CN105256178A - Corrosion resisting aluminum alloy and preparing method thereof - Google Patents
Corrosion resisting aluminum alloy and preparing method thereof Download PDFInfo
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- CN105256178A CN105256178A CN201510717777.4A CN201510717777A CN105256178A CN 105256178 A CN105256178 A CN 105256178A CN 201510717777 A CN201510717777 A CN 201510717777A CN 105256178 A CN105256178 A CN 105256178A
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Abstract
The invention relates to corrosion resisting aluminum alloy and a preparing method thereof. The alloy is prepared from, by weight, smaller than or equal to 0.4% of Si, 5% to 10% of Fe, 3% to 7% of Ti, 0.05% to 0.3% of Cu, 5% to 7% of Mn, 0.4% to 0.7% of Mg and 0.15% to 0.3% of Zn. The preparing method of the alloy includes the steps that elementary substances or intermediate alloy of Si, Ti, Fe, Cu, Mn, Mg and Zn are/is added into industrial pure aluminum ingot melt at different temperature stages, and after the melt is purified, Al-Mn alloy ingots are obtained through casting; and after homogenization treatment, hot rolling is carried out at the temperature of 600 DEG C to 700 DEG C, intermediate annealing is carried out for 1 h to 4 h at the temperature of 300 DEG C to 450 DEG C after cold coarse rolling, then cold fine rolling is carried out, the deformation amount ranges from 35% to 45%, and the use state in the H24 treatment state is achieved through finished product annealing. The obtained material both has the excellent corrosion resistance and the good mechanical performance.
Description
Technical field
The present invention relates to aluminium alloy, particularly relate to a kind of anticorrosion aluminium and manufacture method thereof, belong to non-ferrous metal technical field.
Background technology
The aluminium alloy that the metal thermal treatment of distortion Al-Mn system can not be strengthened, its outstanding feature is anti-corrosion, conduction, good heat conductivity, and there are good reflectivity, non magnetic, excellent welding property and processibility etc., be widely used in the fields such as wrapping material, heat exchange material, sensitive materials, finishing material, welding material.Along with the raising that vehicle operation performance requires, and the raising of the calorize rate of the heavy vehicle heat exchanger such as truck, the material for heat exchanger is had higher requirement.At present, the aluminum alloy materials performance that domestic production is used for heat exchanger is relatively poor, can not meet the service requirements of heat exchanger product well, especially to the requirement of material corrosion resistance.
Patent CN101413076A discloses a kind of anticorrosion aluminium and manufacture method thereof, described alloying constituent content: Si≤0.4wt%, Fe≤0.4wt%, Cu0.05 ~ 0.3wt%, Mn1.1 ~ 1.5wt%, Mg0.4 ~ 0.7wt%, Zn0.15 ~ 0.3wt%, Cr0.05 ~ 0.15wt%.Its method for making: in technical pure aluminium ingot melt, adds simple substance or the master alloys such as Si, Fe, Cu, Mn, Mg, Cr, Zn in the differing temps stage, after cleaning molten process, casting obtains Al-Mn system alloy pig; After Homogenization Treatments, carry out hot rolling at 470 ~ 530 DEG C, carry out cold finish rolling again after cold roughing through 300 ~ 450 DEG C of process annealing 1 ~ 4h, deflection is 35 ~ 45%, obtains the using state of H24 process state through finished products.Although above-mentioned anticorrosion aluminium has excellent corrosion resistance nature, its mechanical property is unsatisfactory, and this makes it apply to be limited by very large, and its corrosion resistance nature need further raising.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, a kind of anticorrosion aluminium and manufacture method thereof are provided, aim to provide a kind of aluminum alloy materials not only having excellent corrosion resistance but also there is good mechanical properties.
Object of the present invention is achieved through the following technical solutions:
A kind of anticorrosion aluminium, the mass percentage of its composition is as follows:
All the other components of this alloy are Al and inevitable impurity.
Wherein, the mass percentage of Fe can be 5wt%, 6wt%, 7wt%, 8wt%, 9wt% or 10wt% etc.; The mass percentage of Ti can be 3wt%, 4wt%, 5wt%, 6wt% or 7wt% etc.; The mass percentage of Si can be 0.1wt%, 0.2wt%, 0.3wt% or 0.4wt% etc.; The mass percentage of Mn can be 5wt%, 6wt% or 7wt% etc.; The mass percentage of Cu can be 0.05wt%, 0.1wt%, 0.2wt% or 0.3wt% etc.; The mass percentage of Mg can be 0.4wt%, 0.5wt%, 0.6wt% or 0.7wt% etc.; The mass percentage of Zn can be 0.15wt%, 0.1wt%, 0.2wt% or 0.3wt% etc.
Further, above-mentioned a kind of anticorrosion aluminium, is characterized in that: described aluminium alloy is also containing Zr, and total content is less than 0.02wt%.
Further, a kind of manufacture method of anticorrosion aluminium, comprises the following steps:
1. first main raw material is melted, auxiliary material is added in 710 ~ 770 DEG C of temperature ranges, cast after cleaning molten, control composition content Si≤0.4wt% in the fabrication process, Fe5 ~ 10wt%, Ti3 ~ 7wt%, Cu0.05 ~ 0.3wt%, Mn5 ~ 7wt%, Mg0.4 ~ 0.7wt%, Zn0.15 ~ 0.3wt%;
2. the Heating temperature at 600 ~ 700 DEG C after the strand Homogenization Treatments obtained is carried out hot rolling, control pass deformation and total working modulus in the fabrication process, its total reduction is more than 85%, and wherein Heating temperature can be 600 DEG C, 620 DEG C, 650 DEG C, 670 DEG C or 700 DEG C etc.;
3. hot rolled band is carried out cold roughing after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is more than 70%;
4. cold roughing band is carried out cold finish rolling after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is 35 ~ 45%;
5. cold finished strip is carried out finished products 1 ~ 3h in 250 ~ 310 DEG C of temperature ranges, obtain the using state product of H24 state.
Again further, the manufacture method of above-mentioned a kind of anticorrosion aluminium, described main raw material is commercial-purity aluminium, and auxiliary material is aluminium manganese master alloy, aluminum bronze intermediate alloy, aluminium silicon master alloy, industrial-purity zinc, pure magnesium, aluminium chromium hardener and chalybeate.
The substantive distinguishing features that technical solution of the present invention is outstanding and significant progress are mainly reflected in:
The present invention utilizes Fe element in aluminium alloy, synergy between Ti element and Mn element, and pass through the ratio of control three kinds of elements, the aluminum alloy materials that end value is obtained has excellent corrosion resistance nature, its corrosion-resistant speed is only about 0.3mm/a, mass loss rate is only about 10%, and it has excellent mechanical property, and tensile strength can reach about 350MPa, yield strength is about 250MPa, and unit elongation is more than 30%.
Embodiment
For meeting in industrial production all characteristics required by aluminum alloy materials, the invention provides a kind of anticorrosion aluminium and manufacture method thereof, select the component concentration of best Fe, Ti, Si, Mn, Mg, Cu and Zn, manufacture with means such as the rolling processing conditions of suitable strand melting technology, strand and thermal treatment process, manufacture its characteristic such as corrosion resistance nature, mechanical property of aluminium alloy obtained and all can meet the many requirement of heat exchanger to material property preferably.
Anticorrosion aluminium, component content is: Si≤0.4wt%, Fe5 ~ 10wt%, Ti3 ~ 7wt%, Cu0.05 ~ 0.3wt%, Mn5 ~ 7wt%, Mg0.4 ~ 0.7wt%, Zn0.15 ~ 0.3wt%; Also containing Zr in alloy, and total content is less than 0.02wt%; The corrosion resistance nature of this aluminium alloy when H24 state and mechanical property are all better than market similar alloy product.
The manufacturing process of anticorrosion aluminium: 1. first by technical pure aluminium ingot 710 ~ 770 DEG C of fusings, add aluminium manganese master alloy, aluminum bronze intermediate alloy, aluminium silicon master alloy, industrial-purity zinc, pure magnesium, aluminium chromium hardener and chalybeate etc., cast after melting purification, control composition content: Si≤0.4wt%, Fe5 ~ 10wt%, Ti3 ~ 7wt%, Cu0.05 ~ 0.3wt%, Mn5 ~ 7wt%, Mg0.4 ~ 0.7wt%, Zn0.15 ~ 0.3wt%; 2. the Heating temperature at 600 ~ 700 DEG C after the strand Homogenization Treatments obtained is carried out hot rolling, control pass deformation and total working modulus in the fabrication process, its total reduction reaches more than 85%; 3. hot rolled band is carried out cold roughing after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus in the fabrication process, and template planeness, its total reduction reaches more than 70%; 4. cold roughing band is carried out cold finish rolling after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus in the fabrication process, and template planeness, its total reduction is 35 ~ 45%; 5. 1 ~ the 3h that annealed in 250 ~ 310 DEG C of temperature ranges by cold finished strip obtains the finished product of H24 state.
In manufacturing process of the present invention: alloy raw material is commercial-purity aluminium, aluminium manganese master alloy, aluminum bronze intermediate alloy, aluminium silicon master alloy, industrial-purity zinc, pure magnesium, aluminium chromium hardener and chalybeate, adopt resistance furnace melting.It should be noted that in fusion process and need to control melt temperature when adding Mg, Zn and alloying time, to reduce the scaling loss of Mg, Zn, after alloying completes, need purifying treatment to cast again.
Embodiment 1:
1. first main raw material is melted, in 740 DEG C of temperature ranges, add auxiliary material, cast after cleaning molten, in the fabrication process control composition content Si≤0.4wt%, Fe6wt%, Ti5wt%, Cu0.2wt%, Mn6wt%, Mg0.5wt%, Zn0.2wt%;
2. the Heating temperature at 650 DEG C after the strand Homogenization Treatments obtained is carried out hot rolling, control pass deformation and total working modulus in the fabrication process, its total reduction is more than 85%;
3. hot rolled band is carried out cold roughing after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is more than 70%;
4. cold roughing band is carried out cold finish rolling after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is 35 ~ 45%;
5. cold finished strip is carried out finished products 2h in 270 DEG C of temperature ranges, obtain the using state product of H24 state.
Carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Embodiment 2:
1. first main raw material is melted, in 710 DEG C of temperature ranges, add auxiliary material, cast after cleaning molten, in the fabrication process control composition content Si≤0.4wt%, Fe5wt%, Ti3wt%, Cu0.05wt%, Mn5wt%, Mg0.4wt%, Zn0.15wt%;
2. the Heating temperature at 600 DEG C after the strand Homogenization Treatments obtained is carried out hot rolling, control pass deformation and total working modulus in the fabrication process, its total reduction is more than 85%;
3. hot rolled band is carried out cold roughing after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is more than 70%;
4. cold roughing band is carried out cold finish rolling after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is 35 ~ 45%;
5. cold finished strip is carried out finished products 3h in 250 DEG C of temperature ranges, obtain the using state product of H24 state.
Carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Embodiment 3:
1. first main raw material is melted, in 770 DEG C of temperature ranges, add auxiliary material, cast after cleaning molten, in the fabrication process control composition content Si≤0.4wt%, Fe10wt%, Ti7wt%, Cu0.3wt%, Mn7wt%, Mg0.7wt%, Zn0.3wt%;
2. the Heating temperature at 700 DEG C after the strand Homogenization Treatments obtained is carried out hot rolling, control pass deformation and total working modulus in the fabrication process, its total reduction is more than 85%;
3. hot rolled band is carried out cold roughing after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is more than 70%;
4. cold roughing band is carried out cold finish rolling after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is 35 ~ 45%;
5. cold finished strip is carried out finished products 1h in 310 DEG C of temperature ranges, obtain the using state product of H24 state.
Carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Comparative example 1:
The embodiment 1 of patent CN101413076A, carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Comparative example 2:
Except not adding Ti element, other steps and constituent content are all in the same manner as in Example 1, carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Comparative example 3:
Except not adding Fe element, other steps and constituent content are all in the same manner as in Example 1, carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Comparative example 4:
Except not adding Mn element, other steps and constituent content are all in the same manner as in Example 1, carry out corrosion resistance test (GB10124-88) and Mechanics Performance Testing (GB/T228-2002) to obtained product, test result is listed in table 1.
Table 1: embodiment 1-3 and comparative example 1-4 product performance test chart
The result of integrated embodiment 1-3 and comparative example 1-4 can find out that the present invention utilizes Fe element in aluminium alloy, synergy between Ti element and Mn element, and pass through the ratio of control three kinds of elements, the aluminum alloy materials that end value is obtained has excellent corrosion resistance nature, its corrosion-resistant speed is only about 0.3mm/a, mass loss rate is only about 10%, and it has excellent mechanical property, and tensile strength can reach about 350MPa, yield strength is about 250MPa, and unit elongation is more than 30%.
Applicant states, the present invention illustrates processing method of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned processing step, does not namely mean that the present invention must rely on above-mentioned processing step and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of raw material selected by the present invention, all drops within protection scope of the present invention and open scope.
Claims (4)
1. an anticorrosion aluminium, is characterized in that: the mass percentage of its composition is as follows:
All the other components of this alloy are Al and inevitable impurity.
2. a kind of anticorrosion aluminium according to claim 1, is characterized in that: described aluminium alloy is also containing Zr, and total content is less than 0.02wt%.
3. the manufacture method of a kind of anticorrosion aluminium described in claim 1 or 2, is characterized in that: comprise the following steps:
1. first main raw material is melted, auxiliary material is added in 710 ~ 770 DEG C of temperature ranges, cast after cleaning molten, control composition content Si≤0.4wt% in the fabrication process, Fe5 ~ 10wt%, Ti3 ~ 7wt%, Cu0.05 ~ 0.3wt%, Mn5 ~ 7wt%, Mg0.4 ~ 0.7wt%, Zn0.15 ~ 0.3wt%;
2. the Heating temperature at 600 ~ 700 DEG C after the strand Homogenization Treatments obtained is carried out hot rolling, control pass deformation and total working modulus in the fabrication process, its total reduction is more than 85%;
3. hot rolled band is carried out cold roughing after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is more than 70%;
4. cold roughing band is carried out cold finish rolling after the process annealing of 300 ~ 450 DEG C/1 ~ 4h, control pass deformation and total working modulus and template planeness in the fabrication process, its total reduction is 35 ~ 45%;
5. cold finished strip is carried out finished products 1 ~ 3h in 250 ~ 310 DEG C of temperature ranges, obtain the using state product of H24 state.
4. the manufacture method of a kind of anticorrosion aluminium according to claim 3, it is characterized in that: described main raw material is commercial-purity aluminium, auxiliary material is aluminium manganese master alloy, aluminum bronze intermediate alloy, aluminium silicon master alloy, industrial-purity zinc, pure magnesium, aluminium chromium hardener and chalybeate.
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| JP2007169712A (en) * | 2005-12-21 | 2007-07-05 | Aisin Seiki Co Ltd | Aluminum alloy for plastic working |
| AU2006235903A1 (en) * | 2006-11-03 | 2008-05-22 | Marine Protection Systems Pty Ltd | Alloy for use in galvanic protection |
| CN101186986A (en) * | 2007-11-30 | 2008-05-28 | 苏州有色金属研究院有限公司 | High-intensity aluminum manganese alloy for heat exchanger and its manufacture method |
| CN104357720A (en) * | 2014-11-27 | 2015-02-18 | 昆山泽拉金属制品有限公司 | Corrosion-resistant aluminum alloy |
| CN104962786A (en) * | 2015-06-12 | 2015-10-07 | 浙江米皇铝业股份有限公司 | Corrosion-resistant aluminum alloy profile |
| CN105002403A (en) * | 2015-07-13 | 2015-10-28 | 苏州金业船用机械厂 | Manufacturing method of easy-to-process aluminium alloy plate for ships |
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- 2015-10-29 CN CN201510717777.4A patent/CN105256178A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007169712A (en) * | 2005-12-21 | 2007-07-05 | Aisin Seiki Co Ltd | Aluminum alloy for plastic working |
| AU2006235903A1 (en) * | 2006-11-03 | 2008-05-22 | Marine Protection Systems Pty Ltd | Alloy for use in galvanic protection |
| CN101186986A (en) * | 2007-11-30 | 2008-05-28 | 苏州有色金属研究院有限公司 | High-intensity aluminum manganese alloy for heat exchanger and its manufacture method |
| CN104357720A (en) * | 2014-11-27 | 2015-02-18 | 昆山泽拉金属制品有限公司 | Corrosion-resistant aluminum alloy |
| CN104962786A (en) * | 2015-06-12 | 2015-10-07 | 浙江米皇铝业股份有限公司 | Corrosion-resistant aluminum alloy profile |
| CN105002403A (en) * | 2015-07-13 | 2015-10-28 | 苏州金业船用机械厂 | Manufacturing method of easy-to-process aluminium alloy plate for ships |
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