Preparation method of microalloyed ultrahigh-strength magnesium alloy

An ultra-high-strength, micro-alloying technology, used in chemical instruments and methods, mixers, mixers with rotary stirring devices, etc., can solve the problems of high cost, difficulty in matching the strength and plasticity of materials, and improve the strength. , improve stability and uniformity, simple and easy to operate effect

Active Publication Date: 2021-12-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems that the cost of existing magnesium alloy materials is too high, and the material strength and plasticity are difficult to match well, and provides a method for preparing microalloyed ultra-high-strength magnesium alloys

Method used

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  • Preparation method of microalloyed ultrahigh-strength magnesium alloy
  • Preparation method of microalloyed ultrahigh-strength magnesium alloy
  • Preparation method of microalloyed ultrahigh-strength magnesium alloy

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specific Embodiment approach 1

[0039] Specific Embodiment 1: This embodiment is a method for preparing a micro-alloyed ultra-high-strength magnesium alloy, which is specifically carried out according to the following steps:

[0040] 1. Preparation of microalloyed magnesium alloy: place pure magnesium block in a ribbed crucible, cover the top of the ribbed crucible with a cover, place the ribbed crucible in a resistance heating furnace, and place the ribbed crucible under a protective atmosphere The pure magnesium block in the furnace is heated to 720 ℃ ~ 740 ℃. After the pure magnesium is completely melted, the preheated pure Zn particles and the preheated Mg-30Nd master alloy are added to the pure Mg melt, and then the mixed The melt is heated up to 760°C~780°C, the preheated Mg-30Zr master alloy is added to the melt, the inclined blade stirring blade is inserted into the melt and fixed, and multi-field stress coordination is carried out at 760°C~780°C Stir homogeneously for 3min~5min; take out the incline...

specific Embodiment approach 2

[0051] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass fraction of Zn in the as-cast Mg-Zn-Nd-Zr alloy described in step one is 3wt.%, the mass fraction of Nd is 0.3wt .%, the mass fraction of Zr is 0.5wt.%, and the balance is Mg. Others are the same as the first embodiment.

specific Embodiment approach 3

[0052] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the refining agent described in step one is CaF 2 and MgCl 2 A mixture of which CaF 2 The mass fraction of is 5wt.%. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a microalloyed ultrahigh-strength magnesium alloy, and relates to a preparation method of a microalloyed magnesium alloy. The preparation method aims to solve the technical problems that an existing magnesium alloy material is too high in cost, and the strength and plasticity of the material are difficult to match well. In the preparation method, an Nd element is adopted as one of alloying elements of the magnesium alloy, a small quantity of a rare earth element Nd and an alloying element Zr are added into a traditional Mg-Zn binary alloy, after two-stage deformation heat treatment, microalloying is achieved, meanwhile, a good strengthening and toughening effect is achieved, it is ensured that the alloy has high strength and meanwhile still has acceptable plasticity, microalloying can also reduce the defects such as inclusion caused by alloying to the greatest extent, the cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a preparation method of microalloyed magnesium alloy. Background technique [0002] Magnesium alloys have excellent properties of low density, high specific strength and specific stiffness, and have obvious advantages in the application of modern metal lightweight, but poor plasticity and deformation ability limit the wide application of magnesium alloys. In this context, exploring and preparing new alloy components in order to obtain magnesium alloys with excellent comprehensive mechanical properties is the main research direction of current researchers. Studies have shown that the strength and plasticity of magnesium alloys can be effectively improved by adding appropriate alloying elements combined with a reasonable hot deformation process. Zn element can improve the strength, plasticity and creep resistance of the alloy; Zr element can refine the grain, reduce the hot cracking tendency, and improve the mechanical propertie...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/03C22F1/06B21C23/21B01F7/18
CPCC22C23/04C22C1/03C22F1/002C22F1/06B21C23/21
Inventor 聂凯波李玮邓坤坤张晋华
Owner TAIYUAN UNIV OF TECH
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