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High-heat-strength aluminum-silicon alloy material and manufacturing method thereof

A technology of an aluminum-silicon alloy and a manufacturing method, applied in the field of high-strength alloys and their preparation, can solve problems such as restricting the development of pistons, and achieve the effects of refining grains and inhibiting recrystallization behavior

Inactive Publication Date: 2021-10-15
江苏华星机电制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piston is subjected to high temperature, high pressure thermal load and mechanical load in the engine. The traditional aluminum-silicon alloy cannot be used for a long time in such a harsh environment. The insufficient high-temperature performance of the traditional aluminum-silicon alloy seriously restricts the development of the piston. Therefore, a high-heat Strength aluminum silicon alloy material is very necessary

Method used

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  • High-heat-strength aluminum-silicon alloy material and manufacturing method thereof
  • High-heat-strength aluminum-silicon alloy material and manufacturing method thereof
  • High-heat-strength aluminum-silicon alloy material and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1: A high-heat-strength aluminum-silicon alloy material, including components by mass percentage: Si: 8.5-10%; Cu: 3.0-4.5%; Ni: 2.0-3.0%; Mg: 1.0-2.5%; Zr: 0.05-0.3%; Ti: 0.05-0.3%; Er: 0.05-0.3%; Pt: 0.05-0.23%, and the rest is Al.

[0034] Furthermore, Zr is added in an amount of 0.05% to 0.25% in the aluminum-silicon alloy, and zirconium and aluminum form a ZrAl3 compound, which can hinder the recrystallization process and refine the recrystallization grains. Zirconium can also refine the casting structure, but the effect is smaller than that of titanium. Since zirconium has less effect on quenching sensitivity than chromium and manganese, it is advisable to use zirconium instead of chromium and manganese to refine the recrystallized structure

[0035] Further, the composition by mass percentage is included: Zr: 0.08-0.16%. Zr particles have a good coherent relationship with Al. AlgZr particles are small and densely distributed. During the peritectic react...

Embodiment 2

[0040] Embodiment 2: a kind of manufacturing method of high thermal strength aluminum-silicon alloy material, such as figure 1 shown, including the following steps:

[0041] S1. Prepare each component to prepare liquid aluminum, and prepare the mold.

[0042] S2. Heat the molten aluminum to 760°C and smoothly fill the mold into the inner cavity through the mold runner, and use the rapid cooling casting method to cool the key parts of the piston. temperature control. Make sure the top riser is up. After the molten aluminum is cooled and solidified, the mold is opened and the casting is taken out after forming.

[0043] S3. Put it into a water tank at 60-80°C for as-cast quenching, and its water level is controlled at the center of the pin hole.

[0044] S4. Put the quenched casting into an oven, and temper at 230°C for 15 hours to ensure that the hardness of the tempered material is controlled at 105-140HB.

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Abstract

The invention discloses a high-heat-strength aluminum-silicon alloy material and a manufacturing method thereof. According to the technical scheme, the high-heat-strength aluminum-silicon alloy material is characterized by comprising, by mass, 8.5%-10% of Si, 3.0%-4.5% of Cu, 2.0%-3.0% of Ni, 1.0%-2.5% of Mg, 0.05%-0.3% of Zr, 0.05%-0.3% of Ti, 0.05%-0.3% of Er, 0.05%-0.23% of Pt and the balance Al. The high-heat-strength aluminum-silicon alloy material has the advantages that the better high-temperature creep resistance and the better high heat strength are achieved, grains are refined, and the metallographic structure is more uniform.

Description

technical field [0001] The invention relates to the field of high-strength alloys and their preparation, in particular to a high-heat-strength aluminum-silicon alloy material and a manufacturing method thereof. Background technique [0002] Aluminum-silicon alloy is a very important industrial alloy, which is widely used in aviation, transportation, construction, automobile and other important industries. Whether it is aviation, navigation or land transportation, it is inseparable from the engine. The piston is called the heart of the engine, and it is one of the most important parts in the engine. The piston is subjected to high temperature, high pressure thermal load and mechanical load in the engine. The traditional aluminum-silicon alloy cannot be used for a long time in such a harsh environment. The insufficient high-temperature performance of the traditional aluminum-silicon alloy seriously restricts the development of the piston. Therefore, a high-heat Strength alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043
CPCC22C21/02C22F1/043C22F1/002
Inventor 袁晓麒张莲高凌宇
Owner 江苏华星机电制造有限公司
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