Preparation method of powder metallurgy friction material
A friction material and powder metallurgy technology, applied in the field of preparation of powder metallurgy friction materials, can solve the problems of serious wear and insufficient heat resistance, and achieve the effects of high thermal conductivity, small change and small wear
Pending Publication Date: 2021-04-27
ANYANG INST OF TECH
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Problems solved by technology
[0003] Through the above analysis, the existing problems and defects of the prior art are: the traditional powder metallurgy friction material suffers from severe wear and insufficient heat resistance during use
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[0046]In order to make the objectives, technical solutions and advantages of the present invention, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate the invention and are not intended to limit the invention.
[0047]For the problems of the prior art, the present invention provides a method of preparing a powder metallurgy friction material, which will be described in detail below with reference to the accompanying drawings.
[0048]Such asfigure 1 As shown, the preparation method of the powder metallurgy friction material provided in the embodiment of the present invention includes the following steps:
[0049]S101, the preparation of nano silica was prepared using a silicate solution, and nano silica was sufficiently ground, and the grinding object was sieved. The sieve material is a nano silica powder; according to the mass fraction of p...
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Abstract
The invention belongs to the technical field of powder metallurgy materials and discloses a preparation method of a powder metallurgy friction material. The preparation method of the powder metallurgy friction material comprises the steps that powdery raw materials copper, iron, nanometer silicon dioxide, zirconium oxide, molybdenum disulfide, silicon carbide and graphite are used for preparing a mixture, and the mixture is used for preparing a pressure blank; and the pressure blank is fixed and placed in a reducing atmosphere or an inert atmosphere with the condition of 3-6 MPa, the temperature rises up, pressure is exerted, and sintering, forming and cooling are carried out. According to the method, the zirconium oxide, the nanometer silicon dioxide and silicon carbide are adopted for serving as friction components to provide a stable friction coefficient. In comparison with a traditional asbestos resin or metal friction material, the prepared powder metallurgy friction material is high in friction coefficient, the friction coefficient changes a little along with changing of the temperature, pressure and speed, and the friction material is resistant to high temperature, little in abrasion and long in service life. Meanwhile, good physical and mechanical performance and stable friction and abrasion performance can be obtained.
Description
Technical field[0001]The present invention belongs to the technical field of powder metallurgy materials, and more particularly to a method of preparing a powder metallurgy friction material.Background technique[0002]At present, conventional powder metallurgical friction materials are compounds with copper and their alloys, while adding friction components and lubricating components, using powder metallurgical techniques. Composites. Compared with the semi-metallic friction material, the friction material has advantages of good heat resistance, high mechanical strength, stability of friction and wear, and is widely used in the fields of automobiles, ships, construction machinery. However, with the development of equipment to high speed, overloading direction, traditional powder metallurgical friction materials during use, severe wear, insufficient heat resistance, has not met the comprehensive performance of friction materials in contemporary society. Therefore, there is an urgent n...
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IPC IPC(8): B22F3/02B22F3/10B22F7/08C22C30/02C22C32/00C01B32/19C01B33/18
CPCB22F3/02B22F3/1007B22F7/08C22C30/02C22C32/0005C22C9/00C01B33/18C01B32/19
Inventor 王志刚李军苗沛霖高峰刘志旗蔡广开张孟菲郭广召
Owner ANYANG INST OF TECH