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Casting method of automobile engine cover

A technology of automobile engine and engine cover, which is applied in the direction of improvement of process efficiency, coating, metal material coating process, etc., can solve the problems of low resistance to twisting fatigue strength, low strength and hardness, etc., and achieve good internal structure compactness, Good oxidation resistance, avoiding the effect of high hardness and brittleness

Inactive Publication Date: 2017-02-22
马鞍山顺发机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cast automobile engine cover is not high in strength and hardness, and its resistance to twisting fatigue is not high, which cannot meet the needs of some occasions in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for casting an automobile engine cover includes the following steps:

[0016] ① Put a certain amount of scrap steel into the intermediate frequency electric furnace to melt into molten steel. When the temperature in the intermediate frequency electric furnace rises to 1000-1150°C, put in the steel ingots, pig iron and reclaimed materials, and then discharge the slag. After the slag discharge, add ferromanganese and ferrosilicon alloy When the temperature in the intermediate frequency electric furnace rises to 1480℃, the iron is tapped. At this time, a certain amount of copper and ferromolybdenum are poured with the molten iron. Ultrasonic treatment is used for 4 minutes at the 8th minute of pouring, and the engine cover is taken out after 15 minutes of pouring. Castings and engine cover castings should meet the following requirements by weight percentages: carbon 2.11%, manganese 0.10%, aluminum 0.4%, silicon 0.62%, titanium 0.01%, nickel 0.35%, chromium 0.26%, cop...

Embodiment 2

[0025] A method for casting an automobile engine cover includes the following steps:

[0026] ① Put a certain amount of scrap steel into the intermediate frequency electric furnace to melt into molten steel. When the temperature in the intermediate frequency electric furnace rises to 1000-1150°C, put in the steel ingots, pig iron and reclaimed materials, and then discharge the slag. After the slag discharge, add ferromanganese and ferrosilicon alloy When the temperature in the intermediate frequency electric furnace rises to 1480℃, the iron is tapped. At this time, a certain amount of copper and ferromolybdenum are poured with the molten iron. Ultrasonic treatment is used for 4 minutes at the 8th minute of pouring, and the engine cover is taken out after 15 minutes of pouring. Castings and engine cover castings should meet the following requirements by weight percentage of chemical components: carbon 2.35%, manganese 0.12%, aluminum 0.6%, silicon 0.75%, titanium 0.03%, nickel 0.38...

Embodiment 3

[0035] A method for casting an automobile engine cover includes the following steps:

[0036] ① Put a certain amount of scrap steel into the intermediate frequency electric furnace to melt into molten steel. When the temperature in the intermediate frequency electric furnace rises to 1000-1150°C, put in the steel ingots, pig iron and reclaimed materials, and then discharge the slag. After the slag discharge, add ferromanganese and ferrosilicon alloy When the temperature in the intermediate frequency electric furnace rises to 1480℃, the iron is tapped. At this time, a certain amount of copper and ferromolybdenum are poured with the molten iron. Ultrasonic treatment is used for 4 minutes at the 8th minute of pouring, and the engine cover is taken out after 15 minutes of pouring. Castings and engine cover castings should meet the following requirements by weight percentage of chemical components: carbon 2.25%, manganese 0.11%, aluminum 0.5%, silicon 0.68%, titanium 0.02%, nickel 0.36...

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PUM

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Abstract

The invention discloses a casting method of an automobile engine cover. The casting method comprises the following components: (1) pouring molten iron; (2) thermally treating; (3) mechanically processing; and (4) inspecting and then warehousing. According to the casting method of the automobile engine cover, copper and ferromolybdenum are poured together with molten iron, and ultrasonic treatment is carried out, so that the strength, hardness and impact toughness can be obviously improved; the fatigue strength and high temperature resistance are improved; the section performance is improved; the abrasion resistance is improved.

Description

Technical field [0001] The invention relates to the field of automobile castings, in particular to a method for casting an automobile engine cover. Background technique [0002] Casting is one of the main methods for producing parts blanks. It is a very quick preparation method. Especially for parts of some brittle metals or alloy materials, casting technology is a common processing method. Its forming principle is: heating and melting the metal to make it It has fluidity and is then poured into a mold cavity with a certain shape, fills the cavity under the action of gravity or external force, cools and solidifies into a casting or part. At present, the strength and hardness of cast automobile engine covers are not high, and the fatigue strength against torsion is not high, which cannot meet the needs of certain occasions in the market. Summary of the invention [0003] The purpose of the present invention is to provide a method for casting an automobile engine cover, which is ac...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08C22C33/08B22D27/08C21D1/18C23C8/46
CPCB22D27/08C21D1/18C22C33/08C22C37/08C22C37/10C23C8/46Y02P10/20
Inventor 郭传发
Owner 马鞍山顺发机械制造有限公司
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