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Creep resistance magnesium alloy and preparation method thereof

A magnesium alloy and creep-resistant technology, applied in the field of creep-resistant magnesium alloys and their preparation, and industrial magnesium alloys, can solve the problems of low creep resistance, poor corrosion resistance, low strength, etc., and achieve high corrosion resistance. performance, high temperature creep resistance, high mechanical properties

Active Publication Date: 2007-11-28
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 certain disadvantages, such as very low strength (≤100MPa) at temperatures above 250°C, poor corrosion resistance, and low creep resistance (AZ91D, AM60B)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: 1000 kilograms of Mg-3.5Y-1.5Zr-2Nd-8Gd-0.5Dy magnesium alloy preparation method.

[0025] 1. Melting preparation

[0026] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace to 600-620°C, and pass protective gas (0.2-0.5% SF 6 +N 2 ).

[0027] 2. Preheating of pure magnesium ingot, pure Y ingot, Mg-30Zr master alloy, pure Nd ingot, pure Gd ingot and pure Dy ingot

[0028] Use a preheating furnace to preheat 810 kg of pure magnesium ingots, 35 kg of pure Y ingots, 50 kg of Mg-30Zr intermediate alloys, 20 kg of pure Nd ingots, 80 kg of pure Gd ingots and 5 kg of pure Dy ingots to 260~ 360°C, where pure Y ingots, Mg-30Zr master alloys, pure Nd ingots, pure Gd ingots and pure Dy ingots are all placed in the feeding basket, and put into the preheating furnace together with the feeding basket for preheating. The fe...

Embodiment 2

[0036] Embodiment 2: 1000 kg Mg-6.5Y-0.45Zr-1Nd-1Sm-3.5Gd-0.5Tb magnesium alloy preparation method.

[0037] 1. Melting preparation

[0038]Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace to 600-620°C, and pass protective gas (0.2-0.5% SF 6 +N 2 ).

[0039] 2. Preheating of pure magnesium ingot, pure Y ingot, Mg-30Zr master alloy, pure Nd ingot, pure Sm ingot, pure Gd ingot and Mg-25Tb master alloy

[0040] 845 kg of pure magnesium ingots, 65 kg of pure Y ingots, 15 kg of Mg-30Zr intermediate alloys, 10 kg of pure Nd ingots, 10 kg of pure Sm ingots, 35 kg of pure Gd ingots, 20 kg of Mg- The 25Tb master alloy is preheated to 260-360°C, and the pure Y ingot, Mg-30Zr master alloy, pure Nd ingot, pure Sm ingot, pure Gd ingot and Mg-25Tb master alloy are all placed in the feeding basket, together with the feeding basket Put togethe...

Embodiment 3

[0048] Example 3: Preparation method of 1000 kg Mg-5Y-1Zr-1.5Nd-0.5Sm-5Gd-0.5Ho magnesium alloy.

[0049] 1. Melting preparation

[0050] Turn on the power supply of the preheating furnace and the melting furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace to 600-620°C, and pass protective gas (0.2-0.5% SF 6 +N 2 ).

[0051] 2. Preheating of pure magnesium ingot, pure Y ingot, Mg-25Zr master alloy, pure Nd ingot, pure Sm ingot, pure Gd ingot, Mg-25Ho master alloy

[0052] 820 kg of pure magnesium ingots, 50 kg of pure Y ingots, 40 kg of Mg-25Zr intermediate alloys, 15 kg of pure Nd ingots, 5 kg of pure Sm ingots, 50 kg of pure Gd ingots, 20 kg of Mg- The 25Ho master alloy is preheated to 260-360°C, and the pure Y ingot, Mg-25Zr master alloy, pure Nd ingot, pure Sm ingot, pure Gd ingot, and Mg-25Ho master alloy are placed in the feeding basket together with the feeding basket Place in preheated ov...

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Abstract

A kind of alloy, which is anti-squirming, and the components of it and the weight percent of them is: 1.5-10%Y, 0.15-2.0%Zr, 0.3-2.0%Nd, 2.5-8%Gd, and one kind or several kinds of components among Sm, Dy, Tb, Ho, Er, Tm and Eu is also contained, the other is Mg. the following steps are contained in the method: (1) To prepare material (2) To improve the temperature of warm-up stove and melting stove (3) To warm up the material (4) To melt the purified magnesium ingots in batches (5) To melt the other materials, which has been warmed up, in the Mg solution. (6) To distribute equably the alloy components in the Mg solution. (7) To make into casting ingot, cast, billet, board material, pipe material, model material, stick material, line material and all kinds of forged piece. The Mg alloy can fulfill the need owing a higher mechanics performance and anti-squirming performance under high temperate, and the anti-causticity performance is higher than the Mg in existence.

Description

technical field [0001] The invention relates to a creep-resistant magnesium alloy and a preparation method thereof. It belongs to the category of industrial magnesium alloys. Background technique [0002] At present, with the continuous improvement of energy saving, environmental protection and automobile performance requirements, magnesium alloys have low density, high specific strength and rigidity, good casting performance, especially easy to die-cast, in addition to excellent vibration damping performance and easy recycling. Advantages, the application in the automotive industry is booming. With the continuous expansion of the application of magnesium alloys in automobiles, people are also developing Develop magnesium alloys that meet various requirements, such as high-strength, high-toughness, heat-resistant magnesium alloys, high-temperature creep-resistant, corrosion-resistant magnesium alloys, etc. [0003] Traditional magnesium alloys such as AZ91D, AM60B, AS41, ...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03B22D21/04
CPCC22F1/06C22C23/06
Inventor 张奎李兴刚米绪军熊柏青李永军
Owner GRIMAT ENG INST CO LTD
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