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Method for casting aluminum piston with insert ring and cooling coil pipe

A technology for cooling coils and pistons, applied in the field of aluminum piston casting, can solve the problems of poor integration between the insert ring and the piston body, inaccurate positioning of the cooling coils, high manufacturing costs, etc. High utilization effect

Active Publication Date: 2009-11-04
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

[0004] The insert ring and the cooling coil are accessories of the aluminum piston. In the prior art, there are problems such as poor bonding between the insert ring and the piston body and inaccurate positioning of the cooling coil, resulting in a low production rate of the piston and high manufacturing costs, which seriously restrict Application of Aluminum Piston

Method used

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  • Method for casting aluminum piston with insert ring and cooling coil pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the preparation process of aluminum piston is as follows:

[0034] ①Preparation of aluminum alloy for ZL109 piston, its material is composed of the following components and weight percentages: Si: 11.5%; Mg: 0.8%; Cu: 0.5%; Ni: 1.0%; Fe: 0.1%; Ti: 0.01%; Mn : 0.01%; Zn: 0.01%; Cr: 0.001%; ​​Pb: 0.001%; ​​Sn: 0.001%; ​​the rest is AL;

[0035] ②The prepared aluminum alloy is heated and melted in a melting furnace. After the aluminum alloy is completely melted into molten aluminum, the temperature of the molten aluminum is adjusted to 760°C, and a compound phosphorus salt modifier is used for modification treatment. The weight of the added weight is the weight of the smelted aluminum alloy 0.2% of the molten aluminum; lower the temperature of the molten aluminum to 740°C, and use an aluminum-titanium-boron refining agent for refining treatment, and the added weight is 0.10% of the weight of the smelted aluminum alloy; drop the temperature of the molten alumi...

Embodiment 2

[0044] ①Preparation of aluminum alloy for ZL109 piston, its material is composed of the following components and weight percentage: Si: 12.0%; Mg: 1.0%; Cu: 1.0%; Ni: 1.2%; Fe: 0.2%; Ti: 0.1%; Mn : 0.1%; Zn: 0.1%; Cr: 0.01%; Pb: 0.01%; Sn: 0.005%; the rest is AL;

[0045] ②The prepared aluminum alloy is heated and melted in a melting furnace. After the aluminum alloy is completely melted into molten aluminum, the temperature of the molten aluminum is adjusted to 770°C, and a compound phosphorus salt modifier is used for modification. The weight of the added weight is the weight of the smelted aluminum alloy. 0.3% of the molten aluminum; the temperature of the molten aluminum is lowered to 750°C, and the aluminum titanium boron refiner is used for refining treatment, and the weight added is 0.15% of the weight of the smelted aluminum alloy; the temperature of the molten aluminum is lowered to 730°C, and the refining agent is used for refining Refining treatment, the added weigh...

Embodiment 3

[0053] ①Preparation of aluminum alloy for ZL109 piston, its material is composed of the following components and weight percentages: Si: 13.0%; Mg: 1.3%; Cu: 1.5%; Ni: 1.5%; Fe: 0.4%; Ti: 0.2%; Mn : 0.2%; Zn: 0.2%; Cr: 0.05%; Pb: 0.05%; Sn: 0.01%; the rest is AL;

[0054] ②The prepared aluminum alloy is heated and melted in a melting furnace. After the aluminum alloy is completely melted into molten aluminum, the temperature of the molten aluminum is adjusted to 780°C, and a compound phosphorus salt modifier is used for modification. The weight of the added weight is the weight of the smelted aluminum alloy 0.4% of the molten aluminum; lower the temperature of the molten aluminum to 760°C, and use an aluminum-titanium-boron refining agent for refining treatment, and the added weight is 0.2% of the weight of the smelted aluminum alloy; drop the temperature of the molten aluminum to 740°C, and use a refining agent for refining Refining treatment, the added weight is 0.5% of the ...

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Abstract

The invention provides a method for casting aluminum piston with an insert ring and a cooling coil pipe, comprising steps as follows: (1) preparing aluminum alloy for piston; (2) melting; (3) mould setting of the cooling coil pipe; (4) mould casting of insert ring; (5) mould closing and pouring; (6) mould opening and heat treatment for taking out the casting, processing low temperature melting treatment and ageing heat treatment to obtain the piston blank; (7) post-treatment for carrying out mechanical processing and surface treatment on the piston blank to obtain the aluminum piston finished product. The invention also discloses a method for casting aluminum piston with an insert ring and a cooling coil pipe. Compared with the prior art, the advantages of the invention are as follows: the piston body has compact structure, and the combination between the wear resistant insert ring and the piston body through ultrasonic detection is good, and the position of the cooling coil pipe is precise and the anti-stretching intensity is high.

Description

technical field [0001] The invention relates to an aluminum alloy for a piston. The invention also relates to a casting method of an aluminum piston with an insert ring and a cooling coil. The aluminum piston can be applied to fields such as large ships and railway locomotives. Background technique [0002] At present, railway locomotives and marine diesel engines are developing towards high power and high load, and aluminum pistons, as important mechanical components of internal combustion engines, directly affect the performance of mechanical equipment. As a whole, aluminum pistons are commonly worn with high-nickel cast iron. Inserts and cooling coils require high casting quality. Using conventional metal gravity casting and sand casting aluminum pistons, it is easy to produce casting defects such as pores, shrinkage porosity, cracks, and slag inclusions, the microstructure density is poor, and the mechanical properties cannot meet the requirements of use. Not only that, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04C22C21/02C22C1/02C22C1/06C22F1/043
Inventor 彭银江侯林冲沈建明高明灯朱秀荣费良军张华任静
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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