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High thermal fatigue resistant commercial vehicle brake disc material and preparation method thereof

A technology for brake discs and commercial vehicles, which is applied in the automotive field and can solve problems such as low service life

Pending Publication Date: 2022-08-05
CHINA FIRST AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a material and a preparation method of a commercial vehicle brake disc resistant to high thermal fatigue, which can improve the effect of the thermal fatigue resistance life of the brake disc, and solve the problem of using the brake disc of the existing disc brake under high thermal load The problem of low lifespan

Method used

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  • High thermal fatigue resistant commercial vehicle brake disc material and preparation method thereof
  • High thermal fatigue resistant commercial vehicle brake disc material and preparation method thereof
  • High thermal fatigue resistant commercial vehicle brake disc material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 61% scrap steel, 33% return charge, 0.25% molybdenum ferroalloy, 1.4% silicon carbide, 1.7% recarburizer, 0.24% copper, 0.10% ferromanganese, 0.17% ferrochromium, and 0.15% iron sulphur.

[0042] A preparation method of a material for a commercial vehicle brake disc resistant to high thermal fatigue, comprising the following steps:

[0043] Step 1, ingredients;

[0044] Weigh the following raw material ratios by weight: 61% scrap steel, 33% return charge, 0.25% ferromolybdenum alloy, 1.4% silicon carbide, 1.7% recarburizer, 0.24% copper, 0.10% ferromanganese, 0.17% ferrochromium, ferrous sulfide 0.15% of raw materials.

[0045] Step 2, feeding and melting;

[0046] The specific method of feeding and melting is as follows:

[0047] 21) Add 20% scrap steel to the intermediate frequency furnace for smelting;

[0048] 22) Add 1.7% of recarburizer, 1.4% of silicon carbide, 0.10% of ferromanganese and 0.17% of ferrochrome to the intermediate frequency furnace for sme...

Embodiment 2

[0067] Take 78% scrap steel, 17% return charge, 0.7% molybdenum ferroalloy, 2.0% silicon carbide, 2.5% recarburizer, 0.5% copper, 0.25% ferromanganese, 0.45% ferrochromium, and 0.20% iron sulphur.

[0068] A preparation method of a material for a commercial vehicle brake disc resistant to high thermal fatigue, comprising the following steps:

[0069] Step 1, ingredients;

[0070] Weigh the following raw material proportions according to weight: 78% scrap steel, 17% return charge, 0.7% ferromolybdenum alloy, 2.0% silicon carbide, 2.5% recarburizer, 0.5% copper, 0.25% ferromanganese, 0.45% ferrochromium, ferrosulfide 0.20%.

[0071] Step 2, feeding and melting;

[0072] The specific method of feeding and melting is as follows:

[0073] 21) Add 20% scrap steel to the intermediate frequency furnace for smelting;

[0074] 22) Add 2.5% recarburizer, 2.0% silicon carbide, 0.25% ferromanganese and 0.45% ferrochromium to the intermediate frequency furnace for smelting;

[0075] 23...

Embodiment 3

[0093] Take 70% scrap steel, 25% return charge, 0.6% ferromolybdenum alloy, 1.7% silicon carbide, 2.2% recarburizer, 0.4% copper, 0.15% ferromanganese, 0.3% ferrochromium, and 0.18% ferrosulfide.

[0094] A preparation method of a material for a commercial vehicle brake disc resistant to high thermal fatigue, comprising the following steps:

[0095] Step 1, ingredients;

[0096] Weigh the following raw material ratios by weight: 70% scrap steel, 25% return charge, 0.6% ferromolybdenum alloy, 1.7% silicon carbide, 2.2% recarburizer, 0.4% copper, 0.15% ferromanganese, 0.3% ferrochromium, ferrosulfide 0.18%.

[0097] Step 2, feeding and melting;

[0098] The specific method of feeding and melting is as follows:

[0099] 21) Add 20% scrap steel to the intermediate frequency furnace for smelting;

[0100] 22) Add 2.2% of recarburizer, 1.7% of silicon carbide, 0.15% of ferromanganese and 0.3% of ferrochromium into the intermediate frequency furnace for smelting;

[0101] 23) Ad...

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Abstract

The invention relates to the technical field of automobiles, in particular to a high-thermal-fatigue-resistant commercial vehicle brake disc material and a preparation method thereof. The invention discloses a commercial vehicle brake disc material resistant to high thermal fatigue. The material is prepared from, by weight, 61%-78% of waste steel, 17%-33% of foundry returns, 0.25%-0.7% of ferromolybdenum alloy, 1.4%-2.0% of silicon carbide, 1.7%-2.5% of carburant, 0.24%-0.5% of copper, 0.10%-0.25% of ferromanganese, 0.17%-0.45% of ferrochromium and 0.15%-0.2% of ferrous sulfide. The preparation method of the commercial vehicle brake disc material resistant to high thermal fatigue comprises the following steps: step 1, preparing materials; 2, feeding and melting; thirdly, molten iron components are smelted; 4, discharging and inoculation treatment; and fifthly, pouring is conducted. The effect of prolonging the thermal fatigue resisting life of the brake disc can be achieved, and the problem that the service life of a brake disc of an existing disc brake is short under the high heat load is solved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a material and a preparation method of a commercial vehicle brake disc resistant to high thermal fatigue. Background technique [0002] The application of brake discs on medium and heavy duty trucks has been paid more and more attention by the country. It has good braking stability. After a lot of test data in the industry, it has been found that disc brakes are compared with drum brakes and disc brakes on heavy trucks and trailers. The braking distance of the drum brake is about 30% shorter than that of the drum brake. The National Ministry of Communications regulations GB 7258 clearly require that from September 1, 2019, the maximum speed is greater than 90Km / h, and the tonnage is greater than 12 tons. Tractors should be disc brakes. However, the service life of the brake disc of the disc brake is relatively low under high thermal load. At present, the industry usually ado...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C37/06C22C37/10
CPCC22C33/08C22C37/10C22C37/06Y02P10/20
Inventor 马俊杰孙继华尹庆华张显宜黄健明杜利峰王瑞冬
Owner CHINA FIRST AUTOMOBILE
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