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Method for preparing hypereutectic aluminum-silicon alloy semi-solid slurry or billet

A technology of semi-solid slurry and aluminum-silicon alloy, which is applied in the field of preparation of hypereutectic aluminum-silicon alloy semi-solid slurry or billet, which can solve problems affecting plasticity and wear resistance, reducing alloy mechanical properties, local stress concentration, etc. , to achieve the effect of excellent mechanical properties, good surface quality and easy implementation

Inactive Publication Date: 2016-03-02
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coarse primary silicon severely splits the alloy matrix. Under the action of external force, the tip and corners of the silicon phase in the alloy are likely to cause local stress concentration, thereby significantly reducing the mechanical properties of the alloy, especially affecting its plasticity and wear resistance.

Method used

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  • Method for preparing hypereutectic aluminum-silicon alloy semi-solid slurry or billet
  • Method for preparing hypereutectic aluminum-silicon alloy semi-solid slurry or billet
  • Method for preparing hypereutectic aluminum-silicon alloy semi-solid slurry or billet

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Experimental program
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Effect test

Embodiment 1

[0028] This embodiment relates to a method for preparing a hypereutectic aluminum-silicon alloy semi-solid slurry, which includes the following steps:

[0029] Step 1. Pre-process an aluminum-silicon alloy of model AlSi12Cu (wherein, the weight percentage of Si is 12.5-13.5%, and the liquidus temperature of the aluminum-silicon alloy is 600-610℃) at a temperature of 150-250℃. Heat, add it to the crucible resistance furnace and heat it to melt. After the aluminum-silicon alloy is melted, stir at a temperature of 670~680℃, let it stand for 10-15 minutes for the first time, cool to 650~660℃, refining for 10-15 minutes, and stir. Take off the slag and let it stand for the second time for 10-20 minutes while adjusting the temperature of the aluminum-silicon alloy melt so that the temperature is 30-60℃ higher than the liquidus temperature of the alloy;

[0030] Step 2: Apply the cast aluminum alloy paint of Weifang Huashi Casting Materials Co., Ltd. on the inner wall of the mechanical dr...

Embodiment 2

[0033] This embodiment relates to a method for preparing a hypereutectic aluminum-silicon alloy semi-solid slurry, which includes the following steps:

[0034] Step 1. Pre-process the aluminum-silicon alloy model YL117 (wherein, the weight percentage of Si is 16-18%, and the liquidus temperature of the aluminum-silicon alloy is 690-700℃) at a temperature of 150-250℃. Heat, add it to a crucible resistance furnace and heat it to melt. After the aluminum-silicon alloy is melted, stir at a temperature of 680~750℃, let it stand for 10-15 minutes for the first time, cool to 680~720℃, refining for 10-15 minutes, stirring Take off the slag and let it stand for the second time for 10-20 minutes while adjusting the temperature of the aluminum-silicon alloy melt so that the temperature is 30-60℃ higher than the liquidus temperature of the alloy;

[0035] Step 2: Preheat the mechanical drum coated with the casting aluminum alloy coating of Weifang Huashi Casting Materials Co., Ltd. to 300°C. T...

Embodiment 3

[0038] This embodiment relates to a method for preparing a hypereutectic aluminum-silicon alloy semi-solid blank, which includes the following steps:

[0039] Step 1. Pre-process the aluminum-silicon alloy model YL117 (wherein, the weight percentage of Si is 16-18%, and the liquidus temperature of the aluminum-silicon alloy is 690-700℃) at a temperature of 150-250℃. Heat, add it to a crucible resistance furnace and heat it to melt. After the aluminum-silicon alloy is melted, stir at a temperature of 680~750℃, let it stand for 10-15 minutes for the first time, cool to 680~720℃, refining for 10-15 minutes, stirring Take off the slag and let it stand for the second time for 10-20 minutes while adjusting the temperature of the aluminum-silicon alloy melt so that the temperature is 30-60℃ higher than the liquidus temperature of the alloy;

[0040] Step 2: Apply the cast aluminum alloy paint of the aluminum alloy casting Weifang Huashi Casting Materials Co., Ltd. on the inner wall of the...

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Abstract

The invention provides a preparation method for hypereutectic aluminum-silicon alloy semi-solid state sizing agent or blank. The method includes the following steps: 1, taking an aluminum-silicon alloy, pre-heating, melting the aluminum-silicon alloy, stirring, standing for the first time, cooling, refining, stirring, slag skimming, standing for the second time, and meanwhile adjusting the temperature of aluminum-silicon alloy melt to be 30-60-DEG C higher than the alloy liquidus temperature; 2, smearing the aluminum alloy casting coating on the inner wall of a mechanical roller, drying and pre-heating; 3, injecting the aluminum-silicon alloy melt into the mechanical roller through a quantitative pouring system fast and stirring to obtain hypereutectic aluminum-silicon alloy semi-solid state sizing agents; 4, pouring the semi-solid state sizing agents into a metal ingot mold and solidifying to obtain hypereutectic aluminum-silicon alloy semi-solid state blanks. The preparation method is simple in process steps and easy to implement, reduces device production cost and meanwhile improves preparation efficiency of hypereutectic aluminum-silicon alloy with fine-grained primary silicon.

Description

Technical field [0001] The invention belongs to the technical field of semi-solid metal preparation, and particularly relates to a method for preparing a hypereutectic aluminum-silicon alloy semi-solid slurry or blank. Background technique [0002] In the 21st century, with the rise of crude oil prices, social progress, and rapid development of manufacturing technology, under the requirements of energy saving and weight reduction, materials used in transportation and aviation industries have further developed in the direction of light weight to achieve high speed, The purpose of high efficiency and energy saving. Hypereutectic Al-Si alloy has many advantages such as small specific gravity, high strength, good wear resistance, good casting molding, high dimensional stability, etc. It has replaced some steel materials under the requirements of energy saving and light weight, and is widely used in aviation. , Aerospace, automobile, machinery manufacturing, shipbuilding and other in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D1/00C22C21/02
Inventor 胡钊华吴国华刘文才丁文江张鹏
Owner SHANGHAI JIAO TONG UNIV
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