Method for purifying magnesium alloy melt

A magnesium alloy and melt technology, which is applied in the field of magnesium alloy melt purification, can solve problems such as changes in alloy composition and unsatisfactory removal of inclusions, etc., and achieves the effects of low cost, favorable for popularization and application, and good adaptability.

Inactive Publication Date: 2011-04-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flux protection is easy to bring new impurity elements to the alloy melt; gas protection causes air pollution and the formation of greenhouse gases. What is more serious is that the evaporation of magnesium during the refining process makes the alloy composition deviate from the target composition value, thus affecting the material. At present, the refining flux used to remove inclusions in magnesium alloys is mainly a flux containing chloride salt or fluorine salt. The process of removing slag from the flux is to use the bubble floating process to adhere to the solid inclusions in the

Method used

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  • Method for purifying magnesium alloy melt
  • Method for purifying magnesium alloy melt
  • Method for purifying magnesium alloy melt

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0022] Example 1

[0023] The magnesium alloy to be smelted is AZ91 alloy, the crucible used is iron, the inner diameter is 200mm, the height is 200mm, and the protective gas is argon; the foam ceramic block used is ZrO 2 As the basic material, the size is 160mm×85mm×12mm, the average pore size is 0.8mm, and the porosity is 65%. It is a square structural frame made of heat-resistant steel with an inner size of 155mm×90 mm×15 mm, and the frame is 4mm thick. Heat-resistant steel plate, the width of the frame is 5mm, and the middle is an open structure. The movement of the foam ceramic sheet or block placed in the frame is restricted by the buckle locking mechanism on the frame to prevent the foam ceramic from floating and falling off from the frame; two Pieces of ceramic foam were inserted into two frames painted with CaO coating, and the frame and ceramic foam were preheated at 400℃±20℃ for 30min, and then slowly added together with the frame at a speed of 20mm / s to melt to 750℃ ...

Example Embodiment

[0024] Example 2

[0025] The melting alloy is AM60 alloy, the crucible used is iron, the inner diameter is 150mm, the height is 200mm, and the protective gas is argon; the ceramic block used is based on MgO, the size is 150mm×65mm×10mm, the average pore size is 0.9mm, The rate is 70%. A square structural frame with an inner size of 145mm×70 mm×13 mm made of heat-resistant steel, the frame is made of heat-resistant steel with a thickness of 3mm, the frame width is 5mm, and the middle is an open structure. The foam ceramic sheet or foam placed in the frame The movement of the blocks is restricted by the buckle-type locking mechanism on the frame to prevent the foam ceramics from floating and falling off from the frame; the two foam ceramics are inserted into the two frames painted with CaO paint, and the frame and the foam ceramics are together After preheating at 400℃±20℃ for 50min, and then slowly adding with the frame to the AM60 alloy melt melted to 740℃ at a speed of 30mm / s...

Example Embodiment

[0026] Example 3

[0027] The melting alloy is ZK60 alloy, the crucible used is iron, the inner diameter is 280mm, the height is 300 mm, and the shielding gas is argon; the ceramic block used is based on MgO, and the size is 230mm×125mm×15mm. The average pore size is 0.6mm. The rate is 75%. A square structural frame with an inner size of 225mm×120mm×18mm made of heat-resistant steel, the frame is made of heat-resistant steel plate with a thickness of 5mm, and the width of the frame is 5mm. The two larger sides are crossed with stiffeners. The width is 10mm and the thickness is 3mm. It is welded to the frame. The rest is an open structure. The foam ceramic sheet or block placed in the frame is restricted by the buckle locking mechanism on the frame to prevent the foam ceramic from floating up and out of the frame. Fall off. Two pieces of ceramic foam were inserted into the two frames painted with CaO coating, and the frame and ceramic foam were preheated at 400℃±20℃ for 40min,...

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Abstract

The invention relates to a method for purifying a magnesium alloy melt, in particular to a method for purifying a magnesium alloy melt through porous ceramic in-situ filtration. In the invention, reinforce lamellar or blocky preheated foamed ceramic is reinforced by adopting a framework structure and is moved slowly in the magnesium alloy melt to ensure the full contact between the foamed ceramic and the magnesium alloy melt, and solid inclusions and gas in the magnesium alloy melt are eliminated by virtue of the filtering and adhering properties of the foamed ceramic, therefore, the purification of the magnesium alloy melt is realized. Compared with the traditional adopted purification methods, the method for purifying magnesium alloy melt, provided by the invention, has the advantages of simple technological process, simplicity in operation, good adaptability to different alloys, environment-friendly purification process, and low cost, does not give rise to new pollution and is beneficial to popularization and application. By adopting the purification method, the purification of the magnesium alloy melt can be effectively realized.

Description

Technical field [0001] The present invention involves the method of purification of magnesium alloy melts. Specifically, it involves a method of purifying magnesium alloy melts through porous ceramics in situ. technical background [0002] Magnesium alloy is the lightest metal structure material in industrial applications. It has a higher strength, higher stiffness, low elastic modulus, good resistance to impact, high shock absorption capacity, high size stability, high heat dissipation and electromagnetic shielding, high heat dissipation and electromagnetic shielding, high shielding, high shielding, high shielding, high shielding, high shielding, high shielding, and high electromagnetic shielding.Founding performance and cutting processing performance are good, and there are extensive application prospects in automotive parts, electronic products, optical components, etc.; with the development of energy conservation, emission reduction, and lightweight in automobiles, more and m...

Claims

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Application Information

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IPC IPC(8): C22B9/02C22C1/02C22C23/00
CPCY02P10/20
Inventor 陈刚赵玉涛彭蕾邵阳
Owner JIANGSU UNIV
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