CN212703684U - Chromium alloy shaped steel finished product roll - Google Patents
Chromium alloy shaped steel finished product roll Download PDFInfo
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- CN212703684U CN212703684U CN202021170838.2U CN202021170838U CN212703684U CN 212703684 U CN212703684 U CN 212703684U CN 202021170838 U CN202021170838 U CN 202021170838U CN 212703684 U CN212703684 U CN 212703684U
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Abstract
The utility model discloses a chromium alloy shaped steel finished product roll, have two rolls that the longitudinal symmetry formula distributes, the roll has the roll body of being made by chromium alloy shaped steel, and the left and right both ends of roll body are provided with a bearing installation department of being made by chromium alloy shaped steel respectively, and the roll body is equipped with the radius angle with the junction of bearing installation department, and wherein the outside of the bearing installation department of one side on the left side is provided with the connecting portion of being made by chromium alloy shaped steel, and the outside of the bearing installation department of one side on the right side is provided with the transmission portion of being made by chromium alloy shaped steel in addition; evenly be provided with a plurality of arc annular along the length direction of roll body, the arc annular is cut open along upper and lower direction and is obtained the upper groove of undercut and the lower groove of upper groove, and the lower groove that is arranged in the top roll and the upper groove that is arranged in the roll of below are assembled and are formed a whole circle. The chromium alloy section steel finished roll has the characteristics of high performance, greenness, environmental protection and conservation.
Description
Technical Field
The utility model belongs to the technical field of the technique of roll and specifically relates to a chromium alloy shaped steel finished product roll.
Background
In the rolling production process of the section steel, the specification, shape, size, precision and surface smoothness of a finished section steel product are always the key points of the control of the production process of the section steel, particularly the section steel with a complex section, the requirements are met, and the affected factors are many, such as rolling force, the material quality, rigidity, process design, rolling environment and the like of the section steel, and are in indispensable close connection with the comprehensive performance of a main rolling tool roller. At present, traditional rollers for rolling various types of section steel at home and abroad are made of more materials, but limited by rolling environment, the number of fine rollers which completely meet rolling requirements is small, and as steel products are produced in China to be strong, reduced green process equipment needs to be developed, industrial policies of reducing resource and energy consumption and reducing environmental pollution and carbon emission need to be created, and technological innovation needs to be provided, and high-performance, green, environment-friendly and saving new products need to be developed. Therefore, as a roller manufacturing enterprise for achieving the above object, it is necessary to develop an innovative way to improve efficiency, search market for science and technology, and continuously research and develop new products meeting the requirement of time difference so as to meet new requirements of section steel rolling enterprises.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: in order to overcome the defects in the prior art, the chromium alloy section steel finished product roller has the characteristics of high performance, greenness, environmental protection and conservation.
The utility model provides a technical scheme that its technical problem adopted is: a chromium alloy section steel finished product roller is provided with two rollers which are distributed in an up-and-down symmetrical mode, the roller is provided with a roller body made of chromium alloy section steel, the left end and the right end of the roller body are respectively provided with a bearing installation part made of chromium alloy section steel, a fillet is arranged at the joint of the roller body and the bearing installation part, the outer side of the bearing installation part on the left side is provided with a connecting part made of chromium alloy section steel, and the outer side of the bearing installation part on the right side is provided with a transmission part made of chromium alloy section steel; evenly be provided with a plurality of arc annular along the length direction of roll body, the arc annular is cut open along upper and lower direction and is obtained the upper groove of undercut and the lower groove of upper groove, and the lower groove that is arranged in the top roll and the upper groove that is arranged in the roll of below are assembled and are formed a whole circle.
More specifically, in the above technical solution, the axis of the roll body, the axis of the arc-shaped ring groove, the axis of the bearing mounting portion, the axis of the connecting portion, and the axis of the transmission portion are located on the same straight line.
More specifically, in the above technical solution, the width of the arc-shaped ring groove occupies 0.07-0.09 of the length of the roller body.
More specifically, in the above technical solution, the roller body, the bearing mounting portion, the connecting portion, and the transmission portion are an integrated structure.
More specifically, in the above technical solution, the transmission part is a flat square transmission part.
The utility model has the advantages that: the utility model provides a pair of chromium alloy shaped steel finished product roll and manufacturing method thereof, structural design is very reasonable for the roll possesses high performance, greenization, environmental protection saving type's characteristics, satisfies steel rolling enterprise's user demand.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures are: 1. a roll body; 2. rounding off; 3. a bearing mounting portion; 4. a connecting portion; 5. a transmission section; 6. an arc-shaped ring groove; 6-1, arranging a groove; 6-2, lower groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "one side", "the other side", "both sides", "between", "middle part", "upper end", "lower end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
See fig. 1, the utility model discloses a chromium alloy shaped steel finished product roll, have two rolls of longitudinal symmetry formula distribution, the roll has the roll body 1 made by chromium alloy shaped steel, the left and right both ends of roll body 1 are provided with a bearing installation department 3 made by chromium alloy shaped steel respectively, the roll body 1 is equipped with radius angle 2 with the junction of bearing installation department 3, wherein the outside of the bearing installation department 3 of one side on the left side is provided with connecting portion 4 made by chromium alloy shaped steel, in addition the outside of the bearing installation department 3 of one side on the right side is provided with the transmission portion 5 made by chromium alloy shaped steel; a plurality of arc-shaped ring grooves 6 are uniformly arranged along the length direction of the roller body 1, the arc-shaped ring grooves 6 are cut along the up-down direction to obtain an upper groove 6-1 of a downward concave and a lower groove 6-2 of an upper groove, and the lower groove 6-2 in the upper roller and the upper groove 6-1 in the lower roller are spliced to form a whole circle.
Wherein, the axis of the roller body 1, the axis of the arc-shaped ring groove 6, the axis of the bearing installation part 3, the axis of the connecting part 4 and the axis of the transmission part 5 are positioned on the same straight line. The width of the arc-shaped ring groove 6 occupies 0.07-0.09 of the length of the roller body 1. The roller body 1, the bearing installation part 3, the connection part 4 and the transmission part 5 are of an integrated structure, namely, the roller body 1, the bearing installation part 3, the connection part 4 and the transmission part 5 are all made of the same material, and the roller body 1, the bearing installation part 3, the connection part 4 and the transmission part 5 are of an integrated structure. The roller body 1, the bearing mounting part 3 and the connecting part 4 are all of a cylindrical structure. The transmission part 5 adopts a flat square transmission part.
The application of the patent aims at the characteristics of diversified, standardized, serialized, large-scale, high-rigidity and high-precision development of section steel products, and combines the national industrial policies, an improved chromium alloy section steel finished product roller is developed, the product has good wear resistance, strong impact toughness and strong hot cracking resistance, the rolling quantity of the roller on-machine operation is basically equivalent in the early and late stages, the rolling total quantity is improved by more than 5 times compared with that of the traditional roller, the improved chromium alloy section steel finished product roller is well received by rolling enterprises, and better economic benefit and social benefit are obtained.
The production method of the chromium alloy section steel finished roll comprises the following steps:
firstly, chemical components are reasonably prepared, and the roller is prepared from the following raw materials in parts by weight: 0.45-0.75% of carbon, 0.45-0.80% of silicon, 0.45-0.80% of manganese, less than or equal to 0.020% of phosphorus, less than or equal to 0.020% of sulfur, 5.50-6.50% of chromium, 0.50-1.00% of nickel, 0.50-0.80% of vanadium and 0.15-0.30% of niobium.
Secondly, smelting and pouring are carried out: 1. smelting pure molten steel, adding alloy when the temperature of the steel is 1450-1500 ℃, slagging after 20 minutes, mixing a slagging agent by lime, firefly, carbon powder, silicon powder and calcium carbide, mixing the materials by an electromagnetic mixer, adding 3-5 kg/ton of yttrium-based heavy rare earth molten steel modifier when the temperature of the steel is 1580-1620 ℃, removing impurity elements by using active elements in the rare earth to obtain pure molten steel, and inserting 0.03-0.05% of aluminum cakes into the furnace for deoxidation 5 minutes before tapping. Soft blowing argon in a steel ladle during tapping to enable micro slag to float upwards and remove hydrogen, stopping blowing after a plurality of minutes, calming molten steel for 5-15 minutes, and pouring when the temperature of the steel reaches 50-80 ℃; 2. pouring: the top pouring process is adopted, when the lower roll neck in the casting cavity is poured to meet the sequential solidification requirement, small flow is poured, when the roll neck is filled with molten steel to the roll body, large flow is poured, when the molten steel is poured to the effective height of the upper roll neck, the height of a molten steel ladle is increased, the downward flow impact force of the molten steel is increased, the flow is one third, sequential feeding is carried out, meanwhile, an electromagnetic vibrator is started, the density of the molten steel cooling solidification crystals is improved by utilizing vibration waves, the microstructure is refined, and a loose area formed when the roll is cooled and solidified is eliminated.
Thirdly, special heat treatment: 1. in the diffusion annealing stage, charging the roller at normal temperature, heating at the speed of 10-15 ℃/h, preserving heat for 6-8 hours when the temperature is raised to 660-680 ℃ in the phase change stage, then heating at the speed of 15-20 ℃/h, preserving heat according to the diameter of the roller of 25 mm/hour when the temperature of the roller is raised to 1050-1100 ℃, and then pulling out the roller to be cooled on a trolley; 2. in the spheroidization heating stage, the roller is cooled to 450-550 ℃ on a trolley and then enters a furnace for spheroidization, so that carbide in the structure is converted into fine particles from a sheet shape, corresponding structure preparation is prepared for subsequent roller quenching treatment, the heating speed is 20-30 ℃/h, the temperature is raised to a value slightly higher than the critical point of AC1, the temperature is kept for 15-30 h, and then the furnace is cooled; 3. in the normalizing temperature rise stage, when the roller temperature furnace is cooled to 500 ℃, the roller temperature furnace enters the furnace, the temperature is raised at the speed of 10-30 ℃ (the front section is 10-20 ℃, the rear section is 20-30 ℃), when the temperature is 1000-1050 ℃, the roller is kept at the temperature of 25 mm/h, and then the roller is hung on a rotary spray quenching machine for water mist spray quenching; 4. tempering: tempering when the roller temperature is 250-300 ℃, heating at the speed of 10-20 ℃/h, keeping the temperature when the temperature is 480-520 ℃, keeping the temperature at 25 mm/h, and then furnace cooling.
Fourthly, comprehensive performance of the roller: 1. the roll body hardness of the roll is 65-73 HSD, and the working layer hardness fall is less than or equal to 1.5 HSD; 2. the tensile strength of the roller is more than or equal to 600 Mpa; 3. the roller has a metallographic matrix structure, and metal type fine granular carbide, tempered sorbite, bainite and a small amount of martensite.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. A chromium alloy shaped steel finished product roll is characterized in that: the roller is provided with two rollers which are distributed in an up-and-down symmetrical mode, the roller is provided with a roller body (1) made of chromium alloy steel, the left end and the right end of the roller body (1) are respectively provided with a bearing installation part (3) made of chromium alloy steel, a fillet (2) is arranged at the joint of the roller body (1) and the bearing installation part (3), the outer side of the bearing installation part (3) on the left side is provided with a connecting part (4) made of chromium alloy steel, and the outer side of the bearing installation part (3) on the right side is provided with a transmission part (5) made of chromium alloy steel; a plurality of arc-shaped ring grooves (6) are uniformly arranged in the length direction of the roller body (1), the arc-shaped ring grooves (6) are cut along the up-down direction to obtain an upper groove (6-1) which is sunken downwards and a lower groove (6-2) which is the upper groove, the lower groove (6-2) which is positioned in the upper roller and the upper groove (6-1) which is positioned in the lower roller are assembled to form a whole circle.
2. A chromium alloy section steel finished roll according to claim 1, characterized in that: the axis of the roller body (1), the axis of the arc-shaped ring groove (6), the axis of the bearing installation part (3), the axis of the connecting part (4) and the axis of the transmission part (5) are positioned on the same straight line.
3. A chromium alloy section steel finished roll according to claim 1, characterized in that: the width dimension of the arc-shaped ring groove (6) occupies 0.07-0.09 of the length dimension of the roller body (1).
4. A chromium alloy section steel finished roll according to claim 1, characterized in that: the roller body (1), the bearing installation part (3), the connecting part (4) and the transmission part (5) are of an integrated structure.
5. A chromium alloy section steel finished roll according to claim 1, characterized in that: the transmission part (5) adopts a flat square transmission part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170838.2U CN212703684U (en) | 2020-06-21 | 2020-06-21 | Chromium alloy shaped steel finished product roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170838.2U CN212703684U (en) | 2020-06-21 | 2020-06-21 | Chromium alloy shaped steel finished product roll |
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| CN212703684U true CN212703684U (en) | 2021-03-16 |
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| CN202021170838.2U Active CN212703684U (en) | 2020-06-21 | 2020-06-21 | Chromium alloy shaped steel finished product roll |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790756A (en) * | 2020-06-21 | 2020-10-20 | 常州市瑞宏轧辊有限公司 | Chromium alloy section steel finished product roller and manufacturing method thereof |
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- 2020-06-21 CN CN202021170838.2U patent/CN212703684U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790756A (en) * | 2020-06-21 | 2020-10-20 | 常州市瑞宏轧辊有限公司 | Chromium alloy section steel finished product roller and manufacturing method thereof |
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