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Method for preparing intermediate alloy of aluminum, silicon and posphor

A phosphorus master alloy and a technology for master alloys are applied in the field of multi-component Al-Si-P master alloys and their preparation, which can solve the problems of polluted environment, difficult melting, unstable metamorphic effect, etc.

Active Publication Date: 2008-05-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have many disadvantages: the ignition point of red phosphorus is about 240 ° C, and a large amount of toxic P is released during deterioration treatment. 2 o 5 Gas, which seriously pollutes the environment; the metamorphic effect of phosphorus salt is unstable, and there are also environmental pollution problems during use; the phosphorus-copper master alloy has a high density and a high melting point, and it is easy to precipitate after being added to the aluminum alloy melt under the smelting condition of a static furnace , difficult to melt, the effect of modification is unstable, and the copper content in the alloy increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) According to the mass of industrial pure aluminum 72%, Al-5Ti-1C master alloy 5%, Si-15P master alloy 10%, Si-20P-20Ni master alloy 8%, low melting point Cu-20P-15Si master alloy 5% by mass The percentage weighs the raw material.

[0015] (2) Melt pure aluminum to 820-850°C in the melting furnace, add the Al-5Ti-1C master alloy that has been weighed, and stir for 2 minutes; add Si-15P and Si-20Ni-20P master alloy at the same time, and Stir for 15 minutes; finally add the low melting point Cu-20P-15Si master alloy, and stir evenly after the reaction is completed.

[0016] (3) Cast directly into ingots.

[0017] According to the above ratio and process, a multi-element Al-Si-P master alloy with the best composition is obtained, the mass percent of its chemical composition is: phosphorus 3.8-4.1, silicon 13.8-14.5, copper 3.1-3.3, nickel 1.5-1.7, Titanium 0.23-0.27, carbon 0.04-0.06, and the rest are aluminum.

Embodiment 2

[0019] (1) According to the mass of industrial pure aluminum 72%, Al-5Ti-1B master alloy 5%, Si-15P master alloy 10%, Si-20P-20Ni master alloy 8%, low melting point Cu-20P-15Si master alloy 5% by mass The percentage weighs the raw material.

[0020] (2) Melt pure aluminum to 820-850°C in the melting furnace, add the Al-5Ti-1B master alloy that has been weighed, and stir for 2 minutes; add Si-15P and Si-20Ni-20P master alloy at the same time, and Stir for 15 minutes; finally add the low melting point Cu-20P-15Si master alloy, and stir evenly after the reaction is completed.

[0021] (3) Cast directly into ingots.

[0022] The mass percentage of the prepared multi-component Al-Si-P master alloy is: phosphorus 3.8-4.1, silicon 13.8-14.5, copper 3.1-3.3, nickel 1.5-1.7, titanium 0.23-0.27, boron 0.04-0.06, The rest is aluminum.

Embodiment 3

[0024] According to the addition process and smelting method of embodiment 1, the difference is that the raw material proportioning and smelting temperature have changes. The ratio of raw materials is: industrial pure aluminum 52%, Al-5Ti-1C master alloy 9%, Si-15P master alloy 14%, Si-20Ni-20P master alloy 18%, low melting point Cu-20P-15Si master alloy 7% % mass ratio Weigh raw materials. Its melting temperature is: 940-970°C. The mass percentage of the prepared multi-component Al-Si-P master alloy is: phosphorus 7.0-7.2, silicon 23.2-23.8, copper 4.4-4.6, nickel 3.5-37, titanium 0.43-0.46, boron 0.08-0.10, The rest is aluminum.

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Abstract

A process for preparing the Al-Si-P intermediate alloy, which contains proportionaly Al, Si, P, Cu, Ni, Ti, and C or B, includes such steps as proportionally providing industrial pure Al, and the intermediate alloys Si-15P, Si-20Ni-20P, Cu-20P-15Si, and Al-5Ti-1C or Al-5Ti-1B, smelting industrial pure Al, adding Al-5Ti-1C or Al-5Ti-1B, stirring, adding Si-15P and Si-20Ni-20P, stirring, adding Cu-20P-15Si, stirring and casting.

Description

1. Technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a multi-component Al-Si-P master alloy used for refining primary silicon in Al-Si-Cu-Ni piston alloys and a preparation method thereof. 2. Background technology [0002] In industrial production, the method of adding phosphorus is generally used to refine the primary silicon in Al-Si-Cu-Ni piston alloy, mainly in the form of red phosphorus, phosphorus salt or phosphorus-copper master alloy for modification. However, these methods have many disadvantages: the ignition point of red phosphorus is about 240 ° C, and a large amount of toxic P is released during deterioration treatment. 2 o 5 Gas, which seriously pollutes the environment; the metamorphic effect of phosphorus salt is unstable, and there are also environmental pollution problems during use; the phosphorus-copper master alloy has a high density and a high melting point, and it is easy to precipitate after be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/02
Inventor 刘相法刘相俊边秀房
Owner SHANDONG UNIV