Technology for medium-frequency induction furnace to smelt ZL424 and aluminum casting alloy

A technology for casting aluminum alloy, ZL424, applied in the field of casting production process, can solve the problems of unreasonable refining process, easy generation of pores and inclusions in castings, and unclean degassing and slag removal of alloys, so as to improve mechanical properties and reduce metal burning loss. , the effect of improving internal quality

Active Publication Date: 2011-06-29
TIANJIN NAVIGATION INSTR RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unreasonable refining process, the alloy is not clean of degassing and slag removal, and the castings are prone to pores and inclusions.

Method used

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  • Technology for medium-frequency induction furnace to smelt ZL424 and aluminum casting alloy
  • Technology for medium-frequency induction furnace to smelt ZL424 and aluminum casting alloy
  • Technology for medium-frequency induction furnace to smelt ZL424 and aluminum casting alloy

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Embodiment Construction

[0035] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0036] A process for smelting ZL424 cast aluminum alloy in an intermediate frequency induction furnace, the smelting steps are:

[0037] (1) Start-up of the intermediate frequency induction furnace:

[0038] ①. Check the water circuit before starting up:

[0039] Before use, check whether the electrical circuit is in good condition, whether the components are damaged, and whether the contact points are loose and disconnected. If the above situation occurs, it should be used after eliminating the fault.

[0040] Check the waterway, water temperature, and water quality to meet the requirements of the device. The inlet water temperature is +5°C to +40°C, and the inlet water pressure is 1.0kg / cm2 to 2.0kg / cm2. Check whether the joints of the wa...

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Abstract

The invention relates to technology for a medium-frequency induction furnace to smelt ZL424 and aluminum casting alloy. The smelting process comprises the following steps: (1) primary refining: adopting hexachloroethane for primary refining; (2) secondary refining: adopting argon rotary injection for secondary refining; (3) filtering: adding a ceramic filter net between the primary refining and the secondary refining for purification. Alloy liquid is endowed with effects of good gas and slag removal effects, the difficulty that the defects such as easy generation of pin hole, shrinkage and the like are easily generated in the casting of aluminum alloy is solved, the alloy pinhole degree is greatly improved, the inherent quality of castings is improved, and the mechanical properties (such as tensile strength, elongation rate and hardness) can be improved evidently. In the manner of combining the secondary refining and purification process, the integral process is more reasonable, and the quality and the efficiency of aluminum casting alloy are effectively improved.

Description

technical field [0001] The invention belongs to the field of casting production technology, in particular to a technology for melting ZL424 cast aluminum alloy in an intermediate frequency induction furnace. Background technique [0002] ZL424 cast aluminum alloy is an aluminum-zinc-magnesium cast aluminum alloy introduced from the former Soviet Union in the 1960s. This cast aluminum alloy has high mechanical properties, good cutting performance, and good welding performance, especially after a certain Heat treatment specifications can obtain high dimensional stability, so it is suitable for casting materials of high-precision platform structural parts. The key parts of inertial platform products (table body, inner frame, outer frame, base, etc.) are all made of cast aluminum. alloy. However, the cast aluminum alloy has low fluidity, high thermal cracking tendency, high alloy shrinkage rate, and poor casting process, but its sensitivity to thickness is not strong, and it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/03C22C21/10
Inventor 曲嘉吕振玉田洪超孟宇澄蔡智渊尹滦
Owner TIANJIN NAVIGATION INSTR RES INST
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