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Preparation method of cocrystallized Al-Si alloy piston material

A technology of eutectic aluminum-silicon and aluminum alloy melts, which is applied in the field of preparation of eutectic aluminum-silicon alloy piston materials, can solve problems such as piston engine pistons that cannot adapt to the load and performance, broken ends of models, and cracks in combustion chamber ports. Achieve the effect of small thermal expansion coefficient, excellent high temperature performance, and promote heterogeneous nucleation

Inactive Publication Date: 2012-09-12
TIANJIN LIZHONG ALLOY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional alloy grades such as ZL109, which are still widely used in the domestic industry, can no longer meet the requirements of the newly developed higher load and performance pistons, especially the high-performance vehicle engine pistons. In recent years, broken heads or Cracked combustion chamber port

Method used

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  • Preparation method of cocrystallized Al-Si alloy piston material
  • Preparation method of cocrystallized Al-Si alloy piston material
  • Preparation method of cocrystallized Al-Si alloy piston material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) According to mass percentage Si: 12.3%, Cu: 4.2%, Mg: 0.8%, Ni: 2.8%, Zr: 0.060%, V: 0.060%, P: 0.010%, Al is the balance, weighed for remelting Aluminum ingots, magnesium ingots for remelting, industrial silicon, electrolytic copper, pure nickel plates and AlV5 (aluminum vanadium master alloy), AlZr10 ((aluminum zirconium master alloy), AlP3 (aluminum phosphorus master alloy); industrial silicon is broken Good 1~5cm 3 small pieces;

[0058] (2) Take the sodium-free refining agent by 0.15% of the total feeding mass;

[0059] (3) Put the industrial silicon, electrolytic copper, magnesium ingot for remelting, pure nickel plate, AlV5, AlZr10, ALP3, aluminum ingot for remelting and sodium-free refining agent in step (1), step (2) into the temperature Dry in a constant temperature preheating drying oven at 250°C for 3 hours;

[0060] (4) Put the dried industrial silicon, pure nickel plate, and aluminum ingot for remelting in step (3) into the CX-GR-150 industrial elec...

Embodiment 2

[0071] (1) Si: 12.5%, Cu: 4.4%, Mg: 0.8%, Ni: 3.0%, Zr: 0.065%, V: 0.065%, P: 0.010%, based on the mass percentage of the alloying elements in the aluminum-silicon alloy , and Al is the balance, respectively weigh the industrial silicon, electrolytic copper, magnesium ingots for remelting, pure nickel plate, AlV5, AlZr10, aluminum ingots for remelting and AlP3 master alloy; wherein industrial silicon is crushed 1 ~5cm 3 small pieces;

[0072] (2) take by weighing 0.15% of the total feeding quality of step (1) sodium-free refining agent;

[0073] (3) Put the industrial silicon, electrolytic copper, magnesium ingot for remelting, pure nickel plate, AlV5, AlZr10, AlP3, aluminum ingot for remelting and sodium-free refining agent in step (1), step (2) into the temperature Dry in a constant temperature preheating drying oven at 250°C for 3 hours;

[0074] (4) Put the dried industrial silicon, pure nickel plate and aluminum ingot for remelting in step (3) into the industrial elect...

Embodiment 3

[0084] (1) According to mass percentage Si: 12.5%, Cu: 4.0%, Mg: 0.9%, Ni: 3.0%, Zr: 0.07%, V: 0.07%, P: 0.014%, Al is the balance, and remelted Aluminum ingots, magnesium ingots for remelting, industrial silicon, electrolytic copper, AlNi20 (aluminum-nickel master alloy), AlV5 (aluminum-vanadium master alloy), AlZr10 ((aluminum-zirconium master alloy), AlP3 (aluminum-phosphorus master alloy); Industrial silicon is crushed 1~5cm 3 small pieces;

[0085] (2) Take the sodium-free refining agent by 0.16% of the total feeding mass;

[0086] (3) Put the industrial silicon, electrolytic copper, magnesium ingots for remelting, AlNi20, AlV5, AlZr10, AlP3, aluminum ingots for remelting and sodium-free refining agent in step (1) and step (2) at a temperature of 250°C Dry in a constant temperature preheating drying oven for 2 hours;

[0087] (4) Put the dried industrial silicon and aluminum ingots for remelting in step (3) into the CX-GR-150 industrial electric furnace, and set the te...

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Abstract

The invention provides a preparation method of a cocrystallized Al-Si alloy piston material. According to the method, metal silicon, copper chops, metal magnesium, AlNi20, AlV5, AlZr10, unalloyed aluminium ingots for remelting and Al-P intermediate alloy are taken as raw materials to prepare a novel cocrystallized alloy material with high strength and low coefficient of thermal expansion by controlling a deteriorating process. The alloy prepared by the method has the characteristics of high temperature performance, high hardness, small coefficient of thermal expansion, good wear resistance and the like, and is more in accordance with the requirement for a high performance engine piston for vehicles.

Description

technical field [0001] The invention belongs to the field of nonferrous metal material preparation technology and metamorphic treatment technology, and in particular relates to a preparation method of a eutectic aluminum-silicon alloy piston material. Background technique [0002] The piston is the heart of the engine, it bears alternating mechanical and thermal loads, and is one of the key components in the engine with the worst working conditions. Working at high temperature, high pressure and high speed determines the working efficiency of the engine, so the piston alloy is required to have better volume stability and higher high temperature strength. The continuous improvement of engine performance has led to a significant increase in the working load of the piston, thus putting forward higher requirements on the performance of the piston, especially the high temperature performance, and the piston material is the first to bear the brunt. [0003] At present, traditiona...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22C1/06C22F1/043
Inventor 王如芬李志琴田红杰翟盼盼
Owner TIANJIN LIZHONG ALLOY GROUP
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