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Process for improving pressure resisting quality of aluminum alloys

A process method and technology of aluminum alloy, applied in the field of aluminum alloy castings, can solve the problems of difficult to achieve sequential solidification, small porosity and pinhole defects, thermal node dispersion, etc.

Active Publication Date: 2020-04-21
INNER MONGOLIA NORTH HEAVY INDS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of product use conditions, the wall thickness difference of castings is large, and the thermal joints are dispersed. At the same time, due to the influence of high-strength aluminum alloy materials, it is difficult to achieve sequential solidification during the solidification process of castings, and small looseness is easy to occur at the connection of casting wall thickness and isolated thermal joints. and pinhole defects
Such casting defects will cause leakage of the box casting during the pressure test after processing

Method used

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  • Process for improving pressure resisting quality of aluminum alloys
  • Process for improving pressure resisting quality of aluminum alloys
  • Process for improving pressure resisting quality of aluminum alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0036] Mix according to the requirements of the ingredients of the infusion solution, stir to make it even and fully wet, and the stirring time is not less than 1 hour.

[0037] See the attachment for the schematic diagram of parts assembly figure 1 , after the casting 1 is finished, install the sealing side plate 2, add an appropriate amount of infiltration fluid 3 that is evenly stirred, install the sealing upper plate 4 on the casting 1, and reserve 2 processing holes on the sealing upper plate 4 to install valves. After the installation of the air inlet pipe 5 and pressure gauge 6 is completed, place the casting 1 on the test bench 7 to ensure that the leakage position 8 is at the deepest point of the liquid surface.

[0038] Fill compressed air through the inlet pipe 5 with a valve to make the inner cavity pressure of the casting 1 reach 0.48-0.50 MPa, close the valve, and maintain the pressure for 1-2 hours according to the degree of leakage. Remove the sealing upper pl...

Embodiment 3

[0041] Take the infiltration process of the reduction box as an example.

[0042] The embodiment is as follows: the raw material of the infiltration fluid is selected with a particle size of 20-25 μm Fe 2 o 3 Powder, 800-mesh glass fiber, water glass with a modulus M=3.1-3.3, and industrial distilled water are mixed according to the requirements of the infiltration fluid composition, stirred to make it even and fully wet, and the stirring time is 1 hour.

[0043] The schematic diagram of the assembly of the parts is shown in the attached figure 1 , after the casting 1 is finished, install the sealing side plate 2, add an appropriate amount of infiltration fluid 3 that is evenly stirred, install the sealing upper plate 4 on the casting 1, and reserve 2 processing holes on the sealing upper plate 4 to install valves. After the installation of the air inlet pipe 5 and pressure gauge 6 is completed, place the casting 1 on the test bench 7 to ensure that the leakage position 8 is...

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Abstract

The invention provides a process for improving pressure resisting quality of aluminum alloys, and belongs to the technical field of aluminum alloy castings. The process for improving the pressure resisting quality of the aluminum alloys can improve the pressure resisting quality of the aluminum alloy castings through a method for treating pressing leakage of the aluminum alloy castings. The process is provided with leakage repair liquid; the leakage repair liquid is gradually permeated into internal looseness and pinholes of castings under positive-pressure condition for segmented heating insulation and cooling of the castings, so that the inner walls of the castings always have a certain temperature gradient, the leakage repair effect of the castings is improved, and the leakage repair liquid is finally condensed and solidified under positive pressure to prevent final pressing leakage phenomenon.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy castings, and in particular uses positive pressure to fill inorganic fillers to repair defects such as small looseness and pinholes inside the casting, strengthen the internal quality of the casting, and improve the pressure resistance of the aluminum casting. Background technique [0002] A certain type of military product is a key scientific research and production project of Inner Mongolia Beizhong Group. There are different types of high-, medium-, low-speed and high-precision transmission box castings. The material is high-strength cast aluminum alloy independently developed by the company. Carry out the air tightness test, the bearing pressure is 0.4MPa. [0003] Due to the limitation of product use conditions, the wall thickness difference of castings is large, and the thermal joints are dispersed. At the same time, due to the influence of high-strength aluminum alloy materials, it i...

Claims

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Application Information

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IPC IPC(8): B22D31/00C04B28/26C09K3/12
CPCB22D31/005C04B28/26C04B2111/00482C04B2111/00663C09K3/12C04B14/308C04B14/42
Inventor 霍志刚张文用许君韩卓孙宁李佳蔚白燕芳陈鑫王卫东裴志义
Owner INNER MONGOLIA NORTH HEAVY INDS GROUP
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