CN112008056A - High-speed steel roll and casting method thereof - Google Patents
High-speed steel roll and casting method thereof Download PDFInfo
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- CN112008056A CN112008056A CN202011171359.7A CN202011171359A CN112008056A CN 112008056 A CN112008056 A CN 112008056A CN 202011171359 A CN202011171359 A CN 202011171359A CN 112008056 A CN112008056 A CN 112008056A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
Abstract
The invention discloses a casting method of a high-speed steel roller, which comprises the following steps: s1, casting an outer layer: pouring outer molten steel into the roller body casting mould box in a centrifugal casting mode, and forming an outer layer after solidification; s2, casting the middle layer: pouring molten steel of the middle layer into a roller body casting mould box in a centrifugal casting mode, and forming the middle layer after solidification; s3, casting of a roller core: and coaxially stacking and fixing the roll neck mold casting box, the roll body mold casting box and the bottom mold casting box from top to bottom, then pouring molten steel of the roll core in a static casting mode, then melting the intermediate layer, mixing the molten steel of the roll core with the molten steel of the roll core, and forming the roll core after solidification. The method is simple to operate, the outer layer is centrifugally cast firstly, then the middle layer is cast, and finally the middle layer is melted and mixed with molten steel of the roller core when the roller core is cast, so that the bonding strength of the roller core and the outer layer is improved.
Description
Technical Field
The invention belongs to the technical field of roll casting, and particularly relates to a high-speed steel roll and a casting method thereof.
Background
With the development of the steel industry, high-speed steel rolls are widely used for wire rods, strip steel and section steel finish rolling frames, and the high wear resistance and the accident resistance of the high-speed steel rolls are determined.
Chinese patent CN110125370A discloses a method for manufacturing a heat-resistant composite roller for an ultrathin cast-rolling strip steel rolling mill, wherein the heat-resistant composite roller is formed by compounding a roller core material and an outer layer material; the material of the roller core is nodular cast iron, and the material of the outer layer is heat-resistant high-speed steel; smelting an outer layer material, then blowing argon for purification treatment, smelting a roller core material, then carrying out spheroidization and inoculation treatment, casting outer layer material molten steel by using a centrifugal casting method, and casting roller core material molten iron by using a static casting method after the outer layer material molten steel is solidified; after casting, cooling to the box opening temperature, taking out the composite roller, then carrying out heat treatment and machining, and obtaining a finished product after passing inspection.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides a casting method of the high-speed steel roll, and the high-speed steel roll produced by the casting method of the high-speed steel roll has the advantages of high bonding strength and high yield.
The casting method of the high-speed steel roller comprises the following steps: s1, casting an outer layer: pouring outer molten steel into the roller body casting mould box in a centrifugal casting mode, and forming an outer layer after solidification; s2, casting the middle layer: pouring molten steel of the middle layer into a roller body casting mould box in a centrifugal casting mode, and forming the middle layer after solidification; s3, casting of a roller core: and coaxially stacking and fixing the roll neck mold casting box, the roll body mold casting box and the bottom mold casting box from top to bottom, then pouring molten steel of the roll core in a static casting mode, then melting the intermediate layer, mixing the molten steel of the roll core with the molten steel of the roll core, and forming the roll core after solidification.
The casting method of the high-speed steel roller is simple to operate, the outer layer is centrifugally cast, the middle layer is then cast, and the middle layer is melted and mixed with molten steel of the roller core when the roller core is cast, so that the bonding strength of the roller core and the outer layer is improved.
According to an embodiment of the present invention, before the step S1, the method further includes: s00, modeling: and respectively molding a roll body mold box, a roll neck mold box and a bottom mold box by using molding sand according to the size and the shape of the roll.
Before the step S1, and after the step S00, according to an embodiment of the present invention, the method further includes: s01, smelting: and smelting outer-layer molten steel, middle-layer molten steel and roller core molten steel in an intermediate frequency furnace, wherein the middle-layer molten steel and the roller core molten steel are smelted in the same furnace.
According to one embodiment of the invention, the outer layer has a solidification rate of 10mm/min during centrifugal casting, the temperature of the outer layer is 1230-1250 ℃ during casting of the intermediate layer, and the temperature of the intermediate layer is 1050-1100 ℃ during casting of the roll core.
According to an embodiment of the present invention, in the step S2, the thickness of the intermediate layer is 8-12 mm.
According to an embodiment of the invention, in the step S01, after the middle layer molten steel and the roller core molten steel are smelted in the same furnace, the middle layer molten steel is taken out at 1440 ℃ of 1400-.
According to an embodiment of the invention, in the step S01, the molten steel of the roller core is taken out of the furnace at 1520-.
According to one embodiment of the invention, when the intermediate layer molten steel and the roller core molten steel are smelted in the same furnace, the contents of the alloy elements and the weight percentages are as follows: 2.8 to 3.2 percent of C, 1.2 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, less than or equal to 0.2 percent of Cr, less than or equal to 0.1 percent of Mo, 0.2 to 0.6 percent of Ni, less than or equal to 0.08 percent of P, and less than or equal to 0.02 percent of S.
According to one embodiment of the invention, the high-speed steel roll comprises the following alloy elements in percentage by weight: 1.5 to 2.0 percent of C, 0.4 to 1.0 percent of Si, 0.3 to 0.8 percent of Mn, 3.0 to 6.0 percent of Cr, 3.0 to 6.0 percent of Mo, 0.3 to 1.0 percent of Ni, 3.0 to 6.0 percent of V, 1.0 to 4.0 percent of W, less than or equal to 0.05 percent of P, less than or equal to 0.02 percent of S, and the balance of iron and inevitable impurities.
According to one embodiment of the invention, the roll core further comprises the following alloy components in percentage by weight: 2.8 to 3.2 percent of C, 2.2 to 2.5 percent of Si, 0.3 to 0.8 percent of Mn, less than or equal to 0.2 percent of Cr, less than or equal to 0.1 percent of Mo, 0.2 to 0.6 percent of Ni, less than or equal to 0.08 percent of P, less than or equal to 0.02 percent of S, 0.035 to 0.07 percent of Mg, 0.01 to 0.03 percent of Re, and the balance of iron and inevitable impurities.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The casting method of the high-speed steel roll according to the embodiment of the present invention is specifically described below.
The casting method of the high-speed steel roller comprises the following steps:
s00, modeling: molding a roll body mold box, a roll neck mold box and a bottom mold box by using molding sand according to the size and the shape of the roll;
s01, smelting: smelting outer-layer molten steel, middle-layer molten steel and roller core molten steel in an intermediate frequency furnace, wherein the middle-layer molten steel and the roller core molten steel are smelted in the same furnace;
s1, casting an outer layer: pouring outer molten steel into the roller body casting mould box in a centrifugal casting mode, and forming an outer layer after solidification;
s2, casting the middle layer: pouring molten steel of the middle layer into the roller body casting box in a centrifugal casting mode, solidifying to form the middle layer, and casting the middle layer at the temperature of 1230-1250 ℃;
s3, casting of a roller core: the roll neck casting box, the roll body casting box and the bottom casting box are coaxially stacked and fixed from top to bottom, then molten steel of a roll core is poured in a static pouring mode, then the middle layer is melted and mixed with the molten steel of the roll core, the roll core is formed after solidification, and when the roll core is poured, the temperature of the middle layer is 1050-.
Therefore, the method is simple to operate, the outer layer is centrifugally cast firstly, then the middle layer is cast, and finally the middle layer is melted and mixed with molten steel of the roller core when the roller core is cast, so that the bonding strength of the roller core and the outer layer is improved, the connection strength between the middle layer and the outer layer is improved under the condition of not corroding the working thickness of the outer layer by setting reasonable casting temperatures of the middle layer and the roller core, and meanwhile, the roller core and the middle layer can be completely melted.
In some embodiments of the invention, the outer layer has a solidification rate of 10mm/min during centrifugal casting.
In some embodiments of the present invention, in step S2, the thickness of the intermediate layer is 8-12mm, which facilitates complete melting and mixing with the molten steel of the roll core during casting of the molten steel of the roll core, and also facilitates rapid solidification and high manufacturing efficiency during centrifugal casting with a thickness of 8-12 mm.
Further, in step S01, after the middle layer molten steel and the roller core molten steel are smelted in the same furnace, the middle layer molten steel is discharged at 1440 ℃ of 1400-. At the moment, the temperature of the outer layer is 1230-1250 ℃, and the casting temperature of the middle layer is slightly higher than that of the outer layer due to the fact that the outer layer is a working layer, so that the connection between the inner surface of the outer layer and the middle layer is facilitated when the middle layer is cast, and the connection strength is high; when the casting temperature of the middle layer is lower than that of the outer layer, the obvious layering phenomenon can be generated in the casting middle layer, and the connection strength is low; when the casting temperature in intermediate level was great higher than outer temperature, outer inside can melt, and then influences the intensity of outer during operation, and the thickness of outer conduct working layer also can reduce simultaneously to cause the product unqualified.
Further, in step S01, the molten steel of the roller core is taken out of the furnace at 1520-. At the moment, the temperature of the middle layer is 1050-.
Preferably, when the intermediate layer molten steel and the roller core molten steel are smelted in the same furnace, the alloy elements and the weight percentage contents are as follows: 2.8 to 3.2 percent of C, 1.2 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, less than or equal to 0.2 percent of Cr, less than or equal to 0.1 percent of Mo, 0.2 to 0.6 percent of Ni, less than or equal to 0.08 percent of P, and less than or equal to 0.02 percent of S. By smelting the molten steel of the middle layer and the molten steel of the roller core in the same furnace and continuously heating the molten steel of the roller core after the molten steel of the middle layer is discharged from the furnace, the production sequence is more met, the production cost is effectively reduced, and the production efficiency is improved.
The high-speed steel roll comprises an outer layer and a roll core, wherein the outer layer comprises the following alloy elements in percentage by weight: 1.5 to 2.0 percent of C, 0.4 to 1.0 percent of Si, 0.3 to 0.8 percent of Mn, 3.0 to 6.0 percent of Cr, 3.0 to 6.0 percent of Mo, 0.3 to 1.0 percent of Ni, 3.0 to 6.0 percent of V, 1.0 to 4.0 percent of W, less than or equal to 0.05 percent of P, less than or equal to 0.02 percent of S, and the balance of iron and inevitable impurities. The roll core comprises the following alloy components in percentage by weight: 2.8 to 3.2 percent of C, 2.2 to 2.5 percent of Si, 0.3 to 0.8 percent of Mn, less than or equal to 0.2 percent of Cr, less than or equal to 0.1 percent of Mo, 0.2 to 0.6 percent of Ni, less than or equal to 0.08 percent of P, less than or equal to 0.02 percent of S, 0.035 to 0.07 percent of Mg, 0.01 to 0.03 percent of Re, and the balance of iron and inevitable impurities.
Example one
The casting method of the high-speed steel roller of the embodiment of the invention is adopted to prepare a roller with the diameter of 360 mm and the diameter of 650 mm.
Comparative example 1
A roller of 360X 650mm diameter was produced without casting the intermediate layer, the other casting steps remaining the same as in the example.
Example two
A roller with the diameter of 440 mm multiplied by 960mm is prepared by adopting the casting method of the high-speed steel roller of the embodiment of the invention.
Comparative example No. two
A440X 960mm diameter roll was prepared without casting the interlayer, and the other casting steps were identical to those of example two.
EXAMPLE III
The casting method of the high-speed steel roller of the embodiment of the invention is adopted to prepare a roller with the diameter of 600 mm multiplied by 800 mm.
Comparative example No. three
A600X 800mm diameter roll was prepared without casting the intermediate layer, and the other casting steps were identical to those of example three.
Comparison table for roller with one and three different specifications
| Case(s) | Product specification/mm | Outer layer thickness/mm | Outer layer rotation time/min | Outer temperature measurement/° c | Intermediate layer temperature/deg.C | Shutdown temperature/. degree.C | temperature/deg.C of roll core | Flaw detection | Bonding strength/Mpa |
| Example 1 | 360×650 | 90 | 8.5 | 1240 | 1290 | 1080 | 1415 | Defect free | 330 |
| Comparative example 1 | 360×650 | 90 | 8.5 | 1240 | Is free of | Is free of | 1415 | Defect free | 260 |
| Example 2 | 440×960 | 70 | 6.5 | 1230 | 1300 | 1100 | 1420 | Defect free | 350 |
| Comparative example 2 | 440×960 | 70 | 6.5 | 1230 | Is free of | Is free of | 1420 | Outer layer eroded by roller core | 282 |
| Example 3 | 600×800 | 120 | 13 | 1220 | 1310 | 1070 | 1410 | Defect free | 320 |
| Comparative example 3 | 600×800 | 120 | 13 | 1220 | Is free of | Is free of | 1410 | Defect free | 255 |
In conclusion, the roll prepared by the casting method of the high-speed steel roll has high connection strength between the outer layer and the roll core, good flaw detection result and high yield.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The casting method of the high-speed steel roll is characterized by comprising the following steps of:
s1, casting an outer layer: pouring outer molten steel into the roller body casting mould box in a centrifugal casting mode, and forming an outer layer after solidification;
s2, casting the middle layer: pouring molten steel of the middle layer into a roller body casting mould box in a centrifugal casting mode, and forming the middle layer after solidification;
s3, casting of a roller core: and coaxially stacking and fixing the roll neck mold casting box, the roll body mold casting box and the bottom mold casting box from top to bottom, then pouring molten steel of the roll core in a static casting mode, then melting the intermediate layer, mixing the molten steel of the roll core with the molten steel of the roll core, and forming the roll core after solidification.
2. The method for casting a high-speed steel roll according to claim 1, further comprising, before the step S1:
s00, modeling: and respectively molding a roll body mold box, a roll neck mold box and a bottom mold box by using molding sand according to the size and the shape of the roll.
3. The method of casting a high speed steel roll according to claim 2, further comprising, before the step S1 and after the step S00:
s01, smelting: and smelting outer-layer molten steel, middle-layer molten steel and roller core molten steel in an intermediate frequency furnace, wherein the middle-layer molten steel and the roller core molten steel are smelted in the same furnace.
4. The method for casting a high-speed steel roll as claimed in claim 1, wherein the outer layer has a solidification rate of 10mm/min during centrifugal casting, the outer layer has a temperature of 1230-1250 ℃ during casting of the intermediate layer, and the intermediate layer has a temperature of 1050-1100 ℃ during casting of the roll core.
5. The method for casting the high-speed steel roll according to claim 1, wherein the thickness of the intermediate layer is 8 to 12mm in the step S2.
6. The method for casting the high-speed steel roller as claimed in claim 3, wherein in the step S01, after the intermediate layer molten steel and the roller core molten steel are smelted in the same furnace, the intermediate layer molten steel is discharged at 1440 ℃ of 1400-minus one, then 0.6-1.0 wt% of FeSi75 ferrosilicon with the particle size of 3-8mm is added for inoculation, and after stirring, the intermediate layer is cast when the temperature is reduced to 1280-minus one 1320 ℃.
7. The method for casting the high-speed steel roller as claimed in claim 6, wherein in the step S01, the molten steel of the roller core is taken out of the furnace at 1520-.
8. The method for casting the high-speed steel roll according to claim 7, wherein the alloy elements and the weight percentage contents of the intermediate layer molten steel and the roll core molten steel when the intermediate layer molten steel and the roll core molten steel are smelted in the same furnace are as follows: 2.8 to 3.2 percent of C, 1.2 to 1.5 percent of Si, 0.3 to 0.8 percent of Mn, less than or equal to 0.2 percent of Cr, less than or equal to 0.1 percent of Mo, 0.2 to 0.6 percent of Ni, less than or equal to 0.08 percent of P, and less than or equal to 0.02 percent of S.
9. The high-speed steel roll prepared by the casting method of the high-speed steel roll according to any one of claims 1 to 8, wherein the outer layer of the high-speed steel roll comprises the following alloy elements in percentage by weight: 1.5 to 2.0 percent of C, 0.4 to 1.0 percent of Si, 0.3 to 0.8 percent of Mn, 3.0 to 6.0 percent of Cr, 3.0 to 6.0 percent of Mo, 0.3 to 1.0 percent of Ni, 3.0 to 6.0 percent of V, 1.0 to 4.0 percent of W, less than or equal to 0.05 percent of P, less than or equal to 0.02 percent of S, and the balance of iron and inevitable impurities.
10. High speed steel roll according to claim 9,
the roll core comprises the following alloy components in percentage by weight: 2.8 to 3.2 percent of C, 2.2 to 2.5 percent of Si, 0.3 to 0.8 percent of Mn, less than or equal to 0.2 percent of Cr, less than or equal to 0.1 percent of Mo, 0.2 to 0.6 percent of Ni, less than or equal to 0.08 percent of P, less than or equal to 0.02 percent of S, 0.035 to 0.07 percent of Mg, 0.01 to 0.03 percent of Re, and the balance of iron and inevitable impurities.
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| CN113263155A (en) * | 2021-06-07 | 2021-08-17 | 燕山大学 | Alignment method suitable for roll casting |
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Address after: No.66, Dong'an Xingwang Road, Huangli Town, Wujin District, Changzhou City, Jiangsu Province 213100 Patentee after: Jiangsu Kaida Heavy Industry Co.,Ltd. Address before: No.66, Dong'an Xingwang Road, Huangli Town, Wujin District, Changzhou City, Jiangsu Province 213100 Patentee before: CHANGZHOU KAIDA HEAVY INDUSTRY TECHNOLOGY CO.,LTD. |
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