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Method for modification of steel fibers of semi-metallic formula brake disc

A steel fiber and semi-metal technology, applied in the field of steel fiber modification in semi-metal brake pads, can solve problems such as adhesive wear, and achieve the effects of improving thermal recession, reducing wear rate and obvious anti-corrosion effect.

Active Publication Date: 2015-01-28
HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the frictional counterparts of steel fiber and gray cast iron are both iron-based materials, and they are prone to adhesion at high temperatures to form adhesive wear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Add water, Na 2 CO 3 Heating and stirring to dissolve, obtaining 200L of Na with a mass fraction of 4% 2 CO 3 solution, then slowly add 50kg of steel fiber into Na 2 CO 3 Stir in the solution to completely immerse the steel fibers in Na 2 CO 3 solution, keep Na 2 CO 3 The temperature of the solution is about 40°C, soak for 15 minutes, take out the steel fiber after removing the grease on the surface of the steel fiber, and drain;

[0027]Step 2: Soak the steel fiber removed from the surface grease in step 1 in 200L piranha solution diluted 90 times with water for 20 minutes. The piranha solution is prepared by diluting concentrated sulfuric acid 100 times and diluting 10 times 30% hydrogen peroxide at a mass ratio of 4:1 , then remove the steel fibers and drain;

[0028] Step 3: Mix silane coupling agent, absolute ethanol, water, NaH 2 PO 4 , sodium tartrate and citric acid are put into the reaction container and mixed to obtain 100kg coupling agent ...

Embodiment 2

[0036] Step 1: Add water, Na 2 CO 3 Heating and stirring to dissolve, obtaining 200L of Na with a mass fraction of 4% 2 CO 3 solution, then slowly add 50kg of steel fiber into Na 2 CO 3 Stir in the solution to completely immerse the steel fibers in Na 2 CO 3 solution, keep Na 2 CO 3 The temperature of the solution is about 40°C, soak for 15 minutes, take out the steel fiber after removing the grease on the surface of the steel fiber, and drain;

[0037] Step 2: Soak the steel fiber removed from the surface grease in step 1 in 200L piranha solution diluted 90 times with water for 20 minutes. The piranha solution is prepared by diluting concentrated sulfuric acid 100 times and diluting 10 times 30% hydrogen peroxide at a mass ratio of 4:1 , then remove the steel fibers and drain;

[0038] Step 3: Mix silane coupling agent, absolute ethanol, water, NaH 2 PO 4 , sodium tartrate and citric acid are put into the reaction container and mixed to obtain 100kg coupling agent...

Embodiment 3

[0045] Step 1: Add water, Na 2 CO 3 Heating and stirring to dissolve, obtaining 200L of Na with a mass fraction of 3% 2 CO 3 solution, then slowly add 50kg of steel fiber into Na 2 CO 3 Stir in the solution to completely immerse the steel fibers in Na 2 CO 3 solution, keep Na 2 CO 3 The temperature of the solution is about 35°C, soak for 10 minutes, take out the steel fiber after removing the grease on the surface of the steel fiber, and drain;

[0046] Step 2: Soak the steel fiber removed from the surface grease in step 1 in 200L piranha solution diluted 80 times with water for 15 minutes. The piranha solution is prepared by diluting concentrated sulfuric acid 100 times and diluting 10 times 30% hydrogen peroxide at a mass ratio of 3:1 , then remove the steel fibers and drain;

[0047] Step 3: Mix silane coupling agent, ethanol, methanol, water, NaH 2 PO 4 , sodium tartrate and citric acid are put into the reaction container and mixed to obtain 100kg coupling agen...

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Abstract

The invention discloses a method for modification of steel fibers of a semi-metallic formula brake disc. The method comprises the following steps of 1, carrying out immersion by a sodium carbonate solution for oil removal, 2, immersing steel fibers in a dilute piranha solution, 3, treating the steel fibers by a coupling agent solution to coat films on the surfaces of the steel fibers, and 4, carrying out heat treatment for film curing, and carrying out scattering to obtain steel fibers coated with uniformly-distributed and suitable-thickness organic films. The method can successfully modify the steel fibers and solves the problem that a metal friction plate has poor heat fading performances and a short service life and produces rust easily. Through use of the modified steel fibers as a metal brake disc raw material, brake disc heat fading performances and a service life are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a method for modifying steel fibers in semi-metallic formula brake pads. Background technique [0002] With the continuous improvement of people's economic income and the rapid development of the automobile industry, more and more cars have entered ordinary families, and the sales of brake pads are also increasing. Customers have higher and higher requirements on the wear resistance and service life of brake pads. Due to its excellent mechanical properties, such as high toughness, high strength, good thermal conductivity and heat resistance, steel fibers are widely used as reinforcing components in semi-metallic formula friction materials. However, there is a disadvantage of semi-metallic brake pads, which is large wear and tear, which will lead to serious dust fall and short service life. In addition, steel fibers are prone to rust in a humid environment, affecting the ap...

Claims

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Application Information

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IPC IPC(8): C23C22/50C23C22/73D06M13/50D06M13/00D06M13/144D06M13/207D06M11/71D06M11/76
CPCC23C22/50C23C22/73C23C2222/20D06M11/71D06M11/76D06M13/00D06M13/144D06M13/207D06M13/50
Inventor 杨阳刘伯威匡湘铭唐兵涂元满
Owner HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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