KR20110118283A - Non oil supplying and antirust sinterred bearing - Google Patents

Non oil supplying and antirust sinterred bearing Download PDF

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Publication number
KR20110118283A
KR20110118283A KR1020100037787A KR20100037787A KR20110118283A KR 20110118283 A KR20110118283 A KR 20110118283A KR 1020100037787 A KR1020100037787 A KR 1020100037787A KR 20100037787 A KR20100037787 A KR 20100037787A KR 20110118283 A KR20110118283 A KR 20110118283A
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KR
South Korea
Prior art keywords
weight
powder
stainless steel
cylindrical
sintered
Prior art date
Application number
KR1020100037787A
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Korean (ko)
Inventor
김성희
최원호
Original Assignee
주식회사 에스지오
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Priority to KR1020100037787A priority Critical patent/KR20110118283A/en
Publication of KR20110118283A publication Critical patent/KR20110118283A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/128—Porous bearings, e.g. bushes of sintered alloy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy

Abstract

The present invention relates to an oil-free rust-resistant sintered bearing that can be used for a long time in an environment where rust is easy, such as in a pumping station. A copper plating layer is formed on an inner surface of a cylindrical stainless steel, and a nickel (Ni) is formed on the inner diameter of the cylindrical stainless steel. 2-45% by weight, tin (Sn) 1-20% by weight, carbon (C) powder 1-20% by weight, molybdenum phosphide (MoS 2 ) 1-5% by weight, phosphorus (P) 0.5-5% by weight To form a non-ferrous solid lubricating layer on the inner surface of the cylindrical stainless steel by inserting and sintering a cylindrical powder compact made of a non-ferrous sintered powder of 1-10% by weight of phosphor bronze alloy, the remainder being copper (Cu). It features.

Description

Oil-Free Anti-rust Sintered Bearings {NON OIL SUPPLYING AND ANTIRUST SINTERRED BEARING}

The present invention relates to an oil-free rust-resistant sintered bearing, and more particularly, to an oil-free rust-resistant sintered bearing that can be used for a long time in an environment where rust is easy, such as in a pumping station.

Conventionally, in order to achieve high load resistance (or high strength) and high wear resistance, ferrous metal powders (copper powders are mainly mixed with iron powders) on steel base surfaces made of carbon steel or steel steel, and nickel, tin and other A powder mixed selectively with a metal powder) and fine powders of solid lubricants such as graphite, molybdenum disulfide, and tungsten disulfide are cold pressed by a press or a rolling roller, etc., and then placed in a sintering furnace and heated to a high temperature under a gas atmosphere. A number of sliding bearings having a steel-based iron-based sintered solid sintered layer produced by sintering have been introduced.

An example is described in the invention of Korean Patent Publication No. 10-286246. No. 10-286246 is "steel back metal; and the steel back metal is bonded at the same time and sintered at 1065 ℃ -1095 ℃, 10-30 parts by weight of the iron-based alloying layer consisting of iron; and, And a dry lubricant contained in the iron-based alloying layer; wherein the dry lubricant is at least one of 0.1 parts by weight to 6.5 parts by weight of graphite or 0.1 parts by weight to 7.0 parts by weight of molybdenum disulfide. It is starting.

Another example is described in the invention of Korean Patent Publication No. 10-707694. No. 10-707694 discloses a sliding bearing in which a mixed powder of an iron-based metal powder and a solid lubricant powder is coated on a friction side surface of a steel base to form a sintered layer, wherein the sintered layer is placed inside a mold installed in the sintering furnace. Sliding bearing at a temperature of 600 ℃ to 1060 ℃, while the solid-state sintering bearing having a solid sintering layer, characterized in that molded by pressing in a predetermined pressure range by a pressing means in the inside of the mold.

These sliding bearings perform a lubricating function by the solid lubricant powder contained in the sintered layer.

However, these sliding bearings that form a sintered layer using the iron-based metal powder have a disadvantage in that the sintered layer cannot be lubricated due to rust in a short period of time when used as a component of a device or a machine that is operated in water such as a pumping station. .

The present invention has been made to solve the above problems of the conventional sintered bearing, and the problem to be solved by the present invention is that it will not rust even when used for a long time in water, especially in an environment that is easy to rust, such as in a pumping power plant. To provide a lubricant-free sintered bearing that can maintain the lubrication function without.

The above object of the present invention is to form a copper plating layer on the inner surface of the cylindrical stainless steel, 2-45% by weight of nickel (Ni), 1-20% by weight of tin (Sn), and carbon on the inner diameter of the cylindrical stainless steel. (C) 1-20% by weight of powder, 1-5% by weight of molybdenum phosphide (MoS 2 ), 0.5-5% by weight of phosphorus (P), 1-10% by weight of phosphor bronze alloy powder, the remainder being copper (Cu) It is solved by the oil-free rustproof sintered bearing in which the cylindrical powder compact made of nonferrous sintered powder is closely inserted and sintered to form a nonferrous lubricating sintered layer on the inner surface of the cylindrical stainless steel.

According to the present invention having the above-described configuration, even when the sintered bearing is used in equipment or machinery operated in water or in an environment where rust is easy to be used such as a pumping power plant, the sintered layer does not rust and can maintain a lubricating function for a long time. It works. In addition, according to the present invention, since the metal bond is formed between the stainless steel and the sintered layer during the sintering process, there is a risk that the inner surface of the stainless steel and the sintered layer are separated even if the impact and vibration is severely applied to the sintered bearing during use or high heat is applied. In addition, when the lubricant is impregnated into the internal pores, the leakage of the lubricant does not occur through the joint surface between the inner surface of the steel and the sintered layer, and even when machining the sintered layer, it can be safely processed without fear of peeling the sintered layer. It works.

1 is a perspective view of a cylindrical stainless steel copper plated on the inner surface according to the present invention.
2 is a perspective view of a cylindrical powder compact formed of a nonferrous sintered powder according to the present invention.
Figure 3 is a perspective view of the pressure jig used in the sintering process of the oil-free rustproof sintered bearing according to the present invention.
4 is a cross-sectional view showing a sintering method of the oil-free rust-resistant sintered bearing according to the present invention.
5 is a perspective view of an oil-free rust preventive sintered bearing according to the present invention.
Figure 6 is a manufacturing process diagram of the oil-free rust-resistant sintered bearing according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the oil-free rustproof sintered bearing according to the present invention, a copper plating layer 3 is formed on the inner surface of the cylindrical stainless steel 1, and the inner diameter of the cylindrical stainless steel 1 is 2-45 wt% of nickel (Ni), 1-20% by weight of tin (Sn), 1-20% by weight of carbon (C) powder, 1-5% by weight of molybdenum fluoride (MoS 2 ), 0.5-5% by weight of phosphorus (P), phosphor bronze alloy powder 1- The non-ferrous solid lubricating layer 21 is formed on the inner surface of the cylindrical stainless steel 1 by closely inserting and sintering the cylindrical powder compact 5 made of the non-ferrous sintered powder, which is 10% by weight and the remainder is copper (Cu). Characterized in that formed.

1 to 6, a method of manufacturing an oil-free rustproof sintered bearing according to the present invention will be described.

As shown in Figure 6, in order to manufacture the oil-free rust-resistant sintered bearing according to the present invention is prepared a cylindrical stainless steel (1), non-ferrous sintered powder and pressure jig (7, 9a, 9b) (101, 103, 105).

As shown in FIG. 1, a copper plating layer 3 is formed on an inner surface of the cylindrical stainless steel 1. The use of stainless steel as the base material of the oil-free rustproof sintered bearing according to the present invention is due to the corrosion resistance of stainless steel. The reason for forming the copper plating layer 3 on the inner surface of the steel material 1 is for metal bonding with nonferrous sintered powder containing copper as a main component.

The non-ferrous sintered powder is composed of only metal powders that are rust preventive in water. The non-ferrous sintered powder component is 2-45% by weight of nickel (Ni), 1-20% by weight of tin (Sn), 1-20% by weight of carbon (C) powder, 1-5% by weight of molybdenum phosphide (MoS2), 0.5-5% by weight of phosphorus (P), 1-10% by weight of phosphor bronze alloy powder, the remainder is composed of copper (Cu). In particular, weldability and sinterability can be improved by using phosphor bronze alloy powder. Phosphor bronze alloy powder is composed of 5-20% by weight of tin (Sn), 0.1-3% by weight of phosphorus (P), and the remainder is copper (Cu) powder. Since the metal powder of such a component does not contain iron powder, it is a unique advantage that it does not rust even after long-term use in water.

As can be seen with reference to Figures 2 and 6, the non-ferrous sintered powder is cold pressed to form a cylindrical powder compact (5). The inner diameter of the cylindrical powder compact 5 is of a size that can be closely inserted into the inner diameter of the cylindrical stainless steel 1.

As can be seen with reference to Figures 3 and 6, the pressing jig (7, 9a, 9b) is a pair of semi-cylindrical pressing jig (9a, 9b) inserted into the cylindrical powder compact 5 and the It consists of a wedge-shaped press jig 7 inserted in the middle of a set of semi-cylindrical press jigs 9a and 9b to push the semi-cylindrical press jigs 9a and 9b outward during sintering. Inside the semi-cylindrical pressing jig 9a, 9b, there is formed a wedge-shaped cavity 11a, 11b corresponding to the wedge-shaped pressing jig 7. The outer diameter of the wedge-shaped pressing jig 7 is slightly larger than the inner diameter of the wedge-shaped cavities 11a and 11b.

As can be seen with reference to FIGS. 4 and 6, the cylindrical powder compact 5 is inserted into the cylindrical stainless steel 1, and the pressure jig 7, 9a and 9b are inserted into the cylindrical powder compact 5. ), The wedge-shaped press jig 7 is sintered by gradually pressing the wedge-shaped pressure jig 7 into the puncher 19 of the press while maintaining the internal temperature of the sintering furnace 13 at 750 ° C. to 850 ° C. by the heater 15. . When the wedge-shaped pressing jig 7 proceeds downwardly, the semi-cylindrical pressing jig 9a, 9b opens outward while applying pressure in the outer diameter direction to the cylindrical powder compact 5, while pressurizing is performed. The non-ferrous sintered powder is sintered, and the metal of the non-ferrous sintered powder diffuses to the inner surface of the cylindrical stainless steel 1, thereby joining by metal bonding.

This forms a non-ferrous solid lubrication layer as shown in FIG. The porosity is preferably 1% by volume to 20% by volume. The pores may further penetrate the lubricant. Lubricants, such as gear oil, can be selected as a lubricant to permeate a pore. In addition, in the case of a high-load low-speed sintered bearing, hydrocarbon wax (wax) that is semisolid at room temperature can be penetrated at high temperature and used. Hydrocarbon wax exhibits better properties than gear oil because hydrocarbon wax has a higher lubrication film strength and a larger body expansion ratio than gear oil. I.e. material expansion rate of the hydrocarbon wax is that the significant expansion body 7x10 -4 / K than 2.7 times the amount of lubricating material oozing by the friction heat is larger than many gear oil lubricated gear as 18.8x10 -4 / K improved. In addition, when the molybdenum iodide powder is mixed with gear oil or hydrocarbon wax by 0.5 to 10% by volume, the durability is further improved, and in the case of wax, the effect of increasing the durability is 2.2 times higher than that of the gear oil.

Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, the scope of protection of the present invention is not intended to be limited thereto, and the scope of protection of the present invention is set forth in the detailed description of the claims and all equivalent embodiments thereof. It should be interpreted as crazy.

1: cylindrical stainless steel 3: copper plating layer
5: cylindrical powder compact 7 wedge pressure jig
9a, 9b: Semi-cylindrical pressurizing jig 11a, 11b: Wedge-shaped cavity
13: sintering furnace 15: heater
17: base 19: punch
21: non-ferrous solid lubricating layer

Claims (3)

A copper plating layer was formed on the inner surface of the cylindrical stainless steel, and the inner diameter of the cylindrical stainless steel was 2-45% by weight of nickel (Ni), 1-20% by weight of tin (Sn), and 1-20% by weight of carbon (C) powder. %, Molybdenum iodide (MoS 2 ) 1-5% by weight, phosphorus (P) 0.5-5% by weight, phosphor bronze alloy powder 1-10% by weight, the remainder is a cylindrical powder of non-ferrous sintered powder of copper (Cu) An oil-free rust-resistant sintered bearing characterized in that a non-ferrous solid lubricating layer is formed on the inner surface of a cylindrical stainless steel material by closely inserting and sintering a molded body.
The method of claim 1,
The phosphor bronze alloy powder is tin (Sn) 5-20% by weight, phosphorus (P) 0.1-3% by weight, the rest of the oil-free rust-resistant sintered bearing, characterized in that made of copper (Cu) powder.
The method of claim 1,
The non-ferrous solid lubricating layer has a porosity of 1-20% by volume, oil-free rust-resistant sintered bearing characterized in that the pores of the lubricant selected from gear oil or hydrocarbon wax (wax).
KR1020100037787A 2010-04-23 2010-04-23 Non oil supplying and antirust sinterred bearing KR20110118283A (en)

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Application Number Priority Date Filing Date Title
KR1020100037787A KR20110118283A (en) 2010-04-23 2010-04-23 Non oil supplying and antirust sinterred bearing

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101403605B1 (en) * 2012-10-11 2014-06-11 주식회사 에스지오 Segment sliding bearing with sliding face of discontinuous desity
CN111250714A (en) * 2020-01-16 2020-06-09 吴忠仪表有限责任公司 Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe
KR102198467B1 (en) 2019-08-14 2021-01-05 주식회사 에스지오 Oilless bearing
KR20220055666A (en) 2020-10-27 2022-05-04 주식회사 에스지오 Oilless bearing for high surface pressure applied with high-strength brass alloy with improved microstructure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101403605B1 (en) * 2012-10-11 2014-06-11 주식회사 에스지오 Segment sliding bearing with sliding face of discontinuous desity
KR102198467B1 (en) 2019-08-14 2021-01-05 주식회사 에스지오 Oilless bearing
CN111250714A (en) * 2020-01-16 2020-06-09 吴忠仪表有限责任公司 Method and tool for cladding nickel-based alloy in inner hole of thin-wall small-caliber pipe
KR20220055666A (en) 2020-10-27 2022-05-04 주식회사 에스지오 Oilless bearing for high surface pressure applied with high-strength brass alloy with improved microstructure

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