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Manufacturing method of aluminum alloy piston

A manufacturing method and technology of aluminum alloy, applied in the direction of piston, etc., can solve the problems of increased pressure and temperature in the combustion chamber of the engine, and the ring groove of the aluminum alloy piston is easily worn, so as to reduce the weight and friction, improve the wear characteristics of the ring groove, Effect of increasing thermal properties

Inactive Publication Date: 2018-12-07
ANHUI SIYUAN SANQING INTELLIGENT MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with direct fuel injection as described above, the pressure and temperature inside the combustion chamber of the engine are greatly increased, resulting in considerable thermal, mechanical and chemical loads on the piston
[0007] In particular, in the case where the ring groove of the piston ring is provided, a considerable operating load is transmitted to the piston by the piston ring in contact with the cylinder wall, so that the ring groove of the aluminum alloy piston is easily worn

Method used

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  • Manufacturing method of aluminum alloy piston
  • Manufacturing method of aluminum alloy piston
  • Manufacturing method of aluminum alloy piston

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Experimental program
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Effect test

specific Embodiment approach 1

[0017] Specific Embodiment 1: This embodiment is achieved through the following steps: 1. The cylindrical alloy ingot is heated to 450-470° C., and the percentage by weight of the alloy ingot is 11.6%-13.1% for Si and 0.01% for Fe. ~0.10%, Cu 0.6%~1.2%, Mn 0.01~0.15%, Mg 0.85%~1.2%, Ni 0.6%~1.2%, Zn 0.01~0.23%, Cr 0.01~0.09%, Ti 1.5-2.6%, B 0.5-1.3%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, the rest is Al, wherein, the composition ratio of Ti:B:Cu is 2.3:1:1; Cutting after pressing to make a forging blank; 3. Quenching the blank after free forging and die forging; 4. Carrying out aging treatment.

specific Embodiment approach 2

[0018] Specific embodiment two: In this embodiment, the alloy ingot is heated to 452° C. in step one, and in the weight percentage of the alloy ingot, Si is 11.7%, Fe is 0.02%, Cu is 0.7%, and Mn is 0.05%. Mg is 0.9%, Ni is 0.7%, Zn is 0.02, Cr is 0.02%, Ti is 1.61%, B is 0.7%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, and the rest is Al; quenching temperature in step 3 520-525°C, the quenching holding time is 230-250 minutes, the temperature of the water used for quenching is 50-60°C; the primary aging temperature in step 4 is 140-145°C, and the holding time is 3.5-4.5 hours; the secondary The aging temperature is 165-170°C, and the holding time is 2.5-3 hours.

specific Embodiment approach 3

[0019] Specific embodiment three: In this embodiment, the alloy ingot is heated to 452°C in step one, and the weight percentage of the alloy ingot is 12.5% ​​for Si, 0.02 for Fe, 1.0% for Cu, 0.10% for Mn, and 0.10% for Mg is 1.0%, Ni is 1.0%, Zn is 0.1%, Cr is 0.05%, Ti is 2.3, B is 1.0%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, and the rest are Al; the quenching temperature in step 3 is 522°C, the holding time for quenching is 235 minutes, and the temperature of the water used for quenching is 52°C; the primary aging temperature in step 4 is 142°C, and the holding time is 3.8 hours; the secondary aging temperature is 166°C, and the holding time is 2.6 hours .

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Abstract

The invention discloses a manufacturing method of an aluminum alloy piston. According to the manufacturing method, the advantages that the weight and the friction of the piston are reduced, the abrasion characteristic of an annular groove is improved, meanwhile, the productivity is improved, moreover, the cost of raw materials is reduced, the heat property and the elasticity of the piston are increased, and the service life of the piston is prolonged.

Description

technical field [0001] The present invention relates to a method for manufacturing an aluminum alloy piston for a vehicle, and more particularly, relates to a method for manufacturing an aluminum alloy piston having excellent elasticity, durability, thermal characteristics, and formability. Background technique [0002] With the development of the automobile industry, the piston is one of the key components in the vehicle. In the past, high-grade cast iron or chromium-nickel cast iron with wear resistance and mechanical strength such as cylinder blocks were mainly used, and pistons were manufactured by a center casting method that can form a uniform structure. [0003] However, the piston made of cast iron is heavy, so the inertia increases during the high-speed rectilinear reciprocating motion, and the mobility decreases, which leads to a decrease in engine output and a decrease in fuel efficiency. [0004] Therefore, in order to improve the mobility of the piston, maintai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/047B21K1/18
CPCC22C21/02B21K1/18C22F1/047
Inventor 范煜程玉成严建文王玉山
Owner ANHUI SIYUAN SANQING INTELLIGENT MFG CO LTD