Iron-based composite friction material of clutches and preparation method thereof

A composite friction material and clutch technology, which is applied in the field of metal-based friction materials, can solve the problems of unfriendly environment, complex composition, and high price, and achieve the effects of good stability, high friction coefficient, and reduced components

Active Publication Date: 2016-11-09
NINGBO HONGXIE CLUTCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems that the existing iron-based friction materials have comp

Method used

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  • Iron-based composite friction material of clutches and preparation method thereof
  • Iron-based composite friction material of clutches and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Ingredients: ingredients according to the following mass percentages: 60% of gray cast iron HT250 powder, 20% of silicon powder, 10% of graphite powder, and 10% of carbon fiber. The powder materials are all 300 mesh, and the carbon fiber length is 1-2 mm.

[0026] (2) Mixing: Put the powder prepared in step (1) into a mixer at 1000 rpm and mix for 1.5 hours, then use a ball mill to mill at 500 rpm for 1 hour, and dry for later use.

[0027] (3) Molding: put the powder mixed in step (2) into a steel mold, and press it at 50 MPa for 1 hour to form a billet. The temperature of the powder during molding is 200°C.

[0028] (4) Sintering: Place the blank pressed in step (3) into a graphite mold, sinter in a sintering furnace for 5 hours and then lower the temperature. Vacuum the sintering furnace and fill it with nitrogen to 3MPa before heating up, and the sintering temperature is 1150°C.

[0029] (5) Heat treatment: when the furnace temperature in step (4) drops to 800...

Embodiment 2

[0032] (1) Ingredients: ingredients according to the following mass percentages: gray cast iron HT250 powder 85%, silicon powder 10%, graphite powder 5%, carbon fiber 0%. The powder materials are all 300 mesh, and the carbon fiber length is 1-2 mm.

[0033] (2) Mixing: Put the powder prepared in step (1) into a mixer at 1500 rpm and mix for 1 hour, then use a ball mill to mill at 300 rpm for 1 hour, and dry for later use.

[0034] (3) Molding: put the powder mixed in step (2) into a steel mold, and press it at 30 MPa for 2 hours to form a billet. The temperature of the powder during molding is 200°C.

[0035] (4) Sintering: Place the blank pressed in step (3) into a graphite mold, sinter in a sintering furnace for 3 hours and then lower the temperature. Vacuum the sintering furnace and fill it with nitrogen to 5MPa before heating up, and the sintering temperature is 1350°C.

[0036] (5) Heat treatment: when the furnace temperature in step (4) drops to 850°C, keep it warm for...

Embodiment 3

[0039] (1) Ingredients: ingredients according to the following mass percentages: gray cast iron HT250 powder 70%, silicon carbide powder 15%, graphite powder 10%, carbon fiber 5%. The powder materials are all 300 mesh, and the carbon fiber length is 1-2 mm.

[0040] (2) Mixing: Put the powder prepared in step (1) into a mixer at 1250 rpm and mix for 1 hour, then use a ball mill to mill at 400 rpm for 1.5 hours, and dry for later use.

[0041] (3) Molding: put the powder mixed in step (2) into a steel mold, and press it at 40 MPa for 1.5 hours to form a billet. The temperature of the powder is 300° C. during molding.

[0042] (4) Sintering: Place the blank pressed in step (3) into a graphite mold, sinter in a sintering furnace for 4 hours and then lower the temperature. Vacuum the sintering furnace and fill it with nitrogen to 4MPa before heating up, and the sintering temperature is 1250°C.

[0043] (5) Heat treatment: when the furnace temperature in step (4) drops to 800°C, ...

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Abstract

The invention relates to an iron-based composite friction material of clutches and a preparation method thereof. Raw materials comprises, in mass percentage, 60-80% of gray pig iron powder or nodular cast iron powder, 10-20% of wear-resisting powder, 5-10% of graphite powder and 0-10% of carbon fibers. The preparation method includes the steps of uniformly mixing, ball-milling and drying the raw materials and obtaining powder; and then carrying out mould pressing, sintering and heat treating on the powder, finally carrying out machining and obtaining the iron-based composite friction material of the clutches. According to the iron-based composite friction material of the clutches and the preparation method thereof, the problems that components and technological processes of existing iron-based friction materials are complex, cost is high and partial components pollute environment are solved, and the manufactured iron-based composite friction material has the advantages that the friction coefficient is large, the stability is good, abrasion is small and the service life is long.

Description

technical field [0001] The invention belongs to the field of metal-based friction materials, in particular to an iron-based composite friction material for a clutch and a preparation method thereof. Background technique [0002] Metal-based friction materials have the characteristics of high strength, high and stable friction coefficient, wear resistance, and good thermal conductivity, so they are widely used in the manufacture of clutch friction plates for automobiles, motorcycles, trains, aircraft, oil drilling, and wind power generation. The commonly used clutch friction plate is based on copper, and the friction coefficient and wear rate are controlled by uniformly distributed cemented carbide particles and lubricating particles. However, powder metallurgy friction materials using copper as the matrix not only have expensive raw materials, but also have complex components and processes, resulting in high cost of friction plates. [0003] Based on the consideration of co...

Claims

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Application Information

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IPC IPC(8): C22C47/14C22C49/08C22C33/08C22C101/10
CPCC22C33/006C22C33/08C22C47/14C22C49/08
Inventor 谢剑云胡宏王善南
Owner NINGBO HONGXIE CLUTCH
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