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Nodular cast iron for automobile braking disc and preparation method thereof

A nodular cast iron and automobile braking technology, which is applied in the field of nodular cast iron, can solve the problems that the performance requirements of nodular cast iron for automobile brake discs cannot be fully met, and the performance of cast iron is low.

Inactive Publication Date: 2018-08-24
HANSHAN COUNTY XINGDA DUCTILE IRON FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this invention, the various performances of cast iron are relatively low, and the performance requirements of nodular cast iron for automobile brake discs cannot be fully met.

Method used

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  • Nodular cast iron for automobile braking disc and preparation method thereof
  • Nodular cast iron for automobile braking disc and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of nodular cast iron for automobile brake disc, the mass percent of each element composition in the nodular cast iron is: C: 3.4%, Si: 2.9%, Cr: 0.4%, Mn: 0.3%, Al: 0.2%, Ni: 0.6%, Mg: 0.4%, Cu: 0.5%, Mo: 0.3%, Ta: 0.08%, Y: 0.05%, Sb: 0.02%, S≤0.02%, P≤0.04%, the balance is Fe and unavoidable of impurities.

[0023] A method for preparing nodular cast iron for automobile brake discs, comprising the following steps:

[0024] a. Add pig iron, steel scrap and recycled materials into the intermediate frequency induction furnace according to the predetermined formula and smelt them at a temperature of 1500°C. After smelting, detect the content of each element in the molten iron and adjust the content of each element until it meets the formula requirements. When the amount of molten iron in the ladle reaches the required weight, the iron is tapped for spheroidizing inoculation treatment;

[0025] b. Pour the molten iron into the molten iron ladle, add a nodulizer eq...

Embodiment 2

[0032]A kind of nodular cast iron for automobile brake disc, the mass percent of each element composition in the nodular cast iron is: C: 3.5%, Si: 3.2%, Cr: 0.8%, Mn: 0.2%, Al: 0.4%, Ni: 0.4%, Mg: 0.2%, Cu: 0.6%, Mo: 0.4%, Ta: 0.10%, Y: 0.04%, Sb: 0.03%, S≤0.02%, P≤0.04%, the balance is Fe and unavoidable of impurities.

[0033] A method for preparing nodular cast iron for automobile brake discs, comprising the following steps:

[0034] a. Add pig iron, steel scrap, and returned materials to the intermediate frequency induction furnace according to the predetermined formula for smelting at a temperature of 1520°C. After smelting, detect the content of each element in the molten iron, and adjust the content of each element until it meets the formula requirements. When the amount of molten iron in the ladle reaches the required weight, the iron is tapped for spheroidizing inoculation treatment;

[0035] b. Pour the molten iron into the molten iron ladle, add a nodulizer equiv...

Embodiment 3

[0042] A kind of nodular cast iron for automobile brake disc, the mass percent of each element composition in the nodular cast iron is: C: 3.2%, Si: 2.7%, Cr: 0.6%, Mn: 0.6%, Al: 0.8%, Ni: 0.2%, Mg: 0.8%, Cu: 0.2%, Mo: 0.4%, Ta: 0.09%, Y: 0.05%, Sb: 0.025%, S≤0.02%, P≤0.04%, the balance is Fe and unavoidable of impurities.

[0043] A method for preparing nodular cast iron for automobile brake discs, comprising the following steps:

[0044] a. Add pig iron, steel scrap, and returned materials to the intermediate frequency induction furnace according to the predetermined formula for smelting at a temperature of 1530°C. After smelting, detect the content of each element in the molten iron, and adjust the content of each element until it meets the formula requirements. When the amount of molten iron in the ladle reaches the required weight, the iron is tapped for spheroidizing inoculation treatment;

[0045] b. Pour the molten iron into the molten iron ladle, add a nodulizer equ...

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Abstract

The invention relates to the technical field of nodular cast iron, and particularly relates to nodular cast iron for an automobile braking disc and a preparation method thereof. The nodular cast ironis prepared from the following elements according to mass percent: 3.2 to 3.6% of C, 2.8 to 3.2% of Si, 0.4 to 0.8% of Cr, 0.2 to 0.6% of Mn, 0.2 to 0.8% of Al, 0.2 to 0.8% of Ni, 0.2 to 0.8% of Mg, 0.2 to 0.6% of Cu, 0.2 to 0.4% of Mo, 0.08 to 0.10% of Ta, 0.04 to 0.06% of Y, 0.02 to 0.03% of Sb, less than or equal to 0.02% of S, less than or equal to 0.04% of P and the balance of Fe and inevitable impurities. The invention provides the nodular cast iron for the automobile braking disc and the preparation method thereof. The elements and the content are reasonably optimized, so that the prepared nodular cast iron has the advantages of high strength, high toughness and wear resistance and high high-temperature resistance, and the service life of the automobile braking disc is prolonged during use.

Description

technical field [0001] The invention relates to the technical field of nodular cast iron, in particular to a nodular cast iron for automobile brake discs and a preparation method thereof. Background technique [0002] The birth of the automobile has a history of one hundred years, and it has developed rapidly. At present, it has become the most important means of transportation in the world, an important driving force for economic growth, and an indispensable part of people's life. Casting is one of the important components of auto parts, and the application of casting products in auto parts occupies an important position. The main characteristics of automotive castings are complex shapes, thin wall thickness, high dimensional accuracy, large production batches, and very high reliability requirements. To reduce the weight of the car as low as possible, the castings are required to be both light and high strength. In the past, many auto parts were made of gray cast iron, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/04C22C37/06C22C37/10C22C33/08C21C1/10
CPCC21C1/10C22C33/08C22C37/04C22C37/06C22C37/10Y02P10/20
Inventor 张福新
Owner HANSHAN COUNTY XINGDA DUCTILE IRON FACTORY
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