Mg-Sr alloy with extremely excellent die-casting performance

An alloy and excellent technology, applied in the field of alloys, can solve the problems of low liquid solid phase solidification temperature range, poor recyclability of waste materials and slag materials, and extensive melt treatment process, and achieve low liquid solid phase solidification temperature range. The effect of low inhalation and good fluidity

Inactive Publication Date: 2018-02-23
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnesium-strontium alloy has a low liquid-solid phase solidification temperature range, which can solve the problems of large thermal cracking tendency during casting, obvious casting voids and porosity, extensive melt treatment process, poor quality, large thermal cracking tendency, poor casting performance, and low product yield. Technical problems such as low and high temperature strength, poor reusability of waste materials and slag materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A magnesium-strontium alloy smelted at 710 degrees with excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.2wt.%, Ba: 0.6wt.%, Co: 0.8wt.%, Si: 1.3wt.%, Ge: 0.6wt.%, Gd: 0.1wt .%, Ce: 0.3wt.%, B: 0.4wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 710 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 710 degrees for 10 minutes and cast into the same level equipment as the hot top for semi-continuous casting, and the ingot moving speed is 12m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped magnesium-strontium alloy castings. The final heat treatment process of these castings is: va...

Embodiment 2

[0020] A magnesium-strontium alloy smelted at 740 degrees with excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.4wt.%, Ba: 0.5wt.%, Co: 0.6wt.%, Si: 1.3wt.%, Ge: 0.7wt.%, Gd: 0.1wt .%, Ce: 0.3wt.%, B: 0.4wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 740 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 740 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 13m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped magnesium-strontium alloy castings. The final heat treatment process of these castings...

Embodiment 3

[0022] A magnesium-strontium alloy smelted at 790 degrees with excellent die-casting properties. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.2wt.%, Ba: 0.5wt.%, Co: 0.8wt.%, Si: 1.3wt.%, Ge: 0.7wt.%, Gd: 0.1wt .%, Ce: 0.3wt.%, B: 0.4wt.%, the balance is magnesium. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 790 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 790 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 12m / min. The ingot can be used as a casting raw material for die casting in a subsequent process to prepare complex-shaped magnesium-strontium alloy castings. The final heat treatment process of these castings...

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Abstract

The invention discloses a magnesium-strontium alloy with extremely excellent die-casting performance when smelted between 700-800 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Sr: 1.0‑1.5wt.%, Ba: 0.4‑0.8wt.%, Co: 0.4‑0.9wt.%, Si: 1.2‑1.5wt.%, Ge: 0.6 ‑0.8wt.%, Gd: 0.1‑0.2wt.%, Ce: 0.2‑0.4wt.%, B: 0.3‑0.5wt.%, and the balance is magnesium. The magnesium-strontium alloy material has good casting properties and is suitable for pressure casting of thin-walled parts under a protective atmosphere. It is especially suitable for casting lightweight structural materials that require lightweight features, and has a huge market prospect.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a magnesium-strontium alloy. Background technique [0002] Magnesium alloy has the advantages of low density, good heat dissipation, high specific strength and specific stiffness, good electromagnetic shielding performance and abundant raw materials. It has a long application history in aerospace, automobile and other fields. However, the magnesium alloy has a hcp structure and its plastic deformation ability is poor, which limits its performance and application range to a large extent. After adding strontium to magnesium alloy, its processing performance can be greatly improved. Magnesium-strontium alloys have a series of characteristics that magnesium alloys do not have. High specific strength and specific stiffness; strong resistance to high-energy particle penetration, excellent electromagnetic shielding performance; good low-temperature mechanical properties and cutting per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C23/00C22C1/02C22F1/06C22F1/02
CPCC22C23/06C22C1/02C22C23/00C22F1/02C22F1/06
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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