Preparation method of powder metallurgy brake pad friction block for high-speed train

A technology of powder metallurgy and high-speed trains, applied in friction linings, chemical instruments and methods, mechanical equipment, etc., can solve the problems of increased production cost of friction blocks, high price of friction block raw materials, poor wear resistance of friction blocks, etc., to achieve The effect of low production cost, moderate hardness, high crack resistance and wear resistance

Active Publication Date: 2017-12-08
山东百德瑞轨道交通科技有限公司
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing friction block preparation method is relatively cumbersome, the production process takes a long time, and the price of raw materials for preparing the friction block is generally high, which leads to an increase in the production cost of the friction block, and the wear resistance of the produced friction block is generally poor. Easy to cause loss during the process, and the service life is short

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of a powder metallurgy brake pad friction block for a high-speed train proposed by the present invention comprises the following steps:

[0019] S1. Put the friction block raw materials in drying equipment for drying operation, then take the corresponding weight parts of the raw materials and put them in the mixer, add the raw materials and mix for 300 minutes during the mixing process, and then get the mixed friction block powder, the friction block Including raw materials in the following weight percentages: Fe20%, MoS 2 2%, graphite 15%, chromite powder 10%, hematite powder 10%, mullite powder 3%, Cu 40%;

[0020] S2. Prepare the friction block semi-finished product, put the mixed friction block powder obtained in the step S1 into an automatic powder press for molding and pressing, and control the pressure to 300MPa, and the holding time is 60s;

[0021] S3. Put the friction block pressed in step S2, together with the steel back and welding p...

Embodiment 2

[0023] The preparation method of a powder metallurgy brake pad friction block for a high-speed train proposed by the present invention comprises the following steps:

[0024] S1. Put the friction block raw materials in the dryer for drying operation, then take the corresponding weight parts of the raw materials and place them in the mixer, and mix the materials for 300 minutes to obtain the mixed friction block powder. The friction block includes the following weight percentages Raw materials: Fe15%, MoS 2 1%, graphite 14%, chromite powder 5%, hematite powder 10%, mullite powder 5%, Cu 50%;

[0025] S2. Prepare the friction block semi-finished product, place the mixed friction block powder obtained in step S1 in an automatic powder press for molding and pressing, and control the pressure to 500MPa, and the holding time is 30s;

[0026] S3. Put the friction block pressed in the step S2 together with the steel back and welding piece into the atmosphere sintering furnace for si...

Embodiment 3

[0028] The preparation method of a powder metallurgy brake pad friction block for a high-speed train proposed by the present invention comprises the following steps:

[0029] S1. Put the friction block raw materials in the dryer for drying operation, then take the corresponding weight parts of the raw materials and place them in the mixer, and mix the materials for 300 minutes to obtain the mixed friction block powder. The friction block includes the following weight percentages Raw materials: Fe20%, MoS 2 2%, graphite 15%, chromite powder 10%, hematite powder 8%, mullite powder 10%, Cu 35%;

[0030] S2. Prepare the friction block semi-finished product, put the mixed friction block powder obtained in the step S1 into an automatic powder press for molding and pressing, and control the pressure to 200MPa, and the holding time is 60s;

[0031] S3. Put the friction block pressed in the step S2 together with the steel back and welding piece into the atmosphere sintering furnace f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Wear rateaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a powder metallurgy brake pad friction block for a high-speed train. The preparation method comprises the following steps that 1, friction body raw materials are placed into a drying machine to be dried, the corresponding weight parts of raw materials are placed into a mixing machine to be mixed, the mixture is transferred into an ultrasonic apparatus for ultrasonic treatment, and mixed friction body powder is obtained, wherein the friction body is prepared from Cu, Fe, MoS2, graphite, chromite powder, hematite powder and mullite powder; 2, the mixed friction body powder obtained in the step 1 is placed into an automatic powder pressing machine to be pressed and formed; and 3, the pressed friction block, a steel back and a welding pad are placed into an atmosphere sintering furnace to be sintered, and therefore the finished product is obtained. According to the preparation method, the process is simple, operation is easy, the cost is low, the prepared brake pad friction block is stable in friction performance, the friction coefficient can reach 0.35 or above, the abrasion rate is low, the hardness is moderate, cracking resistance and wear resistance are high, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy brake pads for high-speed trains. The invention relates to the field of powder metallurgy friction materials, in particular to a method for preparing powder metallurgy brake pad friction blocks for trains with a maximum speed of 250 km / h. Background technique [0002] With the development of science and technology, China's rail transit technology is becoming more and more developed, and the number of high-speed rail and bullet trains used in the market is also increasing. Brake pads are key components and consumable parts of high-speed train braking systems. There are two types of brake pads commonly used at present: powder metallurgy materials and synthetic materials. Synthetic materials are not suitable for the braking requirements of high-speed trains due to their low strength, poor heat resistance, and severe thermal degradation; powder metallurgy friction materials are due to their ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/027F16D2200/0008F16D2200/0086
Inventor 王震宁张少司董小江林君山李斌
Owner 山东百德瑞轨道交通科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap