A fine-grained aluminum alloy cast slab for extruding thin-walled tubes/sheets and its preparation method
A technology of aluminum alloy and thin-walled tube, which is applied in the field of fine-grained aluminum alloy casting slab and its preparation, can solve the problems of increased production cost and equipment cost, weakening of alloy thermal deformation plasticity, etc., and achieves easy operation, fine and uniform grain size ,Extrusion fluidity good effect
Active Publication Date: 2017-01-18
CHONGQING UNIV
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Grain refinement of as-cast alloys can be obtained by adding grain-refining components to the alloy and increasing the cooling rate during pouring and solidification. However, improper content of alloy components for refining grains will weaken the hot deformation plasticity of the alloy. Excessively high solidification cooling rate means that the production cost and equipment cost of slab preparation will increase
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0032] One, a kind of preparation method for the fine-grained aluminum alloy billet of extrusion thin-walled pipe / sheet, comprises the following steps:
[0033] 1) Ingredients: Industrial pure aluminum with a purity of 99.95wt%, first-grade pure magnesium with a purity of 99.95wt%, Al-Si alloy with a purity of 98.50wt%, 5Ti-0.8B-0.2Er with a purity of 98.85wt% Ingredients are used for raw materials; the 5Ti-0.8B-0.2Er alloy is a metal strip made by melting industrially pure aluminum with the addition of chemical elements Ti, B and Er, wherein the 5Ti-0.8B-0.2Er alloy The mass percentage of the chemical elements Ti, B, Er is 5:0.8:0.2.
[0034]2) Refining: Heat and refine the alloy raw materials prepared in step 1) in a low-carbon steel crucible to melt them completely. When the melt temperature rises to about 720~740°C, stop heating to keep the melt temperature at In the range of 720~740℃, let stand for 15-20 minutes;
[0035] 3) Pouring and solidification: Industrial semi-c...
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 |
|---|---|---|
| thickness | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a fine-grained aluminum alloy casting blank for extruding a thin-wall pipe / thin plate and a preparation method of the fine-grained aluminum alloy casting blank. The method comprises the following steps: casting commercial purity aluminum, first-stage pure magnesium Al-Si alloy and 5Ti-0.8B-0.2Er alloy as raw materials, refining, and casting in an industrial semi-continuous way; further controlling the cooling speed of a casting solidification process at 52-81 DEG C / s, so as to obtain a uniform fine-grained alloy structure, wherein the alloy comprises the following chemical components in percentage by weight: 0.50wt%-0.60wt% of Mg, 0.39wt%-0.45wt% of Si, 0.25wt%-0.55wt% of 5Ti-0.8-B-0.2Er, not more than 0.15wt% of inevitable impurities and the balance of component Al. The method is reasonable in design, convenient to operate and simple in equipment; the prepared casting blank alloy alpha-Al grains are obviously refined; the thermal deformation flow stress is small; and the thin-wall pipe / thin plate which is uniform in thickness, bright in surface and free of a crack can be produced by employing the casting blank.
Description
technical field [0001] The invention belongs to the field of non-ferrous metal casting, and relates to a fine-grained aluminum alloy casting slab for extruding thin-walled tubes / sheets and a preparation method thereof. Background technique [0002] Aluminum alloy materials have been widely used in aviation, aerospace, electronics and other fields. In order to further improve its lightweight effect, on the one hand, it is necessary to continue to develop high-performance alloy varieties to increase the specific strength and specific stiffness of the product; Possibly simple and light. Therefore, in many cases, it is necessary to use high-strength aluminum alloys for extrusion to prepare ultra-thin-walled pipes, including thin-walled round pipes, and various hollow thin-walled profiles. Usually, the thickness of the minimum thin-walled part is 0.1~0.3mm. In addition, the production of narrow thin plates with a thickness of 0.1~0.2mm by extrusion, the cost of casting slab pre...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/03B22D11/22
Inventor 彭建王永建潘复生
Owner CHONGQING UNIV