Aluminum-based composite piston for heavy-duty diesel engine and preparation method thereof

An aluminum-based composite material, heavy-duty diesel technology, applied in engine components, machines/engines, pistons, etc., can solve the problems of long process flow of pistons and high hidden dangers of thermal stress cracking, and improve its high-temperature mechanical properties and high-temperature tensile strength. Low, the effect of hindering the deformation of the alloy matrix

Active Publication Date: 2020-11-20
ANHUI XIANGBANG COMPOSITE MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides an aluminum-based composite material piston whose piston body is made of a uniform aluminum-based composite material by using metal mold gravity casting technology, and the piston can be equipped with an inlay ring and a salt core internal cooling oil passage, which overcomes the current situation. There is a technical defect that the aluminum-based composite material piston has a long process flow, and the local reinforcement causes a high risk of thermal stress cracking at the interface with the piston body

Method used

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  • Aluminum-based composite piston for heavy-duty diesel engine and preparation method thereof
  • Aluminum-based composite piston for heavy-duty diesel engine and preparation method thereof
  • Aluminum-based composite piston for heavy-duty diesel engine and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A piston of aluminum-based composite material for a heavy-duty diesel engine, the piston includes a piston body, and the piston body is made of an aluminum-based composite material through gravity casting; the piston body is provided with an insert ring and a salt core internal cooling oil road.

[0043] The aluminum-based composite material in this example is made of components by mass percentage: Si 13.5%, Cu 6.6%, Ni4.7%, Mg 1.3%, Fe 0.1%, Mn 0.2%, Zr 0.01%, V 0.01 %, TiB 2 Particles 1%, the balance is Al.

[0044] Its preparation steps are as follows:

[0045] (A)TiB 2 Granule reinforced pure aluminum composite material masterbatch preparation:

[0046] (1) Prepare a dry crucible, add weighed pure aluminum into the crucible to melt the aluminum ingot, and heat up to 925°C to melt the aluminum ingot;

[0047] (2) Weigh the inorganic salt potassium fluoroborate (KBF 4 ) and potassium fluorotitanate (K 2 TiF 6 ) uniformly mixed according to the mass ratio of 1:...

Embodiment 2

[0059] The aluminum-based composite material in this example is made by mass percentage of components: Si 14%, Cu 6.7%, Ni4.9%, Mg 1.4%, Fe 0.25%, Mn 0.15%, Zr 0.02%, V 0.02 %, TiB 2 Particles 6%, the balance is Al.

[0060] Its preparation steps are as follows:

[0061] (A)TiB 2 Granule Reinforced Pure Aluminum Composite Material Masterbatch Preparation

[0062] (1) Prepare a dry crucible, add weighed pure aluminum into the crucible to melt the aluminum ingot, and heat up to 925°C to melt the aluminum ingot;

[0063] (2) Weigh the inorganic salt potassium fluoroborate (KBF 4 ) and potassium fluorotitanate (K 2 TiF 6 ) uniformly mixed according to the mass ratio of 1:1.8, baked at 210°C for 3 hours and then set aside;

[0064] (3) After the pure aluminum is completely melted, add the dried inorganic salt to the aluminum melt, and carry out mechanical stirring (stirring speed is 100 rpm, the time lasts 30 minutes), and at the same time, argon gas is introduced into the m...

Embodiment 3

[0074] In this example, the aluminum-based composite material is made of components by mass percentage: Si 14.5%, Cu 7%, Ni4.5%, Mg 1.5%, Fe 0.1%, Mn 0.2%, Zr 0.04%, V 0.04 %, TiB 2 12% particles, the balance is Al.

[0075] Its preparation steps are as follows:

[0076] (A)TiB 2 Granule reinforced pure aluminum composite material masterbatch preparation:

[0077] (1) Prepare a dry crucible, add weighed pure aluminum into the crucible to melt the aluminum ingot, and heat up to 925°C to melt the aluminum ingot;

[0078] (2) Weigh the inorganic salt potassium fluoroborate (KBF 4 ) and potassium fluorotitanate (K 2 TiF 6 ) uniformly mixed according to the mass ratio of 1:1.8, baked at 210°C for 3 hours and then set aside;

[0079] (3) After the pure aluminum is completely melted, add the dried inorganic salt to the aluminum melt, and carry out mechanical stirring (the stirring speed is 100 rpm, and the time lasts for 30 minutes), and at the same time, argon gas is introduc...

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Abstract

The invention discloses a piston of an aluminum-based composite material for a heavy-duty diesel engine and a preparation method thereof. The piston includes a piston body, and the piston body is made of an aluminum-based composite material through a gravity casting method; the aluminum-based composite material It is made by mass percentage of components: Si 13.5~14.5%, Cu 6.5~7%, Ni 4.5~5%, Mg 1.3~1.5%, Fe 0.1~0.4%, Mn 0.1~0.4%, Zr 0.01~ 0.04%, V 0.01~0.04%, TiB 2 Particles 1 to 15%, the balance is Al. The aluminum-based composite material piston prepared by the invention can be designed with an inlaid ring and a salt core internal cooling oil passage, has the characteristics of good high temperature resistance and good dimensional stability, and is suitable for various heavy-duty diesel engines.

Description

technical field [0001] The invention belongs to the field of internal combustion engine parts, and in particular relates to a piston of aluminum-based composite material for a heavy-duty diesel engine and a preparation method thereof. Background technique [0002] The burst pressure that a diesel engine piston can withstand is directly related to key indicators such as engine performance and emissions. In response to the increasingly severe environmental problems caused by the exhaust emissions of large transport vehicles and construction machinery, China has implemented the National V emission standards nationwide since July 2017, and will implement the National VI emission standards in 2020. After the implementation of the National V emission standard, the explosion pressure of the domestic heavy-duty diesel engine piston will reach above 18MPa, and the working temperature of the combustion chamber on the top surface of the piston will reach 300-320°C. After the implement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C21/00C22C1/10C22C1/06C22C32/00F02F3/00
CPCF02F3/0084C22C1/06C22C1/1036C22C21/00C22C21/04C22C32/0073C22C1/1052
Inventor 汪明亮王建忠王鹏举吴浩马乃恒王浩伟
Owner ANHUI XIANGBANG COMPOSITE MATERIAL
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