CN218532320U - Die steel finishing roll for improved F-shaped steel frame - Google Patents
Die steel finishing roll for improved F-shaped steel frame Download PDFInfo
- Publication number
- CN218532320U CN218532320U CN202222696267.1U CN202222696267U CN218532320U CN 218532320 U CN218532320 U CN 218532320U CN 202222696267 U CN202222696267 U CN 202222696267U CN 218532320 U CN218532320 U CN 218532320U
- Authority
- CN
- China
- Prior art keywords
- roller
- roll
- shaped steel
- rolling
- web
- 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.)
- Active
Links
Images
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The utility model discloses a mould steel finishing roll that improved generation F shaped steel frame used, including last roller and rather than the complex lower roll, go up the left rolling die cavity that forms rolling left F shaped steel between roller, the lower roll and roll right rolling die cavity of rolling right F shaped steel, be provided with the connection rolling die cavity that feeds through the two formation processing portion between rolling die cavity in a left side, the right rolling die cavity, left side F shaped steel, right F shaped steel notch opposite orientation, left side rolling die cavity includes the left web groove of lower roll surface department, it forms left web to the splenium to go up roller roll surface department, left side web corresponds splenium and left web groove to roll the web. The utility model discloses a mould steel finish roll not only hardness is high, and the wearability is good, and the roll surface does not have the hardness drop to pass tank bottom basically, possesses very strong toughness and thermal fatigue crack resistance ability, can also produce better red hard during rolling operation, provides strong guarantee for rolled piece surface quality.
Description
Technical Field
The utility model belongs to the technical field of the mould steel roll, concretely relates to mould steel finishing roll that improved generation F shaped steel frame used.
Background
In recent years, with the continuous emergence of domestic extra large cities, the transportation demands of high operation capacity in cities and suburbs are increasingly accelerated, and the development and construction of magnetic levitation trains are promised besides intercity trains and subways of rail transit. F-shaped steel serving as a material for an operation track of a maglev train is widely rolled and produced on universal rolling mills and continuous rolling mills of several key steel mills. Because the F-shaped steel needs to have high rigidity, strong toughness and bright surface quality, if the F-shaped steel is rolled on a universal rolling mill, only a single F-shaped steel pass can be provided, the rolling yield is low, the stability is poor, the yield is low, the hourly rolling quantity is only about 70t, and a large amount of demands of the market cannot be met. At present, horizontal rolls, vertical rolls and edging rolls used by most universal rolling mills all use AD160 and AD180 semisteel, but the hardness of the roll surface of the material is limited to 50-65HSD. And the drop from the hardness of the roll surface to the hardness of the groove bottom of the groove is 3-5HSD, under the circulating action of heat conduction of a high-temperature rolled piece and cooling water, oxidative heat cracks can appear on the side surface of the groove and the groove bottom of the groove when the roll is in rolling operation, and the roll is extended and extended continuously, so that the rolling yield and the surface quality of the rolled piece are seriously influenced, and in order to improve the production efficiency of F-shaped steel and the surface quality of the rolled piece, the domestic innovation of the utility model discloses a reversible cogging mill UR/E/UP universal mill again, then the birth of the double-rolling F-shaped steel groove rolling method on a finished product unit, the roll made of the material brings certain influence to the novel forward and backward rolling method.
Aiming at the characteristics of F-shaped steel produced by different processes, in order to solve the problems, a die steel finishing roll used for an improved F-shaped steel frame and a heat treatment method need to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that prior art exists and propose, its purpose provides the mould steel finish roll that an improved generation F shaped steel frame used.
The technical scheme of the utility model is that: the utility model provides a mould steel finishing roll that improved generation F shaped steel frame was used, includes last roller and rather than complex lower roll, form the left rolling die cavity of rolling left F shaped steel and the right rolling die cavity of rolling right F shaped steel between last roller, the lower roll, be provided with the rolling die cavity of being connected of the two formation processing parts of intercommunication between left side rolling die cavity, the right rolling die cavity, left side F shaped steel, right F shaped steel notch opposite direction.
The left rolling cavity comprises a left web groove at the roller surface of the lower roller, a left web pressing part is formed at the roller surface of the upper roller, and the left web pressing part corresponds to the left web groove, so that the web is rolled.
And a left straight leg groove is formed in the left side of the pressing part of the left web plate in the upper roller and corresponds to the left web plate groove, so that a straight leg is rolled.
And a left inclined leg groove is formed on the right side of the pressing part of the left web plate in the upper roller and corresponds to the left web plate groove, so that inclined legs are rolled.
The left side of the roller surface of the upper roller forms an upper left roller pressing portion, the left side of the roller surface of the lower roller forms a lower left roller pressing portion, and the upper left roller pressing portion and the lower left roller pressing portion are pressed mutually.
And the upper roller surface, the lower roller surface, the upper left roller pressing part and the lower left roller pressing part are matched to roll the wing plate.
And the contact surfaces of the upper left roller pressing part and the lower left roller pressing part are positioned at the central line of the wing plate.
The utility model has the advantages as follows:
the utility model discloses a mould steel finishing roll that improved generation F shaped steel finished product frame was used not only hardness high, and the wearability is good, and roll surface does not have the hardness drop to pass tank bottom basically, possesses very strong toughness and thermal fatigue crack resistance ability moreover, can also produce better red hard during rolling operation, provides strong guarantee for rolled piece surface quality.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic structural view of a double F-shaped steel of the present invention;
wherein:
1 upper roll 2 lower roll
3 upper roll neck 4 upper drive end
5 lower roll neck 6 lower transmission end
7 left upper roller pressing part 8 right upper roller pressing part
9 left lower roller pressing part and 10 right lower roller pressing part
11. Left web plate pressing part of left web plate groove 12
13. Left straight leg groove 14 left inclined leg groove
15. Right web plate opposite pressing part of right web plate groove 16
17. Right straight leg slot 18 right oblique leg slot
19. Upper roll transition connecting part 20 and lower roll transition connecting part
21. Web of wing plate 22
23. The straight leg 24 is a diagonal leg.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1 to 2, a die steel finishing roll used for an improved F-shaped steel frame comprises an upper roll 1 and a lower roll 2 matched with the upper roll, wherein a left rolling cavity for rolling left F-shaped steel and a right rolling cavity for rolling right F-shaped steel are formed between the upper roll 1 and the lower roll 2, a connecting rolling cavity for communicating the left rolling cavity and the right rolling cavity to form a processing part is arranged between the left rolling cavity and the right rolling cavity, and the notches of the left F-shaped steel and the right F-shaped steel face opposite directions.
The left rolling cavity comprises a left web groove 11 at the roller surface of the lower roller 2, a left web pressing part 12 is formed at the roller surface of the upper roller 1, and the left web pressing part 12 corresponds to the left web groove 11, so that a web 22 is rolled.
A left straight leg groove 13 is formed in the left side of the pressing part 12 of the left web plate of the upper roll 1, and the left straight leg groove 13 corresponds to the left web plate groove 11, so that the straight leg 23 is rolled.
A left inclined leg groove 14 is formed in the right side of the pressing portion 12 of the left web plate of the upper roll 1, and the left inclined leg groove 14 corresponds to the left web plate groove 11, so that an inclined leg 24 is rolled.
The left side of the roller surface of the upper roller 1 forms an upper left roller pressing portion 7, the left side of the roller surface of the lower roller 2 forms a lower left roller pressing portion 9, and the upper left roller pressing portion 7 and the lower left roller pressing portion 9 press mutually.
And the roller surface of the upper roller 1, the roller surface of the lower roller 2, the left upper roller pressing part 7 and the left lower roller pressing part 9 are matched to roll the wing plate 21.
The contact surfaces of the upper left roller pressing part 7 and the lower left roller pressing part 9 are positioned at the center line of the wing plate 21.
Specifically, the right rolling cavity comprises a right web groove 15 at the roll surface of the upper roll 1, a right web pressing part 16 is formed at the roll surface of the lower roll 2, and the right web pressing part 16 and the right web groove 15 correspond to each other, so that a web 22 of the right F-shaped steel is rolled.
Specifically, a right straight leg groove 17 is formed in the lower roller 2 on the right side of the right web pressing portion 16, and the right straight leg groove 17 corresponds to the right web groove 15, so that a straight leg 23 of the right F-shaped steel is rolled.
Specifically, a right inclined leg groove 18 is formed in the lower roller 2 on the left side of the right web pressing part 16, and the right inclined leg groove 18 corresponds to the right web groove 15, so that an inclined leg 24 of the right F-shaped steel is rolled.
The right side of the roller surface of the upper roller 1 is provided with a right upper roller pressing portion 8, the right side of the roller surface of the lower roller 2 is provided with a right lower roller pressing portion 10, and the right upper roller pressing portion 8 and the right lower roller pressing portion 10 are pressed mutually.
And the roller surface of the upper roller 1, the roller surface of the lower roller 2, the right upper roller pressing part 8 and the right lower roller pressing part 10 are matched to roll the wing plate 21 of the right F-shaped steel.
Specifically, an upper roll transition connecting part 19 is formed at the roll surface of the upper roll 1, a lower roll transition connecting part 20 is formed at the roll surface of the lower roll 2, and a rolling cavity is connected between the upper roll transition connecting part 19 and the lower roll transition connecting part 20 and is rolled into a secondary processing area.
The utility model provides a mould steel finish roll that improved generation F shaped steel frame was used, mould steel finish roll includes goes up roller 1, lower roll 2, goes up roller 1, lower roll 2 chemical composition and the mass percent content as follows:
C 0.40-0.80%
Si 0.40-0.80%
Mn 0.50-0.80%
Cr 4.0-6.0%
Cr 4.0-6.0%
Mo 0.50-1.00%
Ni 0.50-1.00%
V 0.40-0.80%
Nb 0.20-0.40%
P≤0.020%
S≤0.020%
the balance being Fe and unavoidable impurities.
A heat treatment method of a die steel finishing roll used by an improved F-shaped steel frame comprises the following steps:
A. carrying out hot box opening treatment on the upper roller and the lower roller, and preserving heat for a certain time;
B. the casting stress of the roller blank is eliminated for the upper roller and the lower roller after heat preservation;
C. carrying out diffusion annealing and spheroidizing on the austenitized upper roller and lower roller;
D. normalizing, spray quenching and tempering the spheroidized upper roller and lower roller;
E. obtaining the upper roller and the lower roller after heat treatment.
Step B, the casting stress of the roller blank is eliminated for the upper roller and the lower roller after heat preservation, and the specific process is as follows:
firstly, carrying out diffusion annealing on an upper roller and a lower roller, carrying out austenitizing treatment, and raising the temperature at the speed of 8-10 ℃/h;
then, the roller temperature is increased to 660-680 ℃, the temperature is preserved for 6 hours, and then the temperature is increased at the speed of 10-12 ℃/h;
then, the roller temperature is increased to 880 ℃, the temperature is preserved for 6 to 8 hours, and then the temperature is increased at the speed of 12 to 15 ℃/h;
then, the roller temperature is increased to 1000-1050 ℃, and the temperature is kept;
and finally, hanging the upper roller and the lower roller to a riding wheel for air cooling.
Specifically, the roller temperature is 1000-1050 ℃, and in the heat preservation process, the heat preservation time is determined according to the straight diameter of the roller and meets the requirement of 25mm/h.
Specifically, step C is to perform diffusion annealing and spheroidizing treatment on the austenitized upper roller and lower roller, and the process aims to refine roller grains and uniformly distribute a metal microstructure.
Step C, carrying out diffusion annealing and spheroidizing treatment on the austenitized upper roller and lower roller, and the specific process is as follows:
firstly, when the surface of a roller is cooled to 450-550 ℃, the roller is returned to a furnace for spheroidization;
then, the roller is returned to the furnace and is kept at the constant temperature for 2 to 3 hours, and then the temperature is increased at the speed of 10 to 15 ℃/h;
finally, the roller temperature is increased to 780-850 ℃, and the heat preservation is carried out for 4-6/h.
Specifically, the step D is to carry out normalizing, spray quenching and tempering treatment on the upper roller and the lower roller after the spheroidizing treatment, and the specific process is as follows:
firstly, cooling the roller in air to 450-530 ℃ and returning to the furnace for normalizing, wherein the temperature rising speed of the normalizing is 15-20 ℃/h;
then, the roller temperature is up to 660-680 ℃, the temperature is preserved for 6 hours, and then the temperature is raised at the speed of 20 ℃/h;
then, keeping the temperature of the roller to 960-980 ℃ for 25 mm/h;
then, lifting a spray quenching machine for spray quenching within 3 minutes, carrying out spray quenching by using a wind pressure of 0.2-0.25Mpa and a water pressure of 0.15Mpax10min +0.12Mpax10min +0.04MpaX30min for graded cooling, and blowing after stopping water;
then, the roller enters the furnace for tempering when the temperature of the roller reaches 450-530 ℃, and the roller is kept at the constant temperature for 3 hours after entering the furnace;
and then, heating the roller, wherein the temperature is continuously increased by 10-15 ℃/h, keeping the temperature of the roller at 620 ℃ and 10 ℃, and rapidly cooling the furnace after the temperature is kept for 6-8 hours at the furnace cooling speed of 30 ℃/h.
And E, obtaining the upper roller and the lower roller after heat treatment, wherein the specific properties of the upper roller and the lower roller are as follows:
the roll surface hardness of the roll is 68-73HSD, the working layer hardness fall is less than or equal to 2HSD, and the roll neck hardness is 40-45HSD.
The tensile strength of the roll neck of the roll is more than or equal to 650Mpa.
The metallographic matrix structure of the roller is as follows: fine carbonization 6-8% + tempered sorbite + bainite + a small amount of martensite.
The utility model discloses a mould steel finishing roll that improved generation F shaped steel finished product frame was used not only hardness high, and the wearability is good, and roll surface does not have the hardness drop to pass tank bottom basically, possesses very strong toughness and thermal fatigue crack resistance ability moreover, can also produce better red hard during rolling operation, provides strong guarantee for rolled piece surface quality.
Claims (7)
1. The utility model provides a mould steel finish roll that improved generation F shaped steel frame was used, includes last roller (1) and rather than complex lower roll (2), its characterized in that: the left rolling cavity for rolling the left F-shaped steel and the right rolling cavity for rolling the right F-shaped steel are formed between the upper roller (1) and the lower roller (2), the connecting rolling cavity for communicating the left rolling cavity and the right rolling cavity to form a processing part is arranged between the left rolling cavity and the right rolling cavity, and the direction of notches of the left F-shaped steel and the right F-shaped steel is opposite.
2. The die steel finishing roll for the improved F-shaped steel frame as claimed in claim 1, characterized in that: the left rolling die cavity comprises a left web groove (11) in the roll surface of the lower roll (2), a left web pressing part (12) is formed in the roll surface of the upper roll (1), and the left web pressing part (12) corresponds to the left web groove (11) so as to roll a web (22).
3. The die steel finishing roll for the improved F-type steel frame as claimed in claim 2, wherein: a left straight leg groove (13) is formed in the left side of the pressing portion (12) of the left web plate in the upper roller (1), and the left straight leg groove (13) corresponds to the left web plate groove (11) so as to roll the straight leg (23).
4. The die steel finishing roll for the improved F-shaped steel frame as claimed in claim 3, wherein: and a left inclined leg groove (14) is formed in the right side of the left web pressing part (12) in the upper roller (1), and the left inclined leg groove (14) corresponds to the left web groove (11), so that an inclined leg (24) is rolled.
5. The die steel finishing roll for the improved F-shaped steel frame as claimed in claim 4, wherein: the roller surface left side of going up roller (1) forms upper left roller pressfitting portion (7), the roller surface left side of lower roll (2) forms lower left roller pressfitting portion (9), upper left roller pressfitting portion (7), lower left roller pressfitting portion (9) are pressed mutually.
6. The die steel finishing roll for the improved F-shaped steel frame as claimed in claim 5, characterized in that: and the roller surface of the upper roller (1), the roller surface of the lower roller (2), the left upper roller pressing part (7) and the left lower roller pressing part (9) are matched to roll the wing plate (21).
7. The die steel finishing roll for the improved F-shaped steel frame as claimed in claim 6, characterized in that: the contact surfaces of the upper left roller pressing part (7) and the lower left roller pressing part (9) are positioned at the center line of the wing plate (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222696267.1U CN218532320U (en) | 2022-10-13 | 2022-10-13 | Die steel finishing roll for improved F-shaped steel frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222696267.1U CN218532320U (en) | 2022-10-13 | 2022-10-13 | Die steel finishing roll for improved F-shaped steel frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218532320U true CN218532320U (en) | 2023-02-28 |
Family
ID=85277822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222696267.1U Active CN218532320U (en) | 2022-10-13 | 2022-10-13 | Die steel finishing roll for improved F-shaped steel frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218532320U (en) |
-
2022
- 2022-10-13 CN CN202222696267.1U patent/CN218532320U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113416818B (en) | Heat treatment process of high-strength and high-toughness bainite/martensite multiphase bainite steel rail | |
| CN107475616B (en) | High-strength tenacity pearlite steel rail and its manufacturing method | |
| CN101215624B (en) | On-line quenching production technique for high toughness thick steel plate | |
| CN102108469A (en) | Hot rolling hot straightening roll suitable for thick steel plates with thickness of less than or equal to 60mm and preparation method thereof | |
| US9394581B2 (en) | Heat treatment method for bainitic turnout rail | |
| CN115505713B (en) | Heat treatment process for reducing residual stress of hundred-meter online heat-treated bainitic steel rail | |
| CN111826580B (en) | High-strength easy-to-weld steel plate for ultra-thick large hydropower station and production method thereof | |
| CN101818236B (en) | Method for manufacturing high carbon steel wheel | |
| CN103014529A (en) | Low-carbon martensite cast steel material for railway wagon coupler | |
| CN109518090B (en) | Bainite steel for frog point rail and manufacturing method thereof | |
| CN218532320U (en) | Die steel finishing roll for improved F-shaped steel frame | |
| CN109930065B (en) | Composite high-speed steel supporting roll and preparation method thereof | |
| CN115612794A (en) | Die steel finishing roll for improved F-shaped steel frame and heat treatment method | |
| CN115233503A (en) | Medium-strength steel rail with high yield strength and production method thereof | |
| CN114807757A (en) | Die steel roll for large and medium channel steel finished product rack and casting process thereof | |
| CN114855088A (en) | Production method for controlling depth of decarburized layer of tool steel wire rod | |
| CN107217211A (en) | A kind of flange disk-like accessory and its manufacture method | |
| CN114182181A (en) | Steel ball rolled by using high-carbon steel as raw material and rolling process | |
| CN111101077B (en) | Low-cost high-wear-resistance stretch reducing roller and heat treatment process thereof | |
| CN219112510U (en) | Improved high-carbon semisteel finish rolling section steel roller for rolling railway gauge baffle | |
| CN105648349B (en) | A kind of preparation method of cut deal hot straightening roll | |
| CN107419175B (en) | Economical tool steel with good fatigue life and production method thereof | |
| CN220760555U (en) | Novel nickel-chromium-molybdenum nodular cast iron combined roller special for butterfly grooved rolling angle steel | |
| CN114774790B (en) | Round steel for large-size low-yield-ratio gear and preparation method thereof | |
| CN216857759U (en) | Novel bar wire nonporous rolled chromium alloy centrifugal cast roughing roll |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |