internal structure and severe operating conditions make its reliability a technical difficulty in engine design.

[0003] Existing cylinder heads are generally made of cast iron or aluminum. Because the quality of the current oil products is difficult to unify, some unqualified oil products will be mixed with corrosive impurities such as urea. When these components are burned in the engine, they will cause corrosion to the inner cavity surface of the cylinder head, and the corrosion of these surfaces will The carbon particles produced by the incomplete combustion of gasoline and diesel oil are more likely to accumulate on...

Examples

Embodiment 1

[0026] (1) Clean the surface of the inner cavity of the cylinder head, remove oil and dust;

[0027] (2) Preheat the surface of the inner cavity of the cylinder head to 70-90°C by means of far-infrared heating; preferably 80°C;

[0028] (3) Spraying, spraying the spraying paint on the surface of the inner cavity of the cylinder head, the thickness of the spraying layer is 60-90 μm, preferably 80 μm, and the components of the spraying paint are, in parts by mass:

[0029] Silicone modified acrylic resin 35-65%

[0030] Octyl phosphate acyloxy titanate 1.5-3%

[0031] Nano calcium carbonate 0.5 -5%

[0032] Diamond powder 0.3 -10.3%

[0033] Cyclohexanone 10-13%

[0034] Pyrophyllite powder 2.5-5.5%

[0035] Yttrium phosphide 0.5-10%

[0036] Zircon powder 0.03-0.15%

[0037] Titanium oxide powder 5.2-25.0%;

[0038] (4) Drying, using far-infrared heating, continue to keep the temperature of the inner cavity surface of the cylinder head at 70-90°C, preferably 80°C, and c...