Method for providing magnesium alloys with superplastic properties
OwnerUlrich Draugelates, Antonia Schram +2inventors
InventorsUlrich Draugelates, Antonia Schram, Claus-Christian Kedenburg, Talant Ryspaev
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Abstract
The invention relates to a method for producing magnesium alloys with a superplastic structure using a deformation process, followed by quick cooling. The magnesium-based alloy is initially pre-heated to a temperature of 340-380° C. and is subsequently deformed. The semi-finished product thus obtained is cooled down at high speed to an ambient temperature immediately after deformation.
Claims12
A method for producing magnesium alloys with a superplastic microstructure, which comprises the following steps:
- a) Heating a magnesium-based alloy to a temperature of 250 to 600° C.,
- b) working the cooled alloy to form a semifinished product at a temperature of 250 to 450° C.,
- c) immediately and rapidly cooling the semifinished product using cooling rates of greater than 300° C./min.
A method for producing magnesium alloys having a superplastic microstructure, which comprises the following steps:
- f) Heating a magnesium-based alloy to a temperature of 300 to 550° C. and holding this temperature for 1 to 100 hours,
- g) cooling the heated alloy to a temperature of 0 to 100° C.,
- h) reheating the cooled alloy to a temperature of 200 to 400° C. and holding this temperature for 1 to 100 hours,
- i) cooling the reheated alloy in air to a temperature of 0 to 100° C.,
- j) working the cooled alloy to form a semifinished product at a temperature of 250 to 450° C.
The method as claimed in one of the preceding claims, characterized in that the magnesium-based alloy in addition to magnesium also contains aluminum, zinc, manganese, silicon, copper, zirconium, silver and/or rare earths.
The method as claimed in one of the preceding claims, characterized in that the alloy is worked by extrusion.
Dependencies are inferred from the claim text.