CN104745900B - A kind of rolling mill practice improving aluminum-magnesium-erbium alloy cryogenic mechanics performance - Google Patents
A kind of rolling mill practice improving aluminum-magnesium-erbium alloy cryogenic mechanics performance Download PDFInfo
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- CN104745900B CN104745900B CN201510185751.XA CN201510185751A CN104745900B CN 104745900 B CN104745900 B CN 104745900B CN 201510185751 A CN201510185751 A CN 201510185751A CN 104745900 B CN104745900 B CN 104745900B
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Abstract
A kind of rolling mill practice improving aluminum-magnesium-erbium alloy cryogenic mechanics performance, belongs to non-ferrous alloy technical field.To weight/mass percentage composition it is: Mg, 5.7% 6.5%；Mn, 0.3% 0.9%；Zn 0.5% 0.9%；Zr, 0.1% 0.3%；Er, 0.1% 0.3%；Inevitable impurity≤0.5%, surplus is the aluminum-magnesium-erbium alloy cast ingot of Al, hot rolling at temperature is 410 ± 20 DEG C, and drafts is more than 90%, and air cooling, to room temperature, then carries out hot rolling at 370 DEG C of insulation 1h, and drafts is 60%, and air cooling is to room temperature.This kind of processing technique can either improve this alloy intensity at low temperatures, can keep again higher low-temperature impact toughness and elongation percentage, obtains the most high-strength impact-resistant aluminum-magnesium-erbium alloy material of one.
Description
Technical field
The invention belongs to non-ferrous metal technical field, be specifically related to draftability under a kind of raising aluminum-magnesium-erbium alloy material at low temperature
Can be with the rolling mill practice of impact property.
Background technology
Along with aeronautical and space technology and the development of low-temperature pressure container, the most urgent to the demand of cryogenic material, Al-Mg system
Alloy is widely used in space flight due to its good weldability, corrosion resistance and the highest intensity and plasticity and toughness
Device and low-temperature pressure container.Under low temperature, nucleus thermal vibration can reduce, short distance resistance, as point defect, jog forming process produce
Resistance increases, and the stress field and the mutually produced long-range resistance of friendship section by dislocation remains unchanged substantially, therefore temperature fall
Low, rheological resistance increases, and then metal strength is improved.Owing to traditional Al-Mg system alloy strength is relatively low, heat treatment
Can not strengthen, so mainly improving its intensity by the method for microalloying and working hardening.Research finds, improves containing of Mg
Amount can significantly improve the intensity of alloy, and the addition of Er simultaneously can form supersaturated solid solution, at heat treatment subsequently in aluminum
With the Al separating out secondary Dispersed precipitate in hot procedure3Er phase, pinning dislocation and sub boundary thus put forward heavy alloyed intensity.
Summary of the invention
It is an object of the invention to provide a kind of rolling mill practice improving aluminum-magnesium-erbium alloy cryogenic mechanics performance.By properly
Processing technique, it is thus achieved that the most high-strength impact-resistant aluminum-magnesium-erbium alloy material.
This aluminum-magnesium-erbium alloy quality of materials percentage composition is；Mg, 5.7%-6.5%；Mn, 0.3%-0.9%；Zn0.5%-
0.9%；Zr, 0.1%-0.3%；Er, 0.1%-0.3%；Inevitable impurity≤0.5%, surplus is Al, it is characterised in that
Comprise the following steps:
(1) for this aluminum-magnesium-erbium alloy cast ingot, hot rolling at temperature is 410 ± 20 DEG C, drafts is more than 90%, and air cooling is extremely
Room temperature；
(2) the rolled aluminum-magnesium-erbium alloy sheet material after processing step (1) is incubated 1h at 370 DEG C, then carries out hot rolling, pressure
Lower amount is 60%, and air cooling is to room temperature；
The present invention is by carrying out from room temperature (293K) to low temperature (77K) the aluminum-magnesium-erbium alloy sheet material of different processing technique
Stretching and Charpy v-notch impact experiment, draw in the processing technique of 370 DEG C/1h hot rolling 60% drafts, can either keep relatively
High low-temperature impact toughness and elongation percentage, it is also possible to improve this alloy intensity at low temperatures.The present invention has following useful effect
Really:
Rolling mill practice provided by the present invention can either keep higher low-temperature impact toughness and elongation percentage, it is also possible to improves
This alloy intensity at low temperatures.Solve aluminum-magnesium-erbium alloy intensity at low temperatures and the conflicting problem of impact flexibility, make
It has higher obdurability comprehensive mechanical property at low temperatures, and aluminum-magnesium-erbium alloy application at low temperatures is had the biggest guidance
Meaning.
Accompanying drawing explanation
Fig. 1 tensile sample.
Fig. 2 impact specimen.
Detailed description of the invention
Embodiment 1
To aluminum-magnesium-erbium alloy quality of materials percentage composition it is；Mg, 5.7%-6.5%；Mn, 0.3%-0.9%；Zn0.5%-
0.9%；Zr, 0.1%-0.3%；Er, 0.1%-0.3%；Inevitable impurity≤0.5%, surplus is the aluminum-magnesium-erbium alloy of Al
Ingot casting, hot rolling at temperature is 410 ± 20 DEG C, drafts is 90%, air cooling to room temperature, and sheet material final thickness is 10mm, is designated as
Technique two；Then at 370 DEG C, the sheet material of technique two being incubated 1h, reheating rolls 60% drafts, and air cooling to room temperature, sheet material is the thickest
Degree is 4mm, is designated as technique one；Again technique two sheet material is annealed through 350 ± 10 DEG C/2h, the most cold rolling 60% drafts, thickness
4mm, is designated as middle process, middle art plate is carried out 350 ± 10 DEG C/2h annealing, is designated as technique three；To middle art plate
Carry out 170 ± 10 DEG C/2h annealing, be designated as technique four.
The sheet material edge of technique one is rolled to being processed into tensile sample and impact specimen respectively, then carries out extension test and punching
Hitting test, test temperature is 293K, 223K, 150K, 111K and 77K, temperature error ± 5K, and wherein test temperature 77K uses
Sample being completely immersed in liquid nitrogen obtain, the steam that 223K～111K is produced by liquid nitrogen atomization obtains, and uses rhodium ferrum temperature sensing
Device controls test temperature；Control to carry out extension test on electronic universal tester at MTS-SANS CMT5000 Series Microcomputer, draw
Stretching speed 2mm/min, extension test result is listed in table 1；SUNS PTM1200 Charpy impact machine tester carries out impact survey
Examination, shock-testing result is listed in table 2；Each numerical value of extension test and shock-testing be with under the conditions of 3 sample testing values
Meansigma methods.
Comparative example 1
Using material same as in Example 1, processing technique is technique two, and technique two sheet material is carried out extension test respectively
And shock-testing, method of testing is listed in Tables 1 and 2 respectively with embodiment 1, extension test and shock-testing result.
Comparative example 2
Using material same as in Example 1, processing technique is technique three, and technique tri-plate carries out extension test respectively
And shock-testing, method of testing is listed in Tables 1 and 2 respectively with embodiment 1, extension test and shock-testing result.
Comparative example 3
Using material same as in Example 1, processing technique is technique four, and technique four sheet material is carried out extension test respectively
And shock-testing, method of testing is listed in Tables 1 and 2 respectively with embodiment 1, extension test and shock-testing result.
In table 1, tensile strength and the yield strength of the material prepared by 4 kinds of processing technique all rise with the decline of temperature
Height, under room temperature and 77K, tensile strength and the yield strength of the material prepared by 4 kinds of processing technique are followed successively by work from big to small
Skill four, technique one, technique two, technique three；Elongation percentage is followed successively by technique two, technique one, technique three, technique four from big to small.
In table 2, the notched bar impact strength of the material prepared by 4 kinds of processing technique all declines with the decline of temperature, in room temperature
With under 77K, notched bar impact strength is followed successively by technique one, technique two, technique three, technique four from big to small；Wherein technique one and technique
Two still keep higher impact flexibility when 77K.
It can be seen that when 77K, tensile strength and the yield strength of technique four are the highest, and impact flexibility and elongation percentage are worst；
The tensile strength of technique three, yield strength and impact flexibility all ratios relatively are relatively low；The notched bar impact strength of technique two and elongation percentage ratio
Higher, but tensile strength and yield strength ratio are relatively low；And technique one does not only have the highest notched bar impact strength, and tensile strength
The highest with yield strength；In sum, the aluminum-magnesium-erbium alloy material prepared by technique one is high-strength in a low temperature of possessing well
Impact-resistant mechanical property.
The tensile property of table 1. aluminum-magnesium-erbium alloy
The impact property of table 2. aluminum-magnesium-erbium alloy
Claims (1)
1. improving a rolling mill practice for aluminum-magnesium-erbium alloy cryogenic mechanics performance, aluminum-magnesium-erbium alloy quality of materials percentage composition is:
Mg, 5.7%-6.5%；Mn, 0.3%-0.9%；Zn 0.5%-0.9%；Zr, 0.1%-0.3%；Er, 0.1%-0.3%, remaining
Amount is Al, it is characterised in that comprise the following steps:
(1) for this aluminum-magnesium-erbium alloy cast ingot, hot rolling at temperature is 410 ± 20 DEG C, drafts is more than 90%, and air cooling is to room
Temperature；
(2) the rolled aluminum-magnesium-erbium alloy sheet material 370 DEG C insulation 1h after step (1) being processed, then carry out hot rolling, drafts is
60%, air cooling is to room temperature.
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| CN201510185751.XA CN104745900B (en) | 2015-04-18 | 2015-04-18 | A kind of rolling mill practice improving aluminum-magnesium-erbium alloy cryogenic mechanics performance |
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| CN104745900A CN104745900A (en) | 2015-07-01 |
| CN104745900B true CN104745900B (en) | 2016-08-17 |
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| CN105349925B (en) * | 2015-12-02 | 2017-08-04 | 北京工业大学 | A kind of liquid nitrogen temperature cold machining process of Al Mg systems alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217030A (en) * | 1996-04-04 | 1999-05-19 | 荷高文斯铝轧制品有限公司 | Aluminium-magnesium alloy plate or extrusion |
| CN102586707A (en) * | 2012-03-13 | 2012-07-18 | 北京工业大学 | Heat treatment process for inter-crystalline corrosion resisting high-Mg Er-containing aluminum alloy cold-rolled plate |
| CN104032192A (en) * | 2014-03-18 | 2014-09-10 | 北京工业大学 | Rolling and thermal processing process capable of enhancing anti-fatigue-damage performance of erbium-containing aluminium alloy plate |
-
2015
- 2015-04-18 CN CN201510185751.XA patent/CN104745900B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217030A (en) * | 1996-04-04 | 1999-05-19 | 荷高文斯铝轧制品有限公司 | Aluminium-magnesium alloy plate or extrusion |
| CN102586707A (en) * | 2012-03-13 | 2012-07-18 | 北京工业大学 | Heat treatment process for inter-crystalline corrosion resisting high-Mg Er-containing aluminum alloy cold-rolled plate |
| CN104032192A (en) * | 2014-03-18 | 2014-09-10 | 北京工业大学 | Rolling and thermal processing process capable of enhancing anti-fatigue-damage performance of erbium-containing aluminium alloy plate |
Non-Patent Citations (2)
| Title |
|---|
| "Al-Mg-Mn-Zr-Er合金冲击韧性研究";彭业密等;《科学技术与工程》;20110708;第11卷(第19期);第4436-4439,4444页 * |
| "热轧Al-Mg-Mn-Er-Zr合金板材的低温冲击性能";王旭东，陈龙飞;《金属热处理》;20141215;第39卷(第12期);第76-79页 * |
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