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Mg-Zn-Zr alloy heat-treatment technology

An alloy and process technology, applied in the field of alloy preparation, to achieve the effect of high temperature compressive strength

Inactive Publication Date: 2014-08-06
LUOYANG NEW FIRE ENERGY SAVING TECH PROMOTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the advent of Mg-Zn-Zr series magnesium alloys and the high-temperature compressive strength still have room for further improvement, the present invention provides a heat treatment process for Mg-Zn-Zr alloys, which can solve the following problems

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specific Embodiment 1

[0009] Specific embodiment 1: The raw materials used in the test are pure magnesium ingots, pure zinc particles, and Mg-30Zr master alloy. The Zn content in the test alloy is 5.5% (mass fraction, the same below), and the Zr content is 0.5%. All raw materials must be dried before loading into the furnace.

[0010] Magnesium alloy melting is carried out in an electromagnetic induction furnace, using SF 6 +CO 2 (volume ratio 1:100) mixed gas protection, using 99.99% high-purity corundum crucible for melting. When the temperature of the alloy liquid reaches 680°C, it is poured into a metal mold (180mm×20mm×150mm) preheated to 150°C. Two heat treatment processes were carried out on the alloy ingot, one is solid solution (380℃×12h water quenching) + aging (190℃×12h out of the furnace and air-cooled); the other is direct aging (170, 190, 210℃ out of the furnace and air-cooled), aging The time is 4, 8, 12, 16, 20, 24, 28h respectively. The tensile test was carried out on Shimadzu...

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Abstract

The invention discloses an Mg-Zn-Zr alloy heat-treatment technology. The Mg-Zn-Zr alloy heat-treatment technology realizes development of an Mg-Zn-Zr magnesium alloy and continued improvement of high-temperature compressive strength of the Mg-Zn-Zr magnesium alloy. The invention provides the Mg-Zn-Zr alloy heat-treatment technology. The Mg-Zn-Zr alloy heat-treatment technology is characterized in that the Mg-Zn-Zr alloy is subjected to direct aging treatment so that alloy compressive strength at a room temperature and a high temperature is improved. The Mg-Zn-Zr alloy obtained by the Mg-Zn-Zr alloy heat-treatment technology satisfies strength requirements. Compared with the alloy prepared by an aging process after solid solution, the Mg-Zn-Zr alloy obtained by the Mg-Zn-Zr alloy heat-treatment technology has higher compressive strength at a room temperature and a high temperature.

Description

technical field [0001] The invention relates to the field of alloy preparation, in particular to a heat treatment process of Mg-Zn-Zr alloy. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and specific stiffness, good formability and thermal conductivity, strong electromagnetic shielding ability, and excellent processability. It is known as the most promising green engineering material. Mg-Zn-Zr series magnesium alloy has very high strength, good plasticity and corrosion resistance. The current treatment process adopts the process of solid solution aging, and the room temperature and high temperature compressive strength of this process still have room for improvement. Contents of the invention [0003] In order to solve the problems of the advent of Mg-Zn-Zr series magnesium alloys and the room for further improvement of high-temperature compressive strength, the present invention provides a heat treatment process f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06
Inventor 薛铁山
Owner LUOYANG NEW FIRE ENERGY SAVING TECH PROMOTION