CA1139524A - Corrosion and abrasion-resistant roll for continuous casting machines - Google Patents
Corrosion and abrasion-resistant roll for continuous casting machinesInfo
- Publication number
- CA1139524A CA1139524A CA000335185A CA335185A CA1139524A CA 1139524 A CA1139524 A CA 1139524A CA 000335185 A CA000335185 A CA 000335185A CA 335185 A CA335185 A CA 335185A CA 1139524 A CA1139524 A CA 1139524A
- Authority
- CA
- Canada
- Prior art keywords
- layer
- buffer layer
- corrosion
- roller
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Continuous Casting (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Coating By Spraying Or Casting (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
ABSTRACT
A roller for continuous casting machines is of a basical-ly drum-shaped configuration and has a cylindrical surface. The roller has a ductile, corrosion-proof buffer layer on its surface, of a thickness not exceeding about 0.1 mm, a melting point in excess of 1000°C, and an elongation at fracture exceeding 10%. An outer, corrosion- and abrasion-resistant layer covers the buffer layer and has a greater thickness than the buffer layer. The buffer layer is made of nickel or a nickel alloy, and is an electrolytically deposited layer, the outer layer being of a sintered configuration.
A roller for continuous casting machines is of a basical-ly drum-shaped configuration and has a cylindrical surface. The roller has a ductile, corrosion-proof buffer layer on its surface, of a thickness not exceeding about 0.1 mm, a melting point in excess of 1000°C, and an elongation at fracture exceeding 10%. An outer, corrosion- and abrasion-resistant layer covers the buffer layer and has a greater thickness than the buffer layer. The buffer layer is made of nickel or a nickel alloy, and is an electrolytically deposited layer, the outer layer being of a sintered configuration.
Description
lhe present invention relates to a roll or roller o~ the type used in roller -tracks for withdrawing a casting from a mold in a cantinuous casting machine.
Rollers o~ the type to which the invention pertains experience considerable wear and tear. Thus, the surface of such a roller must be as abrasion-proof as possible. Even more important is that the rolls are corrosion-proof due to their extensive exposure to water ~mder high tempera-ture operating conditions. The roller itself and particularly the material10 used for its construction may not be adequate on all of these points. There-fore, it is necessary to coat or jacket such a roller with a material that provides better protection.
Accordingly, it is known to spray on a coating which protects the roll against formation of stress cracks. The coating consists essentially of metal and/or metal oxide. In order to improve the adhesive strength of the coating, it should be sintered. However, one has employed only a pure metallic material for this purpose.
It has been observed that under a heavy coatJ the coated roller may bend and the sintered layer is prone to develop cracks in its crystal struc-ture. These cracks are sooner or later penetrated by a corrosive medium, e.g., the cooling water in the withdrawal path, and the substrate of the roller body will begin to corrode which, in turn, will tend to delaminate the protective layer, resulting in progressive localized, but expanding, destruction.
DESCRIPTION OF ~ INVENTION
_ _ ___ It is an object of the present invention to improve rolls or rollers for continuous casting machines ~y providing improved corrosion ~ .
'.
S:2~
resistance.
The invention provides a roll or roller for continuous casting machines, being of a basically drum-shaped configuration and having a cylindrical surface, said roll comprising: a du~tile, corrosion-proof bu~fer layer on said surface, having a thickness not exceeding about 0.1 mm, a melting point in excess of 1000C, and an elongation at fracture exceeding 10~; and an outer, corrosion- and abrasion-resistant layer on top of the buffer layer and having greater thickness than the buffer layer.
This arrangement can prevent delamination of the outer wear-resistant and corrosion-proof layer of the roll, even in a roll or rollers which may experience considerable bending stress.
The preferred embodiment of the invention and features and advantages thereof will be better understood from the following description taken in connection with the accompanying drawings.
DESCRIPTION OF THE DRAWINGS
... ...
The figure i5 a longitudinal section through a roller coated in accordance with the preferred embodiment of the inven-tion.
Proceeding now to the detailed description of the draw-ings, the figure illustrates a roll or roller 1, being, for example, constructed as shown in United States Letters Patent 4,086,957. Briefly, the roll has a cylindrical, tubular body or member 11 to which are affixed two end pieces 12 and 13, serving as journal members and being provided with axial inlets and outlets for the passage of cooling fluid, e.g., water; ducts distribute the cooling water to flow adjacent to the interior wall o~ tubular member 11. Further details can be taken from the above-mentioned ! 2 patent.
The outer, cylindrical surface of member 11 as well as the surface portions of members 12 and 13 cylindrically aligned with the outer surface of .
2a -, member ll, are coyered by a particular, highly ductile buffer layer 3. This layer is preferably made of nichel or a nickel alloy and has a thickness not exceeding 0.1 mm ~about 4 mils). Ihe melting point of the layer is, indeed, in excess of 1000C, and the elongation at rupture exceeds 10%. This nickel or nickel alloy layer is preferably electrolytically deposited on roll 1.
A regular, corrosion-resistant and abrasion-resistant layer 2 is placed on buffer layer 3. This layer 3 is preferably made of pure Ni (99,9 % Ni), having, for example, a thickness of 0,05 mm. Layer 2 is pre-ferably sintered onto buffer layer 3. and has a composition for example of 74,5 % Ni, 17,0 % C, 4 % Si, 4 % B and 0,5 % C.
Buffer layer 3 has a higher ductility than outer layer 2. Thus, even under heavy bending, strain cracks will not develop in layer 3; cracks may develop in layer 2, but even if moisture penetrates these cracks, buffer layer 3 is not amenable to corrosion and, thus, neither layer will delaminate.
The body, 1, remains well protected against corrosion and abrasion.
The invention is not limited to the embodiment described above, but all changes and modifications thereof not constituting departures from the spirit and scope of the invention are intended to be included.
Rollers o~ the type to which the invention pertains experience considerable wear and tear. Thus, the surface of such a roller must be as abrasion-proof as possible. Even more important is that the rolls are corrosion-proof due to their extensive exposure to water ~mder high tempera-ture operating conditions. The roller itself and particularly the material10 used for its construction may not be adequate on all of these points. There-fore, it is necessary to coat or jacket such a roller with a material that provides better protection.
Accordingly, it is known to spray on a coating which protects the roll against formation of stress cracks. The coating consists essentially of metal and/or metal oxide. In order to improve the adhesive strength of the coating, it should be sintered. However, one has employed only a pure metallic material for this purpose.
It has been observed that under a heavy coatJ the coated roller may bend and the sintered layer is prone to develop cracks in its crystal struc-ture. These cracks are sooner or later penetrated by a corrosive medium, e.g., the cooling water in the withdrawal path, and the substrate of the roller body will begin to corrode which, in turn, will tend to delaminate the protective layer, resulting in progressive localized, but expanding, destruction.
DESCRIPTION OF ~ INVENTION
_ _ ___ It is an object of the present invention to improve rolls or rollers for continuous casting machines ~y providing improved corrosion ~ .
'.
S:2~
resistance.
The invention provides a roll or roller for continuous casting machines, being of a basically drum-shaped configuration and having a cylindrical surface, said roll comprising: a du~tile, corrosion-proof bu~fer layer on said surface, having a thickness not exceeding about 0.1 mm, a melting point in excess of 1000C, and an elongation at fracture exceeding 10~; and an outer, corrosion- and abrasion-resistant layer on top of the buffer layer and having greater thickness than the buffer layer.
This arrangement can prevent delamination of the outer wear-resistant and corrosion-proof layer of the roll, even in a roll or rollers which may experience considerable bending stress.
The preferred embodiment of the invention and features and advantages thereof will be better understood from the following description taken in connection with the accompanying drawings.
DESCRIPTION OF THE DRAWINGS
... ...
The figure i5 a longitudinal section through a roller coated in accordance with the preferred embodiment of the inven-tion.
Proceeding now to the detailed description of the draw-ings, the figure illustrates a roll or roller 1, being, for example, constructed as shown in United States Letters Patent 4,086,957. Briefly, the roll has a cylindrical, tubular body or member 11 to which are affixed two end pieces 12 and 13, serving as journal members and being provided with axial inlets and outlets for the passage of cooling fluid, e.g., water; ducts distribute the cooling water to flow adjacent to the interior wall o~ tubular member 11. Further details can be taken from the above-mentioned ! 2 patent.
The outer, cylindrical surface of member 11 as well as the surface portions of members 12 and 13 cylindrically aligned with the outer surface of .
2a -, member ll, are coyered by a particular, highly ductile buffer layer 3. This layer is preferably made of nichel or a nickel alloy and has a thickness not exceeding 0.1 mm ~about 4 mils). Ihe melting point of the layer is, indeed, in excess of 1000C, and the elongation at rupture exceeds 10%. This nickel or nickel alloy layer is preferably electrolytically deposited on roll 1.
A regular, corrosion-resistant and abrasion-resistant layer 2 is placed on buffer layer 3. This layer 3 is preferably made of pure Ni (99,9 % Ni), having, for example, a thickness of 0,05 mm. Layer 2 is pre-ferably sintered onto buffer layer 3. and has a composition for example of 74,5 % Ni, 17,0 % C, 4 % Si, 4 % B and 0,5 % C.
Buffer layer 3 has a higher ductility than outer layer 2. Thus, even under heavy bending, strain cracks will not develop in layer 3; cracks may develop in layer 2, but even if moisture penetrates these cracks, buffer layer 3 is not amenable to corrosion and, thus, neither layer will delaminate.
The body, 1, remains well protected against corrosion and abrasion.
The invention is not limited to the embodiment described above, but all changes and modifications thereof not constituting departures from the spirit and scope of the invention are intended to be included.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Roll or roller for continuous casting machines, being of a basically drum-shaped configuration and having a cylindrical sur-face, said roll comprising: a ductile, corrosion-proof buffer layer on said surface, having a thickness not exceeding about 0.1 mm, a melting point in excess of 1000°C, and an elongation at fracture exceeding 10%; and an outer, corrosion- and abrasion resistant layer on top of the buffer layer and having greater thickness than the buffer layer.
2. Roll or roller as in Claim 1, said buffer layer being made of nickel or a nickel alloy.
3. Roll or roller as in Claim 1 or 2, the buffer layer being an electrolytically deposited layer, the outer layer being of a sintered configuration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2840902.1-24 | 1978-09-18 | ||
| DE2840902A DE2840902C2 (en) | 1978-09-18 | 1978-09-18 | Continuous casting roll with corrosion-resistant, wear-resistant sintered protective layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1139524A true CA1139524A (en) | 1983-01-18 |
Family
ID=6049945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000335185A Expired CA1139524A (en) | 1978-09-18 | 1979-09-07 | Corrosion and abrasion-resistant roll for continuous casting machines |
Country Status (10)
| Country | Link |
|---|---|
| JP (2) | JPS5542194A (en) |
| AU (1) | AU528156B2 (en) |
| BE (1) | BE878827A (en) |
| CA (1) | CA1139524A (en) |
| DE (1) | DE2840902C2 (en) |
| FR (1) | FR2435983A1 (en) |
| GB (1) | GB2032577B (en) |
| IT (1) | IT1162754B (en) |
| LU (1) | LU81481A1 (en) |
| NL (1) | NL7904930A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4027225C2 (en) * | 1990-08-24 | 1993-12-16 | Mannesmann Ag | Process for the production of a supporting and guiding roller of a continuous caster |
| AT502694B1 (en) | 2005-10-20 | 2007-10-15 | Voest Alpine Industrienanlagen | STRAND LEADERSHIP |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1132849A (en) * | 1965-06-22 | 1968-11-06 | Telcon Metals Ltd | Improvements in and relating to hot rolling |
| FR2191948A1 (en) * | 1972-07-07 | 1974-02-08 | Marichal Ketin Et Cie | Rolling mill roll cylinder - for eg wire is composed of a fatigue resistant core and a hard wear resistant facing |
| JPS52813B2 (en) * | 1973-05-11 | 1977-01-11 | ||
| US4037646A (en) * | 1975-06-13 | 1977-07-26 | Sumitomo Metal Industries, Ltd. | Molds for continuously casting steel |
| JPS5240608A (en) * | 1975-09-26 | 1977-03-29 | Itsukou Watanabe | Paper screening apparatus |
| CA1079016A (en) * | 1976-03-25 | 1980-06-10 | Donald S. Greif | Water insensitive starch fibers and a process for the production thereof |
| JPS5312447A (en) * | 1976-07-22 | 1978-02-03 | Nisshin Oil Mills Ltd | Production of dry tofu |
| DE2636199A1 (en) * | 1976-08-09 | 1978-02-16 | Mannesmann Ag | PROCESS FOR THE MANUFACTURING OF TREATED ROLLS FOR CONTINUOUS CASTING PLANTS |
| JPS5849178B2 (en) * | 1976-08-23 | 1983-11-02 | 日本セキソ−工業株式会社 | honeycomb sand germanchi panel |
| FR2367557A1 (en) * | 1976-10-15 | 1978-05-12 | Usinor | GUIDANCE ROLLERS IMPROVEMENTS, ESPECIALLY FOR CONTINUOUS CASTING INSTALLATION |
-
1978
- 1978-09-18 DE DE2840902A patent/DE2840902C2/en not_active Expired
-
1979
- 1979-06-25 NL NL7904930A patent/NL7904930A/en not_active Application Discontinuation
- 1979-07-10 LU LU81481A patent/LU81481A1/en unknown
- 1979-07-11 IT IT24286/79A patent/IT1162754B/en active
- 1979-07-23 FR FR7919382A patent/FR2435983A1/en active Granted
- 1979-07-25 AU AU49216/79A patent/AU528156B2/en not_active Ceased
- 1979-08-29 JP JP11017579A patent/JPS5542194A/en active Pending
- 1979-09-07 CA CA000335185A patent/CA1139524A/en not_active Expired
- 1979-09-14 GB GB7931930A patent/GB2032577B/en not_active Expired
- 1979-09-17 BE BE0/197179A patent/BE878827A/en not_active IP Right Cessation
-
1982
- 1982-06-14 JP JP1982088629U patent/JPS584262U/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2435983B1 (en) | 1983-03-11 |
| DE2840902A1 (en) | 1980-03-27 |
| IT7924286A0 (en) | 1979-07-11 |
| GB2032577B (en) | 1983-05-18 |
| AU4921679A (en) | 1980-03-27 |
| NL7904930A (en) | 1980-03-20 |
| DE2840902C2 (en) | 1982-09-16 |
| JPS584262U (en) | 1983-01-12 |
| GB2032577A (en) | 1980-05-08 |
| LU81481A1 (en) | 1979-10-31 |
| JPS5542194A (en) | 1980-03-25 |
| FR2435983A1 (en) | 1980-04-11 |
| BE878827A (en) | 1980-01-16 |
| IT1162754B (en) | 1987-04-01 |
| AU528156B2 (en) | 1983-04-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |