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Heat-resistant high-pressure casting al-si-ni-cu aluminum alloy and preparation method thereof

An al-si-ni-cu, high-pressure casting technology, which is applied in the field of industrial aluminum alloys and manufacturing, can solve problems such as insufficient heat resistance, and achieve the effects of reduced man-hours, stable performance, and low impurity content

Active Publication Date: 2021-04-02
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a heat-resistant high-pressure cast Al-Si-Ni-Cu aluminum alloy and its preparation in order to solve the industrial problem that the application of the existing heat-resistant die-casting aluminum alloy is greatly limited due to the defect of insufficient heat resistance. method to solve the above problems

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  • Heat-resistant high-pressure casting al-si-ni-cu aluminum alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038]A percentage of heat-resistant high pressure casting Al-Si-Ni-Cu aluminum alloy is: according to theoretical ratio, 10.5% Si, 2.0% Ni, 3.0% Cu, 0.05% Mg, 0.1% Cr, 0.01% Sr, 0.1 % Zr, 0.1% Ti, 0.1% V, 0.1% Fe, the margin is Al.

[0039]The preparation method is: S1. The industrial pure aluminum ingot, industrial pure magnesium ingot and Al-Si intermediate alloy ALSI23 are removed from the oxide layer and to dry the heat to 200 ° C; calculate the required raw materials according to the components and stoichiometric ratio of alloy Dosage, preparation; s2. After the highness of the 坩 坩 坩 高 高 熔 熔 熔 熔 成 成 成 成 成 成 锭 成; 锭 锭 锭;;; 成; 锭 锭 锭 锭 锭 锭 锭;; 锭;;; 锭;;;;;;;;;;;;;;;;;;;;;;;;;;;;; The Al-Si intermediate alloy is added 2 times, and the temperature is constant at 720 ° C; S4. After all of the Al-Si intermediate alloy is melted, the temperature rise to 780 ° C, sequentially add Alni10 intermediate alloy, AlCr5 Intermediate alloy, AlSr10 intermediate alloy, Alzr4 intermediate alloy, Alti5 ...

Embodiment 2

[0042]The weight percentage of heat-resistant high pressure casting Al-Si-Ni-Cu aluminum alloy is: according to theoretical ratio, 12.0% Si, 3.0% Ni, 2.4% Cu, 0.2% Mg, 0.3% Cr, 0.04% Sr, 0.2 % Zr, 0.2% Ti, 0.5% Fe, margin is Al.

[0043]The preparation method is: S1. Industrial pure aluminum ingot, industrial pure magnesium ingot and Al-Si intermediate alloy ALSI28 remove the oxide layer and the heat to 200 ° C; calculate the required raw materials according to the components and chemometrics ratio of alloy Dosage, preparation; S2. After the high 20% of the height of the crucible is melted into a molten tank at 710 ° C, the remaining aluminum ingot is added; S3. After the industrial pure aluminum ingot melts, heated to 710 ° C, will The Al-Si intermediate alloy is added 4 times, and the temperature is constant at 710 ° C; S4. After all of the Al-Si intermediate alloy is melted, the temperature is raised to 760 ° C, sequentially add Alni10 intermediate alloy, AlCr5 intermediate alloy, A...

Embodiment 3

[0046]A percentage of heat-resistant high pressure casting Al-Si-Ni-Cu aluminum alloy is: according to theoretical ratio, 11.0% Si, 4.0% Ni, 4.0% Cu, 0.2% Mg, 0.2% Cr, 0.03% Sr, 0.3 % Zr, 0.3% V, 0.4% Fe, margin is Al.

[0047]Its preparation method is: S1. Industrial pure aluminum ingots, industrial pure magnesium ingots and Al-Si intermediate alloy or industrial pure silicon respectively remove the oxide layer and to be intermedial to 200 ° C; according to the components and stoichiometric ratio of alloy, calculate The amount of raw material required, the industrial pure aluminum ingot, which will be 22% of the height of the crucible, is added to the molten tank at 715 ° C, and the remaining industrial pure aluminum ingot is added; S3. After the industrial pure aluminum ingot is melted, heating temperature To 720 ° C, the Al-Si intermediate alloy or industrial pure silicon was added 3 times, and the temperature was kept constant at 720 ° C; S4. After all of the Al-Si intermediate all...

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Abstract

The invention provides a heat-resistant high-pressure casting Al-Si-Ni-Cu aluminum alloy and a preparation method thereof, the aluminum alloy comprises the following elements in percentage by weight:10.5-12.0% of Si, 2.0-5.0% of Ni, 2.0-4.0% of Cu, 0.05-0.2% of Mg, 0.1-0.5% of Cr, 0.01-0.04% of Sr, 0.3-0.6% of M, 0.1-0.5% of Fe and the balance of Al, wherein M is at least two elements of Ti, Zr,and V. The tensile strength of die-casting alloy at room temperature, 350 DEG C instantaneous and 350 thermal insulation is 318-360 MPa, 140-155 MPa and 75-93 MPa, and the elongation is 1.2-2.0%, 5.3-6.3% and 5.8-7.2%; without solution heat treatment, the die-casting alloy can be applied to automotive heat-resistant parts such as pistons so as to meet the needs of automotive lightweight development.

Description

Technical field[0001]The present invention relates to a heat-resistant high pressure casting Al-Si-Ni-Cu aluminum alloy and preparation method, which belongs to industrial aluminum alloy and manufacturing.Background technique[0002]The aluminum alloy has a small density, higher than the strength, and has high corrosion resistance and excellent in conductive thermal conductivity, easy to recover, low temperature performance, and is widely used in transportation, aerospace, electronic appliances and other fields. Pressure casting is a casting method that fills the liquid metal at high speeds into the die-casting model cavity and solidifies the formation of castings under pressure. Demand not only makes the casting have higher strength, dimensional accuracy and surface finish, but also easy to achieve mechanization and automation, high production efficiency, can produce complex thin-walled castings in shape, so in automotive, electronic instruments, telecommunications and other industri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/06C22C1/03B22D17/00
CPCB22D17/00C22C1/026C22C1/03C22C1/06C22C21/02
Inventor 叶兵蒋海燕丁文江
Owner SHANGHAI JIAOTONG UNIV