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High-strength inflaming retarding pressure casting magnesium alloy and preparing method thereof

A high-strength, magnesium alloy technology, applied in the field of non-ferrous metal materials and metallurgy, can solve the problems of low ignition point, low mechanical properties, manufacturing and use restrictions, etc., achieve good die-casting performance and mechanical properties, low rare earth usage, and reduce production costs Effect

Inactive Publication Date: 2018-08-10
WENXI COUNTY REGAL MAGNESIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, magnesium alloys also have their own limitations, because magnesium has a high heat of oxidation and active chemical properties, and the formed MgO film is loose and porous, easy to oxidize, and has a low ignition point, which brings great challenges to the production, processing and handling of magnesium alloys. Difficult; mechanical properties are relatively low, and are greatly limited in the manufacture and use of important structural parts; magnesium alloys for die-casting, especially in the field of semi-solid die-casting, have relatively few grades, and more stay in the integrity research and actual production of the theoretical system In the stage of technology exploration, specific problems encountered in practical applications need to wait for further solutions, especially in terms of improving the ignition point of magnesium alloys and improving the flame retardancy of alloys while ensuring high mechanical properties and die-casting properties of materials

Method used

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  • High-strength inflaming retarding pressure casting magnesium alloy and preparing method thereof
  • High-strength inflaming retarding pressure casting magnesium alloy and preparing method thereof
  • High-strength inflaming retarding pressure casting magnesium alloy and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Put all the metal magnesium ingots into the crucible and melt at 660 °C under protective gas until completely melted, as the base liquid;

[0023] (2) The magnesium melt was gradually heated from 660 °C to 740 °C, during which time 5.0 wt. % of aluminum, 0.5 wt. % of calcium, 0.45 wt. % of zinc, 0.2 wt. % of yttrium and 0.15 wt.% manganese to obtain magnesium alloy melt;

[0024] (3) Stir the magnesium alloy melt at a temperature of 740 °C for 10 minutes, and add a refining agent during the stirring process for refining; after refining, remove the flux and scum on the liquid surface, and then lightly sprinkle a layer of covering agent ; Stand still, add refining agent for secondary refining, refining temperature is 740 ℃, stir evenly for 20 minutes, extract slag after refining, and remove flux and scum on the liquid surface;

[0025] (4) The magnesium alloy melt was cooled to 690 °C and kept for 20 min;

[0026] (5) Sampling and analysis shows that the composition...

Embodiment 2

[0028] (1) Put all the metal magnesium ingots into the crucible and melt at 660 °C under protective gas until completely melted, as the base liquid;

[0029] (2) Gradually heat the magnesium melt from 660 ℃ to 730 ℃, and gradually add 8.0 wt.% aluminum, 1.0 wt.% calcium, 0.60 wt.% zinc, 0.35 wt.% yttrium at this temperature , 0.35 wt. % manganese, 0.5 wt. % misch to obtain magnesium alloy melt;

[0030] (3) Stir the magnesium alloy melt at a temperature of 730 °C for 10 minutes, and add a refining agent during the stirring process for refining; after refining, remove the flux and scum on the liquid surface, and then lightly sprinkle a layer of covering agent ; Keep the temperature of the melting furnace at 730°C, add refining agent for secondary refining, stir evenly for 25 minutes, extract slag after refining, and remove flux and scum on the liquid surface;

[0031] (4) The magnesium alloy melt was cooled to 675 °C and kept for 25 min;

[0032] (5) Sampling and analysis sho...

Embodiment 3

[0034] (1) Put all the metal magnesium ingots into the crucible, melt at 650 ℃ under protective gas until completely melted, and use it as the base liquid;

[0035] (2) Gradually heat the magnesium melt from 650 ℃ to 710 ℃, and gradually add 9.5 wt.% aluminum, 1.5 wt.% calcium, 0.90 wt.% zinc, 0.5 wt.% % of yttrium, 0.45 wt. % of manganese and 1.0 wt. % of misch to obtain a magnesium alloy melt;

[0036] (3) Stir the magnesium alloy melt at a temperature of 710 °C for 10 minutes, and add a refining agent during the stirring process for refining; after refining, remove the flux and scum on the liquid surface, and then lightly sprinkle a layer of covering agent ; Keep the temperature of the melting furnace at 710°C, add refining agent for secondary refining, stir evenly for 30 minutes, extract slag after refining, and remove flux and scum on the liquid surface;

[0037] (4) The magnesium alloy melt was cooled to 660 °C and kept for 30 min;

[0038] (5) Sampling and analysis show...

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Abstract

The invention discloses a high-strength inflaming retarding pressure casting magnesium alloy. The high-strength inflaming retarding pressure casting magnesium alloy comprises, by weight percent, 4 to10% of Al, 0.20 to 2.0% of Ca, 0.05 to 0.90% of Zn, 0.10 to 0.50% of Y, 0.10 to 0.60% of Mn, 0 to 1.0% of La, Ce, Pr and Nd mixed rare earth, smaller than 0.003% of Fe, and the balance Mg and inevitable impurities. The magnesium alloy has the excellent pressure casting performance and mechanical performance, the tensile strength of a stretching sample reaches 300 MPa, the yield strength is 230 MPa, the ductility is 10%, the ignition point is high, 800 DEG C flame contact combustion is carried out for 180 s, observing is carried out for 60 s, the surface is softened and is not combusted, and noserious oxidation phenomenon exists; the production cost is low, toxicity and radioactivity are avoided, and the alloy can be applied to fields of car light weight, home decoration, 3C products and the like.

Description

technical field [0001] The invention relates to a magnesium alloy material suitable for semi-solid forming, which has excellent mechanical properties and ideal flame-retardant properties, and belongs to the technical field of non-ferrous metal materials and metallurgy. Background technique [0002] Magnesium alloy materials have many excellent characteristics such as low density, high specific strength and specific stiffness, good damping performance, and easy recycling. The magnesium alloy die-casting process is mature, with high production efficiency and greatly reduced costs. At the same time, with the gradual promotion of semi-solid production process and vacuum die-casting in the domestic magnesium alloy market, and the progress of new magnesium alloy material technology, new magnesium alloys for die-casting The material will be more widely used: on the one hand, because of its lighter weight and better heat dissipation performance, it will gradually replace some existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03C22C1/06
CPCC22C23/02C22C1/03C22C1/06
Inventor 闫国庆林毛古李智生马晓虎柴海俊任彦杰
Owner WENXI COUNTY REGAL MAGNESIUM
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