CN111389917A - Clad plate rolling device and method for realizing gradient tissue regulation and control - Google Patents
Clad plate rolling device and method for realizing gradient tissue regulation and control Download PDFInfo
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- CN111389917A CN111389917A CN202010221197.7A CN202010221197A CN111389917A CN 111389917 A CN111389917 A CN 111389917A CN 202010221197 A CN202010221197 A CN 202010221197A CN 111389917 A CN111389917 A CN 111389917A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 230000009467 reduction Effects 0.000 claims description 13
- 238000009966 trimming Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims 6
- 229910000861 Mg alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
Abstract
The invention belongs to the technical field of shroud plate rolling, and particularly relates to a shroud plate rolling device and method for realizing gradient tissue regulation. Heating the plate blank to a preset temperature in a heating furnace, preserving heat, preheating a roller to 200 ℃, and then inputting the plate blank into a rolling mill for carrying out first-time conventional flat rolling; rotating the plate blank clockwise by 90 degrees, placing the plate blank on a lining plate, keeping the temperature of the plate blank and the lining plate at a preset temperature for the same time, and then rolling the plate blank and the lining plate for a second pass; and S3, removing the lining plate, and rotating the rolled plate blank counterclockwise by 90 degrees for the third common flat rolling to finish rolling. The invention overcomes the problems of edge crack and poor plate shape of the plate and improves the yield of rolled pieces. The method is used for gradient tissue regulation and control of the shroud plate rolling.
Description
Technical Field
The invention belongs to the technical field of shroud plate rolling, and particularly relates to a shroud plate rolling device and method for realizing gradient tissue regulation.
Background
Magnesium alloy is the lightest applied metal material in the industry at present, has a series of characteristics of small density, high specific strength, good dimensional stability, good magnetic shielding property, excellent weldability and the like, and is becoming the most promising alloy material in the modern high and new technology field. The rolling is one of the most main shaping processing methods of the magnesium alloy plate, and the quality of the technology is directly related to the application prospect of the magnesium alloy plate.
The grain size has a great influence on the slip mechanism of magnesium alloys. Because the magnesium alloy has a close-packed Hexagonal (HCP) crystal structure, a slippage system is less at room temperature, deformation is mainly based on basal plane slippage, and the plastic deformation capability is poor, so that the defects of cracks, curls and the like are easy to appear in the rolling process, the rolling yield is low, and a large amount of qualified magnesium alloy plates are difficult to produce.
The edge grains of the rolled plate are refined, so that the rolled plate forms a certain tissue gradient from the edge to the central area, and the edge crack of the plate blank can be effectively prevented. For the traditional rolling method, a large shear strain exists between a roller and the magnesium alloy in the deformation process of a plate blank, so that a strong basal plane texture can be generated in a rolled plate, a conical surface sliding system is difficult to activate, the grain size of the plate blank cannot be effectively refined, the anisotropy of the plate blank is serious, the edge crack of the plate blank is serious, and the grain refining mechanism and the edge crack damage evolution law are researched to become difficulties and hot spots for rolling the magnesium alloy.
Disclosure of Invention
Aiming at the technical problems that the slab crystal grains cannot be refined and the edge crack is damaged, the invention provides the clad plate rolling device and the clad plate rolling method for realizing gradient structure regulation and control, which have the advantages of high yield, small error and small damage to the slab.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a realize shroud plate rolling device of gradient tissue regulation and control, includes welt, slab, the top at the welt is placed to the slab, be provided with the recess of two symmetries on the welt, the recess is constituteed through three tangent circular arcs.
The maximum depth of the groove is 0.5-3.0 mm, the radius of a circular arc of a transition area between the groove and the contact surface of the groove and the plate blank is the maximum depth of the groove, and the thickness of the liner plate is 2.5-10 mm.
The distance from the ridge of the joint of the contact surface of the groove and the slab to the central line of the lining plate is not less than 1/2 of the length of the slab.
The hardness of the lining plate is greater than that of the plate blank.
A method for rolling a clad plate for realizing gradient tissue regulation is characterized by comprising the following steps: comprises the following steps:
s1, heating the plate blank in a heating furnace to a preset temperature, preserving heat for 10-30 min, preheating a roller to 200 ℃, and then inputting the plate blank into a rolling mill for first-pass conventional flat rolling, wherein the reduction rate of the first pass is less than or equal to 10%;
s2, rotating the plate blank clockwise by 90 degrees, placing the plate blank on a lining plate with two symmetrical prefabricated grooves on the contact surface, preserving the heat of the plate blank and the lining plate at a preset temperature for the same time, then inputting the plate blank and the lining plate into a roller together for second-pass rolling, rolling the plate blank into a shape with two convexities consistent with the shape of the grooves of the lining plate, wherein the rolling reduction rate of the second pass is 20-30%;
s3, removing the lining plate, anticlockwise rotating the rolled plate blank by 90 degrees, carrying out third-pass common flat rolling, and finishing rolling, wherein the reduction rate of the third pass is 20-30%.
And the length and the width of the liner plate in the S2 are both larger than the size of the plate blank after the second pass of rolling.
And after the second pass of rolling of the plate blank in the S2 is finished, trimming is required to be carried out on the front end and the rear end of the plate blank deformed irregularly, and the cutting position is a convexity edge along one side close to the head-tail boundary line of the plate blank.
The third common flat rolling in the step S3 may adopt single-pass common flat rolling or multi-pass common flat rolling.
Compared with the prior art, the invention has the following beneficial effects:
the invention overcomes the problems of edge crack and poor plate shape of the plate and improves the yield of rolled pieces; the invention effectively ensures the rolling reduction and the rolling force of the edge of the rolled piece, ensures that the edge and the middle part of the rolled piece have different rolling rates, refines the grain size of the edge of the rolled piece, reduces the texture strength of the substrate, obviously improves the formability of the plate, weakens the texture of the substrate, and ensures that the plate blank shows better plasticity; the invention ensures that the middle part and the edge part of the plate blank present different grain size distributions, effectively realizes the tissue gradient regulation and control of the plate blank and improves the mechanical property of rolled pieces.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the operation of the present invention;
FIG. 3 is a schematic view of the edge cutting position of the slab after the second pass rolling according to the present invention;
wherein: 1 is a lining plate, 2 is a plate blank, and 3 is a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A clad plate rolling device for realizing gradient tissue regulation and control is shown in figure 1 and comprises a lining plate 1 and a plate blank 2, wherein the plate blank 2 is placed above the lining plate 1, two symmetrical grooves 3 are formed in the lining plate 1, and the grooves 3 are formed by three tangent circular arcs.
Further, preferably, the maximum depth of the groove 3 is 0.5-3.0 mm, the arc radius of the transition area between the groove 3 and the contact surface of the plate blank 2 is the maximum depth of the groove 3, and the thickness of the lining plate 1 is 2.5-10 mm.
Further, it is preferable that the distance from the ridge line of the joint of the contact surface of the groove 3 and the slab 2 to the center line of the liner plate 1 is not less than 1/2 of the length of the slab 2.
Further, the hardness of the lining board 1 is greater than that of the slab 2.
A method for rolling a clad plate to realize gradient tissue regulation, as shown in fig. 2, comprising the following steps:
s1, heating the plate blank in a heating furnace to a preset temperature, preserving heat for 10-30 min, preheating a roller to 200 ℃, and then inputting the plate blank into a rolling mill for first-pass conventional flat rolling, wherein the reduction rate of the first pass is less than or equal to 10%;
s2, rotating the plate blank clockwise by 90 degrees, placing the plate blank on a lining plate with two symmetrical prefabricated grooves on the contact surface, preserving the heat of the plate blank and the lining plate at a preset temperature for the same time, then inputting the plate blank and the lining plate into a roller together for second-pass rolling, rolling the plate blank into a shape with two convexities consistent with the shape of the grooves of the lining plate, wherein the rolling reduction rate of the second pass is 20-30%;
s3, removing the lining plate, anticlockwise rotating the rolled plate blank by 90 degrees, carrying out third-pass common flat rolling, and finishing rolling, wherein the reduction rate of the third pass is 20-30%.
Further, the length and width of the liner plate in the step S2 are both larger than the size of the plate blank after the second pass rolling.
Further, after the second pass of rolling of the slab in S2 is completed, the front and rear ends of the slab, which are deformed irregularly, need to be trimmed, and the position of the trimming is a convexity edge along one side close to the head-tail boundary line of the slab.
Further, the third ordinary flat rolling in S3 may be single-pass ordinary flat rolling or multi-pass ordinary flat rolling.
Examples
Selecting a rolled magnesium alloy of AZ31B type, wherein the specification of a blank is 100 × 100 × 15mm, the rolling speed is 0.1m/s, the hard alloy lining plate material is Cr12MOV steel, and the size of a working roll of a two-roll mill used for rolling the hard alloy lining plate material with the hardness of HRC 59 is phi 320 × 360 mm.
The structure of the lining plate used in rolling is as follows: r1、R2Radius of arc of the profile of the groove of the lining plate, R1＝R2＝50.5mm；H1Is the maximum depth of the groove of the lining plate H1＝2.0mm；R3For lining plate grooves and contact surfaces with metal slabsRadius of arc of transition zone of face, R3＝2.0mm；H2Is the thickness of the lining board H2＝6mm；L2Total length of liner plate, L2＝140mm；L1L distance from the liner plate center line of the liner plate groove and ridge at the junction with the contact surface of the slab1＝50mm。
The rolling method comprises the following process steps:
step one, heating a metal plate blank to 400 ℃ in a heating furnace, preserving heat for 15min, preheating a roller to 200 ℃, inputting the plate blank into a rolling mill for first-pass conventional flat rolling, wherein the pass reduction rate is1＝10％；
Step two, after the plate blank is rotated by 90 degrees clockwise, the plate blank is placed on a hard alloy lining plate with two symmetrical prefabricated grooves on the contact surface, the plate blank and the lining plate are kept warm for 15min at 400 ℃, then the plate blank and the lining plate are input into a roller together for second pass rolling, the plate blank is rolled into a shape with two convexity degrees which are consistent with the shape of the grooves of the lining plate, and the pass reduction rate is2＝25％；
Thirdly, trimming the front end and the rear end of the plate blank deformed irregularly, wherein the trimming position is a convexity edge close to one side of the head-tail boundary line of the plate blank, as shown in fig. 3;
step four, removing the lining plate, anticlockwise rotating the rolled plate blank by 90 degrees, and carrying out third common flat rolling, wherein the pass reduction rate is3The rolling was completed at 25%.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (8)
1. The utility model provides a realize shroud plate rolling device of gradient tissue regulation and control which characterized in that: including welt (1), slab (2), place the top at welt (1) slab (2), be provided with recess (3) of two symmetries on welt (1), recess (3) constitute through three tangent circular arcs.
2. The clad plate rolling device for realizing gradient tissue regulation and control of claim 1, wherein: the maximum depth of the groove (3) is 0.5-3.0 mm, the arc radius of the transition area between the groove (3) and the contact surface of the plate blank (2) is the maximum depth of the groove (3), and the thickness of the lining plate (1) is 2.5-10 mm.
3. The clad plate rolling device for realizing gradient tissue regulation and control of claim 1, wherein: the distance from the ridge of the joint of the contact surface of the groove (3) and the slab (2) to the center line of the lining plate (1) is not less than 1/2 of the length of the slab (2).
4. The clad plate rolling device for realizing gradient tissue regulation and control of claim 1, wherein: the hardness of the lining plate (1) is greater than that of the slab (2).
5. A method for rolling a clad plate for realizing gradient tissue regulation is characterized by comprising the following steps: comprises the following steps:
s1, heating the plate blank in a heating furnace to a preset temperature, preserving heat for 10-30 min, preheating a roller to 200 ℃, and then inputting the plate blank into a rolling mill for first-pass conventional flat rolling, wherein the reduction rate of the first pass is less than or equal to 10%;
s2, rotating the plate blank clockwise by 90 degrees, placing the plate blank on a lining plate with two symmetrical prefabricated grooves on the contact surface, preserving the heat of the plate blank and the lining plate at a preset temperature for the same time, then inputting the plate blank and the lining plate into a roller together for second-pass rolling, rolling the plate blank into a shape with two convexity degrees consistent with the shape of the grooves of the lining plate, wherein the reduction rate of the second-pass is 20-30%;
and S3, removing the lining plate, anticlockwise rotating the rolled plate blank by 90 degrees for the third common flat rolling to finish rolling, wherein the reduction rate of the third pass is 20-30%.
6. The method for rolling the cladding plate for realizing the gradient structure regulation and control as claimed in claim 5, wherein the step of rolling the cladding plate comprises the following steps: and the length and the width of the liner plate in the S2 are both larger than the size of the plate blank after the second pass of rolling.
7. The method for rolling the cladding plate for realizing the gradient structure regulation and control as claimed in claim 5, wherein the step of rolling the cladding plate comprises the following steps: and after the second pass of rolling of the plate blank in the S2 is finished, trimming is required to be carried out on the front end and the rear end of the plate blank deformed irregularly, and the cutting position is a convexity edge along one side close to the head-tail boundary line of the plate blank.
8. The method for rolling the cladding plate for realizing the gradient structure regulation and control as claimed in claim 5, wherein the step of rolling the cladding plate comprises the following steps: the third common flat rolling in the step S3 may adopt single-pass common flat rolling or multi-pass common flat rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010221197.7A CN111389917B (en) | 2020-03-26 | 2020-03-26 | Clad plate rolling device and method for realizing gradient tissue regulation and control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010221197.7A CN111389917B (en) | 2020-03-26 | 2020-03-26 | Clad plate rolling device and method for realizing gradient tissue regulation and control |
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| CN111389917A true CN111389917A (en) | 2020-07-10 |
| CN111389917B CN111389917B (en) | 2022-04-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953322A (en) * | 2021-09-29 | 2022-01-21 | 西安交通大学 | Differential temperature cross rolling process for improving high-anisotropy high-strength magnesium alloy plate |
| CN114453416A (en) * | 2021-07-23 | 2022-05-10 | 哈尔滨理工大学 | Rolling method for regulating and controlling thick-direction tissue gradient of plate by using heterogeneous lining plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07100507A (en) * | 1993-10-01 | 1995-04-18 | Nippon Steel Corp | Control rolling method for steel plate excellent in homogeneity in steel plate |
| CN102000695A (en) * | 2010-09-21 | 2011-04-06 | 重庆大学 | Rolling method of sheet metal |
| CN103962376A (en) * | 2014-03-29 | 2014-08-06 | 吉林大学 | Large reduction rolling method for magnesium alloy |
| CN105234189A (en) * | 2015-11-13 | 2016-01-13 | 北京首钢自动化信息技术有限公司 | Slab sickle bending control system and method used for roughing mill |
| CN106862269A (en) * | 2017-03-24 | 2017-06-20 | 重庆大学 | It is a kind of to suppress the method that magnesium alloy plate edge splits |
-
2020
- 2020-03-26 CN CN202010221197.7A patent/CN111389917B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07100507A (en) * | 1993-10-01 | 1995-04-18 | Nippon Steel Corp | Control rolling method for steel plate excellent in homogeneity in steel plate |
| CN102000695A (en) * | 2010-09-21 | 2011-04-06 | 重庆大学 | Rolling method of sheet metal |
| CN103962376A (en) * | 2014-03-29 | 2014-08-06 | 吉林大学 | Large reduction rolling method for magnesium alloy |
| CN105234189A (en) * | 2015-11-13 | 2016-01-13 | 北京首钢自动化信息技术有限公司 | Slab sickle bending control system and method used for roughing mill |
| CN106862269A (en) * | 2017-03-24 | 2017-06-20 | 重庆大学 | It is a kind of to suppress the method that magnesium alloy plate edge splits |
Non-Patent Citations (1)
| Title |
|---|
| 叶凤华等: "衬板轧制动漫设计用AZ61合金的组织与性能研究", 《热加工工艺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453416A (en) * | 2021-07-23 | 2022-05-10 | 哈尔滨理工大学 | Rolling method for regulating and controlling thick-direction tissue gradient of plate by using heterogeneous lining plate |
| CN113953322A (en) * | 2021-09-29 | 2022-01-21 | 西安交通大学 | Differential temperature cross rolling process for improving high-anisotropy high-strength magnesium alloy plate |
| CN113953322B (en) * | 2021-09-29 | 2023-08-15 | 西安交通大学 | Differential temperature cross rolling process for improving high-anisotropy high-strength magnesium alloy plate |
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| CN111389917B (en) | 2022-04-15 |
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