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Magnesium alloy casting process for automobile engine

A technology of automobile engine and casting process, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of high casting process level requirements, low casting process efficiency, and prone to defects, etc., to achieve uniform structure density, The effect of lowering the temperature and making the production process easier

Inactive Publication Date: 2017-12-22
宁国市润丰金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Automobile engine cylinder is a part with high technical content in automobiles. With the development of modern automobile safety and energy saving, the new magnesium alloy cylinder has become the best choice for automobile engine cylinder. Due to the structure of automobile engine cylinder It is more complicated, the thickness of the cylinder is different, and the casting process level is high. The existing casting process has low efficiency and is prone to defects. Therefore, further research and improvement of the process is required.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A magnesium alloy casting process for automobile engines includes the following steps:

[0017] (1) Add 2% of the polyether modified epoxy resin and 0.4% of the curing agent to the molding sand, and form a resin sand mold after molding and closing the box;

[0018] (2) The chemical composition percentage content of the raw materials of the casting liquid is as follows: zinc 0.3wt%, zirconium 0.85wt%, calcium 1.4wt%, cesium 1.5wt%, nickel 0.12wt%, lanthanum 0.75wt%, praseodymium 0.05wt%, aluminum 0.2wt%, copper 0.04wt%, the balance is magnesium;

[0019] (3) The pouring temperature during pouring is 740°C, the resin sand mold is preheated to 55°C, and the obtained pouring liquid is poured to fill the mold cavity under the condition of a pressure of 0.07MPa, then pressurize to 0.13MPa, and maintain the pressure 3 minutes;

[0020] (4) After the pressure holding is completed, cool down to 360°C, keep it for 20 minutes, then continue to cool to 240°C, keep it for 8 minutes, and co...

Embodiment 2

[0025] A magnesium alloy casting process for automobile engines includes the following steps:

[0026] (1) Add 1.2% of the polyether modified epoxy resin and 0.6% of the curing agent to the molding sand, and form a resin sand mold after molding and closing the box;

[0027] (2) The chemical composition percentage content of the raw materials of the casting liquid is as follows: zinc 0.26wt%, zirconium 0.95wt%, calcium 1.2wt%, cesium 1.4wt%, nickel 0.08wt%, lanthanum 0.65wt%, praseodymium 0.02wt%, aluminum 0.25wt%, copper 0.06wt%, the balance is magnesium;

[0028] (3) The pouring temperature during pouring is 720°C, the resin sand mold is preheated to 60°C, and the obtained pouring liquid is poured to fill the mold cavity under the condition of a pressure of 0.06MPa, then pressurize to 0.14MPa, and maintain the pressure 4 minutes;

[0029] (4) After the pressure holding is completed, cool down to 360°C, keep it for 15 minutes, then continue to cool to 240°C, keep it for 10 minutes, a...

Embodiment 3

[0034] A magnesium alloy casting process for automobile engines includes the following steps:

[0035] (1) Add 2.8% of the weight of polyether modified epoxy resin and 0.2% of the curing agent to the molding sand, and form a resin sand mold after matching the mold and the box;

[0036] (2) The chemical composition percentage content of the raw materials of the casting liquid is as follows: zinc 0.35wt%, zirconium 0.75wt%, calcium 1.5wt%, cesium 1.6wt%, nickel 0.15wt%, lanthanum 0.85wt%, praseodymium 0.08wt%, aluminum 0.15wt%, copper 0.02wt%, the balance is magnesium;

[0037] (3) The pouring temperature during pouring is 760°C, the resin sand mold is preheated to 50°C, and the obtained pouring liquid is poured to fill the mold cavity under the condition of a pressure of 0.08MPa, then pressurize to 0.12MPa, and maintain the pressure 2 minutes;

[0038] (4) After the pressure holding is completed, cool down to 360°C, keep it for 25 minutes, then continue to cool to 240°C, keep it for 5...

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Abstract

The invention belongs to the technical field of cylinders of automobile engines, and particularly relates to a magnesium alloy casting process for an automobile engine. The magnesium alloy casting process for the automobile engine comprises preparation of a resinous sand mold, preparation of pouring liquid and pouring process. Compared with the prior art, the magnesium alloy casting process for the automobile engine has the advantages that the defective percentage of a magnesium alloy casting of the automobile engine is reduced by change of raw materials of molding sand, a pouring stage and a cooling stage are controlled reasonably, therefore, various properties of an obtained product reach corresponding standards, a production process is easily controlled, the structure density of the product is uniform, the casting temperature is lower than the casting temperature under common pressure, energy consumption is reduced, the automobile engine can work at high temperature continuously, meanwhile, by continuous effects of reciprocating motion of a piston, the automobile engine has the characteristics of high temperature resistance and abrasion resistance, and the service life of the product is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of automobile engine cylinder blocks, and specifically relates to an automobile engine magnesium alloy casting process. Background technique [0002] Automobile engine block is a part with high technical requirements in automobiles. With the development of modern automobile safety and energy saving, the new type of magnesium alloy cylinder block has become the best choice for automobile engine block. Due to the structure of automobile engine block It is more complicated, the thickness of the cylinder body is different, and the requirements for the casting process level are high. The existing casting process has low efficiency and is prone to defects. Therefore, further research and improvement of its process are needed. Summary of the invention [0003] The purpose of the present invention is to provide a magnesium alloy casting process for automobile engines in view of the existing problems. [0004] The present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04C22C23/00B22C1/00
CPCB22D18/04B22C1/00C22C23/00
Inventor 文有余
Owner 宁国市润丰金属制品有限公司
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