JP2000234161A - Bearing part, its production and its repairing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide bearing parts having a long service life and high reliability by providing the surface of a bearing base material with an intermediate layer of metal and securing mechanical and chemical adhesion between the white metal and the base material, to provide a method for producing the same and to provide a method for repairing the same. SOLUTION: In bearing parts having a wear resistant coating layer composed of white metal 3 applied to a bearing base material 1 by a thermal spraying method, the layer 2 of a metallic element or an alloy having <=1100 deg.C m.p. is provided as an intermediate layer on the space between the white metal 3 and the bearing base material 1 by depositing metallic grains thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing component in which a bearing surface of a bearing substrate is provided with a wear-resistant coating made of white metal, and a method for manufacturing and repairing the bearing component.

[0002]

2. Description of the Related Art Generally, a white metal is lined on a bearing surface of a bearing base material. The lining of this white metal is usually performed by a casting method. In this casting method, the bearing base material is immersed in an organic solvent bath at about 80 ° C. and sufficiently degreased and washed. Then, after tin plating or solder plating is applied as a base treatment, white metal is poured and poured. Lining is performed by centrifugal casting.

[0003]

In the casting method described above,
Since the lining layer of the white metal becomes thick, machining for thinning after casting is necessary. Further, there is a problem that the composition of the white metal layer is largely segregated, and the adhesion strength of the white metal to the bearing substrate becomes non-uniform.

[0004] When the bearing receives an unbalanced load, the white metal layer suffers extreme wear and damage, and the damaged portion needs to be repaired. However, in the casting method, it is difficult to apply white metal only to a damaged portion, and it is difficult to perform lining. Therefore, the repair by the casting method has a problem that the white metal must be lined over the entire bearing surface after the white metal layer is completely dropped once. Further, this casting method involves a degreasing operation using a large amount of an organic solvent as a pretreatment and a plating operation as a base treatment, and thus has a problem of a working environment.

As a method for solving such a problem, a method of manufacturing a white metal bearing by thermal spraying has been studied. In this method, an excellent bearing can be manufactured by forming a dense layer having a thickness of 1 mm to 30 mm and a porosity of 20% or less, and then performing a heat treatment.

However, if a single white metal layer is formed by thermal spraying directly on the surface of a relatively hard material such as carbon steel or the like as a bearing base material, the metal particles are less likely to bite into the base material, resulting in poor mechanical performance. Lacks good adhesion,
There is a problem that the white metal layer is peeled off.

Further, even if an attempt is made to obtain an adhesion strength by a heat treatment after thermal spraying, at a temperature around the melting point of the white metal of about 200 ° C., diffusion of elements between the white metal and the base material is extremely slow, so that adhesion is obtained. It is difficult to form a good diffusion reaction layer for the purpose.

An object of the present invention is to provide a metal intermediate layer on the surface of a bearing base material to ensure mechanical and chemical adhesion between the white metal and the base material, thereby providing a long life and high reliability. An object of the present invention is to provide a bearing component, a manufacturing method thereof, and a repair method.

[0009]

Means for Solving the Problems In order to solve the above problems and achieve the object, a bearing component of the present invention, a method for manufacturing the same and a method for repairing the same are configured as follows.

(1) A bearing component according to the present invention is a bearing component having a wear-resistant coating layer made of white metal applied to a bearing substrate by thermal spraying, wherein the layer or alloy of a metal element having a melting point of 1100 ° C. or less is used. Was provided as an intermediate layer between the white metal and the bearing substrate by attaching metal particles.

(2) The bearing component of the present invention is the component described in (1) above, wherein the main component of the intermediate layer is any one of aluminum, copper, zinc, antimony, lead, and tin. Become.

(3) The method for manufacturing a bearing component according to the present invention comprises:
In a method for manufacturing a bearing component having a wear-resistant coating layer made of white metal on a bearing substrate, after coating the intermediate layer according to the above (1) or (2) on the bearing surface of the bearing substrate by a thermal spraying method. A coating step of coating a white metal layer by a thermal spraying method, and a diffusion adhesion treatment step of subjecting the coated part to diffusion adhesion heat treatment by heating at a temperature not higher than the melting point of the white metal in a heating furnace. .

(4) The method of manufacturing a bearing part according to the present invention is the method described in (3) above, wherein the coating step is performed by using a high-speed flame spraying method or an ultra-high-speed flame spraying method. From 350 m / sec to 150
Thermal spraying at a speed of 0 m / sec.

(5) The method for manufacturing a bearing component according to the present invention is the method described in (4) above, wherein the particles having a diameter of 10 μm to 200 μm are used.

(6) The method for manufacturing a bearing component according to the present invention is the method according to any one of the above (3) to (5), and uses spherical powder as the thermal spray powder for the white metal and the intermediate layer. .

(7) The method for producing a bearing component according to the present invention is the method according to any one of the above (3) to (6), and the diffusion adhesion heat treatment is performed on a bearing substrate coated with white metal. And heating and holding in a heating furnace at 100 ° C. to 250 ° C., which is lower than the melting point temperature of the white metal, for 30 minutes to 50 hours.

(8) The method for manufacturing a bearing component according to the present invention is the method according to any one of the above (3) to (7), wherein a diffusion layer is provided at an interface between the intermediate layer and the white metal layer. It was formed to a thickness of 2 μm to 200 μm.

(9) The method for manufacturing a bearing component according to the present invention is the method according to any one of the above (3) to (8), wherein the sprayed powder of the intermediate layer has a Brinell hardness of 30 ° C. at room temperature. The above powder was used.

(10) The method of manufacturing a bearing component according to the present invention is the method of manufacturing a bearing component having a wear-resistant coating layer made of white metal on a bearing substrate. The intermediate layer between the bearing substrates was coated to a thickness of 0.01 mm to 10 mm, the white metal layer to a thickness of 1 mm to 30 mm, and the porosity of both layers was reduced to 20% or less by a thermal spraying method.

(11) According to a method of repairing a bearing component of the present invention, a part of the bearing surface is formed by the manufacturing method according to any one of the above (3) to (7) and (9) to (10). Repair formed.

(12) The bearing component of the present invention is manufactured by the manufacturing method according to any one of the above (3) to (10), and is used for a gas turbine, a steam turbine, or a diesel engine.

As a result of taking the above-described measures, the following effects are obtained.

(1) According to the bearing component of the present invention, since the metal intermediate layer is softer than the bearing substrate, white metal particles can easily penetrate, and sufficient mechanical adhesion can be obtained. On the other hand, in general, low-melting metal elements tend to diffuse and react with other elements, and form a reaction layer even in a short-time low-temperature heat treatment. Chemical adhesion between them can be obtained. As an index of the melting point of the metal element, the melting point of Fe, which is mainly used for
Although it is an absolute condition that the temperature is lower than 35 ° C., it is preferably 1100 ° C. or less from the viewpoint that diffusion proceeds easily. As a result, the bearing component exhibits an excellent abrasion resistance effect, and makes it difficult for the white metal layer to peel off.

(2) According to the bearing component of the present invention, aluminum (melting point: 660 ° C.), copper (melting point: 1085 ° C.), zinc (melting point: 42
0 ° C), antimony (melting point 631 ° C), lead (melting point 328)
C) or tin (melting point: 232 ° C.), which is preferable in terms of both physical properties and practicality.

(3) According to the method of manufacturing a bearing component of the present invention, by performing heat treatment after thermal spraying of the intermediate layer and the white metal, element diffusion occurs between the white metal layer and the intermediate layer, and the reaction layer is formed. Formation is induced and good chemical adhesion can be obtained.

(4) According to the method of manufacturing a bearing component of the present invention, by using the high-speed flame spraying method or the ultra-high-speed flame spraying method, the mechanical adhesion between the white metal layer and the intermediate layer, and between the intermediate layer and the base material. It is possible to remarkably improve the performance, and it is possible to improve the reliability of the white metal bearing by the thermal spraying method.

(5) According to the method for manufacturing a bearing component of the present invention, if the particle diameter of the sprayed powder is less than 10 μm, the adhesion efficiency at the time of spraying is extremely reduced, and if it exceeds 200 μm, the speed of the sprayed powder is extremely high. , The adhesion efficiency and the adhesion efficiency also decrease, but in the present invention, the particle diameter is 10 μm
To 200 μm, these problems can be avoided.

(6) According to the method for manufacturing a bearing part of the present invention, when the sprayed powder is not spherical, the inner surface of the spray gun is greatly worn and the life of the gun is significantly shortened. These problems can be avoided because the thermal spray powder is spherical.

(7) According to the method of manufacturing a bearing component of the present invention, if the temperature of the diffusion heat treatment is a temperature just below the melting point of the white metal, the shape in the sprayed state can be maintained as it is. Processing by shape becomes possible, post-processing steps such as machining after heat treatment can be largely omitted, and the economic effect is increased.

(8) According to the method for manufacturing a bearing component of the present invention, when the thickness of the diffusion reaction layer formed between the metal intermediate layer and the white metal layer is less than 0.1 μm, sufficient chemical adhesion is obtained. If it exceeds 200 μm,
Although crack growth of the reaction layer is likely to occur, in the present invention, since it is outside the above range, sufficient adhesion of the white metal layer can be obtained.

(9) According to the method for manufacturing a bearing component of the present invention, if the Brinell hardness of the sprayed powder of the intermediate metal layer is less than 30 ° C., which is equivalent to that of white metal, the sprayed powder bites into the bearing substrate. Is inadequate, and the adhesion of the white metal layer is not preferable because it is about the same as or less than that obtained by directly spraying the white metal on the base material. Avoid problems.

(10) According to the method for manufacturing a bearing component of the present invention, when the thickness of the intermediate metal layer is 0.01 μm or less, a portion having almost no intermediate layer when the surface roughness during thermal spraying is considered. Is formed, and it is considered that it is essentially sufficient if the thickness is more than this. In practice, the thickness is preferably 10 mm or less.
Therefore, these problems can be avoided.

(11) According to the method of repairing a bearing component of the present invention, it has conventionally been necessary to remove the white metal from the entire bearing surface and then re-line the white metal, but only the local repair is performed. This allows the bearing to be reused.

(12) According to the bearing part of the present invention, repairability and reliability of various turbines and engines are improved,
The service life and reliability of the machine can be improved.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, a bearing component is manufactured by the following method.

First, the melting point of the bearing surface of the bearing base material is 1
An intermediate metal layer composed of a metal element layer or an alloy layer having a temperature of 100 ° C. or lower is about 1 mm (or 0.01 mm to 10 m).
m) to perform thermal spraying. The main component of the intermediate metal layer is made of any one of aluminum, copper, zinc, antimony, lead, and tin. Then, the outermost white metal layer is about 10 mm (or 1 mm to 30 mm)
, And densely coated by a thermal spraying method so that the porosity is 20% or less (coating step).

Further, the bearing substrate coated with white metal in the above-mentioned coating step
Diffusion adhesion heat treatment is performed in a heating furnace by heating below the melting point of the white metal (diffusion adhesion treatment step).

Here, particularly in the above-mentioned coating step, the intermediate metal layer is applied to the bearing surface of the bearing substrate by high-speed flame spraying or ultra-high-speed flame spraying so that the particles of the coating material are coated at a speed of 350 m / s to 1500 m / s. Thermal spraying is performed at a high speed to form a porosity of 20% or less.

In the above-mentioned coating step, before the intermediate metal layer is sprayed on the bearing surface of the bearing base material by using the high-speed flame spraying method or the ultra-high-speed flame spraying method, the surface of the bearing sprayed by Ra is 5 μm.
To 50 μm, more preferably 10 μm to 35 μm, or Rmax of 30 μm to 500 μm, more preferably 100 μm to 400 μm.

Further, in the above-mentioned coating step, when spraying at least one of the metal intermediate layer and the white metal on the bearing surface of the bearing base material by using a high-speed flame spraying method or an ultra-high-speed flame spraying method, air or an inert gas is used. And spray coating while cooling the temperature of the bearing base material to 200 ° C. or less by spraying, it becomes possible to form a film having good characteristics.

In the above-mentioned coating process, when spraying a white metal by a high-speed flame spraying method or an ultra-high-speed flame spraying method, the sprayed powder of the white metal has a particle diameter of 10 μm to 200 μm, more preferably 30 μm to 150 μm. A spherical shape with a diameter of
A material having a Brinell hardness of 30 ° C. or more at room temperature is used.

Further, in the above coating step, when white metal is subjected to thermal spraying using a high-speed flame spraying method or an ultra-high-speed flame spraying method, a spherical powder is used as a sprayed powder of the white metal.

Further, in the above-mentioned coating step, when spraying white metal by high-speed flame spraying or ultra-high-speed flame spraying, 0 to 15% by weight of Sb and 0 to 10% by weight as the sprayed powder of white metal. % Is Cu, 0 to 20% by weight is Pb, and 0 to 30% by weight is Z.
n, the rest being Sn-based white metal such as Sn, or 0 to 0
50% by weight of Sn, 0 to 20% by weight of Sb, 0 to 5.0
% By weight of Cu, 0 to 1.5% by weight of As, the balance being a Pb-based white metal such as Pb, 5 to 15% by weight of Sn, 0.
An Al-based white metal such as Cu is used in an amount of 5 to 5.0% by weight, Ni is used in an amount of 2.0% by weight or less, and the balance is Al.

On the other hand, in the diffusion adhesion heat treatment step,
The bearing substrate coated with white metal by the above-mentioned coating step is heated in a heating furnace to 100 to 250 ° C., more preferably 1 to 250 ° C., which is lower than the melting point of white metal.
30 minutes to 50 hours at 70 to 230 ° C, more preferably 5 to 50 hours.
Heat and hold for 30 hours. In this diffusion adhesion heat treatment step, a diffusion layer is formed at the interface between the metal intermediate layer and the white metal layer at 2 μm to 200 μm, more preferably 5 μm to 1 μm.
It is formed to a thickness of 00 μm.

FIGS. 1 and 2 are views illustrating a bearing component manufactured by the above-described manufacturing method. FIG.
FIG. 1 is a schematic view showing an example in which the bearing component is applied to a radial bearing, in which a metal intermediate layer 2 and a white metal coating layer 3 are formed on a cylindrical inner wall surface of a bearing substrate 1. FIG. 2 is a schematic view showing an example in which the bearing component is applied to a thrust bearing, in which a metal intermediate layer 2 and a white metal coating layer 3 are formed on the surface of a bearing substrate 1.

FIG. 3 is a diagram schematically showing a cross-sectional structure of the bearing component after the diffusion adhesion heat treatment. As shown in FIG. 3, the metal intermediate layer 2 formed on the surface of the bearing substrate 1
A diffusion reaction layer 4 is formed between the metal layer and the white metal coating layer 3.

[0047]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of a bearing component and a method of manufacturing the same according to the above embodiment will be described below.

(Example 1) 300 m in length as a bearing base material
m, 500 mm wide, 250 mm thick carbon steel (SS4
1) A semi-cylindrical bearing part having a diameter of 320 mm and a length of 300 mm was provided. The bearing surface was treated as a pretreatment for thermal spraying by a blasting machine using alumina grit (# 15) at a blast pressure of 4 kg / cm ² and a surface roughness of Rmax 250 μm.
m. After that, super high-speed flame spraying (HP / HV
OF) method, (1) copper powder (particle diameter 30 to 100 μm)
m), (2) aluminum (particle diameter 30 to 100 μm)
m) and (3) Tin (particle diameter: 30 to 100 μm) was sprayed at a speed of 1200 m / sec.

Thereafter, using a sprayed powder of white metal (9.0% by weight of Sb, 5.5% by weight of Cu, and the balance of Sn) (spherical powder having a particle diameter of 30 to 100 μm),
Thermal spraying was performed at a very high speed of 200 m / sec, and the coating was performed to a thickness of 10 mm.

Next, these coated bearing substrates were heated in a heating furnace at 200 ° C. for 36 hours to carry out diffusion adhesion heat treatment. After this heat treatment, the thickness of the diffusion layer at the interface between the metal intermediate layer and the coating layer was about 10 μm in each of the bearings. Thereafter, the surface of the coated white metal layer was machined to Ra0.2.
Finish processing was performed to a roughness of 5 μm or less.

The intermediate metal layer thus obtained has a different
Bearing sliding test for three types of bearing parts
did. For comparison, a bearing part without an intermediate layer
An article was also made at the same time and subjected to a similar test. In addition, bearing
The sliding test was a 300mm diameter cylindrical shape made of 12Cr steel.
Of the bearing surface is 200kg / cm ²
Rotate the shaft at 3,000 rpm for 1 hour
Was.

As a result of the bearing sliding test, in the three types of bearings according to the present invention, no damage or the like was observed on the 12Cr steel shaft, and no seizure occurred. In addition, the bearing coated white metal layer is free from scratches and extreme wear damage, which are problematic, and has good sliding properties.The white metal layer is hardly worn and has abrasion resistance. It was good. On the other hand, in the parts without the intermediate layer, the white metal layer was peeled off about 15 minutes after the start of the test, causing significant wear and seizure.

(Example 2) 300 m in length as a bearing base material
m, 500 mm wide, 250 mm thick carbon steel (SS4
1) A semi-cylindrical bearing part having a diameter of 320 mm and a length of 300 mm was provided. The bearing surface was treated as a pretreatment for thermal spraying by a blasting machine using alumina grit (# 15) at a blast pressure of 4 kg / cm ² and a surface roughness of Rmax 250 μm.
m. After that, super high-speed flame spraying (HP / HV
By the OF method, thermal spraying was performed at a speed of 1200 m / sec using copper powder (particle diameter: 30 to 100 μm).

Thereafter, using a sprayed powder of white metal (9.0% by weight of Sb, 5.5% by weight of Cu, and the balance of Sn) (spherical powder having a particle diameter of 30 to 100 μm), 1
Thermal spraying was performed at a very high speed of 200 m / sec, and the coating was performed to a thickness of 10 mm.

Next, in one bearing, 2
Diffusion adhesion heat treatment was performed by heating and holding at 00 ° C. for 36 hours, and in another bearing, this diffusion adhesion heat treatment was omitted. In the bearing subjected to the diffusion heat treatment, the thickness of the diffusion reaction layer at the interface between the metal intermediate layer and the coating layer was about 10 μm. Thereafter, the surfaces of the white metal layers of these bearings were finished by machining to a roughness of Ra 0.25 μm or less.

A bearing sliding test was carried out on the two types of bearing parts obtained by using the different heat treatment methods. The bearing sliding test was performed on a 3Cr steel
A cylindrical rod having a diameter of 00 mm is used for the shaft, the bearing surface pressure is 200 kg / cm ² , and the rotation of the shaft is 3,000 rpm.
m for 5 hours.

As a result of the bearing sliding test, no scratches or the like were observed on the shaft of the 12Cr steel, and no seizure occurred in the bearing subjected to the heat treatment. In addition, the bearing coated white metal layer is free from scratches and extreme wear damage, which are problematic, and has good sliding properties.The white metal layer is hardly worn and has abrasion resistance. It was good. On the other hand, in the case of the bearing that was not subjected to the heat treatment, peeling occurred between the white metal layer and the metal intermediate layer in about 2 hours of the test, and seizure occurred.

(Example 3) As a bearing base material, length of 300 m
m, 500 mm wide, 250 mm thick carbon steel (SS4
1) A semi-cylindrical bearing part having a diameter of 320 mm and a length of 300 mm was provided. The bearing surface was treated as a pretreatment for thermal spraying by a blasting machine using alumina grit (# 15) at a blast pressure of 4 kg / cm ² and a surface roughness of Rmax 250 μm.
m. After that, super high-speed flame spraying (HP / HV
OF) method, using (1) spherical copper powder (particle diameter 30 to 100 μm) by gas atomization method and (2) horned copper powder by pulverization method, using different types of bearings at different speeds of 1200 m / sec. Thermal spraying was performed at a speed.

Thereafter, a sprayed powder (spherical powder having a particle diameter of 30 to 100 μm) of white metal (9.0% by weight of Sb, 5.5% by weight of Cu, and the balance of Sn) was used for these bearings. Thermal spraying was performed at an extremely high speed of 1200 m / sec, and both were coated to a thickness of 10 mm.

Next, both bearings were placed in a heating furnace for 200 hours.
C. for 36 hours to carry out diffusion adhesion heat treatment.
The thickness of the diffusion reaction layer at the interface between the metal intermediate layer and the coating layer was about 10 μm. Thereafter, the surfaces of the white metal layers of these bearings were finished by machining to a roughness of Ra 0.25 μm or less.

As a result of observing the cross section of these bearings with an optical microscope, the porosity of the film made of atomized powder was about 5%, while the porosity of the film made of pulverized powder was about 23%.
Met.

A bearing sliding test was performed on these two types of bearings. The bearing sliding test was performed for 12Cr
A 300 mm diameter cylindrical rod made of steel was used for the shaft, the bearing pressure was 200 kg / cm ² , and the shaft was rotated at 3,000 rpm for 5 hours.

As a result of the bearing sliding test, no scratches or the like were observed on the 12Cr steel shaft and no seizure occurred in the bearing using the atomized powder. In addition, the bearing coated white metal layer does not have any problematic scratches or extreme wear damage, has good sliding characteristics, and the white metal layer is hardly worn and has good wear resistance Met. On the other hand, in the case of bearings with ground powder,
In the test for about 2.5 hours, a crack was formed inside the metal intermediate layer, the white metal layer was separated, and seizure occurred.

It should be noted that the present invention is not limited to the above-described embodiments and examples, and can be carried out with appropriate modifications without departing from the scope of the invention. For example, a part of the bearing surface can be repaired by the above-described method for manufacturing a bearing component.
Further, a bearing component used for a gas turbine, a steam turbine, or a diesel engine can be manufactured by the above-described materials and the manufacturing method.

[0065]

According to the present invention, a metal intermediate layer is provided on the surface of a bearing substrate, and a mechanical
By ensuring chemical adhesion, a long-life and highly reliable bearing component, and a method for manufacturing and repairing the same can be provided.

That is, the advantages of the formation of the white metal layer by the thermal spraying method include the necessity of no pretreatment, the environmental advantage by omitting the plating step, and the simplification of the final machining step. In addition, the adhesion between the white metal layer and the bearing substrate can be significantly improved. As a result, a bearing component having a long life, excellent reliability, and excellent cost can be realized, and a manufacturing method and a repair method thereof can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example in which a bearing component according to an embodiment of the present invention is applied to a radial bearing.

FIG. 2 is a schematic view showing an example in which the bearing component according to the embodiment of the present invention is applied to a thrust bearing.

FIG. 3 is a diagram schematically showing a cross-sectional structure of a bearing component according to an embodiment of the present invention after diffusion adhesion heat treatment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bearing base material 2 ... Metal intermediate layer 3 ... White metal coating layer 4 ... Diffusion reaction layer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Yoshinobu Makino 2--4, Suehirocho, Tsurumi-ku, Yokohama, Kanagawa Prefecture Inside the Toshiba Keihin Works Co., Ltd. (72) Masaki Kataoka 2--4, Suehirocho, Tsurumi-ku, Yokohama, Kanagawa Address Toshiba Keihin Works Co., Ltd. (72) Inventor Mamoru Sato 2-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture F-term in Toshiba Keihin Works Co., Ltd. CB31 CB35 CB37 CB39 DA01 EA12 FA01

Claims (12)

[Claims] 1. A bearing component having a wear-resistant coating layer made of white metal applied to a bearing substrate by a thermal spraying method, wherein a metal element layer or an alloy layer having a melting point of 1100 ° C. or less is coated with metal particles. A bearing component provided as an intermediate layer between the white metal and the bearing base material. 2. A method according to claim 1, wherein the main component of the intermediate layer is aluminum,
The bearing component according to claim 1, wherein the bearing component is made of any one of copper, zinc, antimony, lead, and tin. 3. A method for manufacturing a bearing component having a wear-resistant coating layer made of white metal on a bearing base material, wherein the intermediate layer according to claim 1 or 2 is coated on the bearing surface of the bearing base material by a thermal spraying method. After that, a coating step of coating the white metal layer by a thermal spraying method, a diffusion adhesion treatment step of performing diffusion adhesion heat treatment on the component after the coating by heating the melting point of the white metal or less in a heating furnace, A method for manufacturing a bearing component, comprising: 4. The method according to claim 3, wherein, as the coating step, the particles of the coating material are sprayed at a speed of 350 m / s to 1500 m / s using a high-speed flame spraying method or an ultra-high-speed flame spraying method. A manufacturing method of the bearing component described in the above. 5. The particle having a diameter of 10 μm to 200 μm.
5. The method for manufacturing a bearing component according to claim 4, wherein said bearing component is used. 6. A method for manufacturing a bearing component according to claim 3, wherein spherical powder is used as the thermal spray powder for said white metal and said intermediate layer. 7. The diffusion adhesion heat treatment is characterized in that the bearing substrate coated with white metal is heated and held in a heating furnace at 100 ° C. to 250 ° C., which is lower than the melting point temperature of white metal, for 30 minutes to 50 hours. The method for manufacturing a bearing component according to any one of claims 3 to 6. 8. The manufacturing of a bearing part according to claim 3, wherein a diffusion layer is formed at an interface between the intermediate layer and the white metal layer to a thickness of 2 μm to 200 μm. Method. 9. The method according to claim 3, wherein a powder having a Brinell hardness of 30 ° C. or higher at room temperature is used as the thermal spray powder of the intermediate layer. 10. A method of manufacturing a bearing component having a wear-resistant coating layer made of white metal on a bearing substrate, wherein an intermediate layer between the white metal and the bearing substrate is provided on a bearing surface of the bearing substrate. .01 mm to 10 mm,
The white metal layer to a thickness of 1 mm to 30 mm,
A method for producing a bearing component, wherein the coating is performed by a thermal spraying method so that the porosity of the two components is 20% or less. 11. The method according to claim 7, wherein the first and second steps are performed in the same manner.
A method for repairing a bearing component, wherein a part of the bearing surface is repaired by the manufacturing method according to any one of the above. 12. A gas turbine, a steam turbine, and a gas turbine manufactured by the manufacturing method according to any one of claims 3 to 10.
Or bearing parts used for diesel engines.