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Ductile iron for producing automobile bracket and preparation method of ductile iron

A technology of automobile brackets and ductile cast iron, which is applied in the field of casting, and can solve problems such as limited high temperature resistance, deformation of ductile iron castings, and increased costs

Inactive Publication Date: 2018-07-31
TAIHU AIJIE MACHINE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ductile cast iron has rapidly developed into a cast iron material that is second only to gray cast iron and is widely used. In the field of machinery manufacturing, cast iron alloys are used to prepare parts with high wear resistance or components with complex structures. Cast iron alloys can be used in casting processes. Reduce the difficulty of processing and reduce production costs, but one defect of cast iron alloys is that during use, the high temperature resistance is limited. When the temperature is high, the cast iron alloy will soften, resulting in deformation of ductile iron castings
Therefore, the automobile bracket produced by ductile iron must be replaced after a period of use, which leads to an increase in cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The nodular cast iron used to produce the automobile bracket of the present invention is composed of the following raw materials in mass percentage: C 1.5%, Si 1.7%, Mn 0.7%, S 0.01%, P 0.057%, Cu 0.1%, Cr 0.12%, Sb 0.006%, Mg 0.04%, Re 0.02%, and the rest is Fe.

[0014] The above-mentioned preparation method for producing the nodular cast iron of automobile support comprises the following steps:

[0015] a Preparation of blast furnace molten iron: take each component according to weight percentage C 1.5%, Si 1.7%, Mn 0.7%, S 0.01%, P0.057%, Cu 0.1%, Cr 0.12%, Sb 0.006%, Mg 0.04%, Re 0.02%, the rest is Fe, which is put into the smelting furnace to melt to obtain the original molten iron;

[0016] b Nodularization treatment: the temperature of the original molten iron is 1500°C, start the nodularization bag, and add 1.1% nodulizer, 0.3% inoculant and Cu 0.1% copper into the nodularization bag by pouring into the nodularization bag. And add the inoculant of 0.4% of for...

Embodiment 2

[0019] The ductile cast iron used to produce the automobile bracket of the present invention is composed of the following raw materials in mass percentage: C 1.8%, Si1.9%, Mn 0.8%, S 0.015%, P 0.06%, Cu 0.18%, Cr 0.22% , Sb 0.007%, Mg 0.06%, Re 0.03%, and the rest is Fe.

[0020] The above-mentioned preparation method for producing the nodular cast iron of automobile support comprises the following steps:

[0021] a Prepare blast furnace molten iron: take each component according to the weight percentage: C 1.8%, Si 1.9%, Mn 0.8%, S 0.015%, P0.06%, Cu 0.18%, Cr 0.22%, Sb 0.007%, Re 0.03%, the rest It is Fe, which is melted in a smelting furnace to obtain the original molten iron;

[0022] b Spheroidizing treatment: The temperature of the original molten iron is 1520°C, start the nodularizing bag, add 1.3% nodulizing agent by weight of the original molten iron, 0.32% inoculant and 0.2% Cu to the nodularizing bag. Copper, and add the inoculant of 0.41% of former molten iron we...

Embodiment 3

[0025] The high-strength and high-toughness ductile iron casting of the present invention is composed of the following raw materials in mass percentage: C 2.1%, Si2.0%, Mn 0.9%, S 0.02%, P 0.0.07%, Cu 0.22%, Cr0.28 %, Sb0.009%, Mg0.08%, Re0.45%, and the rest is Fe.

[0026] The preparation method of the above-mentioned high-strength, high-toughness ductile iron casting comprises the following steps:

[0027] a Prepare blast furnace molten iron: take each component according to weight percentage C 2.1%, Si 2.0%, Mn 0.9%, S 0.02%, P0.0.07%, Cu 0.22%, Cr0.28%, Sb0.009%, Mg0.08 %, Re0.45%, and the rest is Fe, which is melted in a smelting furnace to obtain the original molten iron;

[0028] b Nodularization treatment: the temperature of the original molten iron is 1550°C, start the nodularization bag, and add 1.5% nodulizer, 0.35% inoculant and 0.22% Cu of the original iron liquid into the nodularization bag, And add the inoculant of 0.42% of former molten iron weight with flow ...

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Abstract

The invention discloses ductile iron for producing an automobile bracket, wherein the ductile iron is prepared from the following raw materials in percentage by mass: 1.5 to 2.1% of C, 1.7 to 2.0% ofSi, 0.7% to 0.9% of Mn, 0.01 to 0.02% of S, 0.05 to 0.07% of P, 0.1 to 0.22% of Cu, 0.12 to 0.28% of Cr, 0.006 to 0.009% of Sb, 0.04 to 0.08% of Mg, 0.02 to 0.45% of Re and the balance of Fe. The ductile iron provided by the invention has higher elongation while having higher strength; the casting performance is improved; the efficiency of metal materials is better exerted; the use requirement ofbracket casting of heavy-duty trucks is met. The invention further discloses a preparation method of the ductile iron.

Description

technical field [0001] The invention relates to the technical field of casting, and relates to a spheroidal cast iron and a preparation method thereof, in particular to a spheroidal grinding cast iron for producing automobile brackets and a preparation method thereof. Background technique [0002] Nodular cast iron obtains nodular graphite through spheroidization and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining higher strength than carbon steel. Ductile cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. Parts with high performance requirements. Ductile cast iron has rapidly developed into a cast iron material that is second only to gray cast iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04C22C37/06C22C33/08C21C1/10
CPCC22C37/10C21C1/10C22C33/08C22C37/04C22C37/06
Inventor 陈结
Owner TAIHU AIJIE MACHINE CASTING
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