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Preparation method of thick and large-section aluminum alloy casting

A technology for aluminum alloy castings and large sections, which is used in casting molding equipment, metal processing equipment, casting molds, etc. Improved mechanical strength, reduced air pockets, and reduced processing man-hours

Pending Publication Date: 2021-10-01
安徽古月机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the precision of aluminum alloy castings with thick and large sections is still not up to the ideal level, so users still need to reserve some processing capacity for the next process. The metal coating used in the casting process is not ideal, and air pockets are prone to appear on the surface of the castings.

Method used

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  • Preparation method of thick and large-section aluminum alloy casting
  • Preparation method of thick and large-section aluminum alloy casting
  • Preparation method of thick and large-section aluminum alloy casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing aluminum alloy castings with thick and large cross-sections. The preparation method includes the following steps: a mold preheating process; a metal paint spraying process; a casting process; and a molding and core pulling process.

[0020] The mold reservation process is as follows: the mold is preheated to 180°C for 2 hours, and then cooled to 80-90°C.

[0021] The casting process is as follows: the mold sprayed by the metal paint spraying process is heated to 210°C, the pouring temperature is 710°C, and when the furnace temperature is higher than 730°C, the casting starts after standing still.

Embodiment 2

[0023] A method for preparing aluminum alloy castings with thick and large cross-sections. The preparation method includes the following steps: a mold preheating process; a metal paint spraying process; a casting process; and a molding and core pulling process.

[0024] The mold reservation process is as follows: the mold is preheated to 200°C for 1 hour, and then cooled to 80-90°C.

[0025] The casting process is as follows: the mold sprayed by the metal paint spraying process is heated to 230°C, the pouring temperature is 720°C, and when the furnace temperature is higher than 730°C, the casting starts after standing.

Embodiment 3

[0027] A method for preparing aluminum alloy castings with thick and large cross-sections. The preparation method includes the following steps: a mold preheating process; a metal paint spraying process; a casting process; and a molding and core pulling process.

[0028] The mold presetting process is as follows: the mold is preheated to 220°C for 1 hour, then cooled to 80-90°C.

[0029] The casting process is as follows: the mold sprayed by the metal paint spraying process is heated to 250°C, the pouring temperature is 730°C, and when the furnace temperature is higher than 730°C, the casting starts after standing.

[0030] Embodiment 1, 2, 3 Casting reduces processing man-hours by 70-80%, and improves mechanical strength by 20-25%.

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Abstract

The invention discloses a preparation method of a thick and large-section aluminum alloy casting. The preparation method comprises the following steps that a mold preheating procedure is conducted; a metal coating spraying process is conducted; a casting process is conducted; and a forming and core pulling process is conducted. Compared with the prior art, the machining time of the thick and large-section aluminum alloy casting is reduced by 70%-80%, and the mechanical strength is improved by 20%-25%. Thus, the purposes of greatly reducing the manufacturing cost and improving the product performance of a user are achieved, the gas generation amount of a used coating is reduced from 30 g / ml to 25 g / ml, and air pockets on the surface of a casting are obviously reduced.

Description

technical field [0001] The invention belongs to the preparation method of metal castings, in particular to the technical field of the preparation method of aluminum alloy castings. Background technique [0002] In the non-ferrous metal casting process, the castings produced by metal casting have higher mechanical properties than sand castings: the same alloy can increase its tensile strength by an average of 25%, and its yield strength can increase by an average of 20%. It is also significantly improved; the precision and surface finish of castings are higher than those of sand castings, and the quality and size are stable; in addition, the process yield of castings is high, and the consumption of liquid metal is reduced, which can generally save 15-30%; Using sand can generally save 80-100% of molding materials; in addition, the production efficiency of metal mold casting is high; the causes of casting defects are reduced; the process is simple, and it is easy to realize me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04B22D27/04B22D27/20B22C3/00
CPCB22D21/04B22D27/04B22D27/20B22C3/00
Inventor 胡志强
Owner 安徽古月机械制造有限公司
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