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Casting method for refining structure of investment casting

A casting and investment technology, applied in casting molding equipment, casting molds, casting mold components, etc., can solve the problems of coarse structure and low mechanical properties of castings, and achieve obvious effects, avoid loosening, and shorten the production cycle of products.

Active Publication Date: 2021-11-05
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a casting method for refining the structure of investment castings, so as to solve the problems of coarse structure and low mechanical properties of castings produced by ordinary investment precision casting

Method used

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  • Casting method for refining structure of investment casting
  • Casting method for refining structure of investment casting
  • Casting method for refining structure of investment casting

Examples

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Embodiment 1

[0035] Taking an investment precision aluminum alloy casting as an example, the grade is ZL107, which specifically includes the following steps:

[0036] S1, prepare the molten mold shell 2 according to the process requirements;

[0037] S2. Heating the molten shell 2 to the preheating temperature and keeping it warm according to the process requirements;

[0038] S3. First cover the bottom of the water-cooled copper mold 4 with quartz sand 3 with a thickness of 30 mm. After the molten mold shell 2 is transferred to the water-cooled copper mold 4, use quartz sand 3 to cover the gap between the molten mold shell 2 and the water-cooled copper mold 4. The gap between them is filled tightly, and the diameter of the cooling water channel of the spiral structure inside the water-cooled copper mold 4 is 15mm;

[0039] S4. Pouring the melted ZL107 aluminum alloy liquid into the molten mold shell 2 according to the process requirements;

[0040] S5. Turn on the switch of the water in...

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Abstract

The invention discloses a casting method for refining the structure of an investment casting. The casting method comprises the following steps: S1, preparing an investment shell (2); S2, heating the investment shell (2) to a preheating temperature and keeping at the same temperature; S3, covering the bottom of a water-cooling copper mold (4) with refractory sand (3), and after the investment shell (2) is transferred into the water-cooling copper mold (4), filling a gap between the investment shell (2) and the water-cooling copper mold (4) with the refractory sand (3); S4, pouring molten alloy liquid into the investment shell (2); S5, turning on a switch of a water inlet (5), adjusting the numerical value of a pressure gauge (6), and cooling the investment shell (2) until the temperature is reduced to the room temperature; and S6, transferring the investment shell (2) out of the water-cooling copper mold (4), cleaning the investment shell (2) and taking out a casting. According to the method, the structure of the precision investment casting is refined and the mechanical property is improved, sequential solidification of the casting can be achieved in a solidification process, and the internal quality of the casting is improved.

Description

technical field [0001] The invention belongs to the technical field of investment precision casting, and in particular relates to a casting method for refining the structure of investment precision castings. Background technique [0002] In the actual production process, the castings produced by the ordinary investment precision casting process often have shortcomings such as coarse structure and low mechanical properties. Sub-rapid solidification is a solidification method between equilibrium solidification and rapid solidification, and its cooling rate is between 10 and 10 3 Between K / s. Sub-rapid solidification can refine alloy grains, reduce the size of the second phase and increase the solid solubility of solute elements in the matrix. [0003] The cooling method of water-cooled copper mold is used to control the solidification process of castings, which can effectively refine the grains of the alloy, reduce the segregation of solute elements, and reduce the subsequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04B22C9/04B22C9/06
CPCB22D27/04B22C9/04B22C9/068B22C9/065Y02P10/20
Inventor 徐信锋王宝兵范李鹏姬艳硕冯港雯顾辉旺杨剑
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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