CN114669599A - Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press - Google Patents
Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press Download PDFInfo
- Publication number
- CN114669599A CN114669599A CN202210187507.7A CN202210187507A CN114669599A CN 114669599 A CN114669599 A CN 114669599A CN 202210187507 A CN202210187507 A CN 202210187507A CN 114669599 A CN114669599 A CN 114669599A
- Authority
- CN
- China
- Prior art keywords
- width
- press
- hammerhead
- cooling water
- machine time
- 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.)
- Pending
Links
- 241000251131 Sphyrna Species 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005098 hot rolling Methods 0.000 title claims abstract description 23
- 239000000498 cooling water Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 23
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 5
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 5
- RGKMZNDDOBAZGW-UHFFFAOYSA-N aluminum calcium Chemical compound [Al].[Ca] RGKMZNDDOBAZGW-UHFFFAOYSA-N 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 18
- 238000004513 sizing Methods 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000001247 metal acetylides Chemical group 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
- B21B15/005—Lubricating, cooling or heating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Golf Clubs (AREA)
Abstract
The invention belongs to the technical field of width fixing machines, and discloses a method for prolonging the on-machine time of a hammerhead of a hot rolling width fixing press, which comprises the following steps: projecting cooling water quantity to the hammerhead of the constant width press based on the opening degree of the hammerhead of the constant width press; controlling the maximum side pressure of the hammerhead of the constant width press based on the width of the supplied materials of the plate blank; the hammer head of the top width press is made of nodular cast iron, the pearlite proportion in a matrix is more than or equal to 85%, and an aluminum-calcium composite deoxidizer and heavy rare earth are added in the production process of the nodular cast iron. The method for prolonging the on-machine time of the hammer head of the hot rolling width-fixing press can effectively prolong the on-machine time.
Description
Technical Field
The invention relates to the technical field of width fixing machines, in particular to a method for prolonging the on-machine time of a hammerhead of a hot rolling width fixing press.
Background
The Slab Sizing Press (Slab Sizing Press) is an important necessary device on a strip steel hot continuous rolling production line, can realize on-line width adjustment of a Slab, reduces the specification of incoming material slabs and simplifies the production process of a continuous casting machine. Referring to fig. 1 and 2, the hammer head of the sizing press is a part which directly contacts with the edge of the slab to reduce the width of the slab in the production process, and the abrasion is the most severe. Along with the use of the hammer head, the abrasion loss is gradually increased, and the equipment needs to be frequently replaced, so that the production efficiency and the use cost are influenced, and the defects of rolling upwarping, fine lines, cracking and the like at the edge of the hot-rolled strip steel can be directly caused by the phenomena of cracks and even chipping on the surface of the abraded hammer head, so that the quality of a hot-rolled product is influenced.
Disclosure of Invention
The invention provides a method for prolonging the on-machine time of a hammerhead of a hot rolling fixed-width press, which solves the technical problems of high speed of hammerhead abrasion loss, high replacement frequency and product quality deterioration of a plate blank fixed-width press in the prior art.
In order to solve the technical problem, the invention provides a method for prolonging the on-machine time of a hammerhead of a hot-rolling fixed-width press, which comprises the following steps:
projecting cooling water quantity to the hammerhead of the constant width press based on the opening degree of the hammerhead of the constant width press;
controlling the maximum side pressure of the hammerhead of the constant width press based on the width of the supplied materials of the plate blank;
the hammer head of the top width press is made of nodular cast iron, the pearlite proportion in a matrix is more than or equal to 85%, and an aluminum-calcium composite deoxidizer and heavy rare earth are added in the production process of the nodular cast iron.
Further, the amount of cooling water projected to the fixed-width press ram head based on the opening of the fixed-width press ram head includes:
when the opening range of the hammerhead of the fixed-width press is 700-1400 mm, a first group of cooling water valves are opened to perform water spraying cooling;
and when the opening range of the hammerhead of the fixed-width press is 1400-2150 mm, simultaneously opening the first group of cooling water valves and the second group of cooling water valves to perform water spraying cooling.
Further, when the opening degree of the hammerhead of the fixed-width press is 1400mm, the first group of cooling water valves and the second group of cooling water valves are opened simultaneously to perform water spraying cooling.
Further, the first set of cooling water valves includes: two rows of cooling water valves.
Further, the second set of cooling water valves includes: two rows of cooling water valves.
Further, the first set of cooling water valves is a single coil pneumatic valve.
Further, the second set of cooling water valves employs a single coil pneumatic valve.
Furthermore, each drain valve of the first group of cooling water valves is provided with a water spray nozzle facing the two hammers.
Furthermore, each drain valve of the second group of cooling water valves is respectively provided with a water spray nozzle facing the two hammers.
Further, the step of controlling the maximum side pressure of the hammer head of the fixed-width press based on the incoming width of the plate blank comprises the following steps:
| width of | Maximum lateral pressure Δ b (mm) |
| w<1000 | 170 |
| 1000≤w<1150 | 190 |
| 1150≤w<1250 | 210 |
| 1250≤w<1350 | 220 |
| 1350≤w<1550 | 250 |
| 1550≤w<1750 | 250 |
| 1750≤w<1900 | 250 |
| 1900≤w | 200 |
And limiting the pressure measurement quantity of the hammerhead of the fixed-width press to be below the maximum pressure measurement quantity delta b according to the width of the supplied materials of the plate blank.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the method for prolonging the on-machine time of the hammer head of the hot rolling fixed-width press, the side pressure control and the cooling process are respectively adopted, and the three layers of the hammer head material control are cooperatively controlled, namely the shape and the quality stability of the hammer head are controlled by matching the material with the cooling process, and the physical abrasion influence is controlled by matching the side pressure control, so that the comprehensive cooperative control is realized, and the on-machine time can be prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view illustrating a state of a hammer head in a field arrangement in the prior art;
fig. 2 is a schematic diagram of a slab adjustment principle of the hammer head in fig. 1;
fig. 3 is a schematic diagram of arrangement of cold water outside a hammer head of a wide pressure machine according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating control of cold water outside a hammerhead of a wide pressure machine according to an embodiment of the present invention;
fig. 5 is a schematic surface topography of a conventional 16Mn hammer used for 1 week;
fig. 6 is a schematic surface topography of the hammerhead of the wide pressure machine according to the embodiment of the invention, which is formed after the hammerhead is used for 3 weeks.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The application is described below with reference to specific embodiments in conjunction with the following drawings.
The embodiment of the application provides a method for prolonging the on-machine time of the hammerhead of the hot rolling fixed-width press, and solves the technical problems that the hammerhead of the plate blank fixed-width press in the prior art is high in abrasion loss speed, high in replacement frequency and poor in product quality.
For better understanding of the above technical solutions, the above technical solutions will be described in detail with reference to the drawings and specific embodiments of the present application, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
The embodiment of the application provides a method for prolonging the on-machine time of a hammerhead of a hot rolling fixed-width press, the online form and the quality stability of the hammerhead are controlled through material control and an online cooling process respectively, and meanwhile, the mechanical damage is reduced and the surface quality of the hammerhead is ensured through the control of side pressure.
As will be specifically explained below.
The method for prolonging the on-machine time of the hammer head of the hot rolling fixed-width press comprises the following steps:
projecting cooling water quantity to the hammerhead of the constant width press based on the opening degree of the hammerhead of the constant width press;
controlling the maximum side pressure of the hammerhead of the constant width press based on the width of the supplied materials of the plate blank;
the hammer head of the top width press is made of nodular cast iron, the pearlite proportion in a matrix is more than or equal to 85%, and an aluminum-calcium composite deoxidizer and heavy rare earth are added in the production process of the nodular cast iron.
The hammer head is a main wear part of the fixed-width press. The selection of the material has a very important influence on the use performance. In the working state, the temperature of the plate blank contacting with the hammer head of the fixed width machine is as high as 1100-1200 ℃, so that the hammer head is required to have good heat cracking resistance, and simultaneously, the hammer head is required to have enough hardness and toughness to resist fatigue stripping and prevent cracking. In the design of the material composition of the hammer head, carbon, silicon, manganese and some alloy elements are usually contained in appropriate amounts. Wherein:
carbon is a main factor influencing the performance of the material, and the hardness and the strength of the material are continuously increased and the plasticity and the toughness are continuously reduced along with the increase of the carbon content in the steel in a certain range;
the silicon plays a role in solid solution strengthening in the steel, so that the strength and the hardness of the steel are improved, and the toughness can be increased while the solid solution strengthening is carried out, because the silicon can inhibit or delay the decomposition of carbides of the super-cooled austenite;
manganese and iron form a solid solution, the strength and toughness of ferrite and austenite in steel are improved, and the manganese can remarkably delay high-temperature transformation under certain conditions, improve bainite hardenability, reduce the transformation starting temperature of bainite, and further increase the strength of a ferrite matrix.
The traditional hammerhead is made of medium-high manganese steel such as 16Mn with mature production process, but the hammerhead is found to have poor heat cracking resistance and short machine time in production practice, so the novel nodular cast iron hammerhead is designed in the patent, and the main alloy components and the content are as follows: the matrix is pearlite with not less than 85%, and adopts Al-Ca composite deoxidizer and adds in proper amount of heavy rare earth. After the hammer head made of the nodular cast iron with the components is used, the on-machine time of the hammer head can be prolonged from 1 week to 3 weeks, and the on-machine period can be prolonged from 25 ten thousand tons to more than 30 ten thousand tons.
Further, the amount of cooling water projected to the fixed-width press ram head based on the opening of the fixed-width press ram head includes:
when the opening range of the hammerhead of the fixed-width press is 700-1400 mm, a first group of cooling water valves are opened to perform water spraying cooling;
and when the opening range of the hammerhead of the fixed-width press is 1400-2150 mm, simultaneously opening the first group of cooling water valves and the second group of cooling water valves to perform water spraying cooling.
It is worth to be noted that when the opening degree of the hammerhead of the fixed-width press is 1400mm, the first group of cooling water valves and the second group of cooling water valves are opened simultaneously to perform water spraying cooling; of course, only the first set of cooling water valves may be opened.
Further, the first set of cooling water valves includes: two rows of cooling water valves; the second set of cooling water valves includes: two rows of cooling water valves; the first group of cooling water valves adopt single-coil pneumatic valves; the second group of cooling water valves is a single coil pneumatic valve.
Furthermore, each drain valve of the first group of cooling water valves is respectively provided with a water spray nozzle facing the two hammers; and each drain valve of the second group of cooling water valves is respectively provided with a water spray nozzle facing the two hammers.
The width fixing machine is arranged at the forefront of a hot rolling process, and a slab directly enters the width fixing machine for width reduction after being discharged from a heating furnace and subjected to descaling. The temperature of the plate blank contacted with the hammer head of the width fixing machine is as high as 1100-1200 ℃, so that the hammer head of the width fixing machine needs to be cooled, the surface temperature of the hammer head is reduced, and the defects of thermal cracks and the like on the surface of the hammer head are avoided. The hammerheads of the width fixing machine are cooled by turbid circulating water, cooling water nozzles are arranged between the hammerheads at two sides of the width fixing machine for cooling the hammerheads, and the arrangement of the hammerhead cooling water nozzles is shown in figures 3 and 4; when the width fixing machine works, aiming at slabs with different width specifications, the slab width fixing press is used for reducing the width through the combined action of the mechanical pressing down of the pre-swing opening degree and the width reduction of the crank connecting rod mechanism, and the opening degree is set before each width reduction.
The width fixing machine hammer is provided with 4 rows of cooling water nozzles, and the corresponding valves are controlled to open different cooling headers according to different opening degrees of the hammer. Often practiced in large quantities, a carefully controlled hammerhead cooling profile is developed, as shown in table 1.
TABLE 1 hammer head Cooling control rules
The influence on the slab quality and the hammer head is realized by tracking the widths of different slabs and reducing the widths in different ways through carding. Different slab widths, when the slab subtracts the width volume when too big, the slab is along surpassing lower extreme on the tup easily from top to bottom, causes tup atress inequality and slab limit portion defect problem. By formulating the width reduction control for different slab widths, a width reduction control rule was developed, as shown in table 2.
TABLE 2 maximum side pressure for different widths
| Width of | Maximum lateral pressure Δ b (mm) |
| w<1000 | 170 |
| 1000≤w<1150 | 190 |
| 1150≤w<1250 | 210 |
| 1250≤w<1350 | 220 |
| 1350≤w<1550 | 250 |
| 1550≤w<1750 | 250 |
| 1750≤w<1900 | 250 |
| 1900≤w | 200 |
And limiting the pressure measurement quantity of the hammerhead of the fixed-width press to be below the maximum pressure measurement quantity delta b according to the width of the supplied materials of the plate blank.
The first embodiment is as follows: change in the mass of the rear surface of the hammer
After using the conventional 16Mn hammer for 1 week, the quality of the surface of the hammer is observed as shown in FIG. 5. After the hammer head made of the nodular cast iron material adopting the components is used for 3 weeks, the quality condition of the surface of the hammer head after being removed from the machine is observed and is shown in figure 6.
In comparison, after the conventional 16Mn hammer head is used for 1 week, a large number of thick line cracks appear on the surface, and the situation that the blocks are locally fallen off is already generated. And the nodular cast iron material tup of this patent composition uses 3 weeks after, and a large amount of tiny crackles appear in the tup surface, and surface material is complete, the local condition of falling the piece does not appear. Therefore, the machine time can be prolonged from 1 week to 3 weeks by using the hammer head.
The second embodiment: temperature change of rear surface of hammer head lower machine
After the hammer head is taken down, the infrared thermometers are adopted to measure the temperatures of different positions of the surface of the hammer head, and the results are shown in table 3.
As can be seen by comparison, after the application of the hammer head temperature control device, the temperature of the hammer head surface is reduced to about 30 ℃ from about 60 ℃ before.
Table 3 temperature of the surface of the hammer before and after the application of this patent
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the method for prolonging the on-machine time of the hammer head of the hot rolling fixed-width press, the side pressure control and the cooling process are respectively adopted, and the three layers of the hammer head material control are cooperatively controlled, namely the shape and the quality stability of the hammer head are controlled by matching the material with the cooling process, and the physical abrasion influence is controlled by matching the side pressure control, so that the comprehensive cooperative control is realized, and the on-machine time can be prolonged.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
Furthermore, descriptions in this application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification can be combined and combined by a person skilled in the art
While the preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. The method for prolonging the on-machine time of the hammerhead of the hot rolling width-fixing press is characterized by comprising the following steps:
projecting cooling water quantity to the hammerhead of the constant width press based on the opening degree of the hammerhead of the constant width press;
controlling the maximum side pressure of the hammerhead of the constant width press based on the width of the supplied materials of the plate blank;
the hammer head of the top width press is made of nodular cast iron, the pearlite proportion in a matrix is more than or equal to 85%, and an aluminum-calcium composite deoxidizer and heavy rare earth are added in the production process of the nodular cast iron.
2. The method for prolonging the on-machine time of a hot rolling width-fixed press ram head according to claim 1, wherein the projecting the amount of cooling water to the width-fixed press ram head based on the opening degree of the width-fixed press ram head comprises:
When the opening range of the hammerhead of the fixed-width press is 700-1400 mm, opening a first group of cooling water valves and performing water spray cooling;
and when the opening range of the hammerhead of the fixed-width press is 1400-2150 mm, simultaneously opening the first group of cooling water valves and the second group of cooling water valves to perform water spraying cooling.
3. The method for prolonging the on-machine time of the hammer head of the hot rolling fixed-width press as claimed in claim 2, wherein when the opening degree of the hammer head of the fixed-width press is 1400mm, the first group of cooling water valves and the second group of cooling water valves are opened simultaneously to perform water spraying cooling.
4. The method for extending the on-machine time of a hammer head of a hot rolling sizing press of claim 2, wherein the first set of cooling water valves comprises: two rows of cooling water valves.
5. The method for extending the on-machine time of a hammer head of a hot rolling sizing press of claim 2, wherein the second set of cooling water valves comprises: two rows of cooling water valves.
6. The method for prolonging the on-machine time of a hammer head of a hot rolling sizing press according to claim 4, wherein the first set of cooling water valves is a single coil pneumatic valve.
7. The method for prolonging the on-machine time of a hammer head of a hot rolling sizing press according to claim 5, wherein the second set of cooling water valves is a single coil pneumatic valve.
8. The method for prolonging the on-machine time of the hammerhead of the hot rolling sizing press according to claim 4, wherein a water spray nozzle facing the two hammerheads is respectively arranged in each water discharge valve of the first group of cooling water valves.
9. The method for prolonging the on-machine time of the hammerhead of the hot rolling sizing press according to claim 5, wherein a water spray nozzle facing the two hammerheads is respectively arranged in each water discharge valve of the second group of cooling water valves.
10. The method for prolonging the on-machine time of a hot rolling sizing press ram head according to claim 1, wherein the controlling the maximum side pressure of the sizing press ram head based on the incoming width of the slab comprises:
And limiting the pressure measurement quantity of the hammerhead of the fixed-width press to be below the maximum pressure measurement quantity delta b according to the width of the supplied materials of the plate blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187507.7A CN114669599A (en) | 2022-02-28 | 2022-02-28 | Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187507.7A CN114669599A (en) | 2022-02-28 | 2022-02-28 | Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114669599A true CN114669599A (en) | 2022-06-28 |
Family
ID=82072431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210187507.7A Pending CN114669599A (en) | 2022-02-28 | 2022-02-28 | Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114669599A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010207824A (en) * | 2009-03-06 | 2010-09-24 | Jfe Steel Corp | Method of manufacturing hot-rolled steel strip |
| CN103223423A (en) * | 2013-04-18 | 2013-07-31 | 北京金自天正智能控制股份有限公司 | Control method for walking-stopping type high-side-pressure sizing press |
| CN103627982A (en) * | 2013-11-11 | 2014-03-12 | 马鞍山市恒毅机械制造有限公司 | Alloy material for high-boron high-wear-resistance hammerhead and preparation method thereof |
| CN103722015A (en) * | 2013-12-31 | 2014-04-16 | 一重集团大连设计研究院有限公司 | On-line width adjusting device of hot rolled strip steel production line |
| CN203621094U (en) * | 2013-12-31 | 2014-06-04 | 一重集团大连设计研究院有限公司 | On-line width adjusting device for hot rolling strip steel production line |
| CN107502832A (en) * | 2017-07-25 | 2017-12-22 | 北京科技大学 | A kind of double quenching partition process for high speed tup abrasion-resistant stee steel and preparation method thereof |
| CN207681171U (en) * | 2017-11-16 | 2018-08-03 | 北京首钢股份有限公司 | A kind of tup for constant width machine |
| CN109261717A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | The milling method of product quality of edges is improved in a kind of production of cold rolled silicon steel |
| CN109985908A (en) * | 2017-12-31 | 2019-07-09 | 上海东新冶金技术工程有限公司 | Hot rolling constant width machine SP module and its application method |
-
2022
- 2022-02-28 CN CN202210187507.7A patent/CN114669599A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010207824A (en) * | 2009-03-06 | 2010-09-24 | Jfe Steel Corp | Method of manufacturing hot-rolled steel strip |
| CN103223423A (en) * | 2013-04-18 | 2013-07-31 | 北京金自天正智能控制股份有限公司 | Control method for walking-stopping type high-side-pressure sizing press |
| CN103627982A (en) * | 2013-11-11 | 2014-03-12 | 马鞍山市恒毅机械制造有限公司 | Alloy material for high-boron high-wear-resistance hammerhead and preparation method thereof |
| CN103722015A (en) * | 2013-12-31 | 2014-04-16 | 一重集团大连设计研究院有限公司 | On-line width adjusting device of hot rolled strip steel production line |
| CN203621094U (en) * | 2013-12-31 | 2014-06-04 | 一重集团大连设计研究院有限公司 | On-line width adjusting device for hot rolling strip steel production line |
| CN107502832A (en) * | 2017-07-25 | 2017-12-22 | 北京科技大学 | A kind of double quenching partition process for high speed tup abrasion-resistant stee steel and preparation method thereof |
| CN207681171U (en) * | 2017-11-16 | 2018-08-03 | 北京首钢股份有限公司 | A kind of tup for constant width machine |
| CN109985908A (en) * | 2017-12-31 | 2019-07-09 | 上海东新冶金技术工程有限公司 | Hot rolling constant width machine SP module and its application method |
| CN109261717A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | The milling method of product quality of edges is improved in a kind of production of cold rolled silicon steel |
Non-Patent Citations (1)
| Title |
|---|
| 赵金凯;张达;于绍清;: "定宽压力机在热轧生产线的创新应用", 河北冶金, no. 1, 28 June 2020 (2020-06-28), pages 76 - 78 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4513608B2 (en) | Hot-pressed steel sheet member and its manufacturing method | |
| CN107779577B (en) | A kind of garden tool set steel that processing performance is excellent and its production method | |
| US7909950B2 (en) | Method for manufacturing an ultra soft high carbon hot-rolled steel sheet | |
| CN103409696B (en) | Hot rolling roller for rolling nonferrous metal, and manufacturing method thereof | |
| CN101410544A (en) | Hot-rolled ultra soft high-carbon steel plate and process for production thereof | |
| US20090173415A1 (en) | Steel Sheet Excellent In Fine Blanking Performance and Manufacturing Method of the Same | |
| CN109234495B (en) | Continuous casting production process of SM4Gr2MnNi die steel plate with low compression ratio and high flaw detection requirement | |
| CN101147920A (en) | Hot rolled steel plate surface oxidation iron sheet control method for vanadium-containing automobile beam | |
| CN111085542B (en) | Method for improving pitting defects on surface of cold-rolled 316L stainless steel | |
| CN110527920B (en) | 60-80 mm super-thick wear-resistant steel plate and production method thereof | |
| RU2743534C1 (en) | Method for manufacturing railway rails of increased wear resistance and contact endurance | |
| CN114669599A (en) | Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press | |
| CN110079733B (en) | Ultra-thin ultra-high strength medium carbon bainite steel and manufacturing method thereof | |
| CN109022737B (en) | Method for regulating and controlling 50CrVA hardness of alloy structural steel | |
| CN115815322A (en) | Optimized combination configuration method for narrow strip steel rolling mill rollers | |
| CN113996665B (en) | Production process for rolling extreme thin-specification checkered plate by thin slab | |
| CN104998917A (en) | Method for removing streak defects on hot rolled steel plate surface | |
| JP2010024551A (en) | Steel sheet to be hot-pressed | |
| CN112779466B (en) | Preparation method of chromium alloy strip steel supporting roll | |
| CN114774774A (en) | Round steel for large-diameter low-segregation oil cylinder piston rod and manufacturing method thereof | |
| CN113817959A (en) | Steel plate with yield strength of 345MPa grade and thickness of 8mm for bridge and production method thereof | |
| JP3528688B2 (en) | Tapered steel plate manufacturing method | |
| Martini et al. | New generation of wear-resistant bimetallic rolls for sheet mills | |
| CN115305330B (en) | Plate shape control method for 460 MPa-level thick steel plate with thickness of more than 50mm | |
| JPH06271935A (en) | Production of high carbon cold rolled steel sheet small in anisotropy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |