Process for smelting and processing Mg-alloy particles used for thixotropic injection moulding

A technology of injection molding and magnesium alloy, which is applied in the field of raw materials for thixotropic injection molding, can solve the problems of not meeting the requirements of thixotropic injection molding process, difficult quantitative control, high impurity content, etc., and achieves easy quantitative control and roughly consistent shape , the effect of uniform particle size

Inactive Publication Date: 2002-11-13
戴建林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The size and shape of chips vary greatly, and the fluidity is poor during the thixotropic injection molding process, so it is not easy to quantitatively control
[0004] In China, crucible furnace is used for smelting, No. 2 flux is refined, cast into magnesium alloy billet, and then milled into irregular flakes, which have high impurity content, which cannot meet the requirements of thixotropic injection molding process. Currently, it is only used for steelmaking deoxidation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the above smelting process will contain MgCl 2 45%, KCl 42%, BaCl 2 8%, CaF 2 Add 5% solid flux into the crucible furnace. The flux accounts for 5% of the weight of the smelted magnesium alloy. After the flux is melted, add industrial pure magnesium ingots. After the magnesium ingots are completely melted, heat up to 800-820°C; It was mixed well and the stirring time was 30 minutes.

[0020] When Fe>0.03 and Ni>0.02 in raw magnesium, it is necessary to add Al-Ti5 master alloy to control the chemical composition of the magnesium alloy and remove Fe and Ni impurities, in which Al is 95% and Ti is 5%. The master alloy accounts for the total magnesium alloy. 0.5-1% of the amount; when Fe>0.05 and Ni>0.02 in the raw magnesium, it is necessary to add Al-Ti5 and Mg-Mn4 in equal amounts, Al is 95%, Ti is 5%, Mg is 96%, Mn is 4 %, the master alloy accounts for 0.7-1.2% of the total magnesium alloy, and the addition of Mg-Mn4 master alloy can remove Fe i...

Embodiment 2

[0029] According to the above smelting process will contain MgCl 2 46%, KCl 43%, BaCl 2 7%, CaF 2 Add 4% solid flux into the crucible furnace. The flux accounts for 8% of the weight of the smelted magnesium alloy. After the flux is melted, add industrial pure magnesium ingots. After the magnesium ingots are completely melted, heat up to 800-820°C; It was mixed well and the stirring time was 30 minutes.

[0030] When Fe>0.03 and Ni>0.02 in raw magnesium, it is necessary to add Al-Ti5 master alloy to control the chemical composition of the magnesium alloy and remove Fe and Ni impurities, in which Al is 95% and Ti is 5%. The master alloy accounts for the total magnesium alloy. 0.8-1.2% of the amount; when Fe>0.05 and Ni>0.02 in the raw magnesium, it is necessary to add Al-Ti5 and Mg-Mn4 in equal amounts, wherein Al is 95%, Ti is 5%, Mg is 96%, and Mn is 4%, the master alloy accounts for 1.2-1.5% of the total magnesium alloy, and the addition of Mg-Mn4 master alloy ca...

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Abstract

A process for smelting and processing the granular Mg alloy used for thixotropic injection formation includes such steps as double refining with the solid flux containing MgCl2, KCl BaCl2 and CaF2 and the argon gas controlling chemical components of Mg alloy by adding Al, Zn and itermediate alloy according to the mark of the smelting Mg alloy, low-pressure semi-conticast under protection of argongas to obtain Mg-alloy rod, granulating by cutting, sieving and magnetic separation to obtain the product. Its advantages are low content of Fe, Ni and Cl impurities, uniform granularity and flowability.

Description

(1) Technical field [0001] The invention belongs to the smelting and processing method of magnesium alloy particles, the raw material for thixotropic injection molding. (2) Background technology [0002] Magnesium alloy particles are a new type of alloy material specially used for thixotropic injection molding machines to produce magnesium alloy products. Thixotropic forming, also known as semi-solid forming, is different from traditional processing methods such as casting, forging and other pressure processing. It uses some special properties of some alloys in semi-solid state to produce a new "near-final forming" process of high-quality, high-strength, high-precision parts. The thixotropic injection molding machine combines the two processes of "partial remelting" and "thixoforming" in semi-solid forming into one, and continuously supplies Magnesium alloy pellets to produce injection molded parts. At present, the United States, Japan, and Taiwan are vigorously developin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/00B22F9/04C22C1/06C22C23/00
Inventor 戴阿赶戴建林卫银贵高峰
Owner 戴建林
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