JPH1081934A - High temperature parts sliding guide material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high temp. parts sliding guide material capable of withstanding high temp. without deteriorating machinability. SOLUTION: This material has a chemical composition consisting of, by weight, 3.5-4.1% C, 1.8-2.4% Si, 0.6-1.0% Mn, 0.3-0.7% P, <=0.1% S, 0.6-1.2% Cr, 1.0-1.5% Ni, 0.03-0.10% B, 0.3-0.6% Cu, and the balance Fe or consisting of, by weight, 2.8-3.4% C, 1.8-2.4% Si, 0.4-0.8% Mn, 0.2-0.5% P, <=0.1% S, 0.3-0.8% Cr, 1.0-1.5% Ni, 0.03-0.10% B, 0.3-0.6% Cu, and the balance Fe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high heat component sliding guide member suitable for a valve guide material provided on a cylinder head of an engine and supporting a valve which slides in a high temperature state.

[0002]

2. Description of the Related Art A four-stroke engine is usually equipped with a valve system. The valve system connects the rotation of the crankshaft to the camshaft by a timing belt, chain or gear, etc., and opens and closes the valve via the rocker arm by rotating the substantially oval cam provided on the camshaft with the shaft. is there.

[0003] As shown in FIG. 9, a valve 11 is generally formed in a mushroom shape and is closed by the force of a coil spring 12. When the valve 11 is pushed and opened by the swing of the rocker arm 13, intake and exhaust can be performed in four cycles of operation, and gas exchange between the combustion chamber and the cylinder can be performed from the opened valve 11. I can do it. The valve 11 is inserted into a hole formed in the cylinder head 14, and exchanges gas in the cylinder by reciprocating through the hole. A valve guide 16 is provided. The valve guide 16 prevents wear of the valve 11 itself and prevents burning of the valve 11 due to heat. Reference numeral 17 in the figure denotes a push rod in an OHV type valve system.

Conventionally, since the valve guide 16 requires extremely strict dimensional accuracy, the hole into which the valve 11 is inserted is formed by precision machining, and the structural material is made in consideration of such machinability and heat resistance. Therefore, alloy cast iron to which boron is added based on so-called gray cast iron is used. By using such an alloy cast iron, the requirements for heat resistance and machinability are satisfied.

[0005]

However, in recent years, the speed of the engine has been increased and the output has been increased, so that the valve itself has been exposed to high-temperature exhaust gas for a long time, and as a result, the valve itself has been heated to a high temperature. A trend has arisen. That is, in the past, the temperature of the valve itself did not exceed 400 ° C., but in recent years, the temperature sometimes exceeded 400 ° C. This raises the problem that the so-called seizure between the valve guide and the valve in the conventional alloy cast iron occurs due to the rise in the temperature of the valve itself. In order to solve this problem, it is conceivable to forcibly cool the valve guide and the valve itself, and to make the valve guide itself from a very hard material that can withstand high temperatures. The cost is extremely high due to a significant improvement, and the use of a hard material for the valve guide has a problem that the workability in manufacturing the valve guide is reduced. An object of the present invention is to provide a high heat component sliding guide material that can withstand high temperatures without deteriorating the machinability by partially depositing a hard substance on the sliding surface of the high heat component.

[0006]

The invention according to claim 1 is
3.5 to 4.1% by weight of C and 1.8 as chemical components
-2.4 wt% Si and 0.6-1.0 wt% Mn
0.3-0.7 wt% P, 0.1 wt% or less S, 0.6-1.2 wt% Cr, 1.0-1.5 wt%
Wt% Ni, 0.03-0.10 wt% B,
It is a high heat component sliding guide material containing 0.3 to 0.6% by weight of Cu and the balance of Fe. The invention according to claim 2 is characterized in that 2.8 to 3.4% by weight of C and 1.8 to
2.4 wt% Si and 0.4-0.8 wt% Mn
0.2 to 0.5% by weight of P, 0.1% by weight or less of S, 0.3 to 0.8% by weight of Cr, 1.0 to 1.5% by weight.
Wt% Ni, 0.03-0.10 wt% B,
It is a high heat component sliding guide material containing 0.3 to 0.6% by weight of Cu and the balance of Fe. In the guide material according to claim 1 or 2, the content of chromium, boron and phosphorus is increased compared to the conventional guide material of so-called gray cast iron, so that boron carbide (B ₃ C) and phosphide are added to the guide material. Hard substances such as iron (Fe ₃ P) and chromium carbide (Cr ₃ C) can be partially precipitated, and by processing this guide material, wear of high heat parts sliding on the processed surface can be reduced. To prevent seizure with hot parts.

According to a third aspect of the present invention, there is provided a sliding guide member having a high heat component according to the first or second aspect, wherein the carbon equivalent is 4.1.
摺 動 5.1 is a high heat component sliding guide material. In the high heat component sliding guide according to the third aspect, when the carbon equivalent is out of the above range, the workability of the guide is reduced.

[0008] The invention according to claim 4 is an invention in accordance with claim 3, Rockwell hardness HR _B is a 94-103, deposited graphite uniform or rose shape arranged in the non-oriented And the size of the graphite flakes is in the range of 6.3 to 25.4 mm at a magnification of 100 times and selected from the group consisting of boron carbide, iron phosphide and chromium carbide.
A high heat component sliding guide material containing 5 to 10% by weight of one or more kinds of precipitation hardened materials. With the high heat component sliding guide material according to the fourth aspect, it is possible to obtain the shape, size, and amount of precipitated graphite for effectively preventing wear resistance and seizure.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. The high heat component sliding guide member in the present embodiment is a valve guide member used for a valve guide supporting an engine valve. The valve guide that supports the valve, which is a high-temperature component, is manufactured by machining, and the high-temperature component sliding guide material that is machined increases the content of chromium, boron, and phosphorus as a chemical component compared to conventional guide materials. 3.5-4.1% by weight of C
1.8 to 2.4% by weight of Si, 0.6 to 1.0% by weight of Mn, 0.3 to 0.7% by weight of P, and 0.1% by weight or less of S , 0.6-1.2% by weight of Cr;
0-1.5% by weight of Ni and 0.03-0.10% by weight
B containing 0.3 to 0.6% by weight of Cu and the balance containing Fe, or 2.8 to 3.4% by weight of C and 1.8 to
2.4 wt% Si and 0.4-0.8 wt% Mn
0.2 to 0.5% by weight of P, 0.1% by weight or less of S, 0.3 to 0.8% by weight of Cr, 1.0 to 1.5% by weight.
Wt% Ni, 0.03-0.10 wt% B,
It contains 0.3 to 0.6% by weight of Cu and the balance Fe.

Due to the above-mentioned chemical components, hard substances such as boron carbide (B ₃ C), iron phosphide (Fe ₃ P) and chromium carbide (Cr ₃ C) are partially deposited on the guide material. In this case, the guide member preferably has a carbon equivalent of 4.1 to 5.1. That is, it is preferable that the total carbon amount obtained by converting silicon (Si) and phosphorus (P) into the carbon amount and adding it to the actual carbon amount is within the range of 4.1 to 5.1. Further, a Rockwell hardness HR _B alloy of such chemical component 94-103, it is preferred that the precipitated graphite are arranged in the non-oriented homogenous or rose-shaped. Further, the size of the graphite flakes is in the range of 6.3 to 25.4 mm in length at a magnification of 100 times, and it is more preferable that the precipitate hardened material contains 5 to 10% by weight.
The shape of the graphite corresponds to A (uniform distribution / non-directional arrangement) or B (loose distribution / non-directional arrangement) of the ASTM standard. No. 4 (length: 25.4 to 12.7 mm at 100 times magnification) and No. 4 5
(12.7 to 6.3 mm in length at a magnification of 100 times). When a valve guide is created by machining a high-temperature component sliding guide material having such a chemical component, a hard substance is partially deposited on the inner surface of a hole, which is a sliding surface of the high-temperature component, in the created valve guide. I do.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; <Example 1> A valve guide for supporting an engine valve was manufactured by machining a guide material. As shown in FIG. 7, the valve guide 16 has an outer diameter of 17 mm and a length of 7 mm.
It was formed into a tube having a hole 16a having a diameter of 0 mm and a diameter of 10 mm. As the chemical components of the guide material, 3.7% by weight of C, 2.19% by weight of Si, and 0.74% by weight of Mn
, 0.7% by weight of P, 0.03% by weight of S,
91% by weight of Cr, 1.5% by weight of Ni, 0.05%
It contains 6% by weight of B, 0.3% by weight of Cu, and the balance Fe.

A lathe was used for machining, and the inner surface of the hole 16a, which is the sliding surface of the valve, was finished. Rockwell hardness HR _B of the valve guide 16 is a 102, the carbon equivalent is 4.66. This valve guide 1
6, as shown in the photograph magnified 100 times in FIG.
Precipitated graphite was uniformly arranged in the non-direction, and the size of the graphite flakes was formed in the range of 5 to 40 mm in length. In order to clearly expose the crystal grain boundaries of the valve guide 16 of the first embodiment, the valve guide 16 was immersed in a 2% nital etching solution (2% concentrated nitric acid alcohol solution), etched, and immediately taken out. . The surface after etching is 5
FIG. 2 shows a photograph magnified 50 times. From this photograph, it can be seen that the precipitation hardened material has effectively appeared on the surface.

<Example 2> A valve guide having the same shape and the same size as in Example 1 was produced by changing the chemical composition of the guide material and performing machining. As a chemical component of the valve guide material,
3.2% by weight C, 2.0% by weight Si, 0.7% by weight Mn, 0.03% by weight P, 0.07% by weight
Of S, 0.58% by weight of Cr, and 1.45% by weight of N
i, 0.03% by weight of B, and 0.58% by weight of Cu
And the balance contains Fe. The Rockwell hardness HR _B of this valve guide is 105 and the carbon equivalent is 3.88. As shown in the photograph enlarged by 100 times in FIG. 3, this valve guide has deposited graphite uniformly arranged in a non-directional manner, and the size of the graphite piece is 5 to 40 mm in length.
Formed in the range. The valve guide of Example 2 was immersed in a 2% nital etching solution and immediately removed after etching. FIG. 4 shows a photograph in which the surface after the etching is magnified 550 times. From this photograph, it can be seen that the precipitation hardened material has effectively appeared on the surface.

Comparative Example 1 A conventional guide member was machined to produce a valve guide of the same shape and size as in Example 1. 3.3 as a chemical component of the conventional valve guide material
5% by weight of C, 1.85% by weight of Si, 0.7% by weight of Mn, 0.25% by weight of P, 0.03% by weight of S and 0.05% by weight of B And the balance contains Fe. Rockwell hardness HR _B of this valve guide is 1
00 and the carbon equivalent is 4.05. In this valve guide, as shown in the photograph magnified 100 times in FIG. 5, the amount of precipitated graphite is smaller than that in Examples 1 and 2, and the size of graphite flakes is formed shorter in the range of 5 to 20 mm in length. Was. The valve guide of Comparative Example 1 was immersed in a 2% nital etching solution and immediately removed after etching. FIG. 6 shows a photograph of the etched surface magnified 550 times. This photograph shows that the amount of the precipitation hardened material is small.

<Comparison Test and Evaluation> Using the wear test apparatus 20 shown in FIG. 7, a wear test was performed on the valve 26 when the valve guides 16 of Examples 1, 2 and Comparative Example 1 were used. In this apparatus 20, a vertical plate 23 is erected on a base 22 on a desk 21, and a mounting member 24 having a hole 24a for horizontally mounting the valve guide 16 is formed on the vertical plate 23. The valve guide 16 to be evaluated can be mounted in the hole 24a, and the valve 26 is inserted from the outside into the hole 16a of the valve guide. A valve spring 27 whose one end is locked to the mounting member 24 is fitted into a shaft 26a of the valve that has been inserted and penetrated through the valve guide 16, and a retainer that locks the other end of the valve spring 27 to the tip of the shaft 16a. 28 is fixed. A peripheral surface of an eccentric cam 29 is in contact with the back surface of the retainer 28, and the eccentric cam 29 is configured to be rotated by a drive motor (not shown). In this device 20, since the valve spring 27 always urges the back surface of the retainer 28 so as to abut the peripheral surface of the eccentric cam 29, the rotation of the eccentric cam 29 as indicated by the solid line arrow causes the valve 26 to pass through the retainer 28. Is configured to reciprocate through a hole 16 a of the valve guide 16. Air heated to 500 ° C. is blown from below onto the valve 26 as shown by an arrow A in the figure, and the valve 26 is heated.

In the test, the valve guides 16 of Examples 1, 2 and Comparative Example 1, which are test samples, were mounted on the mounting members 24, respectively.
And the amount of wear of the shaft portion 26a of the valve 26 after the valve 26 is reciprocated in the hole by a predetermined amount. The valve 26 used for the test is made of an alloy made of iron, and its shaft has an initial diameter of 10 mm.
The eccentric cam 29 has a diameter of 119 mm, and the valve 26 is reciprocated once by one rotation of the cam, so that the moving distance thereof is 13 mm. Cam 29 is 1100
The valve 26 rotates at a rate of rotation / minute, and the moving distance of the valve 26 is 3, 5, 1
The amount of wear was measured at the time of sliding of 0 × 10 ³ m. The amount of abrasion was represented by comparing the diameter of the shaft portion 26a of the valve after sliding with the initial diameter, and expressing the difference between the diameters as the amount of abrasion. FIG. 8 shows the result.

As is apparent from FIG. 8, the amount of wear of the valve 26 in the valve guides 16 of the first and second embodiments is significantly smaller than that of the valve guide of the comparative example 1 which is a conventional product. This is because boron carbide (B ₃
C), iron phosphide (Fe ₃ P) and chromium carbide (Cr ₃ C)
This is considered to be due to a decrease in the friction coefficient at a high temperature due to the partial precipitation of the hard material.

[0018]

As described above, according to the present invention, the sliding guide material having a high heat component has a chemical composition of 3.5 to 4.1.
Wt. C, 1.8-2.4 wt.% Si, 0.6 wt.
-1.0 wt% Mn and 0.3-0.7 wt% P
0.1% by weight or less, 0.6% to 1.2% by weight of Cr, 1.0% to 1.5% by weight of Ni, and 0.03% to
0.10 wt% B and 0.3-0.6 wt% Cu
And the balance contains Fe or the chemical composition of the alloy cast iron is 2.8 to 3.4% by weight of C, 1.8 to 2.4% by weight of Si, and 0.4 to 0. 8% by weight of Mn, 0.2 to
0.5% by weight of P, 0.1% by weight or less of S, 0.3% by weight
0.8% by weight of Cr and 1.0% to 1.5% by weight of Ni
And 0.03 to 0.10% by weight of B, and 0.3 to 0.6.
By containing Cu by weight and Fe in the balance, hard materials such as boron carbide (B ₃ C), iron phosphide (Fe ₃ P) and chromium carbide (Cr ₃ C) are partially deposited on the guide material. be able to. As a result, it is possible to obtain a high heat component sliding guide material that can withstand high temperatures by preventing an increase in the coefficient of friction between the high heat component and the high heat component sliding guide material at high temperatures.

Further, when the carbon equivalent is in the range of 4.1 to 5.1, a hard substance can be effectively deposited partially in the guide material, and the cutting workability of the sliding guide material for high heat components can be improved. Is not reduced. Further, Rockwell hardness HR _B is a 94 to 103, the size of the precipitated graphite arranged in a non-oriented homogenous or rose-like and the graphite piece 100
One or two or more precipitation hardened materials selected from the group consisting of boron carbide, iron phosphide, and chromium carbide are in a range of 6.3 to 25.4 mm in length at a magnification of 2 to 5% by weight. If it is contained, the shape, size, and amount of precipitated graphite for effectively preventing wear resistance and seizure can be obtained, and a high-temperature component sliding guide material that can sufficiently withstand high temperatures can be obtained.

[Brief description of the drawings]

FIG. 1 is a photomicrograph showing a metallographic structure of a guide material before etching according to Example 1 of the present invention, which is enlarged by 100 times.

FIG. 2 shows the surface of the guide material after etching of Example 1 as 5
The microscope photograph figure which shows the metal structure expanded 50 times.

FIG. 3 shows the surface of the guide member before etching in Example 2 as 1
FIG. 3 is a micrograph showing a metal structure enlarged to a magnification of 00 times.

FIG. 4 shows the surface of the guide material after etching of Example 2 as 5
The microscope photograph figure which shows the metal structure expanded 50 times.

FIG. 5 shows the surface of the guide member before etching in Comparative Example 1 as 1
FIG. 3 is a micrograph showing a metal structure enlarged to a magnification of 00 times.

FIG. 6 shows the surface of the guide material after etching of Comparative Example 1 as 5
The microscope photograph figure which shows the metal structure expanded 50 times.

FIG. 7 is a configuration diagram of a valve wear test device.

FIG. 8 is a view showing the respective wear amounts of the valves after the valve guides of Example 1 and Example 2 and the valve guide of Comparative Example 1 were tested by the test apparatus.

FIG. 9 is a sectional view showing a state where the valve guide is used.

[Explanation of symbols]

 16 Valve guide

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[Procedure amendment]

[Submission date] September 6, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

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FIG.

[Procedure amendment 2]

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[Procedure amendment 3]

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[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

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[Procedure amendment 5]

[Document name to be amended] Drawing

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[Procedure amendment]

[Submission date] September 18, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

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[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

The invention according to claim 4 is the invention according to any one of claims 3 to 3, wherein the Rockwell hardness is HRB.
94 to 103, in which the precipitated graphite is arranged in a uniform or loose manner in a non-directional manner, and the size of the graphite flakes is in the range of 6.3 to 25.4 mm at a magnification of 100 times, and boron carbide, 1 selected from the group consisting of iron phosphide and chromium carbide
It is a high heat component sliding guide material on which 5 to 10% by weight of a kind or two or more kinds of precipitation hardened substances are precipitated . With the high heat component sliding guide material according to the fourth aspect, it is possible to obtain the shape, size, and amount of precipitated graphite for effectively preventing wear resistance and seizure.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

Due to the above-mentioned chemical components, hard substances such as boron carbide (B ₃ C), iron phosphide (Fe ₃ P) and chromium carbide (Cr ₃ C) are partially deposited on the guide material. In this case, the guide member preferably has a carbon equivalent of 4.1 to 5.1. That is, it is preferable that the total carbon amount obtained by converting silicon (Si) and phosphorus (P) into the carbon amount and adding it to the actual carbon amount is within the range of 4.1 to 5.1. Further, it is preferable that the Rockwell hardness of the alloy having such a chemical component is HRB 94 to 103, and the precipitated graphite is uniformly or non-uniformly arranged in a non-directional manner. Further, the size of the graphite flakes is in the range of 6.3 to 25.4 mm in length at a magnification of 100 times, and it is more preferable that the precipitation hardened material precipitates in 5 to 10% by weight.
The shape of the graphite corresponds to A (uniform distribution / non-directional arrangement) or B (loose distribution / non-directional arrangement) of the ASTM standard. No. 4 (length: 25.4 to 12.7 mm at 100 times magnification) and No. 4 5
(12.7 to 6.3 mm in length at a magnification of 100 times). When a valve guide is created by machining a high-temperature component sliding guide material having such a chemical component, a hard substance is partially deposited on the inner surface of a hole, which is a sliding surface of the high-temperature component, in the created valve guide. I do.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

A lathe was used for machining, and the inner surface of the hole 16a, which is the sliding surface of the valve, was finished. The Rockwell hardness of this valve guide 16 is HRB 102 and the carbon equivalent is 4.66. This valve guide 1
6, as shown in the photograph magnified 100 times in FIG.
Precipitated graphite was uniformly arranged in the non-direction, and the size of the graphite flakes was formed in the range of 5 to 40 mm in length. In order to clearly expose the crystal grain boundaries of the valve guide 16 of the first embodiment, the valve guide 16 was immersed in a 2% nital etching solution (2% concentrated nitric acid alcohol solution), etched, and immediately taken out. . The surface after etching is 5
FIG. 2 shows a photograph magnified 50 times. From this photograph, it can be seen that the precipitation hardened material has effectively appeared on the surface.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

<Example 2> A valve guide having the same shape and the same size as in Example 1 was produced by changing the chemical composition of the guide material and performing machining. As a chemical component of the valve guide material,
3.2% by weight C, 2.0% by weight Si, 0.7% by weight Mn, 0.03% by weight P, 0.07% by weight
Of S, 0.58% by weight of Cr, and 1.45% by weight of N
i, 0.03% by weight of B, and 0.58% by weight of Cu
And the balance contains Fe. The Rockwell hardness of this valve guide is HRB 105 and the carbon equivalent is 3.88. As shown in the photograph enlarged by 100 times in FIG. 3, this valve guide has deposited graphite uniformly arranged in a non-directional manner, and the size of the graphite piece is 5 to 40 mm in length.
Formed in the range. The valve guide of Example 2 was immersed in a 2% nital etching solution and immediately removed after etching. FIG. 4 shows a photograph in which the surface after the etching is magnified 550 times. From this photograph, it can be seen that the precipitation hardened material has effectively appeared on the surface.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

Comparative Example 1 A conventional guide member was machined to produce a valve guide of the same shape and size as in Example 1. 3.3 as a chemical component of the conventional valve guide material
5% by weight of C, 1.85% by weight of Si, 0.7% by weight of Mn, 0.25% by weight of P, 0.03% by weight of S and 0.05% by weight of B And the balance contains Fe. Rockwell hardness of this valve guide is HRB 1
00 and the carbon equivalent is 4.05. In this valve guide, as shown in the photograph magnified 100 times in FIG. 5, the amount of precipitated graphite is smaller than that in Examples 1 and 2, and the size of graphite flakes is formed shorter in the range of 5 to 20 mm in length. Was. The valve guide of Comparative Example 1 was immersed in a 2% nital etching solution and immediately removed after etching. FIG. 6 shows a photograph of the etched surface magnified 550 times. This photograph shows that the amount of the precipitation hardened material is small.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

Further, when the carbon equivalent is in the range of 4.1 to 5.1, a hard substance can be effectively deposited partially in the guide material, and the cutting workability of the sliding guide material for high heat components can be improved. Is not reduced. In addition, Rockwell hardness
There a HRB ninety-four to one hundred and three, the size of the precipitated graphite arranged in a non-oriented homogenous or rose-like and the graphite piece 100
One or two or more precipitation hardened materials selected from the group consisting of boron carbide, iron phosphide, and chromium carbide are in a range of 6.3 to 25.4 mm in length at a magnification of 2 to 5% by weight. Analysis
If it comes out , it is possible to obtain the shape, size, and amount of precipitated graphite for effectively preventing wear resistance and seizure, and it is possible to obtain a high-temperature component sliding guide material that can sufficiently withstand high temperatures.

Claims (4)

[Claims] 1. As a chemical component, 3.5 to 4.1% by weight
C, 1.8 to 2.4% by weight of Si, and 0.6 to 1.
0 wt% Mn, 0.3-0.7 wt% P,
1% by weight or less of S, 0.6 to 1.2% by weight of Cr,
1.0 to 1.5% by weight of Ni, 0.03 to 0.10% by weight of B, 0.3 to 0.6% by weight of Cu, and the balance of F
High heat parts sliding guide material containing e. 2. 2.8 to 3.4% by weight as a chemical component
C, 1.8 to 2.4% by weight of Si, and 0.4 to 0.4% by weight.
8% by weight of Mn, 0.2-0.5% by weight of P;
1% by weight or less of S, 0.3-0.8% by weight of Cr,
1.0 to 1.5% by weight of Ni, 0.03 to 0.10% by weight of B, 0.3 to 0.6% by weight of Cu, and the balance of F
High heat parts sliding guide material containing e. 3. The sliding guide according to claim 1, wherein the carbon equivalent is 4.1 to 5.1. 4. A Rockwell hardness HR _B of 94 to 103.
Wherein the precipitated graphite is uniformly or non-uniformly arranged in a non-directional manner, and the size of the graphite piece is 6.3 at a magnification of 100 times and a length of 6.3.
4 to 25.4 mm, and contains 5 to 10% by weight of one or more precipitation hardened materials selected from the group consisting of boron carbide, iron phosphide and chromium carbide. The sliding guide material of the high heat component described.