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High-performance aluminum alloy engine cylinder head and casting method thereof

An engine cylinder head, aluminum alloy technology, applied in engine components, machines/engines, cylinder heads, etc., can solve the problems of poor casting performance, long slag processing process, insufficient mechanical properties, etc.

Active Publication Date: 2021-06-04
GUILIN UNIV OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the three major problems of iron increase, oxidation and gas absorption in the aluminum alloy casting process, the existing aluminum alloy cylinder head materials generally have relatively low strength at high temperatures (the instantaneous tensile strength above 250°C is less than 200MPa, and the continuous strength Less than 100Mpa), poor casting performance, low casting pass rate, poor reusability of waste materials and slag, resulting in poor quality, perishable, high cost, and long slag treatment process of casting products including automobile engine cylinder heads
Moreover, although the traditional grades of aluminum-silicon alloys can already meet the requirements of use in terms of general performance, there are often many shortcomings when the parts are in a complex stress state.
Such as poor high temperature resistance, insufficient mechanical properties, etc.

Method used

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  • High-performance aluminum alloy engine cylinder head and casting method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The chemical composition of the high-performance aluminum alloy engine cylinder head is as follows by mass percentage:

[0026] Si:8.0%, Ni:2.0%, Cu:0.5%, Mg:0.3%, Zn:0.2%, Zr:0.1%, Sc:0.1%, La:0.1%, Sb:0.1%, Mn≤0.3%, Fe≤0.2%, Ti≤0.2%, individual content of other impurity elements≤0.05%, total content of other impurity elements≤0.15%, and the balance is Al.

[0027] Its casting method is:

[0028] (1) Smelting: first put aluminum ingots and high-purity silicon into the melting furnace according to the formula ratio, and then add other alloy components in turn for alloying. After complete melting, carry out on-line degassing and slag removal treatment on the aluminum alloy melt to obtain aluminum alloy solution;

[0029] The online degassing is degassing by using argon and chlorine mixed gas, the flow rate is 0.2m 3 / h, the flow ratio of argon and chlorine is 1:0.4, the partial pressure is 0.10MPa, and the rotor speed is 400rpm / min.

[0030] (2) Modification treatmen...

Embodiment 2

[0039] The chemical composition of the high-performance aluminum alloy engine cylinder head is as follows by mass percentage:

[0040] Si:8.5%, Ni:3.0%, Cu:1.8%, Mg:0.8%, Zn:0.4%, Zr:0.25%, Sc:0.15%, La:0.18%, Sb:0.18%, Mn≤0.3%, Fe≤0.2%, Ti≤0.2%, individual content of other impurity elements≤0.05%, total content of other impurity elements≤0.15%, and the balance is Al.

[0041] Its casting method is:

[0042] (1) Smelting: first put aluminum ingots and high-purity silicon into the melting furnace according to the formula ratio, and then add other alloy components in turn for alloying. After complete melting, carry out on-line degassing and slag removal treatment on the aluminum alloy melt to obtain aluminum alloy solution;

[0043] The online degassing is degassing by using argon and chlorine mixed gas with a flow rate of 0.3 m 3 / h, the flow ratio of argon and chlorine is 1:0.4, the partial pressure is 0.2MPa, and the rotor speed is 450rpm / min.

[0044] (2) Modification tr...

Embodiment 3

[0052] The chemical composition of the high-performance aluminum alloy engine cylinder head is as follows by mass percentage:

[0053] Si: 9.5%, Ni: 3.5%, Cu: 2.0%, Mg: 1.0%, Zn: 0.5%, Zr: 0.3%, Sc: 0.25%, La: 0.2%, Sb: 0.2%, Mn≤0.3%, Fe≤0.2%, Ti≤0.2%, individual content of other impurity elements≤0.05%, total content of other impurity elements≤0.15%, and the balance is Al.

[0054] Its casting method is:

[0055] (1) Smelting: first put aluminum ingots and high-purity silicon into the melting furnace according to the formula ratio, and then add other alloy components in turn for alloying. After complete melting, carry out on-line degassing and slag removal treatment on the aluminum alloy melt to obtain aluminum alloy solution;

[0056] The online degassing is degassing by using argon and chlorine mixed gas, the flow rate is 0.4m 3 / h, the flow ratio of argon and chlorine is 1:0.4, the partial pressure is 0.40MPa, and the rotor speed is 500rpm / min.

[0057] (2) Modificatio...

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Abstract

The invention relates to a high-performance aluminum alloy engine cylinder head and its casting method, which is characterized in that its chemical components are: Si: 8.0-9.5%, Ni: 2.0-3.5%, Cu: 0.5-2.0% by mass percentage , Mg:0.3-1.0%, Zn:0.2-0.5%, Zr:0.1-0.3%, Sc:0.1-0.25%, La:0.1-0.2%, Sb:0.1-0.2%, Mn≤0.3%, Fe≤ 0.2%, Ti≤0.2%, the single content of other impurity elements≤0.05%, the total content of other impurity elements≤0.15%, and the balance is Al; , homogenization, cutting and face milling, hot rolling, intermediate annealing, cold rolling and solution treatment; the high-performance aluminum alloy engine cylinder head of the present invention improves the durability of the aluminum alloy engine cylinder head through alloy strengthening, metamorphic treatment and heat treatment. Comprehensive properties such as high temperature performance and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a high-performance aluminum alloy engine cylinder head and a casting method thereof. Background technique [0002] While the automobile industry is booming all over the world, it also brings two serious social problems of environmental pollution and energy shortage. This prompts the automotive industry to focus on energy and environmental protection for sustainable development, and the advanced automotive material technology dominated by automotive lightweight is an important guarantee to achieve this goal. Therefore, lightweight has become the main direction of future automotive technology development. Automobile materials are an important factor affecting the weight of automobiles, and have a considerable impact on energy saving and pollution improvement. In the immature development of new energy technology, vehicle weight reduction is undoubtedly the best wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04B22D18/04C21D9/00C22B9/04C22B9/05C22C1/03C22C1/06C22F1/043F02F1/24
CPCB22D18/04C21D9/0068C22B9/006C22B9/04C22B9/05C22C1/026C22C1/03C22C1/06C22C21/04C22F1/043F02F1/24F02F2200/06
Inventor 陈元华王丽凤
Owner GUILIN UNIV OF AEROSPACE TECH
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