CN104233143A - Electric field-assisted thermal treatment method of ZrTiAlV alloy sheets - Google Patents
Electric field-assisted thermal treatment method of ZrTiAlV alloy sheets Download PDFInfo
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- CN104233143A CN104233143A CN201410424020.1A CN201410424020A CN104233143A CN 104233143 A CN104233143 A CN 104233143A CN 201410424020 A CN201410424020 A CN 201410424020A CN 104233143 A CN104233143 A CN 104233143A
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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
The invention belongs to metal material field, particularly a kind of heat treating method of zirconium alloy.
Background technology
Zirconium and it's alloy owing to having good anti-radiation performance, neutron-absorption cross-section amasss the excellent physicochemical property such as little, corrosion-resistant and anti-oxidant, be mainly used in nuclear industry and acetic acid industry.Zirconium alloy main at present has Zr-2, Zr-4, Zr-2.5Nb etc.Its intensity is all difficult to the requirement of strength reaching structured material in a lot of field.ZrTiAlV quad alloy is the zirconium alloy of the alloy system with better plasticity, has higher intensity simultaneously, is structured material Material Field development one of zirconium alloy kind comparatively rapidly.
First Liu Ping, Liang Shunxing etc. have synthesized 47Zr-45Ti-5Al-3V alloy, and conduct in-depth research the performance after forging state, annealed state and solution treatment, determine under various regimes, the basic mechanical performance that material possesses and microtexture.Current 47Zr-45Ti-5Al-3V alloy is generally adopt conventional heat treatment furnace to heat-treat, and type of heating is external-heat, and therefore the heat treatment time of material is very long, reach more than 1 hour.
Summary of the invention
The object of this invention is to provide the 47Zr-45Ti-5Al-3V sheet alloy electric field-assisted heat treating method that a kind of heat treatment time is short, can improve zirconium alloy comprehensive mechanical property.The present invention mainly comprises vacuum hotpressing distortion and electric field-assisted thermal treatment.
Technical scheme of the present invention is as follows:
(1) adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 750 DEG C ~ 800 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 1 ~ 2mm is thick, deflection is 10 ~ 30% of original plate original depth;
(2) in the mould that the sheet material loading graphite material after step (1) being out of shape is made, be placed on discharge plasma sintering (Spark Plasma Sintering, be called for short SPS) on equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current on 47Zr-45Ti-5Al-3V sheet alloy, make its rapid temperature increases to 600 ~ 700 DEG C, after insulation 20min, power-off is cooled to 20 DEG C.
The present invention compared with prior art tool has the following advantages:
1, adopt forge hot to reduce alloy grain size, reach the effect of preliminary grain refining;
2, the feature of discharge plasma sintering process low voltage, high electric current can change the weave construction of 47Zr-45Ti-5Al-3V alloy; Under pulsed current effect, rapidly, heat treatment time is short, obviously can suppress grain coarsening in heating;
3, carry out in vacuum environment, 47Zr-45Ti-5Al-3V alloy can be prevented oxidized;
4, forge its yield strength of 47Zr-45Ti-5Al-3V alloy of state, tensile strength and elongation after fracture before thermal treatment and be respectively 1289MPa, 1348MPa and 5%.47Zr-45Ti-5Al-3V alloy after process has good comprehensive mechanical property, yield strength is between 1082MPa ~ 1190MPa, and between its tensile strength 1220MPa ~ 1352MPa, elongation after fracture, between 7.5% ~ 12.7%, can realize the application of 47Zr-45Ti-5Al-3V alloy at engineering field.
Embodiment
Embodiment 1:
First adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 750 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 1mm is thick, deflection is 10% of original plate original depth.Then, in mould 47Zr-45Ti-5Al-3V sheet alloy sheet material loading graphite material made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under Pa vacuum state, be loaded into by pulsed current between 0 ~ 3000A on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, alloy rapid temperature increases to 600 DEG C, strict temperature control be incubated 20min afterwards, last power-off is cooled to 20 DEG C.ZrTiAlV sheet alloy thickness after process is 0.9mm, yield strength 1190MPa, tensile strength 1270MPa, and plastic elongation rate is 7.5%
Embodiment 2:
First adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 750 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 1mm is thick, deflection is 10% of original plate original depth.Then, in the mould materials such as 47Zr-45Ti-5Al-3V sheet alloy sheet material loading graphite made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current between 0 ~ 3000A on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, alloy rapid temperature increases to 650 DEG C, strict temperature control be incubated 20min afterwards, last power-off is cooled to 20 DEG C.47Zr-45Ti-5Al-3V alloy after process is 0.9mm, yield strength 1150MPa, tensile strength 1352MPa, and plasticity can reach 10.2%
Embodiment 3:
First adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 750 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 2mm is thick, deflection is 10% of original plate original depth.Then, in the mould materials such as 47Zr-45Ti-5Al-3V sheet alloy sheet material loading graphite made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current between 0 ~ 3000A on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, alloy rapid temperature increases to 700 DEG C, strict temperature control be incubated 20min afterwards, last power-off is cooled to 20 DEG C.The 47Zr-45Ti-5Al-3V sheet alloy thickness that this technique obtains is 1.8mm, and yield strength is 1116MPa, and tensile strength is 1301MPa, and unit elongation reaches 11.5%.
Embodiment 4:
First adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 800 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 1mm is thick, deflection is 30% of original plate original depth.Then, in the mould materials such as 47Zr-45Ti-5Al-3V sheet alloy sheet material loading graphite made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current between 0 ~ 3000A on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, alloy rapid temperature increases to 600 DEG C, strict temperature control be incubated 20min afterwards, last power-off is cooled to 20 DEG C.47Zr-45Ti-5Al-3V sheet alloy thickness after process is 0.7mm, and yield strength is 1120MPa, and tensile strength is 1240MPa, and unit elongation reaches 8.7%.
Embodiment 5:
First adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 800 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 2mm is thick, deflection is 30% of original plate original depth.Then, in the mould materials such as 47Zr-45Ti-5Al-3V sheet alloy sheet material loading graphite made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current between 0 ~ 3000A on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, alloy rapid temperature increases to 650 DEG C, strict temperature control be incubated 20min afterwards, last power-off is cooled to 20 DEG C.47Zr-45Ti-5Al-3V sheet alloy thickness after process is 1.4mm, and yield strength is 1105MPa, and tensile strength is 1290MPa, and unit elongation reaches 10.8%.
Embodiment 6:
First adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 800 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 2mm is thick, deflection is 30% of original plate original depth.Then, in the mould materials such as 47Zr-45Ti-5Al-3V sheet alloy sheet material loading graphite made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current between 0 ~ 3000A on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, alloy rapid temperature increases to 700 DEG C, strict temperature control be incubated 20min afterwards, last power-off is cooled to 20 DEG C.47Zr-45Ti-5Al-3V sheet alloy thickness after process is 1.4mm, and yield strength is 1082MPa, and tensile strength is 1220MPa, and unit elongation reaches 12.7%.
Claims (1)
1. a ZrTiAlV sheet alloy electric field-assisted heat treating method, is characterized in that:
(1) adopt vacuum hot-pressing process to carry out vacuum hotpressing distortion at 750 DEG C ~ 800 DEG C to the 47Zr-45Ti-5Al-3V sheet alloy that 1 ~ 2mm is thick, deflection is 10 ~ 30% of original plate original depth;
(2), in the mould that the sheet material loading graphite material after step (1) being out of shape is made, be placed on discharging plasma sintering equipment, load the mechanical pressure of 5MPa, push-down head and powered electrode in utilization, at <10
-2under the vacuum state of Pa, be loaded into by pulsed current on 47Zr-45Ti-5Al-3V sheet alloy, pulsed current makes sheet alloy electric discharge heating, makes its rapid temperature increases to 600 ~ 700 DEG C, and after insulation 20min, power-off is cooled to 20 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296903A (en) * | 2015-10-29 | 2016-02-03 | 燕山大学 | High-pressure twisting-electric field assistant thermal treatment fine grain method for ZrTiAlV alloy |
| CN106925648A (en) * | 2017-04-18 | 2017-07-07 | 燕山大学 | A kind of electric field-assisted high pressure torsion device and high pressure torsion method |
| CN107764664A (en) * | 2017-10-09 | 2018-03-06 | 燕山大学 | A kind of electric field-assisted high pressure torsion testing machine |
| CN110129701A (en) * | 2019-06-24 | 2019-08-16 | 合肥工业大学 | A kind of method of refractory metal recrystallization annealing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602840A (en) * | 2013-11-05 | 2014-02-26 | 燕山大学 | Preparation method of titanium zirconium base alloy |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602840A (en) * | 2013-11-05 | 2014-02-26 | 燕山大学 | Preparation method of titanium zirconium base alloy |
Non-Patent Citations (1)
| Title |
|---|
| YUANBIAO TAN ET AL.: "On the Phenomenon of Stress Drop During Hot Deformation of ZrTiAlV Alloy", 《METALLURGICAL AND MATERIALS TRANSACTIONS A》, vol. 44, 28 September 2013 (2013-09-28), pages 5284 - 5288 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296903A (en) * | 2015-10-29 | 2016-02-03 | 燕山大学 | High-pressure twisting-electric field assistant thermal treatment fine grain method for ZrTiAlV alloy |
| CN106925648A (en) * | 2017-04-18 | 2017-07-07 | 燕山大学 | A kind of electric field-assisted high pressure torsion device and high pressure torsion method |
| CN106925648B (en) * | 2017-04-18 | 2018-09-04 | 燕山大学 | A kind of electric field-assisted high pressure torsion device and high pressure torsion method |
| CN107764664A (en) * | 2017-10-09 | 2018-03-06 | 燕山大学 | A kind of electric field-assisted high pressure torsion testing machine |
| CN110129701A (en) * | 2019-06-24 | 2019-08-16 | 合肥工业大学 | A kind of method of refractory metal recrystallization annealing |
| CN110129701B (en) * | 2019-06-24 | 2021-05-04 | 合肥工业大学 | Method for recrystallization annealing of refractory metal |
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