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High-quality gray cast iron for automobile flywheel housing

A flywheel housing and gray cast iron technology, applied in the field of cast iron, can solve the problems affecting the use value of the flywheel housing, poor vibration frequency characteristics, weak deformation resistance, etc., to achieve good vibration and acoustic characteristics, good processing characteristics, high yield Effect

Active Publication Date: 2018-09-07
安徽伟晔机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The flywheel housing is usually made of cast iron. The characteristics of cast iron materials are closely related to the performance and service life of the flywheel housing. Most of the existing cast iron materials have problems such as low hardness, weak deformation resistance, and poor vibration frequency characteristics, which ultimately affect the Use value of flywheel housing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of high-quality gray cast iron for automobile flywheel housing, the weight percent of its constituent elements is: carbon 3.1%, silicon 1.7%, manganese 0.9%, phosphorus 0.02%, sulfur 0.03%, magnesium 0.03%, strontium 0.02%, vanadium 0.05% %, titanium 0.1%, copper 0.3%, chromium 0.1%, mixed rare earth 0.2%, and the balance is iron.

[0015] Further, the weight percent content of each constituent element in the mixed rare earth is: 58% lanthanum, 25% cerium, 8% neodymium, 3.1% praseodymium, 5.3% samarium, and 0.6% impurity, and the impurity is composed of iron, zinc , magnesium, silicon, tungsten and molybdenum.

[0016] A method for preparing high-quality gray cast iron for an automobile flywheel housing, comprising the steps of:

[0017] (1) First add iron raw materials into the furnace, heat to 1250°C, after melting, then raise the temperature to 1420°C, add ferrosilicon and ferromanganese, after melting evenly, finally raise the temperature to 1530°C, And add...

Embodiment 2

[0020] A kind of high-quality gray cast iron for automobile flywheel housing, the weight percent of its constituent elements is: carbon 3.3%, silicon 1.8%, manganese 1.0%, phosphorus 0.03%, sulfur 0.05%, magnesium 0.04%, strontium 0.03%, vanadium 0.07% %, titanium 0.15%, copper 0.4%, chromium 0.12%, mixed rare earth 0.25%, and the balance is iron.

[0021] Further, the weight percent content of each constituent element in the mixed rare earth is: 58% lanthanum, 25% cerium, 8% neodymium, 3.1% praseodymium, 5.1% samarium, and 0.8% impurity, and the impurity is composed of iron, zinc , magnesium, silicon, tungsten and molybdenum.

[0022] A method for preparing high-quality gray cast iron for an automobile flywheel housing, comprising the steps of:

[0023] (1) First add iron raw materials into the furnace, heat to 1280°C, after melting, then raise the temperature to 1450°C, add ferrosilicon and ferromanganese, after melting evenly, finally raise the temperature to 1550°C, And ...

Embodiment 3

[0026] A kind of high-quality gray cast iron for automobile flywheel housing, the weight percent of its constituent elements is: carbon 3.5%, silicon 2.0%, manganese 1.2%, phosphorus 0.04%, sulfur 0.06%, magnesium 0.05%, strontium 0.04%, vanadium 0.1% %, titanium 0.2%, copper 0.5%, chromium 0.15%, mixed rare earth 0.3%, and the balance is iron.

[0027] Further, the weight percent content of each constituent element in the mixed rare earth is: 57% lanthanum, 25% cerium, 8% neodymium, 3.1% praseodymium, 5.3% samarium, and 1.6% impurities, and the impurities are composed of iron, zinc , magnesium, silicon, tungsten and molybdenum.

[0028] A method for preparing high-quality gray cast iron for an automobile flywheel housing, comprising the steps of:

[0029] (1) First add iron raw materials into the furnace, heat to 1300°C, after melting, then raise the temperature to 1480°C, add ferrosilicon and ferromanganese, after melting evenly, finally raise the temperature to 1560°C, An...

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Abstract

The invention discloses high-quality gray pig iron for an automobile flywheel shell, and relates to cast iron. The high-quality gray pig iron comprises, by weight percent, 3.1% to 3.5% of carbon, 1.7% to 2.0% of silicon, 0.9% to 1.2% of manganese, 0.02% to 0.04% of phosphorus, 0.03% to 0.06% of sulphur, 0.03% to 0.05% of magnesium, 0.02% to 0.04% of strontium, 0.05% to 0.1% of vanadium, 0.1% to 0.2% of titanium, 0.3% to 0.5% of copper, 0.1% to 0.15% of chromium, 0.2% to 0.3% of mixed rare earth and the balance iron. The prepared high-quality gray pig iron has the higher strength, hardness and corrosion resistance, and is good in machining characteristic; during casting, shrinkage holes are not prone to generating, the obtained yield is high, the manufactured flywheel shell is good in vibration and acoustic characteristics, and the service life is longer.

Description

technical field [0001] The invention relates to a cast iron, in particular to a high-quality gray cast iron for an automobile flywheel housing. Background technique [0002] The flywheel housing is one of the parts of the engine. The engine flywheel housing is located between the engine body and the gearbox. The engine flywheel housing is installed on the outside of the engine flywheel and is fixedly connected with the engine body and the gearbox. The flywheel housing is used for the cover through the flywheel chamber The flywheel plays the role of connecting the body, protection and carrier. [0003] The flywheel housing is usually made of cast iron. The characteristics of cast iron materials are closely related to the performance and service life of the flywheel housing. Most of the existing cast iron materials have problems such as low hardness, weak deformation resistance, and poor vibration frequency characteristics, which ultimately affect the The use value of the fly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08
CPCC22C33/08C22C37/06C22C37/10
Inventor 黄林
Owner 安徽伟晔机械有限公司
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