Powder metallurgical brake shoe for railway locomotive

A technology of powder metallurgy and railway locomotives, applied in mechanical equipment, friction linings, etc., can solve problems such as low strength of connection structure, easy riveting structure, safety accidents, etc., and achieve simple structure, low manufacturing cost and stable friction coefficient Effect

Active Publication Date: 2012-04-04
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The riveted connection structure is low in strength and poor in safety, especially when it is frequently used on a vehicle that is adjusted and running, the riveted structure is easy to come out and cause a safety accident
Although the welded structure can overcome the shortcomings of the riveted structure, it still has the disadvantages of complicated manufacturing process and high cost.

Method used

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  • Powder metallurgical brake shoe for railway locomotive
  • Powder metallurgical brake shoe for railway locomotive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The tile nose 2, the positioning groove 3 and the steel back 4 are stamped and formed separately by using a low carbon steel plate, and then welded together to form the tile back 1.

[0019] The friction material block 5 is made by powder metallurgy process, wherein the weight percentage of the friction material block is composed of: graphite 12%, copper 5%, manganese 3%, chromium 3%, nickel 3%, aluminum 2%, molybdenum disulfide 5% , 2% mullite, 4% molybdenum trioxide, and the rest is iron. During the manufacturing process, firstly, the various raw materials are uniformly mixed according to the above-mentioned ratio, and then press-formed, and then the press-formed block and the above-mentioned tile back 1 are put into a sintering mold and assembled together. Then put it into a pressure sintering furnace to complete the sintering process, and the sintering temperature is 1030°C. During the sintering process, the friction material block 5 and the tile back 1 are sintere...

Embodiment 2

[0021] The tile nose 2, the positioning groove 3 and the steel back 4 are stamped and formed separately by using a low carbon steel plate, and then welded together to form the tile back 1.

[0022] The friction material block 5 is made by powder metallurgy process, wherein the weight percentage of the friction material block is composed of: graphite 14%, copper 3%, manganese 1%, chromium 1%, nickel 1%, aluminum 1%, molybdenum disulfide 2% , 5% mullite, 2% molybdenum trioxide, and the rest is iron. During the manufacturing process, firstly, the various raw materials are uniformly mixed according to the above-mentioned ratio, and then press-formed, and then the press-formed block and the above-mentioned tile back 1 are put into a sintering mold and assembled together. Then put it into a pressure sintering furnace to complete the sintering process, and the sintering temperature is 1030°C. During the sintering process, the friction material block 5 and the tile back 1 are sintere...

Embodiment 3

[0024] The tile nose 2, the positioning groove 3 and the steel back 4 are stamped and formed separately by using a low carbon steel plate, and then welded together to form the tile back 1.

[0025] The friction material block 5 is made by powder metallurgy process, wherein the weight percentage of the friction material block is composed of: graphite 13%, copper 4%, manganese 2%, chromium 2%, nickel 2%, aluminum 1%, molybdenum disulfide 4% , 4% mullite, 3% molybdenum trioxide, and the rest is iron. During the manufacturing process, firstly, the various raw materials are uniformly mixed according to the above-mentioned ratio, and then press-formed, and then the press-formed block and the above-mentioned tile back 1 are put into a sintering mold and assembled together. Then put it into a pressure sintering furnace to complete the sintering process, and the sintering temperature is 1030°C. During the sintering process, the friction material block 5 and the tile back 1 are sintere...

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Abstract

The invention relates to a powder metallurgical brake shoe for a railway locomotive. The brake shoe comprises a brake shoe back and a frictional material block, wherein the brake shoe back comprises a brake shoe nose and a positioning groove; the frictional material block is manufactured by a powder metallurgical process; and the frictional material block and the brake shoe back are directly sintered together at the pressure sintering stage of the powder metallurgical process. The brake shoe is characterized in that: the frictional material block consists of the following components in percentage by weight: 12 to 14 percent of graphite, 3 to 5 percent of copper, 1 to 3 percent of manganese, 1 to 3 percent of chromium, 1 to 3 percent of nickel, 1 to 2 percent of aluminum, 2 to 5 percent of molybdenum disulfide, 2 to 5 percent of mullite, 2 to 4 percent of molybdenum trioxide and the balance of iron. The brake shoe has the advantages of simple structure, short manufacturing process flow and low manufacturing cost. The powder metallurgical brake shoe has a stable friction coefficient, little abrasion and long service life.

Description

technical field [0001] The invention relates to a powder metallurgy brake shoe for a railway locomotive, belonging to the field of powder metallurgy friction materials. Background technique [0002] Friction material is one of the indispensable materials in brakes, clutches and friction transmissions of various mechanical equipment. It is a multi-component composite material that uses friction to convert the kinetic energy of moving objects into heat energy, thereby slowing down or stopping the object. Since the invention of the vehicle, research on friction materials has begun. In the past 20 years, with the vigorous development of the transportation industry, the development of friction materials has been particularly rapid. Many new friction materials have emerged and are widely used in various construction machinery and transportation tools. The trend of scientific and technological development in the 21st century is high speed, environmental protection and energy savin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02F16D69/04
Inventor 吴佩芳
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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