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Spheroidal graphite cast iron alloy

A nodular cast iron and alloy technology, applied in the field of cast iron alloys, can solve the problems of worn brake disc coating, limited high temperature resistance, deformation of brake disc coating, etc., to achieve the effect of expanding the application range and improving high temperature resistance

Inactive Publication Date: 2013-03-20
俞虹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cast iron alloys have a defect that they have limited high temperature resistance during use. Under high temperature conditions, cast iron alloys will soften. Generally, the suitable temperature for cast iron alloys is lower than 350°C.
However, parts of cast iron alloys such as brake discs will locally generate high temperatures of 800-900°C through friction during the braking process. This result not only wears the coating of the brake disc, but also causes the coating of the brake disc to deform. Affects the performance of the brake disc, so the disc must be replaced after a period of use, which leads to increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method is:

[0018] Ingredients, by weight percentage, 3.2% carbon, 2.8% silicon, 0.03% magnesium, 0.01% chromium, 0.005% aluminum, 0.005% boron, 0.6% manganese, 0.08% copper, 0.01% Vanadium, less than 0.1% impurities, and the balance is iron for batching;

[0019] Melting, the above ingredients are smelted at 1250-1280°C into a liquid, after refining such as slag removal, they are incubated at 1180-1200°C for 1.5 hours for inoculation;

[0020] Casting, the solution is cast at a constant temperature and then cooled at a uniform rate to obtain a blank, and the cooling rate is maintained at 0.5-1°C / second to 150-180°C;

[0021] Heat treatment, put the cooled blank into a quenching furnace at 750-780°C for 2 hours, then quench to 300-400°C in a salt bath, and then heat it for 1 hour and then quench to 130-150°C;

[0022] Tempering, keep warm in a tempering furnace at 180-200°C for 3 hours and then cool down to room temperature.

Embodiment 2

[0024] The preparation method is:

[0025] Ingredients, by weight percentage, 3.3% carbon, 3.0% silicon, 0.04% magnesium, 0.025% chromium, 0.01% aluminum, 0.01% boron, 0.8% manganese, 0.12% copper, 0.02% Vanadium, less than 0.1% impurities, and the balance is iron for batching;

[0026] Melting, the above ingredients are smelted at 1250-1280°C into a liquid, after refining such as slag removal, they are incubated at 1180-1200°C for 2 hours;

[0027] Casting, the solution is cast at a constant temperature and then cooled at a uniform rate to obtain a blank, and the cooling rate is maintained at 0.5-1°C / second to 150-180°C;

[0028] Heat treatment, put the cooled blank into a quenching furnace at 750-780°C for 2.5 hours, then quench to 300-400°C in a salt bath, and then heat it for 1 hour and then quench to 130-150°C;

[0029] Tempering, in a tempering furnace at 180-200°C for 2.5 hours, then cool down to room temperature.

Embodiment 3

[0031] The preparation method is:

[0032] Ingredients, by weight percentage, 3.22% carbon, 2.85% silicon, 0.035% magnesium, 0.02% chromium, 0.008% aluminum, 0.008% boron, 0.75% manganese, 0.092% copper, 0.015% Vanadium, less than 0.1% impurities, and the balance is iron for batching;

[0033] Melting, the above ingredients are smelted at 1250-1280°C into a liquid, after refining such as slag removal, they are incubated at 1180-1200°C for 1.5 hours for inoculation;

[0034] Casting, the solution is cast at a constant temperature and then cooled at a uniform rate to obtain a blank, and the cooling rate is maintained at 0.5-1°C / second to 150-180°C;

[0035] Heat treatment, put the cooled blank into a quenching furnace at 750-780°C for 3 hours, then quench to 300-400°C in a salt bath, and then heat it for 1.5 hours and then quench to 130-150°C;

[0036] Tempering, in a tempering furnace at 180-200°C for 3.5 hours, then cool down to room temperature.

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PUM

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Abstract

The invention relates to a spheroidal graphite cast iron alloy which comprises the following components in percent by weight: 3.2-3.3 percent of carbon, 2.8-3.0 percent of silicon, 0.03-0.04 percent of magnesium, 0.01-0.025 percent of chromium, 0.005-0.01 percent of aluminum, 0.005-0.01 percent of boron, 0.6-0.8 percent of manganese, 0.08-0.12 percent of copper, 0.01-0.02 percent of vanadium, less than 0.1 percent of impurities and the balance of iron. According to the spheroidal graphite cast iron alloy, the high-temperature resistance is improved, and the application range is enlarged.

Description

technical field [0001] The invention belongs to the field of cast iron alloys, in particular to a nodular cast iron alloy. Background technique [0002] In the field of automobile or machinery manufacturing, cast iron alloys are used to prepare parts with high wear resistance or parts with complex structures. The use of cast iron alloy and casting process can reduce the difficulty of processing and reduce production costs. However, cast iron alloys have a defect that they have limited high temperature resistance during use. Under high temperature conditions, cast iron alloys will soften. Generally, the suitable temperature of cast iron alloys is lower than 350°C. However, parts of cast iron alloys such as brake discs will locally generate high temperatures of 800-900°C through friction during the braking process. This result not only wears the coating of the brake disc, but also causes the coating of the brake disc to deform. The performance of the brake disc is affected, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10
Inventor 俞虹
Owner 俞虹