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 the problems of piston engine pistons that cannot adapt to the load and performance, cracking of the combustion chamber port, and broken ends of the model, and achieve Small thermal expansion coefficient, promotion of heterogeneous nucleation, and excellent high-temperature performance

Active Publication Date: 2012-08-22
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] 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 preparation method, on the basis of ZL109 alloy, by adjusting the alloy constituents and the alloy micro constituents such as V, Zr, P and the like and strictly controlling the deterioration technology, a novel cocrystallized Al-Si alloy piston material which is high in intensity and low in thermal expansion coefficient can be prepared, a recrystallization texture can be thinned by Zr and V, the deterioration treatment can be carried out by adding P, and an Al-P black core can be formed, so that the heterogeneous nucleation of primary crystalline silicon can be promoted, and the primary crystalline silicon can be thinned, wherein the average grain size is about 12mu m. The alloy of the preparation method has the characteristics of being good in high-temperature performance, high in hardness, small in thermal expansion coefficient, good in abrasive resistance and the like, thereby being better accordant with the requirement of a high-performance engine piston for a vehicle.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/06C22C1/02
Inventor 王如芬李志琴田红杰翟盼盼潘佳昆
Owner 天津新立中合金集团有限公司
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