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Aluminum piston manufacturing method

A technology of piston and aluminum alloy, applied in the direction of piston, cylindrical piston, plunger, etc., can solve the problems of insufficient bonding strength of composite material and matrix material, limitation of not being able to manufacture high-power engine piston, and long process cycle, etc. The effect of improving high temperature mechanical properties and ablation resistance, improving high temperature strength and thermal fatigue resistance, and improving mechanical properties

Inactive Publication Date: 2013-02-27
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacturing process adopted abroad is to make the reinforced part of the piston into a composite material first, and then form it through metal mold gravity casting or squeeze casting process. This process mainly has the disadvantages of long process cycle and insufficient bonding strength between composite material and matrix material. The limitations of high-power engine pistons with internal cooling oil chambers on the top cannot be manufactured when the squeeze casting process is formed

Method used

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  • Aluminum piston manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: the preparation process of aluminum piston is as follows:

[0032] ① Prepare a new type of piston alloy composition, and its material is composed of the following components and mass percentages: Si: 11.0%; Mg: 0.6%; Cu: 2.6%; Ni: 1.8%; Fe: 0.1%; Ti: 0.1%; Mn: 0.1%; Zn: 0.1%; Cr: 0.001%; ​​Pb: 0.001%; ​​Sn: 0.001%; ​​the rest is Al;

[0033] ②Put the prepared new piston alloy into a melting furnace for melting. After melting, control the temperature of the molten aluminum to 720°C, refine it with a refining agent, add 0.3% of the aluminum alloy, and control the temperature of the molten aluminum to 760°C. Phosphor copper alloy modifier is used for treatment, the added mass is 0.2% of the mass of the aluminum alloy, and the temperature of the molten aluminum is controlled to 740°C. The temperature is controlled at 730°C, treated with JA04C refining agent, the added mass is 0.3% of the aluminum alloy mass, after standing still for 15 minutes, the temperatur...

Embodiment 2

[0043] ① Prepare a new type of piston alloy composition, and its material is composed of the following components and mass percentages: Si: 12.0%; Mg: 0.9%; Cu: 3.2%; Ni: 2.3%; Fe: 0.2%; Ti: 0.15%; Mn: 0.2%; Zn: 0.2%; Cr: 0.01%; Pb: 0.01%; Sn: 0.005%; the rest is Al;

[0044] ②Put the prepared new piston alloy into the melting furnace for melting. After melting, control the temperature of the molten aluminum to 730°C. Add JA04C refining agent with a refining agent, the added quality is 0.4% of the aluminum alloy, and the temperature of the molten aluminum is controlled at 770°C, treated with phosphorus copper alloy modifier, the added mass is 0.3% of the aluminum alloy mass, the temperature of the aluminum liquid is controlled to 750°C, treated with aluminum titanium boron refiner, the added mass is 0.15% of the aluminum alloy mass, the The temperature of the molten aluminum is controlled at 735°C, treated with JA04C refining agent, and the added mass is 0.4% of the mass of th...

Embodiment 3

[0054] ① Prepare a new type of piston alloy composition, and its material is composed of the following components and mass percentages: Si: 13.0%; Mg: 1.2%; Cu: 4.0%; Ni: 2.8%; Fe: 0.3%; Ti: 0.2%; Mn: 0.3%; Zn: 0.3%; Cr: 0.05%; Pb: 0.05%; Sn: 0.01%; the rest is Al;

[0055] ②Put the prepared new piston alloy into the melting furnace for melting. After melting, control the temperature of the molten aluminum to 740°C. Use a refining agent to add JA04C refining agent. The added quality is 0.5% of the aluminum alloy, and the temperature of the molten aluminum is controlled at 780°C, treated with a phosphor copper alloy modifier, the added mass is 0.4% of the aluminum alloy mass, the temperature of the molten aluminum is controlled to 760°C, treated with an aluminum-titanium-boron refiner, and the added mass is 0.2% of the aluminum alloy mass, the The temperature of the molten aluminum is controlled at 740°C, treated with JA04C refining agent, and the added mass is 0.5% of the mass...

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Abstract

The invention relates to an aluminum piston manufacturing method, which is characterized by comprising the following steps: (1) preparing an aluminum alloy for a piston; (2) carrying out a smelting treatment, wherein the prepared piston alloy is placed into a melting furnace to carry out melting, and the melted aluminum alloy liquid is subjected to primary refining, modification, refinement and secondary refining to provide a spare use for casting; (3) manufacturing an alumina ceramic short fiber preform; (4) preheating the alumina ceramic short fiber preform; (5) preheating a mold; (6) carrying out extrusion casting; (7) carrying out solidification piece taking; (8) carrying out a heat treatment on an aluminum piston blank; and (9) carrying out mechanical processing and a surface treatment on the aluminum piston blank to obtain the aluminum piston finished product. Compared to the aluminum piston in the prior art, the aluminum piston of the present invention has advantages of high strength and good ablation resistance.

Description

technical field [0001] The invention relates to a method for preparing an aluminum piston. The aluminum piston is mainly used in the fields of high-strength diesel engines such as heavy-duty trucks and generator sets. Background technique [0002] At present, high-strength diesel engines are developing toward high power and high load, and aluminum pistons are important reciprocating components of internal combustion engines, and their performance directly affects the performance and reliability of high-strength diesel engines. The aluminum piston usually has an internal cooling oil chamber in the thick part to cool the piston, and the first ring groove of the piston is equipped with a high-nickel cast iron wear-resistant insert to improve the wear resistance of the first ring groove. Integral pistons for high-strength engines have very high requirements on casting quality, and no casting defects are allowed. Using conventional metal gravity casting and sand casting aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/02C22C1/06B22D19/14B22D18/00C22F1/043F16J1/01
Inventor 彭银江周灵展张广明高明灯朱秀荣侯林冲费良军徐英杨亚琛王秀玲
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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