CN102676858B - Preparation method of high density boral metal matrix composite material - Google Patents
Preparation method of high density boral metal matrix composite material Download PDFInfo
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- CN102676858B CN102676858B CN201210155440.5A CN201210155440A CN102676858B CN 102676858 B CN102676858 B CN 102676858B CN 201210155440 A CN201210155440 A CN 201210155440A CN 102676858 B CN102676858 B CN 102676858B
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Abstract
The invention provides a preparation method of a high density boral metal matrix composite material. The method comprises the following steps of: mixing B4C powder and Al alloy powder according to the predetermined chemical proportion, and uniformly dispersing the B4C particles in the Al alloy matrix; pressing the mixture into a core blank with density of 70-95% TD to form a core blank of homogeneous blank; and sintering the core blank in an aluminum alloy frame, and carrying out hot rolling on the sintered core blank; carrying out 90-degree reversing rolling when the density of the core blank reaches 70-95% TD; and then carrying out cold roll straightening. Compared with the prior art, the preparation method provided by the invention has a simple technological process; the high density composite material formed by uniformly dispersing the B4C powder in the aluminum matrix has better property, wherein the content of B4C is as high as 65% by weight; and the high density boral metal matrix composite material can be used as a neutron absorption material for critical safety control of a spent fuel transportation and storage system, and the intensive storage of the spent fuel is realized.
Description
Technical field
The invention belongs to a kind of preparation technology of matrix material, be specifically related to blank rolling and prepare high desnity metal based composites B
4the method of C-Al neutron absorber plate.
Background technology
Boral metal matrix composite sheet is composited in alloy matrix aluminum by norbide even dispersion, and wherein norbide is dispersion-strengthened phase, and aluminium alloy is matrix phase.This material contains neutron-absorbing boron of good performance, can be used as neutron absorber material.Its remarkable advantage is that corrosion-resistant, resistance to irradiation, Boron contents are high, long service life, as spent fuel neutron absorber material, can improve economy and the security of spent fuel storing.
Norbide content can up to 65wt%, and according to design needs, the adjustable extent of norbide content is very wide, makes the design of spent fuel transport and storage system more flexible, can realize the more intensive storage of spent fuel.
At present, the preparation method of this material mainly contains metallurgical press-working method and powder metallurgy press-working method.Powder metallurgy press-working method can improve the distributing homogeneity of norbide greatly.
The Chinese patent being 200910263588.9 as application number is exactly a kind of powder metallurgy press-working method, it is described that " a kind of spent fuel storing B
4the preparation method of C-Al neutron absorber plate ", the method is contained in aluminium alloy box by pressed compact to be rolled, blank and aluminium alloy box metallurgical binding in the operation of rolling, forms B
4c even dispersion is in alloy matrix aluminum and be surrounded by the matrix material of a kind of sandwich structure of aluminium alloy involucrum, and namely the method can only prepare B
4c even dispersion at the material of the Sandwich biscuit type of Al alloy substrate China and foreign countries alclad alloy cladding, and can not be prepared and not have the better high density boral metal matrix composite material of aluminium alloy involucrum, performance.
Summary of the invention
The object of the invention is to: provide a kind of by B
4c powder even dispersion forms the preparation method of high density boral metal matrix composite material in Al matrix.
Technical scheme of the present invention is as follows:
A preparation method for high density boral metal matrix composite material, step is as follows:
Step one batch mixing: by the B of massfraction 10 ~ 65wt%, granularity 20 ~ 40 μm
4al powdered alloy Homogeneous phase mixing in mixer of C powder and massfraction 35 ~ 90wt%, granularity 10 ~ 20 μm;
Step 2 core base is suppressed: by the B mixed
4c Al alloy powder, is pressed into the core base that density is 70 ~ 85%TD;
Step 3 core base sinters: the core base loading aluminum alloy frame after compacting is placed on vacuum sintering furnace and carries out vacuum sintering, the vacuum tightness in maintenance vacuum sintering furnace is 10
-2~ 10
-4pa, sintering temperature is 400 DEG C ~ 540 DEG C, and sintering time is 2 ~ 18 hours;
Step 4 is rolled into plate: the core base taken out after sintering carries out multiple tracks hot rolling at 400 DEG C ~ 530 DEG C temperature, every time deflection of core base rolling is 20% ~ 40%, when core base density reaches 80 ~ 95%TD, carry out 90 ° of commutation rollings, obtain the sheet material of predetermined thickness dimension;
The cold rolling aligning of step 5; Sheet material after hot rolling is carried out cold rolling, aligns after anneal, obtain the smooth sheet material that density is 99.00 ~ 99.20%TD.
Effect of the present invention is: compared with prior art, and preparation method's technological process of the present invention is simple, B
4c powder even dispersion in the high density composite more excellent performance of aluminium base middle formation, wherein B
4c content is up to 65wt%, and the neutron absorber material that the criticality safety that can be used as spent fuel transport and storage system controls, realizes the intensive storage of spent fuel.
Embodiment
Method of the present invention is placed in aluminium alloy frame by pressed compact to be rolled, and do not have the shell of aluminium alloy, and that finally formed is B
4the homogeneous composite material that C powder even dispersion is formed in alloy matrix aluminum.
Preparation method of the present invention is by B according to predetermined proportion
4c powder and Al powdered alloy Homogeneous phase mixing in mixer; By the B mixed
4c Al alloy powder is pressed into the core base with certain density; Again the core base after compacting is arranged on and is placed in vacuum sintering furnace in previously prepared aluminum alloy frame and carries out vacuum sintering; Carry out hot rolling after sintering, after the density that core base reaches certain, then carry out 90 ° of commutation rollings and obtain hot rolled plate, then the sheet material after hot rolling is carried out cold rolling, align after anneal, obtain the sheet material of predetermined density.
Concrete steps are as follows:
Step one batch mixing: by the B of massfraction 10 ~ 65wt%, granularity 20 ~ 40 μm
4al powdered alloy Homogeneous phase mixing in mixer of C powder and massfraction 35 ~ 90wt%, granularity 10 ~ 20 μm;
Step 2 core base is suppressed: by the B mixed
4c Al alloy powder, is pressed into the core base that density is 70 ~ 85%TD;
Step 3 core base sinters: the core base loading aluminum alloy frame after compacting is placed on vacuum sintering furnace and carries out vacuum sintering, the vacuum tightness in maintenance vacuum sintering furnace is 10
-2~ 10
-4pa, sintering temperature is 400 DEG C ~ 540 DEG C, and sintering time is 2 ~ 18 hours;
Step 4 is rolled into plate: the core base taken out after sintering carries out multiple tracks hot rolling at 400 DEG C ~ 530 DEG C temperature, every time deflection of core base rolling is 20% ~ 40%, when core base density reaches 80 ~ 95%TD, carry out 90 ° of commutation rollings, obtain the sheet material of predetermined thickness dimension;
The cold rolling aligning of step 5; Sheet material after hot rolling is carried out cold rolling, aligns after anneal, obtain the smooth sheet material that density is 99.00 ~ 99.20%TD.
Below in conjunction with embodiment, the invention will be further described:
embodiment 1
Step one batch mixing: by the B of massfraction 10wt%, mean particle size 20 μm
4al powdered alloy Homogeneous phase mixing in mixer of C powder and massfraction 90wt%, mean particle size 10 μm;
Step 2 core base is suppressed: by the B mixed
4c Al alloy powder is pressed into core base, core base density 70%;
Step 3 core base sinters: the core base loading aluminum alloy frame after compacting is built in vacuum sintering furnace and carries out vacuum sintering, the vacuum tightness in maintenance vacuum sintering furnace is 10
-2pa, sintering temperature is 400 DEG C, and sintering time is 18 hours;
Step 4 is rolled into plate: the core base after sintering is carried out hot rolling at 400 DEG C of temperature, and core base rolling pass deflection is 20%, when core base density reaches 80%TD, carries out 90 ° of commutation rollings, obtains the sheet material of predetermined thickness dimension;
The cold rolling aligning of step 5; Sheet material after hot rolling is carried out cold rolling, aligns after anneal, obtain the smooth sheet material that density is 99.20%TD.
Under above-mentioned preparation condition, the tensile mechanical properties of sheet material is as shown in table 1:
Table 1 panel density is the tensile mechanical properties of 99.20%TD
| Sample | Yield strength Rp0.2 /MPa | Tension is strong Rm/MPa | Unit elongation A/% |
| Al+10%B 4C | 121 | 151 | 1.2 |
Above-mentioned yield strength is the parameter starting plastic deformation; Above-mentioned tension is by force the parameter that plastic deformation terminates neutron absorber plate fracture, and unit elongation is the ratio of maximum length and original length before the fracture of this neutron absorber plate.
embodiment 2
Step one batch mixing: by the B of massfraction 30wt%, mean particle size 40 μm
4al powdered alloy Homogeneous phase mixing in mixer of C powder and massfraction 70wt%, mean particle size 20 μm;
Step 2 core base is suppressed: the Al alloy powder mixed is pressed into core base, core base density 80%;
Step 3 core base sinters: the core base loading aluminum alloy frame after compacting is built in vacuum sintering furnace and carries out vacuum sintering, the vacuum tightness in maintenance vacuum sintering furnace is 10
-3pa, sintering temperature is 470 DEG C, is sintered to 10 hours time;
Step 4 is rolled into plate: the core base after sintering is carried out hot rolling at 500 DEG C of temperature, and core base rolling pass deflection is 35%, carries out 90 ° of commutation rollings, obtain the sheet material of predetermined thickness dimension when core base density reaches 85%TD;
The cold rolling aligning of step 5; Sheet material after hot rolling is carried out cold rolling, aligns after anneal, obtain the smooth sheet material that density is 99.10%TD.
Under above-mentioned preparation condition, the tensile mechanical properties of sheet material is as shown in table 2:
Table 2 panel density is the tensile mechanical properties of 99.10%TD
| Sample | Yield strength Rp0.2 /MPa | Tension is strong Rm/MPa | Unit elongation A/% |
| Al+30%B 4C | 128 | 166 | 1.5 |
embodiment 3
Step one batch mixing: by the B of massfraction 65wt%, mean particle size 40 μm
4al powdered alloy Homogeneous phase mixing in mixer of C powder and massfraction 35wt%, mean particle size 10 μm;
Step 2 core base is suppressed: the Al alloy powder mixed is pressed into core base, core base density 85%;
Step 3 core base sinters: the core base loading aluminum alloy frame after compacting is built in vacuum sintering furnace and carries out vacuum sintering, the vacuum tightness in maintenance vacuum sintering furnace is 10
-4pa, sintering temperature is 540 DEG C, is sintered to time 2 h;
Step 4 is rolled into plate: the core base after sintering is carried out hot rolling at 530 DEG C of temperature, and core base rolling pass deflection is 40%, carries out 90 ° of commutation rollings, obtain the sheet material of predetermined thickness dimension when core base density reaches 95%TD;
The cold rolling aligning of step 5; Sheet material after hot rolling is carried out cold rolling, aligns after anneal, obtain the smooth sheet material that density is 99.00%TD.
Under above-mentioned preparation condition, the tensile mechanical properties of sheet material is as shown in table 3:
Table 3 panel density is the tensile mechanical properties of 99.00%TD
| Sample | Yield strength Rp0.2 /MPa | Tension is strong Rm/MPa | Unit elongation A/% |
| Al+45%B 4C | 136 | 178 | 2.5 |
Claims (1)
1. a preparation method for high density boral metal matrix composite material, step is as follows:
Step one batch mixing: by the B of massfraction 10 ~ 65wt%, granularity 20 ~ 40 μm
4al powdered alloy Homogeneous phase mixing in mixer of C powder and massfraction 35 ~ 90wt%, granularity 10 ~ 20 μm;
Step 2 core base is suppressed: by the B mixed
4c Al alloy powder, is pressed into the core base that density is 70 ~ 85%TD;
Step 3 core base sinters: the core base loading aluminum alloy frame after compacting is placed on vacuum sintering furnace and carries out vacuum sintering, the vacuum tightness in maintenance vacuum sintering furnace is 10
-2~ 10
-4pa, sintering temperature is 400 DEG C ~ 540 DEG C, and sintering time is 2 ~ 18 hours;
Step 4 is rolled into plate: the core base taken out after sintering carries out multiple tracks hot rolling at 400 DEG C ~ 530 DEG C temperature, every time deflection of core base rolling is 20% ~ 40%, when core base density reaches 80 ~ 95%TD, carry out 90 ° of commutation rollings, obtain the sheet material of predetermined thickness dimension;
The cold rolling aligning of step 5; Sheet material after hot rolling is carried out cold rolling, aligns after anneal, obtain the smooth sheet material that density is 99.00 ~ 99.20%TD.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103614584A (en) * | 2013-11-07 | 2014-03-05 | 海龙核材科技（江苏）有限公司 | Preparation method of aluminium matrix composite with high B4C content |
| KR20160122137A (en) * | 2014-02-13 | 2016-10-21 | 세라딘, 인크. | Method of making a metal matrix composite material |
| CN104308161B (en) * | 2014-10-16 | 2017-02-01 | 中国工程物理研究院材料研究所 | Preparation method of boron carbide/aluminum composite board |
| CN104952500B (en) * | 2015-07-09 | 2017-05-03 | 中国核动力研究设计院 | Uranium-molybdenum alloy dispersion fuel plate manufacturing method |
| CN108735322B (en) * | 2018-06-04 | 2024-02-09 | 江苏核电有限公司 | Stainless steel boron aluminum composite board and manufacturing method |
| CN108735318B (en) * | 2018-06-04 | 2024-02-09 | 江苏核电有限公司 | Stainless steel boron aluminum composite board for PWR fuel assembly storage cell and manufacturing method |
| CN109825743A (en) * | 2019-03-20 | 2019-05-31 | 中国工程物理研究院材料研究所 | A kind of application method of structure-function integration neutron absorber material |
| CN114453586B (en) * | 2022-03-04 | 2023-07-04 | 中国核动力研究设计院 | Preparation method of tungsten-boron-aluminum composite shielding plate with high tungsten content |
| CN116497250B (en) * | 2023-06-27 | 2023-10-27 | 有研工程技术研究院有限公司 | High-modulus aluminum-based composite foil and preparation method thereof |
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| US5980602A (en) * | 1994-01-19 | 1999-11-09 | Alyn Corporation | Metal matrix composite |
| CN101090788A (en) * | 2004-12-28 | 2007-12-19 | 日本轻金属株式会社 | Method for producing aluminum composite material |
| CN102094132A (en) * | 2010-12-28 | 2011-06-15 | 中国工程物理研究院核物理与化学研究所 | Method for preparing B4C-Al composite material |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5980602A (en) * | 1994-01-19 | 1999-11-09 | Alyn Corporation | Metal matrix composite |
| CN101090788A (en) * | 2004-12-28 | 2007-12-19 | 日本轻金属株式会社 | Method for producing aluminum composite material |
| CN102094132A (en) * | 2010-12-28 | 2011-06-15 | 中国工程物理研究院核物理与化学研究所 | Method for preparing B4C-Al composite material |
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Inventor after: Sun Changlong Inventor after: Liu Xiaozhen Inventor after: Liu Yunming Inventor after: Wang Meiling Inventor after: Li Gang Inventor after: Wu Songling Inventor after: Yi Wei Inventor after: Zou Congpei Inventor before: Sun Changlong Inventor before: Liu Yunming Inventor before: Liu Xiaozhen |