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A kind of ultra-high-strength and high-modulus soluble mg-y-ni-zr-ca magnesium alloy and its preparation method

An ultra-high-strength, magnesium alloy technology, applied in the field of ultra-high-strength soluble magnesium alloy and its preparation, can solve the problems of low strength and low elastic modulus of soluble magnesium alloy, and achieve improved mechanical properties, easy operation, and accelerated corrosion rate. Effect

Active Publication Date: 2019-03-12
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention will solve the problems of low strength and low elastic modulus in the soluble magnesium alloy prepared by the prior art, and provide a kind of super high strength and high modulus soluble Mg-Y-Ni-Zr-Ca magnesium alloy and its preparation method

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  • A kind of ultra-high-strength and high-modulus soluble mg-y-ni-zr-ca magnesium alloy and its preparation method

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specific Embodiment approach 1

[0018] Embodiment 1: This embodiment is an ultra-high-strength, high-modulus soluble Mg-Y-Ni-Zr-Ca magnesium alloy, which is characterized in that the ultra-high-strength, high-modulus soluble Mg-Y-Ni-Zr-Ca magnesium alloy is pressed The mass fraction is prepared from 2% to 20% Y, 0.5% to 9% Ni, 0.1 to 1% Zr, 0.1 to 1% Ca and the balance is Mg; the ultra-high strength, high modulus and soluble Mg-Y- The tensile strength of the Ni-Zr-Ca magnesium alloy is 410MPa-521MPa, the yield strength is 350MPa-439MPa, and the elastic modulus is 45GPa-55GPa; The corrosion rate of the alloy in 5% NaCl aqueous solution is 90mg·cm -2 d -1 ~300mg·cm -2 d -1 .

[0019] In order to improve the strength of magnesium alloys, Y and Gd are added to magnesium alloys. Y and Gd have excellent solid solution and aging strengthening effects in magnesium, and specific transition group elements (Zn, Cu, Ni, etc.) will form a long-period stacking ordered structure (LPSO), which can further improve the s...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the ultra-high-strength high-modulus soluble Mg-Y-Ni-Zr-Ca magnesium alloy consists of 6.9%Y, 7.1%Ni, 0.3% by mass fraction %Zr, 0.5% Ca and the rest are Mg. Others are the same as the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the ultra-high-strength and high-modulus soluble Mg-Y-Ni-Zr-Ca magnesium alloy consists of 7.2%Y, 2.3%Ni, 0.3% by mass fraction %Zr, 0.6% Ca and the rest are Mg. Others are the same as the first embodiment.

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Abstract

The invention relates to an ultrahigh-strength diffluent magnesium alloy and a preparation method of the ultrahigh-strength diffluent magnesium alloy, in particular to an ultrahigh-strength high-modulus diffluent Mg-Y-Ni-Zr-Ca magnesium alloy and a preparation method of the ultrahigh-strength high-modulus diffluent Mg-Y-Ni-Zr-Ca magnesium alloy. The ultrahigh-strength high-modulus diffluent Mg-Y-Ni-Zr-Ca magnesium alloy and the preparation method aim at solving the problems that by means of the prior art, the prepared diffluent magnesium alloy is low in strength and low in elasticity modulus. The preparation method comprises the steps of firstly, material preparation, secondly, melting, thirdly, ingot casting and forming and fourthly, extrusion and forming, and the ultrahigh-strength high-modulus diffluent Mg-Y-Ni-Zr-Ca magnesium alloy is obtained. The ultrahigh-strength high-modulus diffluent Mg-Y-Ni-Zr-Ca magnesium alloy and the preparation method have the beneficial effects that the corrosion rate of the alloy is controlled by regulating and controlling the content of Y and the content of Ni, refiners of Zr and Ca are compounded and added, the alloy structure is better refined, and the mechanical performance of the alloy is improved. The preparation method is mainly used for preparing the ultrahigh-strength high-modulus diffluent Mg-Y-Ni-Zr-Ca magnesium alloy.

Description

technical field [0001] The invention relates to an ultrahigh-strength soluble magnesium alloy and a preparation method thereof. Background technique [0002] Materials required for hydraulic frac balls in oil and gas extraction need to be strong, lightweight, and dissolve in a controlled manner. At present, hydraulic fracturing balls are often made of resin or aluminum matrix composite materials. Although these two materials can meet the requirements in terms of strength, they need a special corrosive solution to dissolve, and the dissolution rate in water is not easy to control. The density of magnesium is lower than that of aluminum, so it is easy to corrode in water, and the density of corrosion products is low, which will not hinder the progress of subsequent corrosion. It can be said that magnesium alloys have natural advantages over aluminum alloys in terms of light weight and ease of dissolution. However, the strength of ordinary magnesium alloy is not high, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 郑明毅武首中乔晓光
Owner HARBIN INST OF TECH