CN109940044A - A kind of magnesium alloy plate electric-pulse cold rolling method - Google Patents
A kind of magnesium alloy plate electric-pulse cold rolling method Download PDFInfo
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- CN109940044A CN109940044A CN201910268849.XA CN201910268849A CN109940044A CN 109940044 A CN109940044 A CN 109940044A CN 201910268849 A CN201910268849 A CN 201910268849A CN 109940044 A CN109940044 A CN 109940044A
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Abstract
A kind of magnesium alloy plate electric-pulse cold rolling method, belongs to metal material processing field.It is characterized in milling step are as follows: the topping roll for 1. opening milling train turns to rotate counterclockwise, and velocity of rotation is 5 ~ 20r/min；2. opening high power pulsed source, the pulse power sets voltage as 50 ~ 400V, and pulse frequency is 100 ~ 1000Hz, and pulse width is 20 ~ 120 μ s, and application electric current is 2000 ~ 16000A, and output voltage is 0 ~ 30V；3. magnesium alloy plate is sent into 12 ~ 15 passage of mill milling, after rolling per pass, it is repeated two more times, total reduction is 40 ~ 80%；4. closing power supply, magnesium alloy plate is taken out；5. by after rolling magnesium alloy plate washes of absolute alcohol, dry.Advantage is: 1. controlling in the operation of rolling pulse current, pulsewidth, frequency, realizes safety in production.It does not need to be put into heating furnace to magnesium alloy plate and heat, realize high efficiency, low cost production.2. not needing to be put into heating furnace to magnesium alloy plate and heat, high efficiency, low cost production are realized.Electric pulse rolling can be achieved refinement crystal grain, promote magnesium alloy plate mechanical performance.3. electric pulse rolling can be achieved refinement crystal grain, promote magnesium alloy plate mechanical performance.
Description
Technical field
The invention belongs to metal material processing technical fields, are specifically related to a kind of magnesium alloy plate electric-pulse cold rolling method.
Background technique
Magnesium alloy plate is a kind of coloured light metal material, is answered in industrial circles such as electronics, space flight, aviation, instrument and meters
With extensive.Currently, removing pair rolling method, there are also special rolled methods, roll Ru asynchronous to there are many magnesium alloy plate milling methods
Preparation method, equal channel angular rolling method, accumulation pack rolling method etc., although above-mentioned each method makes magnesium alloy plate performance boost, but can all exist
Some shortcomings.
Summary of the invention
The present invention provides a kind of magnesium alloy plate electric-pulse cold rolling method, can Refining Mg Alloy grain size, elevating mechanism performance,
And safe operation, high production efficiency.
The invention is realized in this way as shown in Figure 1, the power up brush 5 being mounted in rolling-mill housing 12 by powering on brush holder 4
It is in contact with the upper surface of topping roll 1, the lower brush 9 and bottom roll 10 being mounted on by lower brush frame 8 in rolling-mill housing 12
Lower surface is in contact, and upper and lower brush 5,9 is in contact by conducting wire with high power pulsed source 6 respectively, high power pulsed source 6
It is connect with oscillograph 7, magnesium alloy plate 2 is sent between upper and lower roll 1,10 and is rolled, it is characterised in that milling method is such as
Under:
1, the topping roll 1 for opening milling train, turns to rotate counterclockwise, and velocity of rotation is 5 ~ 20r/min；
2, high power pulsed source 6 is opened, the pulse power sets voltage as 50 ~ 400V, and pulse frequency is 100 ~ 1000Hz, pulse
Width is 20 ~ 120 μ s, and application electric current is 2000 ~ 16000A, and output voltage is 0 ~ 30V；
3, magnesium alloy plate is sent into 12 ~ 15 passage of mill milling, after rolling per pass, be repeated two more times, total reduction is 40 ~ 80%；
4, power supply is closed, magnesium alloy plate is taken out；
5, by after rolling magnesium alloy plate washes of absolute alcohol, dry.
Advantages of the present invention and good effect are:
1. controlling in the operation of rolling pulse current, pulsewidth, frequency, safety in production is realized.
2. not needing to be put into heating furnace to magnesium alloy plate and heat, high efficiency, low cost production are realized.
3. electric pulse rolling can be achieved refinement crystal grain, promote magnesium alloy plate mechanical performance.
Detailed description of the invention
Fig. 1 is magnesium alloy plate electric-pulse cold rolling device schematic diagram
In figure: 1- topping roll, 2- magnesium alloy plate, 3- conveying roller, 4- power on brush holder, 5- power up brush, 6- high power pulsed source, 7-
Oscillograph, 8- lower brush frame, 9- lower brush, 10- bottom roll, 11 conveying rollers, 12- rolling-mill housing
Fig. 2 is AZ31 magnesium alloy tensile stress strain diagram
Fig. 3 is AZ31 magnesium alloy cross section metallographic structure figure after the rolling of the 14th passage electric pulse.
Specific embodiment
Roll AZ31 magnesium alloy sheet, length 100mm, width 10mm, with a thickness of 5mm；
As shown in Figure 1, specific implementation step is:
1, the topping roll 1 for opening roller mill, turns to rotate counterclockwise, revolving speed 5r/min；
2, high power pulsed source 6 is opened, the adjustment pulse power sets voltage as 380V, pulse frequency 700Hz, and pulse is wide
Degree is 50 μ s, and application electric current is 15000A；
3, AZ31 magnesium alloy plate feeding duo mill is rolled, rolls 14 passages, after rolling per pass, is repeated two more times, always
Reduction ratio is 60%；
4, power supply is closed, AZ31 magnesium alloy plate is removed；
5, it by the AZ31 magnesium alloy plate washes of absolute alcohol after rolling, is dried after cleaning.
Effect of rolling is AZ31 magnesium alloy plate metallographic structure crystallite dimension≤4 μm, and uniformity is good, and tensile strength reaches
310MPa。
Claims (1)
1. a kind of magnesium alloy plate electric-pulse cold rolling method, it is characterised in that milling method is as follows:
1. opening the topping roll (1) of milling train, turn to rotate counterclockwise, velocity of rotation is 5 ~ 20r/min；
2. opening high power pulsed source (6), the pulse power sets voltage as 50 ~ 400V, and pulse frequency is 100 ~ 1000Hz, arteries and veins
Rushing width is 20 ~ 120 μ s, and application electric current is 2000 ~ 16000A, and output voltage is 0 ~ 30V；
3. by magnesium alloy plate be sent into 12 ~ 15 passage of mill milling, per pass roll after, be repeated two more times, total reduction be 40 ~
80%；
4. closing power supply (6), magnesium alloy plate is taken out；
5. by after rolling magnesium alloy plate washes of absolute alcohol, dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910268849.XA CN109940044B (en) | 2019-04-04 | 2019-04-04 | Electric pulse cold rolling method for magnesium alloy plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910268849.XA CN109940044B (en) | 2019-04-04 | 2019-04-04 | Electric pulse cold rolling method for magnesium alloy plate |
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| CN109940044A true CN109940044A (en) | 2019-06-28 |
| CN109940044B CN109940044B (en) | 2021-07-20 |
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| CN201910268849.XA Active CN109940044B (en) | 2019-04-04 | 2019-04-04 | Electric pulse cold rolling method for magnesium alloy plate |
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Cited By (3)
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| 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 |
| CN112238140A (en) * | 2020-09-10 | 2021-01-19 | 北京科技大学 | Electric pulse treatment method for improving core structure of high-carbon steel rod wire |
| CN112742936A (en) * | 2020-11-27 | 2021-05-04 | 燕山大学 | Repeated bending mill set with electric auxiliary device |
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|---|---|---|---|---|
| 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 |
| CN112238140A (en) * | 2020-09-10 | 2021-01-19 | 北京科技大学 | Electric pulse treatment method for improving core structure of high-carbon steel rod wire |
| CN112238140B (en) * | 2020-09-10 | 2021-08-20 | 北京科技大学 | Electric pulse treatment method for improving core structure of high-carbon steel rod wire |
| CN112742936A (en) * | 2020-11-27 | 2021-05-04 | 燕山大学 | Repeated bending mill set with electric auxiliary device |
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| CN109940044B (en) | 2021-07-20 |
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