Electric pulse control method and device for iron phase in iron-rich aluminum-silicon alloy

The technology of an aluminum-silicon alloy and a control method is applied in the field of electric pulse control of the iron phase in the iron-rich aluminum-silicon alloy, which can solve the problems of hot cracking, corrosion of furnace lining and reduction of cutting performance, so as to achieve no environmental pollution, low energy consumption, The effect of increased elongation

Inactive Publication Date: 2017-01-18
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These spherical compounds significantly degrade machinability
Moreover, this Al(FeMn)Si primary phase increases with the increase of Mn content. These complex compounds will cause hot cracking and corrode the furnace lining.

Method used

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  • Electric pulse control method and device for iron phase in iron-rich aluminum-silicon alloy
  • Electric pulse control method and device for iron phase in iron-rich aluminum-silicon alloy
  • Electric pulse control method and device for iron phase in iron-rich aluminum-silicon alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, the iron-rich content of ZL102 is set as 0.8% as an example for demonstration, and the silicon content is 11%.

[0042] First, use a silicon carbide rod well furnace to heat up to 300°C, put the crucible into the furnace for preheating treatment, continue to heat up to 680°C, put 3kg of industrial pure Al (purity 99.999%) into the crucible, add 375g of pure Al after melting Silicon and 24g industrial pure iron (purity 99.999%), treat that all of them are melted and the furnace temperature is raised to 750° C. for insulation.

[0043] Such as figure 1 As shown, connect two pulse electrodes (φ=10mm and length is 500mm) to the electric pulse generator through wires, open the furnace cover, insert the two pulse electrodes into the center of the crucible at 50mm, and pass through 1000V, 8Hz, electric pulse for 30s, Finally, the pulse electrode is taken out, and the iron-rich aluminum-silicon alloy treated with the electric pulse is cast into shape.

[0...

Embodiment 2

[0050] In this embodiment, the iron content is 0.5%, and the silicon content is 9%.

[0051] In step 2, the iron-rich aluminum-silicon alloy melt was heated to 720° C., and the parameters of electric pulse treatment were pulse voltage of 500 V, pulse frequency of 3 Hz, and duration of 10 s. Other equipment, steps and parameters not described in this embodiment are consistent with Embodiment 1.

[0052] In order to compare the properties and properties of the alloys treated by electric pulses, a comparison sample was cast first. The composition of various alloy components, melting and casting process parameters of the iron-rich aluminum-silicon alloy of the comparison sample were all the same as those of this sample. The alloys of the examples are the same, and the only difference between the two is whether electric pulse treatment is used. After testing, compared with the above-mentioned comparative samples, the mechanical properties of the alloy treated by electric pulse in ...

Embodiment 3

[0054] In this embodiment, the iron content is 1.2%, and the silicon content is 13%.

[0055] In step 2, the iron-rich aluminum-silicon alloy melt was heated to 760° C., and the parameters of electric pulse treatment were pulse voltage of 1200 V, pulse frequency of 15 Hz, and duration of 60 s. Other equipment, steps and parameters not described in this embodiment are consistent with Embodiment 1.

[0056] In order to compare the properties and properties of the alloys treated by electric pulses, a comparison sample was cast first. The composition of various alloy components, melting and casting process parameters of the iron-rich aluminum-silicon alloy of the comparison sample were all the same as those of this sample. The alloys of the examples are the same, and the only difference between the two is whether electric pulse treatment is used. After testing, compared with the aforementioned comparative samples, the mechanical properties of the alloy treated with electric pulse...

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Abstract

The invention discloses an electric pulse control method for iron-rich aluminum-silicon alloy iron phases. The method includes the following steps that step1, iron-rich aluminum-silicon alloy is smelted to obtain iron-rich aluminum-silicon alloy melt, wherein the iron content in the iron-rich aluminum-silicon alloy is 0.5-1.2%, and the silicon content is 9-13%; step2, the iron-rich aluminum-silicon alloy melt is heated to 720 DEG C-760 DEG C, and electric pulse equipment is used for performing electric pulse treatment on the iron-rich aluminum-silicon alloy melt, wherein the electric pulse equipment comprises a pair of pulse electrodes which are inserted into the iron-rich aluminum-silicon alloy melt, in the process of electric pulse treatment, the pulse voltage is 500 V-1200 V, the pulse frequency is 3 Hz-15 Hz, and the continuing time is 10s-60s; step3, the iron-rich aluminum-silicon alloy melt which is subjected to the electric pulse treatment in the step2 is formed in a casting mode. Mechanical properties of the alloy treated through the method are greatly improved, the tensile strength is improved by 8-25%, the ductility is improved by 5-14%, and the invention further provides a device used for implementation of the method.

Description

technical field [0001] The invention relates to a method for controlling iron phase in iron-rich aluminum-silicon alloy, in particular to an electric pulse control method for iron phase in iron-rich aluminum-silicon alloy and a device for implementing the method. Background technique [0002] In the production process of cast aluminum alloy, because there are many iron-containing tools, and in the production process, iron tools are inevitably in contact with the molten metal, resulting in a high iron content in the final prepared cast aluminum alloy, sometimes even exceeding a certain level. content of some original ingredients. In addition, as the amount of aluminum increases, more and more waste aluminum will inevitably be remelted repeatedly, and each remelting process will further increase the iron content in the alloy. The solubility of iron element in aluminum is extremely low. If the iron content in aluminum alloy exceeds the iron element that aluminum can dissolve, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/02
Inventor 齐锦刚吴敌陈文王建中赵作福王冰李扬
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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