Low-porosity aluminum-magnesium-calcium rear earth based cellular Al alloy foam and preparation thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of closed-cell foam and porosity, which is applied in the field of foamed aluminum alloy and its preparation, can solve the problems that it is not easy to prepare low-porosity and high-strength foam products, easy to float, break or merge, and high-temperature decomposition speed, etc., to achieve High strength, uniform pore structure and low weight loss
Inactive Publication Date: 2008-06-25
SOUTHEAST UNIV
View PDF0 Cites 15 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, using the existing technology to prepare magnesium-calcium rare earth-based foamed aluminum alloys, titanium hydride is used for foaming, the pyrolysis speed is fast, the bubbles are formed rapidly, and it is easy to float, break or merge, and it is not easy to prepare foam products with low porosity and high strength.
Moreover, the hydrogen gas released by titanium hydride at high temperature is easy to burn, which intensifies the burning loss of magnesium.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] Embodiment 1: A low-porosity aluminum-magnesium-calcium rare earth-based closed-cell foamed aluminum alloy, using calcium carbonate as a foaming agent, and the mass percentage of calcium carbonate in the alloy is 0.5% to 5%. The porosity of the prepared low-porosity Al-Mg-Ca rare-earth-based closed-cell foam aluminum alloy is 40% to 75%, such as 41%, 47%, 52%, 58%, 63%, 69%, and 73%, including aluminum , magnesium, calcium, and rare earth, wherein magnesium accounts for 1% to 11% by mass of the alloy, calcium accounts for 0.5 to 5% by mass of the alloy, rare earth accounts for 0.10% to 1.2% by mass of the alloy, and the rare earth component is cerium , lanthanum, yttrium, praseodymium, scandium or a mixture of two or more of them, if it is a mixture, it can be in any proportion.
Embodiment 2
[0018] Embodiment 2: A method for preparing the aforementioned low-porosity aluminum-magnesium-calcium rare earth-based closed-cell foamed aluminum alloy, comprising the following steps:
[0019] In the first step, pure aluminum (which can be industrial pure aluminum) is heated to melt, and magnesium equivalent to 1% to 11% of the alloy mass is added, for example, it can be selected as: 1.5%, 1.8%, 2.6%, 3.5%, 4.6% %, 5.9%, 6.3%, 6.9%, 7.2%, 7.8%, 8.3%, 8.7%, 9.2%, 9.9%, adding calcium equivalent to 0.5% to 5% of the alloy mass, for example, it can be selected as: 1.5% , 1.8%, 1.9%, 2.6%, 3.5%, 4.6%, the mass percentage of rare earth in the alloy is 0.10% ~ 1.2%, for example, it can be selected as: 0.15%, 0.18%, 0.22%, 0.26%, 0.35%, 0.46% %, 0.55%, 0.67%, 0.73%, 0.79%, 0.85%, 0.92%, 1.03%, 1.15%, 1.19%, let stand for 10-30min. The time can be selected as 8 minutes, 23 minutes, and 28 minutes.
[0020] The second step is to keep the melt temperature at 650°C-690°C. The temper...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
porosity
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a low porosity rate Al-Mg-Ca-rare-earth-based closed-cell foamed aluminum alloy and a preparation method which are a foamed aluminum alloy with good corrosion-resistant performance, high strength, high finished product rate, simple method and low cost and a preparation method. The foamed aluminum alloy takes calcium carbonate as a foaming agent, the porosity rate is between 40 and 75 percent, wherein, the manganese accounts for 1 to 11 percent (mass percentage) of the alloy, the calcium accounts for 0.5 to 5 percent (mass percentage) of the alloy, the rare earth accounts for 0.10 to 1.2 percent (mass percentage) of the alloy. The preparation method is that: the pure aluminum is heated up for melting, the melting body is added with the manganese equivalent to 1 to 11 percent of the mass of the alloy, the calcium equivalent to 0.5 to 5 percent of the mass of the alloy and the rare earth equivalent to 0.10 to 1.2 percent of the mass of the alloy, and kept for 10 to 30 minutes; the temperature of the melting body is ensured between 650 and 690 DEG C, the melting body is stirred for 2 to 12minutes with the speed of between 300 and 600rpm; the calcium carbonate equivalent to 0.5 to 5 percent of the mass of the pure aluminum is added into the melting body to stir so as to make the aluminum alloy melting body to be foamed, the low porosity rate Al-Mg-Ca-rare-earth-based closed-cell foamed aluminum alloy is obtained after cooling.
Description
technical field [0001] The invention relates to a foamed aluminum alloy and a preparation method thereof, in particular to a low-porosity aluminum-magnesium-calcium rare earth-based closed-cell foamed aluminum alloy and a preparation method thereof. Background technique [0002] Al-Mg-Ca rare earth-based foamed aluminum alloy not only has the functions of energy absorption, damping and vibration reduction, sound insulation, heat insulation, electromagnetic shielding and other functions that ordinary foamed aluminum has, but also has excellent corrosion resistance. It is used in aerospace, vehicles , marine industry and other fields have broad application prospects. The low-porosity aluminum-magnesium-calcium rare earth-based closed-cell foamed aluminum alloy has higher strength and has more important uses in high-tech fields. [0003] At present, the inventor has mastered the preparation process of Al-Mg-Ca rare-earth-based aluminum alloy foam, and successfully solved the p...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more