JP2003277784A - Lubricant for use in antifriction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve various problems, which are caused by a conventional grease- based lubricant used for antifriction while materials are rubbed each other, such as intractability depending on a grease and unworkability depending on seizure between the materials. <P>SOLUTION: A lubricant is applied on surfaces of the materials to reduce seizure between them when they are rubbed each other as fastening a bolt and nut. The grease-based lubricant is employed hitherto. Alternatively, by the use of the lubricant of the invention which comprises cetanol and fine particles of graphite powder as main components, satisfactory fastening work is made possible with good coating adhesion and less seizure compared to a prior method. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention does not use a conventional lubricant such as an oil or fat on the surface of a material when the material such as a metal rubs against each other. TECHNICAL FIELD The present invention relates to a lubricant capable of improving lubricity by applying cetanol containing graphite powder to the surfaces of materials that rub against each other to reduce friction. By using this lubricant, for example, the anti-friction effect at the time of tightening the bolts and nuts can be improved and problems such as seizure can be solved.

[0002]

2. Description of the Related Art Conventionally, when materials such as metal materials rub against each other, for example, when bolts and nuts are tightened, or when wire rods are subjected to surface reduction processing,
In many cases, there is a bad condition between the two materials, for example, good work cannot be done without a lubricant. In such a case, in the conventional work process, a grease-based lubricant is applied to the material surface to reduce the friction.

[0003]

Among them, the lubricating oil has many problems in the conventional work such as not being easy to handle and peculiar to the oil and fat system at the time of working, and the oil cannot be evenly applied and adhered. Contains. Further, the members thus produced have various uses and are often used as important parts. Therefore, the surface properties of bolts, nuts and the like must be good.

[0004]

In order to solve the above-mentioned problems in the case where materials are rubbed with each other, the present invention has been variously studied, and as a result, instead of a conventional oil-based lubricant,
The inventors have found that the addition of graphite powder to cetanol has good adhesion after coating on the surface of the material and exhibits very good lubricating performance, and completed the present invention.

The present invention relates to a lubricant whose main component is cetanol to which graphite powder is added when the materials rub against each other.
That is, a lubricant prepared by adding graphite powder to cetanol was applied to the surfaces of the materials that rub against each other to improve the adhesion, and this was also applied to the surfaces of both materials in advance. The present invention relates to a lubricant used in a so-called precoat state.

In the present invention, the materials rubbing against each other include titanium-based materials, stainless-based materials, other steel materials, aluminum-based materials, copper-based materials, and non-metallic materials, and the shape of the materials is not specified. The graphite powder used in the present invention is usually called scaly and earthy graphite, and a purity of 80% or more is usually sufficient. Further, both graphite powders may be mixed and used. A fine powder having an average particle size of 36 μm or less is preferable. This is mixed with, for example, cetanol in a molten state at 70 to 80 ° C. This is applied to the surfaces of the materials that rub against each other. Adhesion after coating is also good with cetanol.

The proper composition of the lubricant in the present invention is that the graphite powder in cetanol is 3% or more, and if it exceeds 17%, the effect is saturated and it is necessary to add more than this amount to the flow of the agent of the present invention. It is unfavorable because it has poor properties and is difficult to handle. Therefore, the proper content of graphite powder in cetanol is 3% and above,
Further, it is set to 17% or less.

The amount of application of the agent of the present invention as a lubricant to the surface of a material is not particularly limited. For example, in the case of tightening bolts and nuts, the thickness is about 3 μm or more up to the diameter of graphite and 70 μm. The following is desirable. If it is less than this, peeling may occur during processing, and even if it is larger than this, the lubricating effect is small, and the gap between both materials in the initial stage of tightening becomes narrow, which may make the work difficult, which is not preferable. .

Depending on the situation at that time, the treatment after coating may be carried out immediately after coating, or may be applied on both surfaces in advance, that is, a so-called lubricant coating type, so that it can be used immediately as it is during work. Either case may be used. In the latter case, the adhesiveness of the lubricant is required, but the lubricant of the present invention has good adhesiveness.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, when a material and a material are rubbed with each other, a lubricant used by coating the surfaces of both materials contains graphite powder instead of the conventional oil-based lubricant. The purpose of the present invention is to provide a lubricant that lubricates by applying cetanol.

[0011]

[Embodiment 1] As an example in which the materials rub against each other, a case of tightening bolts and nuts will be described. In this case, as an example of the method of evaluating the anti-friction of the material of the bolt and the nut, the tightening test of the screw part was performed and the friction coefficient was measured. As a material for bolts and nuts, titanium, titanium alloy (Ti-6Al-4V alloy) bolts (diameter of threaded portion: 10 mm) and nuts that are suitable for this, which are generally considered to be easily seized, are used as a lubricant for the threaded portion. 2% of powdery scaly graphite with an average particle size of 3 μm to 36 μm in cetanol
To an average of 5 to 19%
The test was conducted by applying 0 μm. In addition, the case of using a conventional oil-based lubricant was also compared. As a result, the results shown in Table 1 were obtained.

As can be seen from these results, the case where cetanol is mixed with the scaly graphite powder in an amount of 3% or more, and 17% or less to provide a proper adhesion and an extremely low friction coefficient. It can be seen that good lubricity can be obtained. The lubricant of the present invention has a coating thickness of 50 μm.
It was possible to coat the graphite particles up to about 3 μm in size, and good results were obtained in this thickness range. Similarly, Table 2 shows the results when earth-like graphite was used as the cetanol. In all cases, good results were obtained.

Since the present invention is configured as described above, it has the following effects.

When the materials are rubbed with each other, as in the present invention, by mixing fine graphite powder with cetanol on the surface of the materials, good coating adhesion and seizure can be reduced. By using such a lubricant, it is possible to reduce friction between materials such as titanium-based materials.

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Claims (4)

[Claims] 1. A lubricant in which graphite powder is added to cetanol as a lubricant for reducing friction when the materials rub against each other. 2. From 3% to 17% of the graphite powder according to claim 1, which has an average diameter of 36 μm or less.
Lubricants containing. 3. A lubricant which is used by applying the lubricant according to claim 2 to the surfaces of bolts and nuts. 4. A lubricant which is used by applying the lubricant according to claim 2 to the surface of bolts and nuts made of titanium-based material in an amount of 70 μm or less.