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Hypoeutectic Al-Si alloy material for all-aluminum engine of high-grade car and preparation method of hypoeutectic Al-Si alloy material

A high-end automobile and aluminum-silicon alloy technology, applied in the field of aluminum-silicon alloy, can solve the problems of not meeting the requirements of high-end automobile engines and low alloy mechanical properties, and achieve the effect of short melting time, low melting temperature and complete melting

Active Publication Date: 2014-12-10
天津新立中合金集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Domestic brand Al-Si alloys have low mechanical properties and cannot meet the requirements of high-end automobile engines

Method used

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  • Hypoeutectic Al-Si alloy material for all-aluminum engine of high-grade car and preparation method of hypoeutectic Al-Si alloy material
  • Hypoeutectic Al-Si alloy material for all-aluminum engine of high-grade car and preparation method of hypoeutectic Al-Si alloy material
  • Hypoeutectic Al-Si alloy material for all-aluminum engine of high-grade car and preparation method of hypoeutectic Al-Si alloy material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of hypoeutectic aluminum-silicon alloy material for high-end automobile all-aluminum engine, the specific steps are:

[0036] ⑴ The upper limit of Cu and Sr elements and decalcifying agent is as follows: Si: 7.1%, Mg: 0.36%, Cu: 0.54% (Cu: Mg = 2.5:1), Ti: 0.11%, Mn: 0.063%, and Sr: 0.028 %, and receive industrial silicon, magnesium, copper, AlTi10, AlMn10, AlSr10, and aluminum ingots for remelting a total of 20t according to the ingredient card;

[0037] ⑵Weigh 40kg of Xuzhou Liwei Aluminum Decalcifying Agent;

[0038] ⑶ Put all the raw materials in step (1) and step (2) into a constant temperature preheating drying room at a temperature of 240°C and dry for 2 hours;

[0039] ⑷Put the dried aluminum ingots for remelting into the flame reflection melting furnace, and ignite natural gas to melt;

[0040] ⑸ After all the aluminum ingots are melted, adjust the temperature of the molten aluminum to 739℃ and prepare the converter;

[0041] ⑹Sprinkle the dried desc...

Embodiment 2

[0050] A preparation method of hypoeutectic aluminum-silicon alloy material for high-end automobile all-aluminum engine, the specific steps are:

[0051] ⑴Cu, Sr element and the lower limit of decalcifying agent, according to Si: 7.2%, Mg: 0.33%, Cu: 0.5% (Cu: Mg = 1.5:1), Mn: 0.072%, Ti: 0.11%, Sr: 0.018% The proportion of batching, and according to the batching card to receive industrial silicon, metal magnesium, copper rice, AlTi10, AlMn10, AlSr10, aluminum ingots for remelting a total of 20t;

[0052] ⑵ Weigh 30kg of Xuzhou Liwei Aluminum Decalcifying Agent;

[0053] ⑶ Put all the raw materials in step (1) and step (2) into a constant temperature preheating drying room at a temperature of 280°C for 2 hours;

[0054] ⑷Put the dried aluminum ingots for remelting into the flame reflection melting furnace, and ignite natural gas to melt;

[0055] ⑸ After all the aluminum ingots are melted, adjust the temperature of the molten aluminum to 739℃ and prepare the converter;

[0056] ⑹Sprinkl...

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Abstract

The invention relates to a hypoeutectic Al-Si alloy material for an all-aluminum engine of a high-grade car and a preparation method of the hypoeutectic Al-Si alloy material. The hypoeutectic Al-Si alloy material with high strength and high toughness is researched by adding Cu and Mn strengthening elements and a Sr modification element, improving an industrial silicon melting process and adopting a process for removing gas and residues in a furnace and a casting process and a technology for detecting refinement and modification of alloy on line through thermal analysis. The hypoeutectic Al-Si alloy material has the tensile strength of 338-345Mpa and the elongation rate of 8.5-9.2% and can be completely applied to the all-aluminum engine of the high-grade car at home and abroad.

Description

Technical field [0001] The invention belongs to the field of aluminum-silicon alloys, and relates to an aluminum-silicon alloy for automobile all-aluminum engines, in particular to a hypoeutectic aluminum-silicon alloy material for high-end automobile all-aluminum engines and a preparation method thereof. Background technique [0002] The car engine is the heart of the car, and its quality directly determines the quality of the car. Both the cylinder block and the cylinder head of traditional automobile engines are made of cast iron, which has many inherent shortcomings, such as large weight, poor heat dissipation, and high friction coefficient. The all-aluminum engine is light in weight, can effectively reduce fuel consumption and improve the driving performance of the vehicle, which is the development trend of high-end automobile engines at home and abroad. At present, some high-end cars have adopted all-aluminum engines, such as Rover's K series engine, BMW's M52 inline six-c...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/06C22C1/02B22D1/00C22F1/043
Inventor 霍会娟黄海军于富兴孔艳静墨青
Owner 天津新立中合金集团有限公司
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