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Manufacturing method of balance suspension part for spheroidal graphite cast iron automobile

A technology of nodular cast iron and a manufacturing method, which is applied in the directions of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of high price, increased cost, and few materials, etc.

Inactive Publication Date: 2018-09-28
杨俊成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an important part of the car, the balance suspension requires materials with excellent mechanical properties and surface properties, but at present, there are few materials that can meet the above performance requirements, and the price is relatively expensive, resulting in increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for manufacturing a balance suspension of a nodular cast iron automobile, which adopts inoculation spheroidization, iron mold sand-coated casting technology, followed by surface carburizing treatment; heat treatment steps are prepared, and the composition of the matrix material of the balance suspension for automobiles (mass percentage ):

[0023] C 4.1%, Si 2.9%, Mn 0.25%, S 0.016%, P 0.013%, Cu 0.37%, Nb 0.12%, Cr 0.25%, Sb 0.1%, Mg 0.014%, Ti 0.036%, La 0.053% , Sn0.074%, W 0.04%, Co 0.04%, the balance is Fe,

[0024] Dosing according to the composition of the elements and adding to the melting furnace, after the molten liquid is formed, the molten liquid is treated with the nodulizing agent by the injection method, the molten liquid is controlled at 1460°C, the holding time of the spheroidizing is 10-15 minutes, and the spheroidizing The addition amount of the nodulizer is 1-3% of the total amount of the melt, the particle size of the nodulizer is 0.5-1mm,...

Embodiment 2

[0029] A method for manufacturing a balance suspension of a nodular cast iron automobile, which adopts inoculation spheroidization, iron mold sand-coated casting technology, followed by surface carburizing treatment; heat treatment steps are prepared, and the composition of the matrix material of the balance suspension for automobiles (mass percentage ):

[0030] C 4.2%, Si 3.0%, Mn 0.23%, S 0.01%, P 0.02%, Cu 0.37%, Nb 0.13%, Cr 0.17%, Sb 0.15%, Mg 0.02%, Ti 0.038%, La 0.05% , Sn0.06%, W 0.044%, Co 0.058%, the balance is Fe,

[0031] Dosing according to the composition of the elements and adding to the melting furnace, after the molten liquid is formed, the molten liquid is treated with a nodulizing agent by using the nodulizing agent flushing method. The addition amount of the nodulizer is 1-3% of the total amount of the melt, the particle size of the nodulizer is 0.5-1mm, and the composition of the nodulizer is: Mg21%, Si5%, Nb 2%, La 0.3%, and the balance is Fe , then lo...

Embodiment 3

[0036] A method for manufacturing a balance suspension of a nodular cast iron automobile, which adopts inoculation spheroidization, iron mold sand-coated casting technology, followed by surface carburizing treatment; heat treatment steps are prepared, and the composition of the matrix material of the balance suspension for automobiles (mass percentage ):

[0037] C 4.1%, Si 3.1%, Mn 0.28%, S 0.01%, P 0.01%, Cu 0.3%, Nb 0.15%, Cr 0.28%, Sb 0.1%, Mg 0.01%, Ti 0.03%, La 0.06% , Sn0.06%, W 0.04%, Co 0.05%, the balance is Fe,

[0038]Dosing according to the composition of the elements and adding to the melting furnace, after the molten liquid is formed, the molten liquid is treated with the nodulizing agent by the injection method, the molten liquid is controlled at 1460°C, the holding time of the spheroidizing is 10-15 minutes, and the spheroidizing The addition amount of the nodulizer is 1-3% of the total amount of the melt, the particle size of the nodulizer is 0.5-1mm, and the...

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Abstract

The invention discloses a manufacturing method of balance suspension part for spheroidal graphite cast iron automobile. The balance suspension part base material for the automobile comprises the following composition of, by mass, 4.2% of C, 2.9% of Si, 0.21% of Mn, 0.01% of S, 0.01% of P, 0.4% of Cu, 0.15% of Nb, 0.29 % of Cr, 0.15 % of Sb, 0.01% of Mg, 0.05% of Ti, 0.05% of La, 0.08% of Sn, 0.04%of W, 0.06% of Co and the balance Fe. According to the method, the steps of quenching, low-temperature tempering, subzero treatment and high-temperature tempering are adopted in the spheroidal graphite cast iron, so that all alloying elements can be fully dissolved into a carbon matrix, and a pearlitic structure proportion of the final prepared balance suspension part is relatively high; a carburizing treatment has good bending strength, excellent comprehensive mechanical performance, wear resistance and high strength; the surface of the spheroidal graphite cast iron is subjected to laser remelting treatment, so that the hardness and the corrosion resistance of a material are effectively improved, the service life of the balance suspension part is prolonged, and the cost is reduced.

Description

technical field [0001] The invention relates to a method for manufacturing a balance suspension part for a nodular cast iron automobile, belonging to the technical field of nodular cast iron. Background technique [0002] The economic development of a country is inseparable from the development of industrial technology. In recent years, my country's automobile production technology has developed by leaps and bounds, and the performance requirements of metal materials used in various parts are getting higher and higher. Especially for automotive chassis parts, the metal materials used are required to have special properties such as high strength, high hardness, and corrosion resistance. As an important part of the automobile, the balance suspension requires materials with excellent mechanical properties and surface properties, but at present, there are few materials that can meet the above performance requirements, and the price is relatively expensive, resulting in increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/04C22C37/06C22C37/10C22C33/12C21C1/10B22C9/22C21D5/00
Inventor 杨俊成
Owner 杨俊成
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