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Electric field-assisted thermal treatment method of ZrTiAlV alloy sheets

A heat treatment method and alloy plate technology, applied in the field of metal materials, can solve problems such as long heat treatment time, and achieve the effects of short heat treatment time, good comprehensive mechanical properties, and inhibition of grain coarsening

Inactive Publication Date: 2014-12-24
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the 47Zr-45Ti-5Al-3V alloy is generally heat-treated by a commonly used heat treatment furnace, and the heating method is an external heating type, so the heat treatment time of the material is very long, reaching more than 1 hour

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Firstly, the 1mm thick 47Zr-45Ti-5Al-3V alloy sheet was subjected to vacuum hot pressing deformation at 750°C by vacuum hot pressing process, and the deformation amount was 10% of the original thickness of the original sheet. Then put the 47Zr-45Ti-5Al-3V flake alloy plate into a mold made of graphite material, put it on the spark plasma sintering equipment, load the mechanical pressure of 5MPa, use the upper and lower pressure heads and the electrified electrodes, within -2 Under the Pa vacuum state, the pulse current between 0 and 3000A is loaded on the 47Zr-45Ti-5Al-3V alloy plate, the pulse current causes the alloy plate to discharge and heat, and the alloy heats up rapidly to 600°C, and then strictly controls the temperature and keeps it warm for 20 minutes. Finally, power off and cool down to 20°C. The thickness of the treated ZrTiAlV alloy plate is 0.9mm, the yield strength is 1190MPa, the tensile strength is 1270MPa, and the plastic elongation is 7.5%.

Embodiment 2

[0016] Firstly, the 1mm thick 47Zr-45Ti-5Al-3V alloy sheet was subjected to vacuum hot pressing deformation at 750°C by vacuum hot pressing process, and the deformation amount was 10% of the original thickness of the original sheet. Then put the 47Zr-45Ti-5Al-3V flake alloy plate into a mold made of graphite and other materials, put it on the spark plasma sintering equipment, load the mechanical pressure of 5MPa, use the upper and lower pressure heads and the electrified electrodes, in -2 Under the vacuum state of Pa, load the pulse current between 0 and 3000A on the 47Zr-45Ti-5Al-3V alloy plate, the pulse current makes the alloy plate discharge and heat, and the alloy heats up rapidly to 650°C, then strictly control the temperature and keep it warm for 20min , and finally turn off the power and cool down to 20°C. The treated 47Zr-45Ti-5Al-3V alloy is 0.9mm, the yield strength is 1150MPa, the tensile strength is 1352MPa, and the plasticity can reach 10.2%.

Embodiment 3

[0018] Firstly, the 2mm thick 47Zr-45Ti-5Al-3V alloy sheet was subjected to vacuum hot pressing deformation at 750°C by vacuum hot pressing process, and the deformation amount was 10% of the original thickness of the original sheet. Then put the 47Zr-45Ti-5Al-3V flake alloy plate into a mold made of graphite and other materials, put it on the spark plasma sintering equipment, load the mechanical pressure of 5MPa, use the upper and lower pressure heads and the electrified electrodes, in -2 Under the vacuum state of Pa, load the pulse current between 0 and 3000A on the 47Zr-45Ti-5Al-3V alloy plate, the pulse current makes the alloy plate discharge and heat, and the alloy heats up rapidly to 700°C, then strictly control the temperature and keep it warm for 20min , and finally turn off the power and cool down to 20°C. The thickness of the 47Zr-45Ti-5Al-3V alloy plate obtained by this process is 1.8mm, the yield strength is 1116MPa, the tensile strength is 1301MPa, and the elongatio...

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Abstract

The invention relates to an electric field-assisted thermal treatment method of ZrTiAlV alloy sheets. The thermal treatment method mainly comprises the following steps: performing vacuum hotpressing deformation on 47Zr-45Ti-5Al-3V alloy sheets with the thickness of 1-2mm at 750DEG C-800DEG C by adopting a vacuum hot-pressing technology, wherein the deformation quantity is 10-30% of the initial thickness of the original sheets; filling the deformed sheets into a mold made of graphite materials, placing on spark plasma sintering equipment, applying mechanical pressure of 5MPa, loading pulse current onto 47Zr-45Ti-5Al-3V alloy sheets under the vacuum state of less than10<-2> Pa by utilizing a vertical pressure head and an electrified electrode so that the alloy sheets are discharged and heated the temperature of the 47Zr-45Ti-5Al-3V alloy sheets is fast raised to 600-700DEG C, performing heat preservation for 20min and then disconnecting and cooling to 20DEG C. The treated 47Zr-45Ti-5Al-3V alloy sheets have excellent comprehensive mechanical performance, the yielding strength is 1082MPa-1190MPa, the tensile strength is 1220MPa-1352MPa, the elongation after fracture is 7.5%-12.7%, and the applications of the 47Zr-45Ti-5Al-3V alloy in the engineering field can be realized.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a heat treatment method for zirconium alloys. Background technique [0002] Zirconium and zirconium alloys are mainly used in the nuclear industry and the acetic acid industry due to their excellent physical and chemical properties such as good radiation resistance, small neutron absorption cross-sectional area, corrosion resistance and oxidation resistance. At present, the main zirconium alloys are Zr-2, Zr-4, Zr-2.5Nb and so on. Its strength is difficult to meet the strength requirements of structural materials in many fields. ZrTiAlV quaternary alloy is a zirconium alloy with good plasticity and high strength. It is one of the rapidly developing zirconium alloys in the field of structural materials. [0003] Liu Riping, Liang Shunxing and others first synthesized the 47Zr-45Ti-5Al-3V alloy, and conducted in-depth research on the properties of the forged state, annealed state a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F3/00
Inventor 张春祥骆俊廷刘永康刘日平
Owner YANSHAN UNIV
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