JPS59219426A - Production of bearing material - Google Patents

Abstract

PURPOSE:To produce statically and safely a bearing material having the structure in which a fiber reinforcing material is uniformly dispersed in a metal by spraying a mixture composed of metallic powder and heat-resistant fibers on a steel strip and melting the same by heating to unite the mixture to one body on the steel strip then cooling the strip. CONSTITUTION:A mixture 3 composed of metallic powder and heat-resistant fibers is sprayed from a powder spreader 2 onto a steel strip 1, and the metallic powder is quickly heated and melted by a high frequency heating furnace 4. The steel strip 1 is then quenched 6 from the rear surface thereof by the oil which is circulated and maintained at a uniform temp. The surface of the molten metal is at the same time heated by, for example, a ''Siliconit'' heater 5 to grow perpendicularly a dendrite structure from the strip 1. The strip is subjected to water quenching 7 and is cooled to an ordinary temp. then the surface is trimmed with a milling cutter. The bearing material having the fine metallic cast structure dispersed uniformly with, for example, SiC whiskers is thus produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cast bearing material. 7 Relating to a method for manufacturing a cast bearing material having a uniformly dispersed [-] structure in a metal crosspiece, a method for manufacturing a bearing base material by a casting method, which has conventionally been carried out in one direction, is as shown in Fig. 1. Preheat.

A method is used in which gold 6 is melted and poured into the steel, and then rapidly cooled from the surface of the steel strip to solidify it from one direction.

With this manufacturing method, a solidified structure develops vertically on the curved surface, making it possible to obtain a bearing base material that is resistant to loads and highly reliable.7! l
Can be constructed.

For example, when casting a -Cu-Pb alloy (Kelmet) material onto a steel band, the steel band is first cleaned and preheated to 1000 to 050 CK using a high frequency and a silicone heater. And on top of this & Cx15 (Cu-24' heated to 1:!
Pour the molten rPb metal. This pouring operation must be carried out in a KN or non-oxidizing atmosphere in order to obtain sufficient adhesion at the interface between the steel strip and the molten metal. The firefly is rapidly cooled from the back of the steel strip with oil and then water, but temperature control for this cooling is extremely difficult, and due to slight fx hot water temperature variations, the Cu-Pb
The solidification structure of the alloy changes. Therefore.

It is necessary to keep the temperature of oil and water constant at all times. After cooling, mill the Kelmet surface to prepare the surface1.
It is sent to the next processing step and finished as an f1 bearing product.

The bearing base material manufactured using the fxa manufacturing method is used for high loads and L7 bearings that can withstand more than a billion surface pressures.

As mentioned above, in the conventional casting method, it is very difficult to control the heat of the band and the molten metal during pouring, and as a result, the casting structure tends to vary, so it is difficult to control the pouring and cooling process industrially. The biggest problem was the ability to obtain uniform bearing material. [7 or 17] In recent years, with the improvement of the production technology of gold R powder, the production of molded materials using metal powder as a raw material has developed, and the resulting 7 wood invention has overcome the above-mentioned problem 1. b Regardless of temperature control or hazardous methods @ construction, the casting method using a mixture of metal powder and heat-resistant fibers enables uniform dispersion of fibrous reinforcement into the surface, which was not achieved with conventional methods.1. Structure 1-I bearing material;
2.7 An example of the process for manufacturing a bearing material using the -J manufacturing method of the present invention is shown in FIG.

That is, 4f of a mixture of metal powder and heat-resistant fiber is spread on the steel strip 2 by a powder spreader 3 [7, the metal powder is rapidly heated and melted in a high 1 ρ wave heating furnace 5, and then circulated to a uniform temperature. The retained oil is used to rapidly cool the back of the Obidai 2, and then it is cooled with water 8 at room temperature. In this case, −
During the subsequent cooling with oil, the alloy surface is heated, for example, with a siliconite beater 6, in order to obtain vertical WK growth or dendrite structure from the steel strip base material.

For example, a mixture of -Cu-Pb alloy 'jItJ powder and silicon monoxide whiskers is used as a material and 1. -r use, fv field It,
When the temperature is raised to J20OC, after the temperature is raised to +320077, it is rapidly cooled by oil cooling 7 [51] and then water cooling 8. After cooling to room temperature, the surface is prepared using a milling cutter, and the bearing material is obtained. The heating and cooling steps are conducted in a non-oxidizing atmosphere using nitrogen. 'Where are you going?
]-ru. This method of re-melting the metal powder with the component enables temperature control, resulting in a fine cast structure in which silicon carbide whiskers are uniformly dispersed in the Cti-Pb alloy. can be obtained.

In other words, it is possible to uniformly disperse and solidify the fibrous reinforcing material in the metal, which was solidified in the conventional casting method, resulting in a much higher blood pressure than the conventional casting bearing material made of metal powder. In order to obtain bearing materials, we changed from dynamic pouring work where molten metal does not fly away to static work.Safety 1 The work environment has been greatly improved. is not limited to silicon carbide whiskers,
Fibers with heat resistance and reinforcing properties - e.g. metal or d
Non-gold whiskers, inorganic fibers, metal fibers, etc. can be sufficiently used if they are uniformly dispersed.

Example 1 A mixture of 90 parts of Cu-24 chip metal powder and 10 parts of silicon carbide whiskers was spread on a steel strip to a thickness of 3 cm. Heated with high frequency at 1200 pi. In this mixed state, the Cu--Pb alloy was melted and then rapidly cooled from the bottom of the steel strip with oil adjusted to 8 (]υ at a cooling rate of 35 C/see to +500 r [+500 r], and then water-cooled.

The 1-diameter surface of the 1-diameter surface was subjected to 1-haze sealing [~obtained a bearing base material]. The structure of this forest material shows a high-strength composite structure in which silicon carbide whiskers are uniformly dispersed in the cast structure of Ctt-Pb. Shoulder bearings can withstand 200 hours and have excellent sliding performance. , Material of the present invention d Bearing material - Sliding plate of clutch, current collector of electric train'lfj e? -Sliding performance 1: Can be applied to required parts≠; Possible-

[Brief explanation of drawings]

FIG. 1 is a layout diagram of an example of an apparatus for manufacturing a sagging material using a conventional casting method, and FIG. 2 is a layout diagram of an apparatus for manufacturing a bearing turbidity material according to an embodiment of Ruri Kinen. Code]・・・Strip steel 2・・・Bauters bracelet steel band 3・・・・・・
・Mixture of metal powder and heat-resistant fiber 4...High frequency heating furnace 5...Silicone heating momme 1 6...Oil quench 7...T- 1'-Quench 8...
Molten Metal Patent Applicant NDC Co., Ltd. Agent Patent Attorney Yoshikatsu Matsushita Ben Seishiji Fumio Soejima ftri 7 Figure Related Name of Special Applicant Residence NDC Co., Ltd. Representative 4, Agent

Claims (1)

[Claims] Spread a mixture of gold steam powder and IT thermal fiber onto the steel strip, heat and melt the stiffness, integrate it on the steel strip, and cool it - Manufacturing method for recessed bearing material 8