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Calcium-zinc intermediate alloy and preparation method thereof

A master alloy, calcium-zinc technology, which is applied in the field of calcium-zinc master alloy and its preparation, can solve the problems of calcium single substance burning loss and difficult control of alloy composition, and achieve the effects of difficult storage, low cost and simple preparation process

Active Publication Date: 2020-05-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of serious burning loss of calcium elemental substance and difficult control of alloy composition in the prior art, the present invention provides a calcium-zinc master alloy and its preparation method

Method used

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  • Calcium-zinc intermediate alloy and preparation method thereof
  • Calcium-zinc intermediate alloy and preparation method thereof
  • Calcium-zinc intermediate alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the calcium-zinc master alloy, the content of zinc is 50 wt.%, and the content of calcium is 50 wt.%.

[0025] In order to obtain high-performance and high-quality master alloys, the raw materials of the above-mentioned calcium-zinc master alloys include 99.99% pure zinc ingots and 99.99% pure calcium ingots.

[0026] The method for preparing calcium-zinc master alloy provided by the present invention includes the following steps:

[0027] (1) In order to ensure the purity of the alloy composition, the resistance furnace wall is coated with ZnO. ZnO can completely avoid the phenomenon of impure alloy composition caused by the residual elements on the inner wall of the crucible or the addition of iron elements;

[0028] (2) Use 99.99% pure zinc ingots and 99.99% pure calcium ingots as raw materials, and do the ingredients according to the weight percentage provided in the above scheme;

[0029] (3) Put the 99.99% pure zinc ingot into the resistance furnace, spread the solvent o...

Embodiment 2

[0035] In the calcium-zinc master alloy, the content of zinc is 40 wt.%, and the content of calcium is 60 wt.%.

[0036] In order to obtain high-performance and high-quality master alloys, the raw materials of the above-mentioned calcium-zinc master alloys include 99.99% pure zinc ingots and 99.99% pure calcium ingots.

[0037] The method for preparing calcium-zinc master alloy provided by the present invention includes the following steps:

[0038] (1) In order to ensure the purity of the alloy composition, the inner wall of the resistance furnace is coated with ZnO. ZnO can completely avoid the phenomenon of impure alloy composition caused by the residual elements on the inner wall of the crucible or the addition of iron elements;

[0039] (2) Use 99.99% pure zinc ingots and 99.99% pure calcium ingots as raw materials, and do the ingredients according to the weight percentage provided in the above scheme;

[0040] (3) Put the 99.99% pure zinc ingot into the resistance furnace, spread ...

Embodiment 3

[0046] In the calcium-zinc master alloy, the content of zinc is 25 wt.%, and the content of calcium is 75 wt.%.

[0047] In order to obtain high-performance and high-quality master alloys, the raw materials of the above-mentioned calcium-zinc master alloys include 99.99% pure zinc ingots and 99.99% pure calcium ingots.

[0048] The method for preparing calcium-zinc master alloy provided by the present invention includes the following steps:

[0049] (1) In order to ensure the purity of the alloy composition, the crucible is filled with ZnO. ZnO can completely avoid the impure phenomenon of the alloy composition caused by the residual elements on the inner wall of the crucible or the addition of iron elements;

[0050] (2) Use 99.99% pure zinc ingots and 99.99% pure calcium ingots as raw materials, and do the ingredients according to the weight percentage provided in the above scheme;

[0051] (3) Put the 99.99% pure zinc ingot into the resistance furnace, spread the solvent on the upper...

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Abstract

The invention discloses a calcium-zinc intermediate alloy and a preparation method thereof. The calcium-zinc intermediate alloy has the zinc content of 25-50 wt.% and the calcium content of 50-75 wt.%. According to the calcium-zinc intermediate alloy, pure zinc ingots and pure calcium ingots are used as raw materials, the pure zinc ingots are placed in a resistance furnace, a solvent is paved on the upper part of the pure zinc ingots, the temperature is raised to 600 DEG C for melting, and zinc liquid is isolated from air; and then the pure calcium ingots are added by adopting a bottom settling method, heated to be molten under 580 DEG C, and subjected to standing, casting, cooling and storing. Through the selection of a formula and the smelting process, the phenomena of low melting point,easy combustion, easy burning loss and difficult preservation of calcium simple substances are effectively reduced, so that the phenomena of difficult control over product component content due to burning loss and low yield of products caused by inflammability are greatly reduced when the alloy is smelted in the later period, the oxygen absorption rate of calcium elements can be reduced, the yield of alloy smelting in the later period is guaranteed, and the quality of castings is improved.

Description

Technical field [0001] The invention belongs to the field of alloy intermediates, and relates to a calcium-zinc intermediate alloy and a preparation method thereof. Background technique [0002] With the increasing development of science and technology, the requirements for the composition, mechanical properties and thermophysical properties of magnesium alloy products have become increasingly strict. The magnesium alloy processing industry needs to have a certain guarantee for the qualified rate, composition content and comprehensive performance of magnesium alloy finished products. In order to solve the smelting problems such as burning loss, difficulty in adding high melting point alloys, difficult control of element content and flammability of alloy elements, on the basis of not affecting raw materials, alloy elements are generally added in the form of alloys made of simple substances. For example: Mg and Zr are generally added in the form of Mg-30wt.% Zr to solve the proble...

Claims

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Application Information

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IPC IPC(8): C22C24/00C22C1/02C22C1/06B22D21/02C22C1/03
CPCC22C24/00C22C1/02C22C1/06B22D21/02C22C1/03
Inventor 房大庆吕文雪刘佳南郭利君丁向东孙军
Owner XI AN JIAOTONG UNIV
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