Sliding element with exposed functional surface

FIELD: engines and pumps.

SUBSTANCE: set of inventions relates to ICE sliding parts. Proposed part comprises substrate with coating thermally deposited thereon and exposed contact surface including at least two different-strength two-phase-material coating. Note here that at least one of coating phases of lower strength is recessed relative to the other coating phase. Making of the part includes preparation of substrate, thermal deposition of coating with exposed contact surface to recess at least one of material phases relative to the other phase. Note also that lower-strength coating material is recessed.

EFFECT: optimum tribological properties.

20 cl, 1 dwg, 1 ex

 

The technical FIELD

The invention relates to a sliding element, in particular for an internal combustion engine, applied thermal spray coating that has an open functional surface.

PRIOR art

Currently, in the field of crank mechanism to its components to meet high requirements in terms of wear resistance, thermal conductivity, strength and mass. Therefore, more and more components are made of light metals. On contact surfaces is mixed until dry friction, which can lead to high frictional losses and excessive wear (such as Microware due to the transfer of metal from aluminum surfaces interacting elements contact pair).

The focus of the development of structures advanced composite structures. For this purpose the outstanding potential of thermal spraying. This way we can cost-effective way to create functional surfaces that meet these requirements and, in addition, improve the tribological properties of parts, consisting in contact with each other.

To date in technology have been known for some obtained by spraying the functional surface of the obtained full-coated cylinder liners obtained by thermal spraying of the inner coating and obtained by thermal spraying strengthening grooves for piston rings. Thus find use so-called pseudoplane. They represent the structure of materials deposition, which consist of two or more different phases of materials in order to combine the advantages of the separate materials. Typically, single phase material is a light metal such as an alloy based on aluminum, and an additional phase in most cases is, high-strength phase, such as silicon carbide.

It is known creating interconnected systems, for example, on the working surfaces of the cylinders by honing (roughening). The formation of intersecting grooves that are in the intersection are connected to each other and thereby form an open system. However, the drawback is that the sliding surface of the sliding element, for example, piston ring piston internal combustion engine, - shifts before him in the grooves of the oil instead to create a hydrodynamic oil pressure. As a result, the edges of the grooves is mixed friction between the cooperating slide elements.

The INVENTION

The objective of the invention is the creation of materials for the contact surfaces and himself the x contact surfaces, optimal tribological properties with relevant physical properties.

According to the first aspect of the invention, the set of the sliding element, including:

the basis and

the coating on the base by means of thermal spraying, and

the coating contains at least two phases; and

at least one of the at least two phases deepened relative to the other phase.

According to the embodiment, the sliding element is a piston ring, bearing, cylinder liner or piston.

According to the exemplary embodiment, at least two phases have different strength, while the in-depth phase has the lowest strength.

To achieve the main goal is to change caused by thermal spraying the surface of the slide so that the phase of light metal was strengthened by the adoption of relatively wear-resistant phase, thereby increasing the durability. Moreover, as a consequence of the deepening of an additional system of micro-cavities in the pressure, due to what at work can increase the share of hydrodynamic friction.

The use of a layer of thermal spraying, through which additional process partially dredged and the way tampered with or opened for vneshnej the impact creates a new design details. The constructive part is made, for example, in the form of a sliding element, such as a piston ring, cylinder liner, bearing, or strengthening the grooves for the piston rings.

According to the example implementation

an in - depth phase contains an alloy-based metal; and

- the element that occurs most often in-depth phase, has a sequence number less than 14 in the periodic system of elements.

According to the embodiment, the opening deep phase carried out by mechanical or chemical means.

According to the embodiment, the depth of the opening defined at a reduced depth Rvkdredging depth phase is from 0.5 to 6 microns.

According to the embodiment, the sliding element is a piston ring, which is made of cast material or of steel.

According to the embodiment, the sliding element is a piston, which is made of an alloy based on aluminum or magnesium.

According to the embodiment, the piston is made of cast or wrought.

According to the example implementation

the piston has at least one groove for the piston ring; and

at least one groove for a piston ring provided with a coating.

According to the example implementation

the piston has the, at least two grooves for piston rings; and

- jumper between at least two grooves for piston rings provided with a coating.

According to the second aspect of the invention provides a method of manufacturing the sliding element, including:

- preparation of foundations;

- drawing on the basis of the coating by thermal spraying, and the coating contains at least two phases; and

- recess, at least one of the at least two phases relative to another or other phases.

According to the embodiment, the sliding element is a piston ring, bearing, cylinder liner or piston.

According to the exemplary embodiment, at least two phases have different strength, while the in-depth phase has the lowest strength.

According to the example implementation

an in - depth phase consists of an alloy-based metal; and

- the element that occurs most often in-depth phase, has a sequence number less than 14 in the periodic system of elements.

According to the embodiment, the opening deep phase carried out by mechanical or chemical means.

According to the embodiment, the depth of the opening defined at a reduced depth Rvkdredging depth phase is from 0.5 to 6 microns.

According to the example osuwestvlenieaj.in slip is a piston ring made of die-cast material or of steel.

According to the embodiment, the sliding element is a piston and made of an alloy based on aluminum or magnesium.

According to the embodiment, the piston is made of cast or wrought.

According to the example implementation

- in the piston is provided at least one groove for the piston ring; and

at least one groove for a piston ring provided with a coating.

According to the example implementation

- in the piston is provided, at least two grooves for piston rings; and

- jumper between at least two grooves for piston rings provided with a coating.

A BRIEF DESCRIPTION of GRAPHIC MATERIALS

Hereinafter the invention will be described in the examples with reference to the accompanying image.

The drawing shows opened coating obtained by thermal spraying in accordance with an example embodiment of the invention.

INFORMATION CONFIRMING the POSSIBILITY of carrying out the INVENTION

The drawing shows a photograph caused by thermal spraying layer for element slip after opening the matrix based on aluminum. Here the aluminum matrix is enhanced relative to iron matrix. The depth of the opening defined at a reduced depth Rvkexcavation is 5 microns.

1. Item motor slip inside nego combustion, contains the basis and deposited by thermal spray coating with open contact surface comprising at least two phases of the coating material with different strength, and one of at least two phases of the coating material with the lowest strength, enhanced relative to another or other phases of the coating.

2. Item according to claim 1, characterized in that it is a piston ring or piston.

3. Item according to claim 1, characterized in that the in-depth phase contains an alloy-based metal, and the element that occurs most often in-depth phase, has a sequence number less than 14 in the periodic system of elements.

4. Part one of claims 1 to 3, characterized in that the lancing depth phase carried out by mechanical or chemical means.

5. Part one of claims 1 to 3, characterized in that the depth of the opening defined at a reduced depth Rvkdredging depth phase is from 0.5 to 6 microns.

6. Part one of claims 1 to 3, characterized in that it is made of cast material or of steel.

7. Part one of claims 1 to 3, characterized in that it is made from an alloy based on aluminum or magnesium.

8. Item according to claim 7, characterized in that it is made of cast or wrought.

9. Item according to claim 7, characterized in that it is a piston having at least one groove for the piston ring, with at least one groove for a piston ring provided with a coating.

10. Item according to claim 9, characterized in that the piston has at least two grooves for the piston rings, and the jumper between at least two grooves for piston rings provided with a coating.

11. Method of manufacturing parts sliding of the internal combustion engine, including:
- preparation of foundations;
- application basis by thermal spraying coating with open contact surface comprising at least two phases of the coating material with different strength, deepening one of the at least two phases of the coating material relative to another or other phases of the coating material, while providing the deepening phase of the coating material with the lowest strength.

12. The method according to claim 11, characterized in that detail slip of the internal combustion engine is a piston ring or piston.

13. The method according to claim 11, characterized in that the in-depth phase consists of an alloy-based metal, and the element that occurs most often in-depth phase, has a sequence number less than 14 in the periodic system of elements.

14. The method according to one of 11 to 13, characterized in that the lancing depth phase is carried out by milling the definition or chemical means.

15. The method according to one of 11 to 13, characterized in that the depth of the opening defined at a reduced depth Rvkdredging depth phase is from 0.5 to 6 microns.

16. The method according to one of 11 to 13, characterized in that detail slip of the internal combustion engine made of cast material or of steel.

17. The method according to one of 11 to 13, characterized in that detail slip of the internal combustion engine is made of an alloy based on aluminum or magnesium.

18. The method according to 17, characterized in that detail slip of the internal combustion engine is made of cast or wrought.

19. The method according to 17, characterized in that detail slip of the internal combustion engine is a piston having at least one groove for the piston ring, with at least one groove for a piston ring provided with a coating.

20. The method according to claim 19, characterized in that the piston has at least two grooves for the piston rings, and the jumper between at least two grooves for piston rings provided with a coating.



 

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