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Aluminum based composite material for piston and preparation thereof

A technology of aluminum-based composite materials and pistons, applied in the field of metal materials, can solve the problems of high cost, complicated process, difficult recycling, etc., and achieve the effect of low production cost, simple process and good wettability

Inactive Publication Date: 2009-06-24
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of making pistons from aluminum matrix composites is complicated, the cost is high, and it is difficult to recycle
As such, it is currently limited to local buffs for pistons

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) at first by crystalline silicon 10%, Si-20P master alloy 10%, copper 2%, nickel 2%, magnesium 1%, titanium 0.05%, all the other are the mass ratio of aluminum and take raw material;

[0018] (2) Carry out rapid solidification argon atomization treatment to Si-20P master alloy, obtain the granular Si-20P master alloy that diameter is below 1mm;

[0019] (3) Melt commercially pure aluminum, silicon, copper, nickel, magnesium and titanium at 800°C in a smelting furnace to form a multi-component aluminum alloy, add rapid solidification Si-20P intermediate alloy particles after refining, and stir rapidly until the reaction is complete ;

[0020] (4) Metal mold gravity casting is used to pour the piston blank, and the pouring temperature is 760°C;

[0021] (5) Perform T6 heat treatment, machining and surface treatment on the cast blank to obtain a finished product.

[0022] The Si-20P master alloy in the step (1) is composed of two elements, silicon and phosphorus, and ...

Embodiment 2

[0024] (1) at first by crystalline silicon 3%, Si-15P master alloy 20%, copper 1%, nickel 3%, magnesium 1.5%, titanium 0.08%, all the other are the mass ratio of aluminum and take raw material;

[0025] (2) Carry out rapid solidification argon atomization treatment to Si-15P master alloy, obtain the granular Si-15P master alloy that diameter is below 1mm;

[0026] (3) Melt commercially pure aluminum, silicon, copper, nickel, magnesium and titanium at 850°C into a multi-component aluminum alloy in a melting furnace, add rapid solidification Si-15P intermediate alloy particles after refining, and stir rapidly until the reaction is complete ;

[0027] (4) Squeeze casting is used to pour the piston blank, and the pouring temperature is 780°C;

[0028] (5) Perform T6 heat treatment, machining and surface treatment on the cast blank to obtain a finished product.

[0029] The Si-15P master alloy in the step (1) is composed of two elements, silicon and phosphorus, and the mass perce...

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Abstract

The invention belongs to the metallic material field, relating to aluminium base composite materials used in a piston and a preparation method thereof. The composite materials comprise a matrix alloy and a wild phase. The matrix alloy comprises silicon, copper, nickel, magnesium, phosphorus, titanium and aluminium and is characterized in that the matrix alloy comprises the components according to the mass percent: 10.0-25.0% of silicon, 0.5-2.5% of copper, 0.5-4.0% of nickel, 0.2-1.5 of magnesium, 0.2-3.0 % of phosphorus, 0.01-1.0% of titanium and the rest is magnesium. The wild phase is AIP particles generated by reaction in situ. The preparation method comprises the following steps: the raw materials are weighted according to the mass percent; flash set argon pulverization treatment is carried out on Si-P interalloy; the commercially pure aluminium, silicon, copper, nickel, magnetism and titanium are melted into multielement aluminium alloy in a smelter hearth in the temperature of 760 DEG C to 850 DEG C, and is added with flash set Si-P interalloy particles after refining; the metal mold gravity casting or the extrusion casting are used for pouring piston rough; T6 heat treatment is carried out on the casting rough. In the invention, the production can be carried out by using a common aluminium alloy smelting unit in atmosphere condition. The invention has simple technique and low production cost.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to an AlP reinforced aluminum-based composite material for pistons and a preparation method thereof. Background technique [0002] Improving the power of the engine and the urgent requirements for energy saving and emission reduction have put forward higher and higher requirements for the high temperature strength and high temperature creep resistance of engine parts (especially pistons). Al-Si alloy is the preferred material for making pistons due to its advantages of light weight, easy processing and low cost. But the high temperature strength of Al-Si alloy is low, in order to improve its high temperature performance, a lot of researches have been carried out at home and abroad. The performance of piston alloys can be improved by melt treatment, and phosphorus modification treatment is widely used in the engine piston manufacturing industry. The Chinese patent No. 200510044827.3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03B22D18/04B22D18/02C22F1/043
Inventor 武玉英刘相法张国华李辉冯增建
Owner SHANDONG UNIV
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