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Low pressure casting process for aluminum alloy cylinder part

A technology of low-pressure casting and preparation process, which is applied in the field of low-pressure casting preparation process of aluminum alloy cylinder parts, which can solve the problems of low yield rate, low material utilization rate, poor structure and performance of large cylinders, etc., and achieve high material utilization rate, The effect of less machining allowance and good structure compactness

Inactive Publication Date: 2012-12-26
王宏波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of poor structure and performance, low material utilization rate and low yield rate of large cylinders produced by gravity casting and sand casting processes, and to provide a compact structure, excellent mechanical properties, high material utilization rate, and high yield rate. , Aluminum alloy cylinder parts with low manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A low-pressure casting preparation process of an aluminum alloy cylinder part is as follows:

[0015] a. Prepare aluminum alloy, its material composition mass percentage ratio is: Si: 6.0%, Mg: 0.3%, Ti: 0.1%, Fe: 0.05%, the total amount of impurity elements such as Cu, Mn, Zn, Sn, Pb is not More than 0.5%, the rest is Al;

[0016] b. Heat the prepared aluminum alloy in a melting furnace to melt it. After the alloy is completely melted, adjust the temperature of the molten aluminum to 730°C, and use aluminum titanium boron refiner for refinement treatment. The amount of refiner added is 0.1% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 720°C, and use an aluminum strontium modifier for modification treatment, the amount of the modifier added is 0.3% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 710°C, refining agent, the amount of refining agent added is 0.5% of the total mass of the ...

Embodiment 2

[0021] A low-pressure casting preparation process of an aluminum alloy cylinder part is as follows:

[0022] a. Prepare aluminum alloy, its material composition mass percentage ratio is: Si: 6.5%, Mg: 0.4%, Ti: 0.15%, Fe: 0.1%, the total amount of impurity elements such as Cu, Mn, Zn, Sn, Pb is not More than 0.5%, the rest is Al;

[0023] b. Heat the prepared aluminum alloy in a melting furnace to melt it. After the alloy is completely melted, adjust the temperature of the molten aluminum to 740°C, and use aluminum titanium boron refiner for refinement treatment. The amount of refiner added is 0.15% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 730°C, and use an aluminum strontium modifier for modification treatment, and the amount of the modifier added is 0.4% of the total mass of the smelted alloy; refining agent, the amount of refining agent added is 0.55% of the total mass of the smelted alloy; finally, slag is skimmed, and the a...

Embodiment 3

[0028] A low-pressure casting preparation process of an aluminum alloy cylinder part is as follows:

[0029] a. Prepare aluminum alloy, its material composition mass percentage ratio is: Si: 7.0%, Mg: 0.5%, Ti: 0.2%, Fe: 0.15%, the total amount of impurity elements such as Cu, Mn, Zn, Sn, Pb is not More than 0.5%, the rest is Al;

[0030] b. Heat the prepared aluminum alloy in a melting furnace to melt it. After the alloy is completely melted, adjust the temperature of the molten aluminum to 750°C, and use aluminum titanium boron refiner for refinement treatment. The amount of refiner added is 0.2% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 740°C, and use an aluminum strontium modifier for modification treatment, the amount of the modifier added is 0.5% of the total mass of the smelted alloy; adjust the temperature of the molten aluminum to 730°C, refining agent, the amount of refining agent added is 0.6% of the total mass of the ...

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Abstract

The invention discloses a low pressure casting process for an aluminum alloy cylinder part. The aluminum alloy used by the method comprises the following materials in percentage by mass: 6.0 to 7.0 percent of Si, 0.3 to 0.5 percent of Mg, 0.1 to 0.2 percent of Ti, 0.05 to 0.15 percent of Fe and the balance of Al. After melting, thining, modification, and refining, the materials are subjected to low pressure casting and pouring; and after low pressure casting process of liquid lifting, filling, pressure maintaining and pressure releasing, the materials form a cast in a die cavity; and after a cast blank is subjected to solution treatment, and heat treatment of incomplete artificial aging, the cast has the advantages that: the texture is compact, casting defects such as pores, shrinkage porosity, shrinkage cavity, slag inclusion, and the like are avoided, the quality of the cast is improved; meanwhile, the working allowance of the cast is less, so the material utilization is improved and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of parts prepared by a low-pressure casting process, in particular to a low-pressure casting preparation process of an aluminum alloy cylinder part. Background technique [0002] Low-pressure casting is a special casting method in which liquid metal fills the mold mold through the riser tube under the action of low gas pressure, and solidifies and crystallizes under a certain pressure. [0003] Using low-pressure casting technology, the liquid aluminum filling is stable, the speed is easy to control, the liquid flow direction is consistent with the airflow direction in the mold, and the exhaust is smooth. The aluminum alloy solidifies and crystallizes under pressure during the low-pressure casting process, with compact structure and excellent mechanical properties. A casting with a dense internal structure. [0004] The large aluminum alloy cylinder also bears high gas pressure in actual work, which require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04C22C21/02C22C1/03C22C1/06C22F1/043
Inventor 王宏波
Owner 王宏波
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