CN112139471B - Casting box of roller for bar wire and medium-width strip steel rolling mill and using method - Google Patents
Casting box of roller for bar wire and medium-width strip steel rolling mill and using method Download PDFInfo
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- CN112139471B CN112139471B CN202011012714.6A CN202011012714A CN112139471B CN 112139471 B CN112139471 B CN 112139471B CN 202011012714 A CN202011012714 A CN 202011012714A CN 112139471 B CN112139471 B CN 112139471B
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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
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/101—Moulds
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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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Abstract
The invention discloses a casting box of a roller for a bar wire and medium-width strip steel rolling mill and a use method thereof, wherein the casting box comprises an upper die, an upper end cover, a cold mold, a lower end cover and a lower die which are sequentially connected from top to bottom in the vertical direction; the upper die and the lower die are of a double-layer structure, the lower die comprises a vertical cylindrical inner steel die shell and a bottom box sleeved outside the inner steel die shell, and a cavity which is in accordance with the shape of the roller is formed inside the upper die, the upper end cover, the cold-type lower end cover and the inner steel die shell. The upper die comprises a cylindrical inner steel die B and an overflow box sleeved outside the inner steel die B, and a support plate B is vertically arranged between the inner steel die B and the overflow box. The invention reduces the consumption of the refractory clinker, reduces the investment of capital, manpower and time, reduces the pollution to the environment, improves the production efficiency, ensures the size of the cast blank easily, reduces the surface roughness and reduces air holes and sand holes. The dosage of the refractory clinker is reduced, and the working environment of workers is improved.
Description
Technical Field
The invention relates to the technical field of roller production and manufacturing, in particular to a casting box of a roller for a bar wire and medium-width strip steel rolling mill and a using method thereof.
Background
The common roller blank is molded by using a sand box and a roller model during casting, the molding time is long, a large amount of fire-resistant clinker is required to be used, the fire-resistant clinker is generally river sand or quartz sand, and a certain amount of clay is added in proportion and mixed to obtain the fire-resistant roller blank. The traditional casting mode not only needs to invest a large amount of funds, manpower and time, but also has the disadvantages of large environmental pollution, severe working environment, low production efficiency, large size deviation of the cast blank, large surface roughness and more air holes and sand holes.
Disclosure of Invention
The invention aims to solve the technical problem of providing a casting box of a roller for a bar and wire rod and medium and wide strip steel rolling mill and a using method thereof, which are used for solving the problems of long modeling time and low production efficiency of a roller blank during casting.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a casting box of a roller for a bar wire and medium-width strip steel rolling mill comprises an upper die, an upper end cover, a cylindrical cold mold, a lower end cover and a lower die, wherein the upper die is used for casting a roller neck at the upper end of the roller, the upper end cover is used for casting an upper shoulder of the roller, the cylindrical cold mold is used for casting a working layer of the roller, the lower end cover is used for casting a lower shoulder of the roller, and the lower die is used for casting a roller neck at the lower end of the roller; the lower die is of a double-layer structure and comprises a vertical cylindrical inner steel die shell and a bottom box sleeved outside the inner steel die shell, a gap is reserved between the inner steel die shell and the bottom box, and a cavity in accordance with the shape of the roller is formed inside the upper die, the upper end cover, the cold die, the lower end cover and the inner steel die shell.
Further, the lower mould still includes the backup pad first that is used for internal steel mould first radial positioning between vertical setting internal steel mould first and the under casing, internal steel mould first and under casing all with backup pad first fixed connection.
Furthermore, the lower die also comprises refractory bricks paved on the lower side of the inner steel die shell, and the refractory bricks are filled in the bottom box.
Furthermore, a bottom sand layer is arranged below the firebricks.
Further, it is bilayer structure to go up the mould, go up the mould and include steel mould second and the outer case that emits of cover in steel mould second in the tube-shape of vertical setting, interior steel mould second and emit gappedly between the case, interior steel mould second and emit the vertical backup pad second that is used for interior steel mould second radial positioning that is equipped with between the case, interior steel mould second and emit the case all with backup pad second fixed connection.
Furthermore, the bottom box is provided with an exhaust hole which communicates the gap with the outside atmosphere.
Further, the working layer of the roller is cast in a centrifugal casting mode through a cold mould, an upper end cover and a lower end cover.
Further, the weight of the inner steel mold is 1/2-1/3 of the weight of molten iron in the cavity after casting.
Further, the weight of the inner steel die B is 1/2-1/3 of the weight of molten iron in the cavity after casting.
The use method of the casting box of the roller for the bar wire and the medium and wide strip steel rolling mill comprises the following steps:
firstly, preparing;
heating a bottom box, brushing paint in the bottom box, sequentially paving a refractory brick and a bottom sand layer on the lower part of the bottom box, drying, then placing an inner steel form A into the bottom box, enabling the bottom of the inner steel form A to be tightly attached to the refractory brick, then heating the inner steel form A, and brushing paint on the inner wall of the inner steel form A for later use;
heating the cap box, brushing the coating inside the cap box, drying, then placing the inner steel die B into the cap box, then heating the inner steel die B, and brushing the coating on the inner wall of the inner steel die B for later use;
the upper end cover and the lower end cover are matched with a roller model for modeling and then are baked for standby;
step two, centrifugally casting a working layer of the roller;
respectively fixing an upper end cover and a lower end cover at two ends of a cold mould, brushing paint in the cold mould, the upper end cover and the lower end cover, heating, horizontally placing the cold mould, the upper end cover and the lower end cover on a horizontal centrifuge, rotating under the driving of the centrifuge, casting a liquid material into the cold mould along the axial direction in the rotating process to form a working layer, and immediately scattering protective slag on the surface of the liquid material in the cold mould after casting is finished to prevent the surface of the material from being oxidized;
thirdly, when the temperature of the working layer is 50-100 ℃ lower than the solidus line of the material, stopping the operation of the centrifuge, taking down and erecting the cold mold, the upper end cover and the lower end cover together, and cleaning the protective slag on the working layer;
fourthly, connecting the upper die with the upper end cover, connecting the lower die with the lower end cover, and casting the roller body through a casting opening of the cap box;
and fifthly, detaching the upper die, the upper end cover, the cold mold, the lower end cover and the lower die from the blank of the roller, and cleaning the blank.
The invention has the positive effects that:
1. the invention is provided with an upper die, an upper end cover, a cold mould, a lower end cover and a lower die, wherein the upper die and the lower die are of a double-layer structure, and the upper die, the lower die and the cold mould are free of fire-resistant clinker, so that the molding time is greatly shortened, the consumption of the fire-resistant clinker is reduced, the investment of capital, manpower and time is reduced, the pollution to the environment is reduced, the production efficiency is improved, the size of a cast roller blank is easily ensured, the surface roughness of the roller blank is reduced, air holes and sand holes are reduced, and the working environment of workers is improved while the consumption of the fire-resistant clinker is reduced.
2. The weight of the inner steel die A and the inner steel die B is 40% of the weight of molten iron in the cavity after casting respectively, the inner steel die A and the inner steel die B are made of steel, heat of the molten iron in the inner steel die A and the inner steel die B is conducted, the temperature of the molten iron is reduced and solidified, and therefore the inner steel die A and the inner steel die B cannot be melted, the weight of the inner steel die A and the weight of the inner steel die B are in proportion to the weight of the molten iron in the inner steel die A and the weight of the molten iron in the inner steel die B respectively, too strong chilling performance of the molten iron in the inner steel die A and the inner steel die B can be prevented, namely, the temperature drop speed of the molten iron is prevented from being too fast, and the reduction of tensile strength caused by too high hardness of a roll neck can be prevented. Because the inner steel die A and the inner steel die B are used, manual molding is not needed, the sizes of the cast roller blanks are consistent, and meanwhile, the surface roughness of the roller blanks is small, and air holes and sand holes are not easy to appear.
3. The centrifugal casting is adopted in the working layer casting method of the roller, so that the defects of air holes, sand holes and the like of the working layer are reduced, the compactness of the working layer material is improved, the product quality of the roller is improved, and the service life is prolonged.
4. The shoulders on the two sides of the working layer of the roller are respectively formed by casting in the upper end cover and the lower end cover, and the refractory clinker is arranged in the upper end cover and the lower end cover, so that the heat preservation effect is achieved, the local stress concentration caused by the too high speed of the local temperature drop of the shoulders is prevented, the toughness of the part is further prevented from being reduced, and even the phenomenon that the shoulders of the roller are broken in use is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the lower mold;
FIG. 3 is a schematic illustration of a work layer as it is spun;
FIG. 4 is a cross-sectional view A-A of FIG. 1;
FIG. 5 is a cross-sectional view B-B of FIG. 1;
in the figure, 1, refractory brick; 2. a bottom box; 3. a first support plate; 4. an inner steel form A; 5. a lower end cover; 6. cold molding; 7. a working layer; 8. a roll body; 9. an upper end cover; 10. a top box; 11. an exhaust hole; 12. an inner steel die B; 13. a support plate B; 14 bottom sand layer.
Detailed Description
The roller comprises a roller body 8 and a working layer 7 which is coated on the excircle in the middle of the roller body 8 and is made of high-hardness wear-resistant materials, and the two ends of the roller body 8 are provided with roller necks.
As shown in fig. 1 to 5, the casting box of the roll for the bar and wire and medium and wide strip steel rolling mill comprises an upper die, an upper end cover 9, a cold mold 6, a lower end cover 5 and a lower die which are vertically connected in sequence from top to bottom.
The lower die is of a double-layer structure and comprises a vertical cylindrical inner steel die shell 4, a cylindrical bottom box 2 sleeved outside the inner steel die 4 and six rectangular supporting plate shells 3 arranged between the inner steel die shell 4 and the bottom box 2. A gap is reserved between the inner steel formwork shell 4 and the bottom box 2, and the supporting plate shell 3 is vertically arranged in the gap and uniformly distributed along the circumference of the inner steel formwork shell 4. The supporting plate A3 is welded with the inner steel mould A4 and is fixedly connected with the bottom box 2 through bolts arranged on the side wall of the bottom box. The bottom case 2 is made of nodular cast iron, and the side wall of the bottom case 2 is provided with an exhaust hole 11 for communicating the gap with the outside atmosphere. The lower end cover 5 is matched with the bottom box 2 by a stop opening, and the lower end cover 5 is tightly pressed on the bottom box 2 by means of gravity.
The lower die also comprises refractory bricks 1 laid on the lower part of an inner steel die shell 4 and a bottom sand layer 14 laid on the lower side of the refractory bricks 1, wherein the inner steel die shell 4 is placed on the refractory bricks 1.
The upper die is also of a double-layer structure and comprises a cylindrical inner steel die B12, a cylindrical cap case 10 sleeved outside the inner steel die B12 and six rectangular supporting plates B13 arranged between the inner steel die B12 and the cap case 10. And a gap is reserved between the inner steel die B12 and the cap box 10, and the support plates B13 are vertically arranged in the gap and are uniformly distributed along the circumference of the inner steel die B12. And the support plate B13 is welded with the inner steel die B12 and is fixedly connected with the cap 10 through bolts arranged on the side wall of the cap. The cap box 10 is made of nodular cast iron, the cap box 10 is matched with the upper end cover 9 in a stop way, and the upper die is pressed on the upper end cover 9 by means of gravity.
The cold mould 6 is cylindrical, the upper end cover 9 and the lower end cover 5 are matched with a spigot of the cold mould 6, and the upper end cover 9 and the lower end cover 5 are detachably connected with the cold mould 6 through taper pins arranged at the corresponding spigot positions. The cap box 10, the upper end cover 9, the cold mould 6 and the lower end cover 5 are all made of nodular cast iron. And a cavity formed by refractory clinker is arranged in the upper end cover 9 and the lower end cover 5.
The center of the top of the inner steel die B12 is a casting gate, the shape of the inner steel die B12, the upper end cover 9, the cold mold 6, the lower end cover 5 and the cavity inside the inner steel die A4 is consistent with the shape of the roller, the upper end cover 9 and the lower end cover 5 are used for casting shoulders on the upper side and the lower side of the roller working layer 7, and the inner steel die B12 and the inner steel die A4 are respectively used for casting roller necks at two ends of a roller body. The refractory clinkers in the upper end cover 9 and the lower end cover 5 have a heat preservation function, and can prevent local stress concentration from being generated due to the fact that the temperature drop speed of the shoulder of the roller is too high, so that the toughness of the part is reduced, and even the shoulder of the roller is broken in use.
The cold mold 6 is not provided with the refractory clinker 13, and when the cold mold 6 is cast, the cold mold 6 is respectively and fixedly connected with the upper end cover 9 and the lower end cover 5 through the taper pins, then the cold mold is horizontally placed on a roller of a horizontal centrifuge to cast a cylindrical working layer 7 of the roller, and then the cold mold is combined with an upper die and a lower die to cast a roller body 8. The weight of the inner steel die A4 and the weight of the inner steel die B12 are respectively 40% of the weight of molten iron in the cavity after casting. The inner surfaces of the inner steel die A4 and the inner steel die B12 are coated with paint before casting, after molten iron enters the inner steel die A4 and the inner steel die B12, because the inner steel die A4 and the inner steel die B12 are made of steel, the temperature of the molten iron in the inner steel die A4 and the inner steel die B12 is reduced and solidified after the heat is conducted through the inner steel die A4 and the inner steel die B12, the inner steel die A4 and the inner steel die B12 cannot be melted, the weight ratio of the inner steel die A4 to the molten iron in the inner steel die B12 to the molten iron in the inner steel die A4 is prevented from being too strong in chilling property of the molten iron in the inner cavity of the inner steel die A4 and the inner steel die B12, namely the temperature drop speed of the molten iron is prevented from being too fast, and the tensile strength is prevented from being reduced due to the fact that the hardness of the roller body 8 at the position is too high.
According to the invention, only a small amount of fire-resistant clinker is used in the upper end cover 9 and the lower end cover 5, so that the molding time and the use amount of the fire-resistant clinker are greatly reduced, the investment of capital, manpower and time is reduced, the pollution to the environment is reduced, the production efficiency is improved, the size of the cast blank is easily ensured, the surface roughness is reduced, and air holes and sand holes are reduced. The dosage of the refractory clinker is reduced, and the working environment of workers is improved.
The use method of the casting box of the roller for the bar wire and the medium and wide strip steel rolling mill comprises the following steps:
firstly, preparing;
the bottom box 2 is baked and heated to reach 250 to 300 ℃, then is air-cooled to 220 ℃, then the inside of the bottom box 2 is painted, and then the lower part inside the bottom box 2 is paved with the refractory bricks 1 and the bottom sand layer 14 made of refractory clinker, wherein the refractory bricks 1 and the bottom sand layer 14 can be reused. Then the paint is left idle for 1 to 2 hours in a dry environment, so that the moisture in the paint is fully evaporated. Then placing the inner steel mold shell 4 welded with the support plate A3 into the bottom box 2 and fixing the inner steel mold shell 4 through bolts, then heating the inner steel mold shell 4 to enable the temperature of the inner steel mold shell to reach 220 ℃, then brushing a coating on the inner wall of the inner steel mold shell 4 and the upper surface of the refractory brick 1 in the inner steel mold shell 4, and idling in a dry environment for later use;
similarly, the box 10 is baked and heated to reach a temperature of 150 to 300 ℃, then air-cooled to 220 ℃, and then the inside of the box 10 is brushed with the coating, and then the box is left in a dry environment for 1 to 2 hours to fully evaporate the moisture in the coating. Then placing the inner steel die B12 welded with the support plate B13 into the cap box 10 and fixing the inner steel die B12 through bolts, then heating the inner steel die B12 to ensure that the temperature reaches 220 ℃, then brushing paint on the inner wall of the inner steel die B12, and idling in a dry environment for later use;
molding the upper end cover 9 and the lower end cover 5 by matching with a roller model, baking to 250-300 ℃ to fully dry the upper end cover and the lower end cover, and then idling in a dry environment for later use;
secondly, centrifugally casting a working layer 7 of the roller;
and (3) fixedly connecting two ends of the cold mold 6 with the upper end cover 9 and the lower end cover 5 through taper pins respectively as shown in figure 3, then heating the cold mold 6, the upper end cover 9 and the lower end cover 5 together to 220 ℃, brushing the coating inside the cold mold 6, the upper end cover 9 and the lower end cover 5, and drying the coating by blowing. After the coating is dried, the cold mould 6, the upper end cover 9 and the lower end cover 5 are horizontally erected on a roller of the horizontal centrifuge, so that the roller is matched with a groove correspondingly arranged on the excircle of the cold mould 6. The centrifugal machine is started, and the cold mould 6, the upper end cover 9 and the lower end cover 5 rotate together under the drive of the rollers. Molten iron used for forming a roller working layer 7 is cast into the cold mould 6 along the axial direction of the cold mould 6 in the rotating process of the cold mould 6, and the working layer 7 is made of wear-resistant high-hardness nickel-chromium-molybdenum materials. Immediately sprinkling protective slag on the surface of the molten iron in the cold mould 6 after the casting is finished, so as to prevent the surface of the molten iron from being oxidized;
and thirdly, when the temperature of the working layer 7 is 50-100 ℃ lower than the solidus line of the material, stopping the operation of the centrifugal machine, taking down the cold mold 6, and cleaning the protective slag on the working layer 7.
Fourthly, erecting the cold mold 6, respectively connecting the upper end cover 9 with the upper mold, connecting the lower end cover 5 with the lower mold, casting the roller body 8 through a casting opening at the top of the inner steel mold B12, wherein the roller body 8 is made of ball-milling cast iron. The temperature of the assembled upper die, the upper end cover 9, the cold die 6, the lower end cover 5 and the lower die is controlled to be 90-150 ℃ before casting.
And fifthly, detaching the upper die, the upper end cover 9, the cold mold 6, the lower end cover 5 and the lower die from the blank of the roller and cleaning.
Claims (7)
1. The casting box of the roller for the bar wire and medium-width strip steel rolling mill is characterized by comprising an upper die, an upper end cover (9), a cylindrical cold mold (6), a lower end cover (5) and a lower die, wherein the upper die, the upper end cover (9), the cylindrical cold mold and the lower end cover are vertically connected from top to bottom in sequence, the upper end cover is used for casting a roller neck at the upper end of the roller, the upper end cover is used for casting a shoulder at the upper side of the roller, the cylindrical cold mold is used for casting a working layer (7) of the roller, the lower end cover is used for casting a shoulder at the lower side of the roller, and the lower die is used for casting a roller neck at the lower end of the roller; the lower die is of a double-layer structure and comprises a vertical cylindrical inner steel die shell (4) and a bottom box (2) sleeved outside the inner steel die shell (4), a gap is reserved between the inner steel die shell (4) and the bottom box (2), and a cavity in accordance with the shape of a roller is formed inside the upper die, the upper end cover (9), the cold mold (6), the lower end cover (5) and the inner steel die shell (4);
the lower die further comprises a supporting plate A (3) which is vertically arranged between the inner steel die A (4) and the bottom box (2) and used for radially positioning the inner steel die A (4), and the inner steel die A (4) and the bottom box (2) are fixedly connected with the supporting plate A (3); the weight of the inner steel mold shell (4) is 40% of the weight of molten iron in the cavity after casting.
2. The casting box of a roll for a bar and wide strip mill according to claim 1, wherein the lower mold further comprises a refractory brick (1) laid on the lower side of the inner steel mold (4), and the refractory brick (1) is filled in the bottom box (2).
3. The roll casting box for rod and wire and medium and wide strip mills according to claim 2, characterized in that a bottom sand layer (14) is further provided under the refractory brick (1).
4. The casting box of the roller for the bar and wire rod and medium and wide strip steel rolling mill according to claim 1, wherein the upper die is of a double-layer structure, the upper die comprises a cylindrical inner steel die B (12) and an ejecting box (10) which is sleeved outside the inner steel die B (12), a gap is formed between the inner steel die B (12) and the ejecting box (10), a support plate B (13) which is used for radially positioning the inner steel die B (12) is vertically arranged between the inner steel die B (12) and the ejecting box (10), and the inner steel die B (12) and the ejecting box (10) are fixedly connected with the support plate B (13).
5. Casting box of rolls for rod and wide strip mills according to claim 1 characterized in that the bottom box (2) is provided with vents (11) communicating the gap with the outside atmosphere.
6. Casting box of rolls for rod and wide strip mills according to claim 1 characterized by that the working layer (7) of the rolls is cast by centrifugal casting through the cold mould (6), the upper end cap (9) and the lower end cap (5).
7. A method of using a casting box for a roll for a bar and wide strip mill, characterized in that the casting box of any one of claims 1 to 6 is used, comprising the steps of:
firstly, preparing;
heating a bottom box (2), brushing paint inside the bottom box (2), sequentially paving a refractory brick (1) and a bottom sand layer (14) on the lower part of the bottom box (2), drying, placing an inner steel mold (4) into the bottom box (2), enabling the bottom of the inner steel mold (4) to be tightly attached to the refractory brick (1), heating the inner steel mold (4), and brushing paint on the inner wall of the inner steel mold (4) for standby;
heating the cap box (10), brushing paint inside the cap box (10), then drying, then placing the inner steel die B (12) into the cap box (10), then heating the inner steel die B (12), and brushing paint on the inner wall of the inner steel die B (12) for standby;
the upper end cover (9) and the lower end cover (5) are matched with a roller model for modeling and then baked for standby;
secondly, centrifugally casting a working layer (7) of the roller;
respectively fixing an upper end cover (9) and a lower end cover (5) at two ends of a cold mold (6), brushing paint in the cold mold (6), the upper end cover (9) and the lower end cover (5) and heating, then horizontally placing the cold mold (6), the upper end cover (9) and the lower end cover (5) on a horizontal centrifuge, rotating under the drive of the centrifuge, casting a liquid material into the cold mold (6) along the axial direction in the rotating process to form a working layer (7), and immediately scattering protective slag on the surface of the liquid material in the cold mold (6) after casting is finished to prevent the surface of the material from being oxidized;
thirdly, when the temperature of the working layer (7) is 50-100 ℃ lower than the solidus line of the material, stopping the operation of the centrifuge, taking down and erecting the cold mold (6), the upper end cover (9) and the lower end cover (5) together, and cleaning the protective slag on the working layer (7);
fourthly, connecting the upper die with the upper end cover (9), connecting the lower die with the lower end cover (5), and casting the roller body (8) through a casting opening of the cap box (10);
and fifthly, detaching the upper die, the upper end cover (9), the cold die (6), the lower end cover (5) and the lower die from the blank of the roller, and cleaning the blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011012714.6A CN112139471B (en) | 2020-09-24 | 2020-09-24 | Casting box of roller for bar wire and medium-width strip steel rolling mill and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011012714.6A CN112139471B (en) | 2020-09-24 | 2020-09-24 | Casting box of roller for bar wire and medium-width strip steel rolling mill and using method |
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| CN112139471A CN112139471A (en) | 2020-12-29 |
| CN112139471B true CN112139471B (en) | 2022-04-08 |
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| CN1454723A (en) * | 2003-05-29 | 2003-11-12 | 安泰科技股份有限公司 | Composite roll ring of high-speed steel |
| CN101386026A (en) * | 2007-09-14 | 2009-03-18 | 日立金属株式会社 | Centrifugal casting roller |
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| CN104525889A (en) * | 2014-12-31 | 2015-04-22 | 中钢集团邢台机械轧辊有限公司 | High-speed steel roller manufacturing method |
| CN105458227A (en) * | 2015-12-04 | 2016-04-06 | 北京工业大学 | Centrifugal casting high-boron high-speed steel composite roller and preparing method thereof |
| CN106282820A (en) * | 2016-08-17 | 2017-01-04 | 三鑫重工机械有限公司 | A kind of high-speed steel roll manufacture method of graphitiferous |
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2020
- 2020-09-24 CN CN202011012714.6A patent/CN112139471B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659323A (en) * | 1968-07-26 | 1972-05-02 | Hitachi Ltd | A method of producing compound cast rolls |
| JPH08117965A (en) * | 1994-10-21 | 1996-05-14 | Nippon Steel Corp | Production of composite roll made by centrifugal casting |
| CN1454723A (en) * | 2003-05-29 | 2003-11-12 | 安泰科技股份有限公司 | Composite roll ring of high-speed steel |
| CN101386026A (en) * | 2007-09-14 | 2009-03-18 | 日立金属株式会社 | Centrifugal casting roller |
| JP2012213780A (en) * | 2011-03-31 | 2012-11-08 | Kubota Corp | Composite roll for rolling, and method for manufacturing the same |
| CN104220192A (en) * | 2012-04-02 | 2014-12-17 | 日立金属株式会社 | Centrifugally cast composite roller and method for manufacturing same |
| CN104525889A (en) * | 2014-12-31 | 2015-04-22 | 中钢集团邢台机械轧辊有限公司 | High-speed steel roller manufacturing method |
| CN105458227A (en) * | 2015-12-04 | 2016-04-06 | 北京工业大学 | Centrifugal casting high-boron high-speed steel composite roller and preparing method thereof |
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| CN112139471A (en) | 2020-12-29 |
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