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Heating treatment technology for aluminum alloy castings

A technology of aluminum alloy castings and preheating, which is applied in the field of metal casting, can solve the problems of not meeting practical needs, insufficient mechanical properties of aluminum alloy castings, and potential safety hazards in impact resistance, and achieves easy promotion and use, and improved mechanical strength , Improve the effect of mechanical properties and impact toughness

Inactive Publication Date: 2018-01-23
和县华顺铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the heat treatment process and the different proportions of the chemical composition elements of conventional aluminum alloys, the mechanical properties of the finished aluminum alloy castings are insufficient, especially in the field of widely used automotive materials, and its impact resistance has potential safety hazards, which cannot meet practical needs. , therefore, need to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A heat treatment process for aluminum alloy castings is carried out according to the following steps:

[0024] (1) Vacuum homogenization preheating treatment: place the cast aluminum alloy casting in a vacuum high-temperature furnace for homogenization preheating treatment for 2.5 hours, the preheating temperature is controlled at 240°C, and the preheating heating rate is set at 10°C / min;

[0025] The above aluminum alloy castings include the following components by weight percentage: C 0.48%, Fe 3.20%, Si 1.45%, Mn3.35%, Cu 2.10%, Mg 1.70%, Zn 2.70%, Ni 0.24%, Ti 0.28%, Sb 0.15%, the balance is Al, and the content of non-removable trace elements is ≤0.01%;

[0026] (2) Primary normalizing: transfer the preheated aluminum alloy castings to the normalizing furnace for primary normalizing treatment, the heating rate of the above normalizing furnace is 15°C / min, and the temperature of the primary normalizing treatment is controlled at 640°C , the holding time is set to ...

Embodiment 2

[0032] A heat treatment process for aluminum alloy castings is carried out according to the following steps:

[0033] (1) Vacuum homogenization preheating treatment: place the cast aluminum alloy casting in a vacuum high-temperature furnace for homogenization preheating treatment for 3 hours, the preheating temperature is controlled at 260°C, and the preheating heating rate is set at 15°C / min ;

[0034] The above aluminum alloy castings include the following components by weight percentage: C 0.60%, Fe 3.60%, Si 1.80%, Mn3.95%, Cu 2.50%, Mg 2.00%, Zn 3.15%, Ni 0.36%, Ti 0.32%, Sb 0.15%, the balance is Al, and the content of non-removable trace elements is ≤0.01%;

[0035] (2) Primary normalizing: transfer the preheated aluminum alloy castings to the normalizing furnace for primary normalizing treatment, the heating rate of the above normalizing furnace is 20°C / min, and the temperature of the primary normalizing treatment is controlled at 650°C , the holding time is set to 1....

Embodiment 3

[0041] A heat treatment process for aluminum alloy castings is carried out according to the following steps:

[0042] (1) Vacuum homogenization preheating treatment: place the cast aluminum alloy castings in a vacuum high-temperature furnace for homogenization preheating treatment for 3.5 hours, the preheating temperature is controlled at 280°C, and the preheating heating rate is set at 15°C / min;

[0043] The above aluminum alloy castings include the following components by weight percentage: C 0.80%, Fe 4.00%, Si 2.00%, Mn4.15%, Cu 2.60%, Mg 2.10%, Zn 3.40%, Ni 0.42%, Ti 0.35%, Sb 0.20%, the balance is Al, and the non-removable trace element content is ≤0.01%;

[0044] (2) Primary normalizing: transfer the preheated aluminum alloy castings to the normalizing furnace for primary normalizing treatment, the heating rate of the above normalizing furnace is 20°C / min, and the temperature of the primary normalizing treatment is controlled at 660°C , the holding time is set to 2h; ...

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Abstract

The invention discloses a heating treatment technology for aluminum alloy castings, and relates to the technical field of metal casting. The heating treatment technology comprises the following stepsthat (1) vacuum homogenization preheating is carried out; (2) first-time normalizing is carried out; (3) second-time normalizing is carried out; (4) high-temperature tempering is carried out; (5) vacuum hardening is carried out; and (6) annealing is carried out. According to the heating treatment technology for the aluminum alloy castings, the heating temperature is appropriately improved for prolonging the soaking time, and therefore structural transformation of the aluminum alloy castings can be sufficient, the mechanical property and the impact toughness are effectively improved, and the heating treatment technology is suitable for application and popularization.

Description

technical field [0001] The invention relates to the technical field of metal casting, in particular to a heat treatment process for aluminum alloy castings. Background technique [0002] As a traditional metal material, cast aluminum alloy is widely used in aerospace, aviation, automobile, machinery and other industries due to its low density and high specific strength. With the development of modern industry and new casting technology, cast aluminum alloy The demand is increasing. At the same time, with the development of high-performance aerospace vehicles, its internal components are also developing in the direction of large size, high precision requirements, complex structures, and high metallurgical mechanical properties. The integration, lightweight, and reliability of various aluminum alloy components put forward higher requirements. Due to the heat treatment process and the different proportions of the chemical composition elements of conventional aluminum alloys, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F1/053C22C21/00C22C21/10C22F1/02
Inventor 刘榄
Owner 和县华顺铸造有限公司
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