CN110293130A - A kind of method that oblique corrugation inhibits magnesium alloy plate edge to split - Google Patents
A kind of method that oblique corrugation inhibits magnesium alloy plate edge to split Download PDFInfo
- Publication number
- CN110293130A CN110293130A CN201910431887.2A CN201910431887A CN110293130A CN 110293130 A CN110293130 A CN 110293130A CN 201910431887 A CN201910431887 A CN 201910431887A CN 110293130 A CN110293130 A CN 110293130A
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- Prior art keywords
- magnesium alloy
- alloy plate
- rolling
- split
- corrugation
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention belongs to magnesium alloy preparation process fields, and in particular to a kind of method that oblique corrugation inhibits magnesium alloy plate edge to split.AZ31B magnesium alloy plate is kept the temperature into 15min at 350 DEG C, first the first passage AZ31B magnesium alloy plate is carried out using oblique wave corrugation rolls to roll, here biggish deflection is set, it is sufficiently broken to magnesium alloy plate crystal grain, and the extremely strong basal plane texture for effectively avoiding rolling large deformation from generating, improve the subsequent aptitude to rolling of plate.After melting down heating, reuses plain-barreled roll and carry out the rolling of the second passage AZ31B magnesium alloy plate, can finally prepare side and split less magnesium alloy plate.Applied widely and simple process of the invention is easy to control, at low cost, is macroscopically the generation for weakening or inhibiting magnesium alloy plate edge tensile stress；It is to weaken basal plane texture on microcosmic, improves its roll forming.
Description
Technical field
The invention belongs to magnesium alloy preparation process fields, and in particular to the oblique corrugation of one kind inhibits magnesium alloy plate edge to split
Method.
Background technique
Magnesium alloy is one of the structural metallic materials of state key development in recent years, with light weight, specific strength height, bullet
The advantages that property modulus is big, while there are the performances such as good damping noise reduction and shock resistance, it is widely applied to national economy and work
The numerous areas such as industry production.Magnesium alloy Study on key technical problems is carried out in a deep going way, to solving current energy resource structure, the industrial structure
Outstanding problem has very important significance.
Rolling is to produce one of the common method of magnesium alloy plate, which can improve its mechanics with thinning microstructure
Performance, and the advantage with continuous batch production.It is split however, side easily occurs during the rolling process in magnesium alloy plate, thus
The a large amount of trimming waste materials generated have seriously affected the lumber recovery and stock utilization of magnesium alloy plate, limit and constrain the material
Further development.
Problem is split for the side occurred in the magnesium alloy plate operation of rolling, researchers were using on-line heating, packet in recent years
The methods of rolling, liner plate rolling, asymmetrical rolling, prefabricated convexity, model prediction is covered to grind magnesium alloy plate roll forming
Study carefully, achieve positive effect, to prepare boundless split or magnesium alloy plate that few side is split provides possibility, industrialized production general
Bring huge economic benefit.
It is analyzed from macroscopic perspective, rolling temperature, reduction system, mill speed and stress state etc. are all to magnesium alloy plate
Have an impact while splitting；From microcosmic angle analyze, the side of magnesium alloy plate split and with crystal structure, texture, structural homogenity, twin and
The interwovenesses such as brittlement phase.
After searching and discovering the prior art, it is mainly the following the production work for inhibiting magnesium alloy plate edge to split at present
Skill: the Chinese patent " a kind of preparation method of aluminium cladding magnesium alloy composite board " and Publication No. of Publication No. CN108480399A
The Chinese patent " a kind of method of efficient rolling Mg-Al-Zn system magnesium alloy " of CN103388116A, both sets about from raw material
The side slowed down or eliminate magnesium alloy plate is split, but the process is more complicated；The Chinese patent " one of Publication No. CN103962376A
Kind magnesium alloy heavy reduction rolling method " it records, liner plate rolling can effectively solve the problems, such as that magnesium alloy plate rolled edge is split, but its
Plate specification is restricted；" tendency is split on a kind of reduction magnesium alloy rolling side to the Chinese patent of Publication No. CN108311543A
Special-shaped roll, milling train and method ", it is limited using the lower roll of raised upper roller and groove in the magnesium alloy plate operation of rolling
Laterally free extension, and then reduce the generation and extension of edge cracks, but the limitation of its equipment makes it be difficult to answer on a large scale
With.In addition, the technologies such as tandem rolling, asymmetrical rolling have remarkable effect in terms of magnesium alloy plate crystal grain refinement, but after rolling
Plate the problems such as splitting serious and anisotropy protrusion there are still side.
The present invention provides a kind of methods that oblique corrugation inhibits magnesium alloy plate edge to split, and can effectively overcome the prior art
Bottleneck, solve existing issue.
Summary of the invention
The present invention is intended to provide a kind of method that oblique corrugation inhibits magnesium alloy plate edge to split.
The present invention is achieved by the following technical solutions: a kind of method that oblique corrugation inhibits magnesium alloy plate edge to split,
The following steps are included:
Step 1, magnesium alloy plate preheats:
Specification magnesium alloy plate is kept the temperature into 15min in the heating furnace that temperature is 350 DEG C；
Step 2, first ripple rolling system of magnesium alloy plate:
Magnesium alloy plate after heating is carried out to first rolling on milling train, top and bottom rolls are oblique wave corrugation rolls, and on
Roller wave crest is corresponding with lower roll trough, mill speed 0.1m/s；
Step 3, magnesium alloy plate melts down heating:
Magnesium alloy plate after first passes is put back to heating furnace to continue to keep the temperature 15min at 350 DEG C；
Step 4, the second passage of magnesium alloy plate flat rolling:
Magnesium alloy plate after heating is carried out to second time rolling on milling train, top and bottom rolls are plain-barreled roll, and mill speed is
0.1m/s finally obtains the magnesium alloy plate with a thickness of 1.05mm.
Magnesium alloy plate is kept the temperature into 15min at 350 DEG C, first carries out the first passage magnesium alloy plate using oblique wave corrugation rolls
Rolling, sets biggish deflection here, sufficiently broken to magnesium alloy plate crystal grain, and rolling large deformation is effectively avoided to generate
Extremely strong basal plane texture improves the subsequent aptitude to rolling of plate.After melting down heating, reuses plain-barreled roll and carry out the second passage magnesium alloy plate
Rolling, can finally prepare side and split less magnesium alloy plate.
As the further improvement of technical solution of the present invention, the magnesium alloy plate is by the raw material of following weight percent
It constitutes: Al 3.2%, Si 0.07%, Ca 0.04%, Zn 1.4%, Mn 0.7%, Cu 0.01%, magnesium surplus.
As the further improvement of technical solution of the present invention, the roller diameter of the oblique wave corrugation rolls and plain-barreled roll is 95mm.Institute
State Luo Xuan Jiao≤45o of corrugation rolls, and < 90o.
Invention further provides the magnesium for the method preparation for inhibiting magnesium alloy plate edge to split by the oblique corrugation of described one kind
Sheet alloy.
The beneficial effects of the present invention are: applied widely and simple process of the invention is easy to control, at low cost, macroscopically
It is the generation for weakening or inhibiting magnesium alloy plate edge tensile stress；It is to weaken basal plane texture on microcosmic, improves its roll forming.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the main view (cross-sectional view) of upper corrugation rolls.
Fig. 2 is the main view (cross-sectional view) of lower corrugation rolls.
Fig. 3 is the main view (cross-sectional view) of upper and lower plain-barreled roll.
Fig. 4 is the shaft side figure of upper corrugation rolls.
Fig. 5 is the shaft side figure of lower corrugation rolls.
Fig. 6 is the schematic diagram of first ripple rolling.
Fig. 7 is the schematic diagram of the second passage flat rolling.
Fig. 8 is corrugation rolls-plain-barreled roll joint rolling preparation magnesium alloy plate picture.
Fig. 9 is plain-barreled roll-plain-barreled roll joint rolling preparation magnesium alloy plate picture.
Figure 10 is corrugation rolls-plain-barreled roll joint rolling preparation magnesium alloy plate metallograph.As seen from the figure: in tissue
There is mixed grain structure, coarse-grain and fine grain are layered, and this tissue can take into account intensity and plasticity, obtain magnesium alloy plate excellent
Comprehensive mechanical property.
Figure 11 is plain-barreled roll-plain-barreled roll joint rolling preparation magnesium alloy plate metallograph.As seen from the figure: brilliant in tissue
Grain is relatively uniform, and grain size is similar with the coarse-grain in the line and staff control that corrugation rolls-plain-barreled roll joint rolling obtains.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Technical solution of the present invention is described in detail with reference to the accompanying drawing.
The method that embodiment 1, corrugation rolls-plain-barreled roll joint rolling prepare magnesium alloy plate
Step 1, magnesium alloy plate preheats.
Be 100*60*3(unit: mm by specification) AZ31B magnesium alloy plate in temperature be to be kept the temperature in 350 DEG C of heating furnace
15min。
Step 2, first ripple rolling system of magnesium alloy plate.
Magnesium plate after heating is subjected to first rolling on the milling train that roller diameter is Φ 95mm, top and bottom rolls are oblique wave
Corrugation rolls (wherein upper roller wave crest is corresponding with lower roll trough), mill speed 0.1m/s.
Step 3, magnesium alloy plate melts down heating.
AZ31B magnesium alloy plate after first passes is put back to heating furnace to continue to keep the temperature 15min at 350 DEG C.
Step 4, the second passage of magnesium alloy plate flat rolling.
Magnesium plate after heating is subjected to second time rolling on the milling train that roller diameter is Φ 95mm, top and bottom rolls are flat
Roller, mill speed 0.1m/s, the magnesium alloy plate after finally obtaining rolling measure it with a thickness of 1.05mm.
In this embodiment, AZ31B magnesium alloy plate is made of the raw material of following weight percent: Al 3.2%, Si
0.07%, Ca 0.04%, Zn 1.4%, Mn 0.7%, Cu 0.01%, magnesium surplus.
The method that comparative example 1, plain-barreled roll-plain-barreled roll joint rolling prepare magnesium alloy plate
Step 1, magnesium alloy plate preheats.
Be 100*60*3(unit: mm by specification) AZ31B magnesium alloy plate in temperature be to be kept the temperature in 350 DEG C of heating furnace
15min。
Step 2, the first passage of magnesium alloy plate flat rolling.
Magnesium plate after heating is subjected to first rolling on the milling train that roller diameter is Φ 95mm, top and bottom rolls are flat
Roller, mill speed 0.1m/s.
Step 3, magnesium alloy plate melts down heating.
AZ31B magnesium alloy plate after first passes is put back to heating furnace to continue to keep the temperature 15min at 350 DEG C.
Step 4, the second passage of magnesium alloy plate flat rolling.
Magnesium plate after heating is subjected to second time rolling on the milling train that roller diameter is Φ 95mm, top and bottom rolls are flat
Roller, mill speed 0.1m/s, the magnesium alloy plate after finally obtaining rolling measure it with a thickness of 1.07mm.
The results show that split using the magnesium alloy plate edge of corrugation rolls-plain-barreled roll joint rolling preparation it is less, as shown in figure 8, and
Using plain-barreled roll-plain-barreled roll joint rolling preparation magnesium alloy plate, there are more serious sides to split, as shown in figure 9, in the comparative example
In, the specific ingredient of AZ31B magnesium alloy plate is the same as embodiment 1.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (5)
1. a kind of method that oblique corrugation inhibits magnesium alloy plate edge to split, which comprises the following steps:
Step 1, magnesium alloy plate preheats:
Specification magnesium alloy plate is kept the temperature into 15min in the heating furnace that temperature is 350 DEG C；
Step 2, first ripple rolling system of magnesium alloy plate:
Magnesium alloy plate after heating is carried out to first rolling on milling train, top and bottom rolls are oblique wave corrugation rolls, and on
Roller wave crest is corresponding with lower roll trough, mill speed 0.1m/s；
Step 3, magnesium alloy plate melts down heating:
Magnesium alloy plate after first passes is put back to heating furnace to continue to keep the temperature 15min at 350 DEG C；
Step 4, the second passage of magnesium alloy plate flat rolling:
Magnesium alloy plate after heating is carried out to second time rolling on milling train, top and bottom rolls are plain-barreled roll, and mill speed is
0.1m/s finally obtains the magnesium alloy plate with a thickness of 1.05mm.
2. the method that the oblique corrugation of one kind according to claim 1 inhibits magnesium alloy plate edge to split, which is characterized in that described
Magnesium alloy plate is made of the raw material of following weight percent: Al 3.2%, Si 0.07%, Ca 0.04%, Zn 1.4%, Mn
0.7%, Cu 0.01%, magnesium surplus.
3. the method that the oblique corrugation of one kind according to claim 1 or 2 inhibits magnesium alloy plate edge to split, which is characterized in that
Luo Xuan Jiao≤45o of the corrugation rolls, and < 90o.
4. the magnesium for the method preparation for inhibiting magnesium alloy plate edge to split by the oblique corrugation of the described one kind of any one of claims 1 or 2 closes
Golden plate material.
5. the magnesium alloy plate for the method preparation that the oblique corrugation of one kind as described in claim 3 inhibits magnesium alloy plate edge to split.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431887.2A CN110293130A (en) | 2019-05-23 | 2019-05-23 | A kind of method that oblique corrugation inhibits magnesium alloy plate edge to split |
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| CN201910431887.2A CN110293130A (en) | 2019-05-23 | 2019-05-23 | A kind of method that oblique corrugation inhibits magnesium alloy plate edge to split |
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| CN110293130A true CN110293130A (en) | 2019-10-01 |
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| CN201910431887.2A Pending CN110293130A (en) | 2019-05-23 | 2019-05-23 | A kind of method that oblique corrugation inhibits magnesium alloy plate edge to split |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399520A (en) * | 2021-07-13 | 2021-09-17 | 太原理工大学 | Processing production device for high-strength plastic large-size magnesium alloy sheet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829676A (en) * | 2010-04-09 | 2010-09-15 | 江苏时代华宜电子科技有限公司 | Rolling process for molybdenum billet plate |
| CN102409273A (en) * | 2011-11-02 | 2012-04-11 | 中南大学 | Method for weakening cardinal plane texture of magnesium alloy plate strip |
| CN105478476A (en) * | 2016-01-21 | 2016-04-13 | 太原科技大学 | Method for rolling metal composite plate strip |
| CN105755411B (en) * | 2016-04-25 | 2017-08-25 | 重庆科技学院 | The method for weakening magnesium alloy plate texture |
| CN106995908B (en) * | 2016-01-22 | 2018-07-20 | 中国科学院金属研究所 | A kind of efficient rolling method of weak non-textured magnesium alloy plate |
| CN109570233A (en) * | 2018-12-13 | 2019-04-05 | 沈阳理工大学 | A kind of non-homogeneous milling method of periodicity weakening magnesium alloy plate texture |
-
2019
- 2019-05-23 CN CN201910431887.2A patent/CN110293130A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829676A (en) * | 2010-04-09 | 2010-09-15 | 江苏时代华宜电子科技有限公司 | Rolling process for molybdenum billet plate |
| CN102409273A (en) * | 2011-11-02 | 2012-04-11 | 中南大学 | Method for weakening cardinal plane texture of magnesium alloy plate strip |
| CN102409273B (en) * | 2011-11-02 | 2013-03-20 | 中南大学 | Method for weakening cardinal plane texture of magnesium alloy plate strip |
| CN105478476A (en) * | 2016-01-21 | 2016-04-13 | 太原科技大学 | Method for rolling metal composite plate strip |
| CN106995908B (en) * | 2016-01-22 | 2018-07-20 | 中国科学院金属研究所 | A kind of efficient rolling method of weak non-textured magnesium alloy plate |
| CN105755411B (en) * | 2016-04-25 | 2017-08-25 | 重庆科技学院 | The method for weakening magnesium alloy plate texture |
| CN109570233A (en) * | 2018-12-13 | 2019-04-05 | 沈阳理工大学 | A kind of non-homogeneous milling method of periodicity weakening magnesium alloy plate texture |
Non-Patent Citations (1)
| Title |
|---|
| 张丁非等: "《高性能镁合金晶粒细化新技术》", 31 January 2016, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399520A (en) * | 2021-07-13 | 2021-09-17 | 太原理工大学 | Processing production device for high-strength plastic large-size magnesium alloy sheet |
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