CN103981473A - Preparation method of fine-granular magnesium alloy plate - Google Patents
Preparation method of fine-granular magnesium alloy plate Download PDFInfo
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- CN103981473A CN103981473A CN201410198749.1A CN201410198749A CN103981473A CN 103981473 A CN103981473 A CN 103981473A CN 201410198749 A CN201410198749 A CN 201410198749A CN 103981473 A CN103981473 A CN 103981473A
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- magnesium alloy
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Abstract
The invention relates to a preparation method of a fine-granular magnesium alloy plate. In order to overcome the shortages of magnesium alloy plate of low strength and plasticity, rolling deformation and static recrystallization of deformed tissue induced by electrical pulse current are carried out on a magnesium alloy plate so as to enable the magnesium plate to have a compact metallographic structure and refine granules, and thus the strength and plasticity of the magnesium alloy plate are greatly improved. The preparation method has the advantages of advanced technology and detailed and accurate data. The granule size of the metallographic structure is not larger than 5 [mu]m, the uniformity is good, the tensile strength can reach 295 MPa, the elongation rate can reach 22%, so the method is an ideal preparation method of fine-granular magnesium alloy plate.
Description
Technical field
The present invention relates to a kind of preparation method of thin grained magnesium alloy plate, belong to the viscous deformation of non-ferrous metal plate and the technical field of enhancing mechanical property.
Background technology
Magnesium alloy plate is a kind of coloured light metal structure material, in electronics, space flight, aviation, instrument and meter industry field, obtained application more widely, but because intensity, the hardness of magnesium alloy plate is low, plasticity is poor, corrosion-resistant, make the application of magnesium alloy plate be subject to great limitation.
At present, the enhancing processing of magnesium alloy plate also has various ways, such as casting rolled-on method, metal cementation, doped ceramics material method, heat treating process, etc. channel deformation extrusion process, so that magnesium alloy plate obtains good mechanical property, due to the difference of process form, the difference of purposes, make the enhancing processing of magnesium alloy plate also have larger difference and deficiency, for example metallurgical structure is inhomogeneous, fragility is large, complex technical process, cost are higher, can not meet the service requirements to magnesium alloy plate, also have more enhancement techniques to need further to inquire into.
Summary of the invention
goal of the invention
The object of the invention is the situation for background technology, to magnesium alloy plate, adopt rolling deformation, electric pulse current to bring out Deformation structure's Static Recrystallization, obtain the uniformly thin grained magnesium alloy material of metallographic structure, reach the object that strengthens magnesium alloy plate mechanical property.
technical scheme
The chemical substance material that the present invention uses is: magnesium alloy plate, dehydrated alcohol, sand paper, it is as follows that it prepares consumption: take millimeter, milliliter is measure unit
Magnesium alloy plate: AZ31,500mm * 3mm * 100mm;
Dehydrated alcohol: CH
3cH
2oH, 1000mL ± 50mL;
Sand paper: 400 orders, 300mm * 0.5mm * 200mm, 3;
Preparation method is as follows:
(1) homogenizing heat treating magnesium alloys plate
The homogenizing thermal treatment of magnesium alloy plate is to heat in heat treatment furnace, 300 ℃ of Heating temperatures, heat-up time 1h;
After processing, stop heating, make it cool to 25 ℃ with the furnace;
(2) rolling magnesium alloy plate
The rolling of magnesium alloy plate is carried out on roller mill, in heating, pressurization, deformation process, completes;
1. open the topping roll resistance heater of roller mill;
Open the bottom roll resistance heater of roller mill;
Heating topping roll, bottom roll, 150 ℃ of Heating temperatures;
2. open the topping roll rotating mechanism of roller mill, make the turning direction of topping roll for counterclockwise, rotating revolution is 60 r/min;
The bottom roll rotating mechanism of opening roller mill, the turning direction that makes bottom roll is clockwise direction, rotating revolution is 60 r/min;
Adjust the distance between topping roll and bottom roll;
3. magnesium alloy plate is sent between topping roll and bottom roll from left to right, carried out the first passage rolling, rolling reduction is sheet metal thickness 25%;
4. temper, is placed in tempering stove by magnesium alloy plate, 150 ℃ of tempering temperatures, tempering time 5min;
5. adjust the distance between topping roll and bottom roll, the magnesium alloy plate after tempering is sent between topping roll and bottom roll from left to right, carry out the second passage rolling, rolling reduction is sheet metal thickness 23%;
6. temper, is placed in tempering stove by magnesium alloy plate, 150 ℃ of tempering temperatures, tempering time 5min;
7. adjust the distance between topping roll and bottom roll, the magnesium alloy plate after tempering is sent between topping roll and bottom roll from left to right, carry out the 3rd passage rolling, rolling reduction is sheet metal thickness 20%;
8. temper, is placed in tempering stove by magnesium alloy plate, 150 ℃ of tempering temperatures, tempering time 5min;
9. adjust the distance between topping roll and bottom roll, the magnesium alloy plate after tempering is sent between topping roll and bottom roll from left to right, carry out four-pass rolling, rolling reduction is sheet metal thickness 15%;
Magnesium alloy plate thickness after rolling becomes 1.2mm from 3mm;
(3) surface treated magnesium alloy plate
1. magnesium alloy plate is placed on steel flat board, with sand papering magnesium alloy plate periphery and positive and negative surface, makes any surface finish;
2. the magnesium alloy plate after polishing is cleaned to each portion with dehydrated alcohol, after cleaning, dry, make surface cleaning;
(4) electricimpulse is processed magnesium alloy plate
The electricimpulse of magnesium alloy plate is processed and is carried out on electricimpulse handler, is between positive and negative electrode, under pulse-repetition 100Hz state, completes;
1. magnesium alloy plate is packed between positive and negative electrode, and fixing;
2. open electricimpulse handler, connect positive and negative electrode power supply;
Voltage 15V, pulse-repetition 100Hz, pulse width 20 μ s;
The electricimpulse treatment time is 5.4min;
3. after electricimpulse is processed, close positive and negative electrode power supply, take off magnesium alloy plate, be thin grained magnesium alloy plate
4. thin grained magnesium alloy plate is cleaned with dehydrated alcohol, after cleaning, dry, be end product;
(5) detect, analyze, characterize
Pattern, color and luster, metallographic structure, mechanical property to the thin grained magnesium alloy plate of preparation detect, analyze, characterize;
With opticmicroscope, carry out metallographic structure analysis;
With tensile testing machine, carry out mechanics property analysis;
Conclusion: thin grained magnesium alloy plate is silver grey colour table shape, metallographic structure grain-size≤5 μ m, good uniformity, tensile strength 295MPa, elongation 22%.
beneficial effect
The present invention compares with background technology has obvious advance, for magnesium alloy plate intensity, hardness is low, the situation of corrosion-resistant, employing is to magnesium alloy plate rolling deformation, electric pulse current is brought out the mode of Deformation structure's Static Recrystallization, magnesium alloy plate is processed, make the metallographic structure of magnesium alloy plate fine and close, grain refining, increased substantially the intensity of magnesium alloy plate, hardness and erosion resistance, this preparation method's technique is advanced, data are accurately full and accurate, metallographic structure grain-size≤5 μ m, good uniformity, tensile strength reaches 295MPa, elongation reaches 22%, it is the method for the very good thin grained magnesium alloy plate of preparation.
Accompanying drawing explanation
Fig. 1 magnesium alloy plate rolling state figure
Fig. 2 magnesium alloy plate electricimpulse treated state figure
The thin grained magnesium alloy plate of Fig. 3 square section metallurgical structure figure
The thin grained magnesium alloy plate stretching of Fig. 4 stress-strain diagram
Shown in figure, list of numerals is as follows:
1, roller mill electric control box, 2, rolling display screen, 3, rolling pilot lamp, 4, roller mill power switch, 5, topping roll pivoting controller, 6, bottom roll pivoting controller, 7, left column, 8, right column, 9, roller mill footstock, 10, topping roll rotating mechanism, 11, topping roll resistive heating frame, 12, topping roll, 13, bottom roll, 14, bottom roll resistive heating frame, 15, bottom roll rotating mechanism, 16, magnesium alloy plate, 17, topping roll heating controller, 18, bottom roll heating controller, 19, electricimpulse handler, 20, electrical impulse frequency indicating meter, 21, electricimpulse pilot lamp, 22, electricimpulse power switch, 23, electrical impulse frequency setter, 24, thin grained magnesium alloy plate, 25, positive electrode support, 26, negative potential support, 27, positive electrode, 28, negative potential, 29, the first bolt, 30, the second bolt, 31, insulation support plate.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
Shown in Fig. 1, be magnesium alloy plate rolling state figure, it is correct that want each position, arranges according to quantity, according to the order of sequence operation.
The value of the chemical substance that preparation is used is to determine by the scope setting in advance, and take millimeter, milliliter is measure unit.
The rolling of magnesium alloy plate is carried out on roller mill, in heating, pressurization, deformation process, completes;
Roller mill is vertical, and roller mill electric control box 1 is provided with rolling display screen 2, rolling pilot lamp 3, rolling power switch 4, topping roll pivoting controller 5, bottom roll pivoting controller 6, topping roll heating controller 17, bottom roll heating controller 18; The upper left part of roller mill electric control box 1 be left column 7, on right part be right column 8, left column 7, right column 8 tops connect with roller mill footstock 9; In roller mill footstock 9 bottoms, be provided with topping roll rotating mechanism 10, topping roll rotating mechanism 10 bottoms connect topping roll resistive heating frame 11, and topping roll resistive heating frame 11 connects topping roll 12; On roller mill electric control box 1 top, be bottom roll rotating mechanism 15, bottom roll rotating mechanism 15 tops connect bottom roll resistive heating frame 14, and bottom roll resistive heating frame 14 tops connect bottom roll 13; Between topping roll 12, bottom roll 13, it is magnesium alloy plate 16; The turning direction of topping roll 12 is for rotating counterclockwise, and the turning direction of bottom roll 13 is for clockwise rotating, and the rolling direction of magnesium alloy plate 16 is rolling from left to right.
Shown in Fig. 2, be magnesium alloy plate electricimpulse treated state figure, it is correct that want each position, arranges according to quantity, according to the order of sequence operation.
The electricimpulse of magnesium alloy plate is processed and is carried out on electricimpulse handler, between positive and negative electrode, complete under pulse-repetition 100Hz state;
Electricimpulse handler is vertical, and electricimpulse handler 19 is provided with electrical impulse frequency indicating meter 20, electricimpulse pilot lamp 21, electricimpulse power switch 22, electrical impulse frequency setter 23; Upper left quarter at electricimpulse handler 19 is provided with positive electrode support 25, upper right quarter is provided with negative potential support 26; On positive electrode support 25 tops, connect positive electrode 27, on negative potential support 26 tops, connect negative potential 28; Between positive electrode 27, negative potential 28, install and put thin grained magnesium alloy plate 24, and by the first bolt 29, the second bolt 30, fixed respectively, centre is supported by insulation support plate 31; The electrical impulse frequency of positive electrode 27, negative potential 28 is adjusted and is controlled by electrical impulse frequency setter 23.
Shown in Fig. 3, be thin grained magnesium alloy plate square section metallurgical structure figure, known in figure: thin grained magnesium alloy grain-size≤5 μ m, and homogeneity of structure is good.
Shown in Fig. 4, be thin grained magnesium alloy plate stretching stress-strain diagram, known in figure: the tensile strength of thin grained magnesium alloy plate can reach 295MPa, and elongation can reach 22%.
Claims (3)
1. a preparation method for thin grained magnesium alloy plate, is characterized in that: the chemical substance material of use is: magnesium alloy plate, dehydrated alcohol, sand paper, it is as follows that it prepares consumption: take millimeter, milliliter is measure unit
Magnesium alloy plate: AZ31,500mm * 3mm * 100mm;
Dehydrated alcohol: CH
3cH
2oH, 1000mL ± 50mL;
Sand paper: 400 orders, 300mm * 0.5mm * 200mm, 3;
Preparation method is as follows:
Homogenizing heat treating magnesium alloys plate
The homogenizing thermal treatment of magnesium alloy plate is to heat in heat treatment furnace, 300 ℃ of Heating temperatures, heat-up time 1h;
After processing, stop heating, make it cool to 25 ℃ with the furnace;
Rolling magnesium alloy plate
The rolling of magnesium alloy plate is carried out on roller mill, in heating, pressurization, deformation process, completes;
1. open the topping roll resistance heater of roller mill;
Open the bottom roll resistance heater of roller mill;
Heating topping roll, bottom roll, 150 ℃ of Heating temperatures;
2. open the topping roll rotating mechanism of roller mill, make the turning direction of topping roll for counterclockwise, rotating revolution is 60 r/min;
The bottom roll rotating mechanism of opening roller mill, the turning direction that makes bottom roll is clockwise direction, rotating revolution is 60 r/min;
Adjust the distance between topping roll and bottom roll;
3. magnesium alloy plate is sent between topping roll and bottom roll from left to right, carried out the first passage rolling, rolling reduction is sheet metal thickness 25%;
4. temper, is placed in tempering stove by magnesium alloy plate, 150 ℃ of tempering temperatures, tempering time 5min;
5. adjust the distance between topping roll and bottom roll, the magnesium alloy plate after tempering is sent between topping roll and bottom roll from left to right, carry out the second passage rolling, rolling reduction is sheet metal thickness 23%;
6. temper, is placed in tempering stove by magnesium alloy plate, 150 ℃ of tempering temperatures, tempering time 5min;
7. adjust the distance between topping roll and bottom roll, the magnesium alloy plate after tempering is sent between topping roll and bottom roll from left to right, carry out the 3rd passage rolling, rolling reduction is sheet metal thickness 20%;
8. temper, is placed in tempering stove by magnesium alloy plate, 150 ℃ of tempering temperatures, tempering time 5min;
9. adjust the distance between topping roll and bottom roll, the magnesium alloy plate after tempering is sent between topping roll and bottom roll from left to right, carry out four-pass rolling, rolling reduction is sheet metal thickness 15%;
Magnesium alloy plate thickness after rolling becomes 1.2mm from 3mm;
Surface treated magnesium alloy plate
1. magnesium alloy plate is placed on steel flat board, with sand papering magnesium alloy plate periphery and positive and negative surface, makes any surface finish;
2. the magnesium alloy plate after polishing is cleaned to each portion with dehydrated alcohol, after cleaning, dry, make surface cleaning;
Electricimpulse is processed magnesium alloy plate
The electricimpulse of magnesium alloy plate is processed and is carried out on electricimpulse handler, is between positive and negative electrode, under pulse-repetition 100Hz state, completes;
1. magnesium alloy plate is packed between positive and negative electrode, and fixing;
2. open electricimpulse handler, connect positive and negative electrode power supply;
Voltage 15V, pulse-repetition 100Hz, pulse width 20 μ s;
The electricimpulse treatment time is 5.4min;
3. after electricimpulse is processed, close positive and negative electrode power supply, take off magnesium alloy plate, be thin grained magnesium alloy plate
4. thin grained magnesium alloy plate is cleaned with dehydrated alcohol, after cleaning, dry, be end product;
Detect, analyze, characterize
Pattern, color and luster, metallographic structure, mechanical property to the thin grained magnesium alloy plate of preparation detect, analyze, characterize;
With opticmicroscope, carry out metallographic structure analysis;
With tensile testing machine, carry out mechanics property analysis;
Conclusion: thin grained magnesium alloy plate is silver grey colour table shape, metallographic structure grain-size≤5 μ m, good uniformity, tensile strength 295MPa, elongation 22%.
2. the preparation method of a kind of thin grained magnesium alloy plate according to claim 1, is characterized in that: the rolling of magnesium alloy plate is carried out on roller mill, in heating, pressurization, deformation process, completes;
Roller mill is vertical, and roller mill electric control box (1) is provided with rolling display screen (2), rolling pilot lamp (3), rolling power switch (4), topping roll pivoting controller (5), bottom roll pivoting controller (6), topping roll heating controller (17), bottom roll heating controller (18); Upper left part at roller mill electric control box (1) is that left column (7), upper right part are right column (8), and left column (7), right column (8) top connect with roller mill footstock (9); In roller mill footstock (9) bottom, be provided with topping roll rotating mechanism (10), topping roll rotating mechanism (10) bottom connects topping roll resistive heating frame (11), and topping roll resistive heating frame (11) connects topping roll (12); On roller mill electric control box (1) top, be bottom roll rotating mechanism (15), bottom roll rotating mechanism (15) top connects bottom roll resistive heating frame (14), and bottom roll resistive heating frame (14) top connects bottom roll (13); Between topping roll (12), bottom roll (13), be magnesium alloy plate (16); The turning direction of topping roll (12) is for rotating counterclockwise, and the turning direction of bottom roll (13) is for clockwise rotating, and the rolling direction of magnesium alloy plate (16) is rolling from left to right.
3. the preparation method of a kind of thin grained magnesium alloy according to claim 1, is characterized in that: the electricimpulse of magnesium alloy plate is processed and carried out on electricimpulse handler, between positive and negative electrode, complete under pulse-repetition 100Hz state;
Electricimpulse handler is vertical, and electricimpulse handler (19) is provided with electrical impulse frequency indicating meter (20), electricimpulse pilot lamp (21), electricimpulse power switch (22), electrical impulse frequency setter (23); Upper left quarter at electricimpulse handler (19) is provided with positive electrode support (25), upper right quarter is provided with negative potential support (26); On positive electrode support (25) top, connect positive electrode (27), on negative potential support (26) top, connect negative potential (28); Between positive electrode (27), negative potential (28), install and put thin grained magnesium alloy plate (24), and by the first bolt (29), the second bolt (30), fixed respectively, centre is supported by insulation support plate (31); The electrical impulse frequency of positive electrode (27), negative potential (28) is controlled by electrical impulse frequency setter (23) adjustment.
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| CN201410198749.1A CN103981473B (en) | 2014-05-12 | 2014-05-12 | A kind of preparation method of thin grained magnesium alloy plate |
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| CN201410198749.1A CN103981473B (en) | 2014-05-12 | 2014-05-12 | A kind of preparation method of thin grained magnesium alloy plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019035141A (en) * | 2017-08-21 | 2019-03-07 | ソウル大学校産学協力団Ｓｅｏｕｌ Ｎａｔｉｏｎａｌ Ｕｎｉｖｅｒｓｉｔｙ Ｒ＆Ｄｂ Ｆｏｕｎｄａｔｉｏｎ | Method of enhancing moldability of magnesium alloy |
| CN109500128A (en) * | 2018-12-21 | 2019-03-22 | 太原理工大学 | A kind of magnalium steel laminated composite plate and preparation method thereof |
| CN111360072A (en) * | 2020-03-13 | 2020-07-03 | 吉林大学 | Rolling equipment based on high-frequency current assistance and high-reduction rolling method |
| CN113560397A (en) * | 2021-07-13 | 2021-10-29 | 太原理工大学 | Device and method for preparing high-strength plastic magnesium alloy sheet under current assistance |
| CN114717496A (en) * | 2022-03-24 | 2022-07-08 | 太原理工大学 | Boeing hot rolling combined pulse current annealing method for titanium alloy plate |
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| US20070123427A1 (en) * | 2005-11-25 | 2007-05-31 | Council Of Scientific And Industrial Research | Process for the continuous production of magnesium diboride based superconductors |
| CN102581057A (en) * | 2012-01-12 | 2012-07-18 | 太原理工大学 | Method for preparing enhanced magnesium alloy composite board |
| CN202921654U (en) * | 2012-12-17 | 2013-05-08 | 黑龙江同禹傲思铝业股份有限公司 | Heating control apparatus of magnesium alloy sheet material roller |
| CN103276328A (en) * | 2013-05-30 | 2013-09-04 | 济南大学 | Severe plastic deformation technology of magnesium alloy board |
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- 2014-05-12 CN CN201410198749.1A patent/CN103981473B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070123427A1 (en) * | 2005-11-25 | 2007-05-31 | Council Of Scientific And Industrial Research | Process for the continuous production of magnesium diboride based superconductors |
| CN102581057A (en) * | 2012-01-12 | 2012-07-18 | 太原理工大学 | Method for preparing enhanced magnesium alloy composite board |
| CN202921654U (en) * | 2012-12-17 | 2013-05-08 | 黑龙江同禹傲思铝业股份有限公司 | Heating control apparatus of magnesium alloy sheet material roller |
| CN103276328A (en) * | 2013-05-30 | 2013-09-04 | 济南大学 | Severe plastic deformation technology of magnesium alloy board |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019035141A (en) * | 2017-08-21 | 2019-03-07 | ソウル大学校産学協力団Ｓｅｏｕｌ Ｎａｔｉｏｎａｌ Ｕｎｉｖｅｒｓｉｔｙ Ｒ＆Ｄｂ Ｆｏｕｎｄａｔｉｏｎ | Method of enhancing moldability of magnesium alloy |
| CN109500128A (en) * | 2018-12-21 | 2019-03-22 | 太原理工大学 | A kind of magnalium steel laminated composite plate and preparation method thereof |
| CN111360072A (en) * | 2020-03-13 | 2020-07-03 | 吉林大学 | Rolling equipment based on high-frequency current assistance and high-reduction rolling method |
| CN113560397A (en) * | 2021-07-13 | 2021-10-29 | 太原理工大学 | Device and method for preparing high-strength plastic magnesium alloy sheet under current assistance |
| CN114717496A (en) * | 2022-03-24 | 2022-07-08 | 太原理工大学 | Boeing hot rolling combined pulse current annealing method for titanium alloy plate |
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