JPS583939A - Frictional sliding material - Google Patents

Abstract

PURPOSE:To obtain a friction material having uniform quality free from segregation and high stability by mixing and granulating frictional constituting materials consisting of metallic powder, etc. beforehand then coating the same with metals and subjecting these to a binding treatment. CONSTITUTION:The frictional constituting materials contg. 10-90vol% metallic powder and/or powdery carbonaceous material as an essential component in compounding components, further contg. >=1 kind of oxides, carbides and nitrides of metals, or >=1 kind of graphite, boron nitride and metallic sulfides as a solid lubricating material and, if necessary, added with a filler, a binder, etc. are mixed and uniformly dispersed by wet kneading or the like, after which the mixture is granulated to particles of 0.05-3mm. average grain sized and copper or a copper alloy is coated on the surfaces threreof by plating or the like. These granules are premolded, and the moldings are subjected to a binding treatment by a method such as sintering in a reducing atmosphere, whereby the frictional material is obtained. The above-mentioned metallic powder consists of copper, iron, tin, titanium, chromium, nickel or alloys of these metals.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a friction sliding material (hereinafter simply referred to as a friction material) used for brakes of vehicles such as automobiles and railways, and industrial machinery.

Sintered friction sliding materials have conventionally been manufactured by mixing and molding metal compound materials as friction constituent materials, lubricants, and binders, and then sintering the mixture in a high-temperature reducing atmosphere.

However, when these ingredients are mixed individually, non-uniformity called segregation is unavoidable due to the difference in specific gravity of each ingredient and the attached shape. It was difficult to maintain this uniform dispersibility until the molding process, which was undesirable in terms of maintaining quality stability as a friction material.

The present invention has been made to solve the above-mentioned problems, and by pre-mixing the ingredients and granulating them, coating and bonding them with metal, the ingredients can be uniformly dispersed and between each single particle. The composition of each formulation was the same! The purpose of the present invention is to provide a friction material with uniform quality and excellent stability.

The present invention is made by bonding particles of mixed ingredients, and the particles have an average particle diameter of 005 to 3111111, and the particle surface is coated with metal, and the constituent material is metal powder and/or powder. This friction sliding material is characterized in that it uses carbonaceous material as a soil material and contains these components by volume of 10 to 90%.

To manufacture the friction material of the present invention, first, the friction components, lubricant, and other ingredients constituting the particles are mixed and dispersed uniformly by, for example, wet kneading, which reduces separation and segregation due to differences in specific gravity. It is granulated into particles with an average particle diameter of 0.05 to 3 mm.

In this case, if the average particle diameter is less than 0.0511 m, the ratio of the metal coating material as a binder will be too low, and the performance as a friction sliding material will be at its limit. Moreover, if it exceeds 3 Tlm, the ratio of the gaps between bonded particles becomes too large, which tends to cause the disadvantage that the structural strength decreases.

The surfaces of the particles are plated with metal and coated with metallization, vapor deposition, or the like. Copper, a copper-based alloy, or the like is used as the coating metal, which prevents each particle from breaking and facilitates subsequent bonding.

The particles containing the metallized friction component, lubricant, etc. are then preformed in the presence or absence of other auxiliary binders and then subjected to a bonding process. This bonding process may be performed, for example, by sintering in a reducing atmosphere, by copper brazing, or by using organic or inorganic binders (e.g. ceramic binders).
Any method such as hard bonding according to et al.

In the present invention, the metal powder used as the constituent material of the particles is a friction constituent material, and is made of, for example, copper, iron (steel), tin, titanium, chromium, nickel, or an alloy of these metals, and has a shape and shape. In addition to powders such as pulverized powder, atomized powder, and electrolytic powder, it also includes chopped fibers, cutting waste, etc.

In addition, the powdered carbonaceous material used as a constituent material of particles acts as a caking substance during particle formation, which is later solidified by high-temperature heating to form particles, and after solidification, a metal coating such as plating is formed on the surface. The capacitance of the constituent material, which also functions as a conductive material, is 10 to 90. These ingredients are 10
If the capacitance is less than 1, the conductivity during surface metal plating will be low.
Insufficient metal coating will make the process untenable.

In the present invention, the particles include one or more of the above-mentioned metal powders, quaternaries, metal carbides, and metal nitrides, and one or more of graphite, boron nitride, and metal sulfides as solid lubricants. There is no problem in containing the above, and there is also no problem in containing other inorganic or organic fillers and suitable binders.

As described above, the friction sliding material of the present invention is made by bonding particles of mixed ingredients, and the particles have an average particle diameter of 0.05 to 3 mm and have metal-coated surfaces. Because the particles are formed and bonded without being destroyed while maintaining the ingredients uniformly dispersed within the single particles, the ingredients are the same between each single particle and the ingredients are distributed throughout the friction material. is uniformly dispersed, providing a friction material with uniform quality and excellent stability.Since it contains 10 to 90% of these components by volume, it provides a friction sliding material with a stable coefficient of friction without segregation of components. There are advantages to doing so.

-7- 209-

Claims (1)

[Scope of Claims] (1) It is made up of particles that are a mixture of blended ingredients, and the particles have an average particle diameter of 005 to 3, and the particle surface is coated with metal. A friction sliding material characterized in that the raw material is metal powder and/or powdered carbonaceous material and contains 10 to 90 volumes of these components. (2) The friction sliding material according to claim (1), wherein the metal coating on the particle surface is made of copper or a copper-based alloy. (3) Claim No. (2008) in which the metal powder is made of copper, iron, tin, titanium, chromium, nickel, or an alloy of these metals.
The friction sliding material described in item 1) or item (2). (4) The friction sliding according to claim 111, (2), or (3), in which the particles contain one or more of metal oxides, metal carbides, and metal nitrides as a friction constituent material. Material. (6) Claims (1), (2), (3), or (4) in which the particles contain one or more of graphite, boron nitride, and metal sulfide as a solid lubricant. Frictional sliding material as described in section.