Low cost creep resistanct magnesium alloy and method for producing the same

A magnesium alloy and creep-resistant technology, which is applied in the field of low-cost creep-resistant magnesium alloy and its preparation, can solve the problems of low creep resistance and the like, and achieve the effect of improving creep resistance.

Active Publication Date: 2008-05-07
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these alloys have a disadvantage, that is, the creep resistance at temperatures above 120°C is extremely low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: AZ91D+0.1%Sr magnesium alloy smelting method for die casting production

[0053] 1. Melting and casting Mg-20%Sr intermediate alloy ingot billet, ingot billet melting and casting comprises the following steps:

[0054] (1), prepare materials by the percentage by weight of the composition of Mg-20%Sr master alloy of the present invention;

[0055] (2) Raise the temperature of the preheating furnace to 160-360°C, and raise the temperature of the melting furnace to 500-700°C, and feed protective gas into the melting furnace;

[0056] (3) In the preheating furnace, the pure magnesium ingot is preheated to 100-360°C, and the pure Sr is preheated to 100-150°C;

[0057] (4) To smelt pure magnesium ingots in a preheated melting furnace, first add preheated pure magnesium ingots that account for 1 / 2 to 1 / 20 of the melting weight of 1 melting furnace into the melting furnace so that it can be protected Under the protection of gas, it is completely melted, and then...

Embodiment 2

[0071] Embodiment 2: AZ91D+5.0%Sr magnesium alloy smelting method for die casting production

[0072] 1. Melting and casting Mg-65%Sr intermediate alloy ingot, the ingot melting and casting comprises the following steps:

[0073] (1), prepare materials by the percentage by weight of the composition of Mg-65%Sr master alloy of the present invention;

[0074] (2) Raise the temperature of the preheating furnace to 160-360°C, and raise the temperature of the melting furnace to 500-700°C, and feed protective gas into the melting furnace;

[0075] (3) In the preheating furnace, the pure magnesium ingot is preheated to 100-360°C, and the pure Sr is preheated to 100-150°C;

[0076] (4) To smelt pure magnesium ingots in a preheated melting furnace, first add preheated pure magnesium ingots that account for 1 / 2 to 1 / 20 of the melting weight of 1 melting furnace into the melting furnace so that it can be protected Under the protection of gas, it is completely melted, and then the rest ...

Embodiment 3

[0090] Embodiment 3: AM60B+2.0%Sr magnesium alloy smelting method for die casting production

[0091] 1. Melting and casting Mg-50% Sr intermediate alloy ingot, the ingot melting and casting includes the following steps:

[0092] (1), prepare materials by the weight percentage of the composition of Mg-50%Sr master alloy of the present invention;

[0093](2) Raise the temperature of the preheating furnace to 160-360°C, and raise the temperature of the melting furnace to 500-700°C, and feed protective gas into the melting furnace;

[0094] (3) In the preheating furnace, the pure magnesium ingot is preheated to 100-360°C, and the pure Sr is preheated to 100-150°C;

[0095] (4) To smelt pure magnesium ingots in a preheated melting furnace, first add preheated pure magnesium ingots that account for 1 / 2 to 1 / 20 of the melting weight of 1 melting furnace into the melting furnace so that it can be protected Under the protection of gas, it is completely melted, and then the rest of t...

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PUM

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Abstract

A low-cost creep-resistant magnesium alloy and its preparation method. The creep-resistant magnesium alloy is formed by adding Mg-Sr master alloy to AZ91D, AM50B or AM60B melt, and die-casting, wherein the Mg-Sr master alloy The added amount of Sr is 0.10-5.0% by weight of the AZ91D, AM50B or AM60B magnesium alloy. The method includes the following process: the first step, melting and casting the Mg-(20-65) wt% Sr master alloy billet; the second step, extruding the Mg-(20-65) wt% Sr master alloy billet into Φ2mm ~Φ60mm wire or rod; the third step is to melt the traditional AZ91D, AM50B or AM60B magnesium alloy, add Mg-(20~65)wt%Sr master alloy to the AZ91D, AM50B or AM60B melt, and die-cast it into an anti- Creep magnesium alloys. The creep resistance of the magnesium alloy at 150°C to 175°C is greatly improved, which can meet the application of the magnesium alloy on important parts such as engine block, automatic transmission, crankcase, gear chamber cover, and oil pan.

Description

technical field [0001] The invention relates to a low-cost creep-resistant magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy has very significant advantages in many occasions due to its low density (it is the smallest density among practical structural metals). Especially in aviation, aerospace, and automobiles, motorcycles, high-speed / light rail trains and other transportation vehicles, it has irreplaceable advantages. The low density of the components can save energy, and it also has the advantage of small inertia in the case of high-speed movement, which has a significant effect on the starting and braking of vehicles. [0003] Traditional magnesium alloys such as AZ91D, AM50B, AM60B, etc. have been widely used, and are still the most widely used magnesium alloys. The outstanding feature of this type of magnesium alloy is its excellent die-casting process performance, which is one of the main reasons for their wide applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03B22D21/04B21C23/01
Inventor 张奎李兴刚罗文米绪军焦红忠熊柏青孙银祥李永军
Owner GRIMAT ENG INST CO LTD
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