CN220760555U - Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel - Google Patents
Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel Download PDFInfo
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- CN220760555U CN220760555U CN202322151627.4U CN202322151627U CN220760555U CN 220760555 U CN220760555 U CN 220760555U CN 202322151627 U CN202322151627 U CN 202322151627U CN 220760555 U CN220760555 U CN 220760555U
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- angle steel
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- 238000005096 rolling process Methods 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 18
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 4
- 210000003739 neck Anatomy 0.000 claims 3
- 238000000034 method Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 4
- 229910001563 bainite Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 semisteel Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The utility model relates to the technical field of rollers, in particular to a novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved rolling of angle steel, which comprises a blooming mill group, a middle rolling mill group and a finishing mill group which are sequentially arranged; the blooming mill set comprises a first roll set, a second roll set and a third roll set; the middle rolling mill group comprises a fourth roll group, a fifth roll group and a sixth roll group; the finishing mill group includes a seventh roll group. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved rolling angle steel can better solve the technical problems and meet the use requirements of various rolling mills.
Description
Technical Field
The utility model relates to the technical field of rollers, in particular to a novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly-type grooved rolling of angle steel.
Background
In a steel rolling system, section steel is used as a rolling variety, specification and shape section, is complex and various, and is the largest category of the steel rolling system. During the production of the section steel, according to the arrangement form of the rolling mill, a large series of rolling methods such as a shuttle rolling method, a tracking rolling method, a looper rolling method and a continuous rolling method exist; the method is classified into Kong Xingga method and universal rolling method according to the pass. Kong Xingga is also divided into butterfly hole type, offset hole type, bowing type, etc. And (3) rolling the profile steel, wherein the profile steel is mostly deep holes.
The section steel rolling method is to roll a blank with a certain section shape by sequentially passing through rollers with complex-shape holes on each frame according to the section shape of a finished product. The rolled piece generates complex changes in the pass, and extends longitudinally while reducing the cross section, and finally rolls the blank into the required size and shape. The method is influenced by complex factors such as asymmetry of the pass, non-uniformity of rolling reduction distribution, forced constraint of roll pass side face on expansion, bending deformation of rolled pieces in rolling and the like, so that the theory of pass rolling characteristics is still imperfect. The pass is usually formed by combining grooves on a roller, namely a roll gap, a round angle, a side wall inclination, a locking (closed pass) roll collar and the like. The hole patterns are divided into five types according to the purposes: 1) Performing blooming and cogging; 2) Extending and roughing the pass; 3) A forming pass or intermediate pass; 4) A product front hole type or finish rolling front hole type; 5) The finished pass or finish pass. For example: rolling 5 of billets of the same specification # The angle steel is rolled by a butterfly hole, 60 x 30 x 2000mm can be rolled by 7 passes, and 9 passes are needed by other flat holes.
Rolls are important tools for rolling steel. How to realize the cost reduction and efficiency enhancement, the production requirement of green and environment protection is met, and the selection of the material of the roller is necessary. With the continuous updating of rolling mills, the rapid development of rolling technology also puts higher demands on the rollers used by the rolling mill. Alloy steel, semisteel, pearlite ductile cast iron rollers used in the prior section mill roughing mill set, middle mill set and the like, high-quality carbon structural steel, cold heading steel, spring steel, bearing steel, alloy structural steel, stainless steel and other steel types are often selected improperly due to roller materials, so that the steel rolling yield and the surface quality of rolled pieces cannot meet the high requirements of the market, meanwhile, the rollers are contacted with high-temperature rolled pieces for a long time during rolling operation, and the connection parts of the side walls and the groove bottoms of pass holes of the rollers can cause tendentiousness abrasion indentation at the contour parts of the rolled pieces, and pass surface cracks, peeling off blocks and the like are caused seriously.
Disclosure of Invention
The utility model aims to solve the technical problems that: in order to solve the problems in the prior art, the novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel is provided, the technical problems can be well solved, and the use requirements of various rolling mills are met.
The technical scheme adopted for solving the technical problems is as follows: the novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved rolling of angle steel comprises a blooming mill group, a middle rolling mill group and a finishing mill group which are sequentially arranged; the blooming mill set comprises a first roll set, a second roll set and a third roll set; the middle rolling mill group comprises a fourth roll group, a fifth roll group and a sixth roll group; the finishing mill group includes a seventh roll group.
Further, in the above technical solution, the roll groups in the blooming mill group, the intermediate mill group and the finishing mill group all include a working section, a roll neck and a driving end; the roll neck is arranged at two ends of the working section, and the transmission end is arranged at one side of the roll neck.
Further, in the above technical scheme, the roller groups in the blooming mill group, the intermediate mill group and the finishing mill group all comprise an upper roller and a lower roller which are arranged in parallel up and down, and the middle part of the upper working section of the upper roller and the middle part of the middle working section of the lower roller form a rolling pass.
Further, in the above technical solution, the rolling hole of the first roll set is formed into a lower columnar structure with an upper peak structure.
Further, in the above technical solution, the rolling hole pattern of the second roll set is in a bulge structure at two ends of the lower part of the upper peak structure.
Further, in the above technical solution, the rolling hole pattern of the third roll set is in a structure with an upper peak structure and a lower middle part of the rolling hole pattern of the third roll set protruding upwards.
Further, in the above technical scheme, the rolling pass in the intermediate rolling mill set is of an angle steel-like section structure.
Further, in the above technical solution, the rolling hole pattern of the seventh roll set is also in an angle steel section structure.
The beneficial effects of the utility model are as follows: the novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved rolling angle steel can better solve the technical problems and meet the use requirements of various rolling mills.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the distribution of the rolling passes of FIG. 1;
FIG. 3 is a schematic view of the distribution of the roughing train of FIG. 1;
FIG. 4 is a schematic view of the rolling mill train of FIG. 1;
FIG. 5 is a schematic diagram showing the distribution of the finishing train in FIG. 1.
The reference numerals in the drawings are: 1. the first roll group, 2, the second roll group, 3, the third roll group, 4, the fourth roll group, 5, the fifth roll group, 6, the sixth roll group, 7, the seventh roll group, 8, the working section, 9, the roll neck, 10, the driving end, 11, the upper roll, 12 and the lower roll; A. and (3) billet steel.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
1-5, a novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved rolling of angle steel comprises a blooming mill group, a middle rolling mill group and a finishing mill group which are sequentially arranged; the blooming mill set comprises a first roll set 1, a second roll set 2 and a third roll set 3; the middle rolling mill group comprises a fourth roll group 4, a fifth roll group 5 and a sixth roll group 6; the finishing mill group includes a seventh roll group 7.
Wherein, the roller groups in the blooming mill group, the intermediate mill group and the finishing mill group all comprise a working section 8, a roller neck 9 and a transmission end 10; the roll neck 9 is arranged at two ends of the working section 8, and the transmission end 10 is arranged at one side of the roll neck 9. The roller groups in the blooming mill group, the intermediate rolling mill group and the finishing mill group comprise an upper roller 11 and a lower roller 12 which are arranged in parallel up and down, and the middle part of the upper working section of the upper roller 11 and the middle part of the middle working section of the lower roller 12 form a rolling pass. The rolling passes of the first roll stack 1 are in the form of upper peaks and lower columns. The rolling pass of the second roll set 2 is in a bulge structure at the two ends of the lower part of the upper peak-shaped structure. The rolling hole pattern of the third roller group 3 is in an upper peak structure, and the middle part of the lower part of the rolling hole pattern is in an upward bulge structure. The rolling pass in the middle rolling mill group is similar to the angle steel section structure. The rolling pass of the seventh roller group 7 is in an angle steel section structure.
The production process of the roll groups of the blooming mill group, the intermediate mill group and the finishing mill group in the application is as follows: 1. the hardness of the roller is determined according to the hole type operation environment of the rough, medium and finish rolling frames, so that the wear resistance, the better strength and toughness and the hot cracking property of the roller are ensured. In order to achieve the aim, 0.010 to 0.30 percent of niobium is added into the chemical components of the roller group of the roughing mill, 0.020 to 0.40 percent of BaGa inoculant is added into the inoculated product after the roller is subjected to spheroidization treatment, so that the spheroidization quality and grade are improved; the chemical components of the roller group of the intermediate rolling unit are added with 0.10 to 0.30 percent of vanadium element, and the roller group of the finishing rolling unit is added with 0.15 to 0.25 percent of niobium and 0.20 to 0.30 percent of vanadium. 2. Roller heat treatment: normalizing the roller group in the roughing mill at a high temperature of 860-920 ℃, preserving heat for 2-3 hours, discharging from the furnace, air-cooling, and tempering for 8 hours at 550 ℃; obtaining granular carbide, pearlite and bainite; the surface hardness of the roller is 60-65HSD; the tensile strength is more than or equal to 580MPa; the normalizing temperature of the rollers of the middle rolling mill set is 850-920 ℃, the rollers are kept for 2-4 hours, the rollers are discharged from the furnace for air cooling, the rollers are fed into the furnace for tempering for 4-6 hours after the temperature reaches 550 ℃, and the granular carbide, tempered sorbite and bainite are obtained, wherein the hardness of the roller surface is 63-68HSD; the tensile strength is more than or equal to 550MPa; the normalizing temperature of the rollers in the finishing mill group is 860-880 ℃, the temperature is kept for 2 hours, the rollers are discharged and spray quenched, the roller temperature is 550 ℃, the rollers enter the furnace and are tempered for 1-3 hours, and the matrix structure of the rollers is granular carbide, bainite and a small amount of martensite; the hardness of the roller surface of the roller is 70-75HSD, and the tensile strength is more than or equal to 450MPa.
The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (8)
1. Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel is characterized in that: comprises a blooming mill group, a middle rolling mill group and a finishing mill group which are sequentially arranged; the blooming mill set comprises a first roll set, a second roll set and a third roll set; the middle rolling mill group comprises a fourth roll group, a fifth roll group and a sixth roll group; the finishing mill group includes a seventh roll group.
2. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 1, which is characterized in that: the roller groups in the blooming mill group, the intermediate mill group and the finishing mill group all comprise working sections, roller necks and driving ends; the roll neck is arranged at two ends of the working section, and the transmission end is arranged at one side of the roll neck.
3. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 2, which is characterized in that: the roller groups in the blooming mill group, the middle rolling mill group and the finishing mill group comprise an upper roller and a lower roller which are arranged in parallel up and down, and the middle part of the upper working section of the upper roller and the middle part of the middle working section of the lower roller form a rolling pass.
4. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 3, wherein: the rolling hole of the first roller group is formed into a lower columnar structure with an upper peak-shaped structure.
5. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 3, wherein: the rolling pass of the second roller group is in a bulge structure at two ends of the lower part of the upper peak-shaped structure.
6. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 3, wherein: the rolling hole pattern of the third roller group is in an upper peak structure, and the middle part of the lower part of the rolling hole pattern is in an upward bulge structure.
7. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 3, wherein: the rolling pass in the middle rolling mill set is of an angle steel-like cross-section structure.
8. The novel nickel-chromium-molybdenum ductile iron combined roller special for butterfly grooved angle steel according to claim 3, wherein: the rolling pass of the seventh roller group is of an angle steel section structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322151627.4U CN220760555U (en) | 2023-08-10 | 2023-08-10 | Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322151627.4U CN220760555U (en) | 2023-08-10 | 2023-08-10 | Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220760555U true CN220760555U (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322151627.4U Active CN220760555U (en) | 2023-08-10 | 2023-08-10 | Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220760555U (en) |
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2023
- 2023-08-10 CN CN202322151627.4U patent/CN220760555U/en active Active
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