Heat treatment for cylinder block casted with high pressure die-casting

a high-pressure die-casting and heat treatment technology, which is applied in the field of heat treatment of cylinder blocks, can solve the problems of deterioration of stiffness of journal portions, slowing down the overall process, and requiring a large investment cost, so as to improve the strength of cylinder blocks and reduce the weight of cylinder blocks for internal combustion engines

Inactive Publication Date: 2013-06-06
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a heat treatment method for cylinder blocks that improves strength and durability through an optimized solution heat treatment and an aging treatment. This method reduces the weight of the cylinder block for internal combustion engines and can be widely applied to cylinder blocks manufactured by high pressure casting.

Problems solved by technology

However, sand casting is complicated and requires a very large investment cost initially to set up.
Thus, even though its recovery rate is quite high, low pressure casting has quite a long cycle time and thus can slow down the overall process.
Although high pressure processing allows for high productivity, mass production, and reduced weight, internal bubbles deteriorate a journal portion stiffness particularly when a gasoline engine has increased output.
As a result, heat treatment solutions cannot be applied.
That is, when a heat treatment solution is applied to the high pressure casting product, blisters may occurring inside of the product.

Method used

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  • Heat treatment for cylinder block casted with high pressure die-casting
  • Heat treatment for cylinder block casted with high pressure die-casting
  • Heat treatment for cylinder block casted with high pressure die-casting

Examples

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Embodiment Construction

[0019]Hereinafter, referring to the drawings, a heat treatment method of a high pressure casting cylinder block according to an exemplary embodiment of the present invention will be described.

[0020]The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and / or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0021]Unless specifically stat...

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Abstract

Disclosed is a heat treatment method for a cylinder block of an internal combustion engine. More specifically, the method includes heating the cylinder block to a solution heat treatment temperature, processing the cylinder block at the solution heat treatment temperature between 440° C. to 460° C. for one to two hours, quenching the cylinder block and then immediately aging the cylinder block for a predetermined amount of time.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2011-0129698 filed in the Korean Intellectual Property Office on Dec. 6, 2011, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002](a) Field of the Invention[0003]The present invention relates to a cylinder block for an internal combustion engine. More particularly, the present invention relates to a heat treatment method of a high pressure casting.[0004](b) Description of the Related Art[0005]A cylinder block for a vehicle engine is typically manufactured by a sand casting method, a gravity casting method, a low pressure casting method, or a high pressure casting method.[0006]A sand casting methods and gravity casting methods manufacturing a cylinder block that is made of cast iron or an aluminum alloy material typically use pressure from gravity and a feeder. In a sand casting method, the cycle time is ty...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22F1/04
CPCC21D1/18C22C21/00C22F1/04
Inventor MIN, KYUNG HO
Owner HYUNDAI MOTOR CO LTD
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