CN100460544C - Deformed Al-Mn series alloy and preparing process thereof - Google Patents
Deformed Al-Mn series alloy and preparing process thereof Download PDFInfo
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- CN100460544C CN100460544C CNB2005100180575A CN200510018057A CN100460544C CN 100460544 C CN100460544 C CN 100460544C CN B2005100180575 A CNB2005100180575 A CN B2005100180575A CN 200510018057 A CN200510018057 A CN 200510018057A CN 100460544 C CN100460544 C CN 100460544C
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Abstract
A deformable Al-Mn alloy contains Si (0-0.6%), Fe (0-0.7%), Cu (0-0.3%), Mn (0.3-1.6%), Mg (0-1.3%), Ti (0.005-0.15%), RE (0-0.4%), B (0-0.03%), impurities (0-0.7%) and Al (rest). Its preparing process includes such steps as smelting fine-crystal Al ingot, adding others, smelting Al-Mn alloy, and pressure machining.
Description
Affiliated technical field
The invention belongs to aluminium alloy and make the field, be specifically related to a kind of deformed Al-Mn series alloy and manufacture method made from fine grained aluminium ingot thereof.
Background technology
Al-Mn series alloy belongs to the aluminium alloy that thermal treatment can not be strengthened, its outstanding characteristics are that density is low, anti-corrosion, conduction, good heat conductivity, and have good reflectivity, non magnetic, good welding property and processibility, be widely used in all respects such as heat exchange material, sensitive materials, finishing material, welding material, packing and container.
In the Al-Mn series alloy fusion process, carry out grain refining by interpolation Al-Ti, Al-Ti-B master alloy usually.Al-Ti, Al-Ti-B master alloy normally by aluminium and fluorine-containing hydrochlorate (as potassium fluotitanate K
2TiF
6With potassium fluoborate KBF
4) reaction prepare, environmental pollution is serious; Or adopt mixing the method preparation by fine aluminium and pure titanium, this can consume the insufficient pure metallic titanium of a large amount of China production capacity.Above method manufacturing process complexity, cost is higher.Al in Al-Ti, the Al-Ti-B master alloy
3Ti phase, TiB
2In the process of setting of aluminium liquid, serve as heterogeneous forming core core, cause grain refining.Al in the master alloy
3Ti compares big and skewness, TiB
2Easily assemble mutually, influence is to the thinning effect of Al-Mn series alloy.
Fine grained aluminium ingot is under the constant condition of Aluminum Electrolysis Production facility and production technique, and by add a certain proportion of titanium oxide in ionogen, the massfraction that utilizes the titanium that aluminium-titanium eutectoid principle produces is the aluminium ingot of 0.01-0.20% grain refining.Producing with electrolytic process in the process of fine grained aluminium ingot, titanium is present in the negative electrode aluminium liquid with the form of atom, because titanium content is low, and aluminium liquid is among the motion that does not stop stirs by magnetic field that Faradaic current produces and the effect of anodic gas ebullient, and titanium elements is evenly distributed.Therefore, Al in the fine grained aluminium ingot
3Ti is tiny, even, and is stronger to the grain refining capability of aluminium alloy.Deformed Al-Mn series alloy with fine grained aluminium ingot is made can not add or add less the master alloy grain-refining agent, and obtains excellent more thinning effect.
Add in aluminium alloy that rare earth element can purify, reinforcement and refinement alloy matrix aluminum.In titaniferous aluminium alloy, add boron, significantly the crystal grain of refinement aluminium alloy.Therefore, add titanium, add rare earth element based on fine grained aluminium ingot, with certain Ti/B than adding B element melting deformed Al-Mn series alloy, comprehensive fine grained aluminium ingot, rare earth element, boron obtains better refinement and strengthening effect to the advantage of alloy over-all properties influence.
Application number provides a kind of no oil smoke non-stick cooker and manufacture method thereof for 03117068.4 patent application.This no oil smoke non-stick cooker material therefor is a kind of Si that contains, Fe, and Mn, the aluminium alloy of Ti, wherein Si is 0.2%, and Fe is 0.5%, and Mn is 1%, and Ti is 0.05%.This alloying constituent is identical with alumal of the present invention, but does not contain RE and B, and whether the not mentioned alloy of this invention adopts the fine grained aluminium ingot manufacturing.
Summary of the invention
The objective of the invention is problem at existing deformed Al-Mn series alloy crystal fining method existence, the deformed Al-Mn series alloy of a kind of Si of containing, Fe, Cu, Mn, Mg, Ti, rare earth and B element is provided, a kind of method for preparing this alloy is provided simultaneously, promptly by in fine grained aluminium ingot, adding Si, Fe, Cu, Mn, Mg, rare earth and B element, make alloy casting state crystal grain of the present invention tiny evenly, over-all properties improves, and production cost reduces.
Technical scheme of the present invention is as follows.
A kind of deformed Al-Mn series alloy, the massfraction of its each element is:
Si ≤0.6％
Fe 0.32—0.7％
Cu ≤0.30％
Mn 0.30—1.6％
Mg ≤1.3％
Ti 0.005—0.03％
Rare earth≤0.40%
B ≤0.03％
Impurity≤0.7%
Surplus is an aluminium.
Wherein:
The massfraction of Ti is preferred 0.01-0.03%,
The massfraction of rare earth is preferred 0.20-0.30%,
The massfraction preferred 0.001-0.01% of B.
Prepare the method for above-mentioned described deformed Al-Mn series alloy, it is characterized in that: by in fine grained aluminium ingot, adding Si, Fe, Cu, Mn, Mg, rare earth, the B element is made, and may further comprise the steps:
A. add the pure Al of required quality in the fine grained aluminium ingot melt, stir, the massfraction that makes the melt titanium is 0.005-0.15%,
B. add Si, Fe, Cu, Mn, Mg, rare earth, B by above-mentioned given massfraction, the interpolation of each element does not have strict order,
C. temperature is 720-760 ℃, and to melt jet at least initial refining agent or gas 10-30min, blowing gas is nitrogen or argon gas,
D. bath composition is analyzed, product titaniferous amount is regulated by replenish titanium and fine aluminium to melt,
E.690-735 ℃ cast promptly gets the Al-Mn series alloy ingot,
Gained aluminium-Mn series alloy ingot promptly gets target product after press working,
Above-mentioned b, c, d step do not have strict sequencing.
Wherein:
The fine grained aluminium ingot melt melts the titaniferous melt that forms for titaniferous melt or the fine grained aluminium ingot that directly goes out electrolyzer;
Bath composition is analyzed, by replenish the concrete grammar that titanium and fine aluminium regulate product titaniferous amount to melt be:, then add in aluminium titanium master alloy grain-refining agent, titanium additives, potassium fluotitanate, Al-Ti-B intermediate alloy grain-refining agent, the titanium boron additive one or more and replenish if the titaniferous amount is lower than product titaniferous amount target value; If be higher than product titanium content target value, then add fine aluminium and dilute.
Compared with prior art, the invention has the advantages that:
1, the deformed Al-Mn series alloy of fine grained aluminium ingot manufacturing is owing to its fine grained aluminium ingot titanium alloying manner, low production cost;
2, uniting of fine grained aluminium ingot, rare earth, B adds alloy casting state just of the present invention and organizes crystal grain tiny evenly, the precipitated phase refinement, and intensity improves.
Embodiment
Below in conjunction with embodiment the present invention is further described, but is not limited to the following example.
Embodiment 1
The massfraction of choosing Ti is that 0.10% fine grained aluminium ingot is the feedstock production deformed Al-Mn series alloy, and the massfraction of Ti is 0.05% in the target product.
The ratio of the massfraction 0.2% of Si in the product according to target, pure silicon is positioned in the smelting furnace, is preheating to 500 ℃, add the fine grained aluminium ingot melt that directly goes out electrolyzer then, and adding the fine aluminium (as Al 99.70A) of required quality, the massfraction that makes melt Ti is 0.05%;
Adopt secondary spray refining agent, the molten aluminium temperature is reduced to 760 ℃, the 15min that jets for the first time, and blowing gas is a nitrogen, used refining agent is the wrought aluminium alloy refining agent of buying from solvent factory;
Add the ferro-aluminum master alloy, the massfraction that makes Fe is 0.50%;
Add the aluminum bronze master alloy, the massfraction that makes Cu is 0.10%;
Add aluminium manganese master alloy, the massfraction that makes Mn is 1.0%;
Bath composition is analyzed,, added AlTi5 master alloy grain-refining agent and replenish,, add fine aluminium and dilute if be higher than 0.06% if the massfraction of Ti is lower than 0.04%;
The agent of spray refining for the second time 10min;
Leave standstill 20min, casting, teeming temperature is 715 ℃, gets aluminium-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face 12mm through 610 ℃ of homogenizing, and start rolling temperature is 500 ℃ of hot rollings, be cold-rolled to 0.22mm after, promptly get target product.
After testing, the chemical ingredients of product is: 0.20%Si, and 0.50%Fe, 0.10%Cu, 1.0%Mn, 0.05%Ti, impurity 0.15%, surplus is Al.Target product mechanical property: σ
bBe 190MPa, σ
0.2Be 182MPa, δ is 3.0%.
Embodiment 2
The massfraction of choosing Ti is that 0.05% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.03% in the target product.
The fine grained aluminium ingot melt that directly goes out electrolyzer is poured in the smelting furnace, and adds the fine aluminium (as Al 99.70A) of required quality, and the massfraction that makes melt Ti is 0.03%;
Add manganese additive, the massfraction that makes Mn is 1.2%;
Add the ferro-aluminum master alloy, the massfraction that makes Fe is 0.45%;
Add the aluminum bronze master alloy, the massfraction that makes Cu is 0.05%;
Add aluminium silicon master alloy, the massfraction that makes Si is 0.45%,
Add aluminium rare earth intermediate alloy (cerium-rich mischmetal), the massfraction that makes rare earth is 0.30%;
Bath composition is analyzed,, added AlTi5 master alloy grain-refining agent and replenish,, add fine aluminium and dilute if be higher than 0.035% if the massfraction of Ti is lower than 0.025%;
760 ℃ of spray refining agent 20min, blowing gas is a nitrogen, used refining agent is the wrought aluminium alloy refining agent of buying from solvent factory;
Leave standstill 20min, casting, teeming temperature is 725 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot is thick to 8.0mm through the casting of horizontal continuous casting, be cold-rolled to 0.8mm after, through 500 ℃ of recrystallization annealings, promptly get target product.
After testing, the chemical ingredients of product is: 0.45%Si, and 0.45%Fe, 0.05%Cu, 1.2%Mn, 0.03%Ti, 0.30%RE, impurity 0.23%, surplus is Al.The mechanical property of product is: σ
bBe 140MPa, σ
0.2Be 122MPa, δ is 28%.
Embodiment 3
The massfraction of choosing Ti is that 0.03% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.015% in the target product.
The fine grained aluminium ingot melt that directly goes out electrolyzer is poured in the smelting furnace, and adds the fine aluminium of required quality, and the massfraction that makes melt Ti is 0.015%;
Add the ferro-aluminum master alloy, the massfraction that makes Fe is 0.50%;
Add manganese additive, the massfraction that makes Mn is 0.95%;
Add copper additives, the massfraction that makes Cu is 0.05%;
Add aluminium rare earth intermediate alloy (lanthanum rich mischmetal), the massfraction that makes rare earth is 0.25%;
Bath composition is analyzed,, added aluminium and aluminium alloy and replenish,, add fine aluminium and dilute if be higher than 0.020% with titanium additives if the massfraction of Ti is lower than 0.010%;
750 ℃ of spray refining agent 18min, blowing gas is a nitrogen, used refining agent is the wrought aluminium alloy refining agent of buying from solvent factory;
Leave standstill 20min, casting, teeming temperature is 705 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face 15mm through 600 ℃ of homogenizing, and start rolling temperature is 500 ℃ of hot rollings, be cold-rolled to 0.22mm after, promptly get target product.
After testing, the chemical ingredients of product is: 0.04%Si, and 0.50%Fe, 0.05%Cu, 0.95%Mn, 0.015%Ti, 0.25%RE, impurity 0.29%, surplus is Al.Target product mechanical property: σ
bBe 193MPa, σ
0.2Be 180MPa, δ is 3.2%.
Embodiment 4
The massfraction of choosing Ti is that 0.08% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.06% in the target product.
Fine grained aluminium ingot, ferro-aluminum master alloy, aluminium manganese master alloy, aluminum bronze master alloy, fine aluminium are put into smelting furnace together, heat fused, and the massfraction that makes melt Ti is 0.06%, the massfraction of Fe is 0.40%, the massfraction of Mn is 0.95%, and the massfraction of Cu is 0.05%
Add pure Mg in melt, the massfraction that makes Mg is 0.35%,
Bath composition is analyzed,, added potassium fluotitanate and replenish,, add fine aluminium and dilute if be higher than 0.07% if the massfraction of Ti is lower than 0.05%;
760 ℃ of spray refining agent 13min, blowing gas is an argon gas, used refining agent is the wrought aluminium alloy refining agent of buying from solvent factory;
Leave standstill 20min, casting, teeming temperature is 700 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot is thick to 6.5mm through continuous casting and rolling, be cold-rolled to 0.4mm thickness plate after, promptly get target product.
After testing, the chemical ingredients of product is: 0.08%Si, and 0.40%Fe, 0.05%Cu, 0.95%Mn, 0.35%Mg, 0.06%Ti, impurity 0.32%, surplus is Al.The mechanical property of product is: σ
bBe 225MPa, σ
0.2Be 198MPa, δ is 1.8%.
Embodiment 5
The massfraction of choosing Ti is that 0.08% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.05% in the target product.
Fine grained aluminium ingot, ferro-aluminum master alloy, aluminium manganese master alloy, fine aluminium are put into smelting furnace together, heat fused, and the massfraction that makes melt Ti is 0.05%, and the massfraction of Fe is 0.37%, and the massfraction of Mn is 1.10%,
Add aluminium silicon master alloy in melt, the massfraction that makes Si is 0.25%,
Add the aluminum bronze master alloy in melt, the massfraction that makes Cu is 0.20%,
Add pure Mg in melt, the massfraction that makes Mg is 1.02%,
Bath composition is analyzed,, added aluminium and aluminium alloy and replenish,, add fine aluminium and dilute if be higher than 0.06% with titanium additives if the massfraction of Ti is lower than 0.04%;
730 ℃ of spray refining agent 23min, blowing gas is an argon gas, used refining agent is the wrought aluminium alloy refining agent of buying from solvent factory;
Leave standstill 20min, casting, teeming temperature is 730 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face through 570 ℃ of homogenizing, and hot rolling is cold-rolled to 2.4mm, and 360 ℃ of annealing get target product.
After testing, the chemical ingredients of product is: 0.25%Si, and 0.37%Fe, 0.20%Cu, 1.10%Mn, 1.02%Mg, 0.05%Ti, impurity 0.44%, surplus is Al.Target product mechanical property: σ
bBe 185MPa, σ
0.2Be 178MPa, δ is 20%.
Embodiment 6
The massfraction of choosing Ti is that 0.05% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.02% in the target product.
The fine grained aluminium ingot melt that directly goes out electrolyzer is poured in the smelting furnace, and adds the fine aluminium (as Al 99.70A) of required quality, and the massfraction that makes melt Ti is 0.02%;
Add manganese additive, the massfraction that makes Mn is 1.0%;
Add the ferro-aluminum master alloy, the massfraction that makes Fe is 0.32%;
Add copper additives, the massfraction that makes Cu is 0.22%;
Add aluminium silicon master alloy, the massfraction that makes Si is 0.27%,
Add pure magnesium, the massfraction that makes Mg is 1.20%;
Add aluminium boron master alloy, the massfraction that makes B is 0.0015%;
Bath composition is analyzed,, added potassium fluotitanate and replenish,, add fine aluminium and dilute if be higher than 0.025% if the massfraction of Ti is lower than 0.015%;
735 ℃ of winding-up argon gas 30min,
Leave standstill 20min, casting, teeming temperature is 725 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face through 580 ℃ of homogenizing, hot rolling, and annealing is cold-rolled to 0.35mm, gets target product.
After testing, the chemical ingredients of product is: 0.27%Si, and 0.32%Fe, 0.22%Cu, 1.0%Mn, 1.20%Mg, 0.02%Ti, 0.0015%B, impurity 0.08%, surplus is Al.Mechanical property: σ
bBe 330MPa, σ
0.2Be 298MPa, δ is 5.3%.
Embodiment 7
The massfraction of choosing Ti is that 0.14% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.10% in the target product.
The fine grained aluminium ingot melt that directly goes out electrolyzer is poured in the smelting furnace, and adds the fine aluminium of required quality, and the massfraction that makes melt Ti is 0.10%;
Add the ferro-aluminum master alloy, the massfraction that makes Fe is 0.21%;
Add copper additives, the massfraction that makes Cu is 0.15%;
Add manganese additive, the massfraction that makes Mn is 1.3%;
Bath composition is analyzed,, added aluminium titanium master alloy grain-refining agent and replenish,, add fine aluminium and dilute if be higher than 0.11% if the massfraction of Ti is lower than 0.09%;
755 ℃ of nitrogen-blow 28min,
Leave standstill 20min, casting, teeming temperature is 728 ℃, the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face 12mm through 610 ℃ of homogenizing, and start rolling temperature is 500 ℃ of hot rollings, be cold-rolled to 0.22mm after, promptly get target product.
After testing, the chemical ingredients of product is: 0.09%Si, and 0.21%Fe, 0.15%Cu, 1.3%Mn, 0.10%Ti, impurity 0.16%, surplus is Al.Target product mechanical property: σ
bBe 200MPa, σ
0.2Be 188MPa, δ is 2.8%.
Embodiment 8
Fine grained aluminium ingot, aluminium manganese master alloy are put into smelting furnace together, heat fused, and the massfraction that makes melt Ti is 0.025%, the massfraction of Mn is 1.06%,
Add pure silicon in melt, the massfraction that makes Si is 0.26%,
Add the ferro-aluminum master alloy in melt, the massfraction that makes Fe is 0.41%,
Add the aluminum bronze master alloy in melt, the massfraction that makes Cu is 0.16%,
Add pure magnesium in melt, the massfraction that makes Mg is 1.06%,
Add aluminium lanthanum master alloy in melt, the massfraction that makes La is 0.20%,
Add potassium fluoborate in melt, the massfraction that makes B is 0.005%,
Bath composition is analyzed,, is added Al-Ti-B intermediate alloy and replenish,, add fine aluminium and dilute if be higher than 0.030% if the massfraction of Ti is lower than 0.020%,
740 ℃ of spray refining agent 29min, blowing gas is a nitrogen, used refining agent is the wrought aluminium alloy refining agent of buying from solvent factory;
Leave standstill 20min, casting, teeming temperature is 720 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face through 580 ℃ of homogenizing, hot rolling, and annealing is cold-rolled to 0.35mm, gets target product.
After testing, the chemical ingredients of product is: 0.26%Si, and 0.41%Fe, 0.16%Cu, 1.06%Mn, 1.06%Mg, 0.025%Ti, 0.20%La, 0.005%B, impurity 0.36%, surplus is Al.Mechanical property: σ
bBe 335MPa, σ
0.2Be 300MPa, δ is 5.5%.
Embodiment 9
The massfraction of choosing Ti is that 0.03% fine grained aluminium ingot is a feedstock production aluminium alloy of the present invention, and the massfraction of Ti is 0.01% in the target product.
The fine grained aluminium ingot melt that directly goes out electrolyzer is poured in the smelting furnace, and adds the fine aluminium of required quality, and the massfraction that makes melt Ti is 0.01%;
Add manganese additive, the massfraction that makes Mn is 1.4%;
Add the ferro-aluminum master alloy, the massfraction that makes Fe is 0.35%;
Add aluminium silicon master alloy, the massfraction that makes Si is 0.30%,
Add the aluminum bronze master alloy, the massfraction that makes Cu is 0.10%;
Add pure magnesium, the massfraction that makes Mg is 0.30%;
Add aluminium boron master alloy, the massfraction that makes B is 0.003%;
Bath composition is analyzed,, added aluminium and aluminium alloy and replenish,, add fine aluminium and dilute if be higher than 0.015% with the titanium boron additive if the massfraction of Ti is lower than 0.005%;
740 ℃ of winding-up argon gas 30min,
Leave standstill 20min, casting, teeming temperature is 710 ℃, gets the Al-Mn series alloy ingot.
The Al-Mn series alloy ingot mills face through homogenizing, hot rolling, and annealing is cold-rolled to 0.35mm, gets target product.
After testing, the chemical ingredients of product is: 0.30%Si, and 0.35%Fe, 0.10%Cu, 1.4%Mn, 0.30%Mg, 0.01%Ti, 0.003%B, impurity 0.6%, surplus is Al.The mechanical property of product is: σ
bBe 305MPa, σ
0.2Be 272MPa, δ is 5.0.
Claims (1)
1. method for preparing distortion aluminium-Mn series alloy, the massfraction of this each element of alloy is Si≤0.6%, Fe≤0.7%, Cu≤0.30%, Mn 0.30-1.6%, Mg≤1.3%, Ti 0.005-0.15%, rare earth≤0.40%, B≤0.03%, impurity≤0.7%, surplus is an aluminium, and alloy is by adding Si, Fe in fine grained aluminium ingot, Cu, Mn, Mg, rare earth, the B element is made, and may further comprise the steps:
A. add the pure Al of required quality in the fine grained aluminium ingot melt, stir, the massfraction that makes the melt titanium is 0.005-0.15%,
B. the massfraction by above-mentioned distortion aluminium-Mn series alloy adds Si, Fe, Cu, Mn, Mg, rare earth, B, and the interpolation of each element does not have strict order,
C. temperature is 720-760 ℃, and to melt jet at least initial refining agent or gas 10-30min, blowing gas is nitrogen or argon gas,
D. bath composition is analyzed, product titaniferous amount is regulated by replenish titanium and fine aluminium to melt,
E.690-735 ℃ cast promptly gets product,
Above-mentioned b, c, d step do not have strict sequencing.
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| CNB2005100180575A CN100460544C (en) | 2005-09-29 | 2005-09-29 | Deformed Al-Mn series alloy and preparing process thereof |
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| CN117488141B (en) * | 2023-09-25 | 2024-07-26 | 安徽广银铝业有限公司 | Aluminum-manganese alloy power battery shell and processing method thereof |
| CN117070808B (en) * | 2023-10-17 | 2024-01-02 | 魏桥(苏州)轻量化研究院有限公司 | Cast aluminum alloy suitable for brazing and preparation method and application thereof |
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| JPS61179839A (en) * | 1985-02-04 | 1986-08-12 | Furukawa Electric Co Ltd:The | Aluminum wire rod for semiconductor device bonding |
| JPS648241A (en) * | 1987-06-29 | 1989-01-12 | Furukawa Aluminium | High-strength aluminum alloy sheet for drawless fin and its production |
| CN1317593A (en) * | 2000-04-13 | 2001-10-17 | 上海稀土材料中心 | Anticorrosion aluminium ally section and its preparing process |
| CN1547991A (en) * | 2003-05-21 | 2004-11-24 | 邱敏捷 | No-fume antisticking pot and its making process |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61179839A (en) * | 1985-02-04 | 1986-08-12 | Furukawa Electric Co Ltd:The | Aluminum wire rod for semiconductor device bonding |
| JPS648241A (en) * | 1987-06-29 | 1989-01-12 | Furukawa Aluminium | High-strength aluminum alloy sheet for drawless fin and its production |
| CN1317593A (en) * | 2000-04-13 | 2001-10-17 | 上海稀土材料中心 | Anticorrosion aluminium ally section and its preparing process |
| CN1547991A (en) * | 2003-05-21 | 2004-11-24 | 邱敏捷 | No-fume antisticking pot and its making process |
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