CN111687208A - Square billet production and transformation process - Google Patents
Square billet production and transformation process Download PDFInfo
- Publication number
- CN111687208A CN111687208A CN201910200627.4A CN201910200627A CN111687208A CN 111687208 A CN111687208 A CN 111687208A CN 201910200627 A CN201910200627 A CN 201910200627A CN 111687208 A CN111687208 A CN 111687208A
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- Prior art keywords
- billet
- square
- steel billet
- square steel
- cooling
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000009466 transformation Effects 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000010008 shearing Methods 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 230000000704 physical effect Effects 0.000 claims abstract description 4
- 238000011112 process operation Methods 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000011265 semifinished product Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
-
- 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a square billet production and transformation process, which comprises a heating furnace, a rolling mill, a shearing machine and a cooling machine. And (2) checking and accepting the steel blanks, sending the steel blanks qualified through checking and accepting into a heating furnace for heating, sending the heated steel blanks into a rolling mill, manufacturing the steel blanks into 165 square steel blanks, then sending into a cooling machine, cooling the high-temperature 165 square steel blanks with the temperature of more than 800 ℃ to the temperature of below 150-100 ℃ by using a cooling bed and a cooling roller way in the cooling machine so as to recover the inherent physical properties of the steel and be convenient for ensuring the shearing quality and the subsequent process operation, sending the cooled square steel blanks into a shearing machine, shearing off the parts influencing the use of the square steel blanks, such as the heads and the tails of the steel, cutting into required lengths according to the lengths customized by a client, inspecting the sheared square steel blanks, and storing the qualified square steel blanks in a warehouse. The invention has the advantages of improving the yield to 97.65 percent on the basis of 97.52 percent of the existing yield, improving the yield by 0.13 percent and reducing the production cost.
Description
Technical Field
The invention relates to the technical field of 165 square billet production, in particular to a square billet production transformation process.
Background
With the development of market economy, how to exert the technical advantages of enterprises, improve the yield and the quality, reduce the cost and provide high-quality and low-cost products for the society is particularly important. The problem of restricting the production efficiency must be modified.
The billet is a semi-finished product for producing steel and generally cannot be directly used by the society. The steel billet and the steel material have strict division standards, and cannot be determined whether to be an enterprise final product or not, but are executed according to a socially uniform standard. Generally, steel billets are easily distinguished from steel, but for some billets, which have the same specification and the same purpose as steel, they can be distinguished by whether they are used in other industries, whether they are processed by steel processing processes, and whether they are processed by finishing mills.
For the square billet production process, the rolling raw materials in the original process flow are small in size and weight, 150 square billets are difficult to meet the production requirements of bars, meanwhile, the yield of the 150 square billets during rolling is low, the production cost is increased, and the enterprise income is reduced, so that 165 square billets need to be produced, and the production process is improved.
Disclosure of Invention
The invention aims to provide a production and transformation process of square billets, which has the advantages of improving the yield to 97.65 percent on the basis of 97.52 percent of the existing yield, improving the yield by 0.13 percent and reducing the production cost, and solves the problems of lower yield, increased production cost and reduced enterprise revenue when 150 square billets are rolled.
In order to achieve the purpose, the invention provides the following technical scheme: a square billet production and transformation process comprises a heating furnace, a rolling mill, a shearing machine and a cooling machine, and comprises the following steps:
the method comprises the following steps: and (3) checking and accepting the steel billet, wherein the steel billet checking and accepting program comprises the following steps: checking an object card, measuring the outline dimension, checking and recording the surface quality, sending the steel billet which is qualified in check to a heating furnace for heating, and sending the unqualified steel billet to the heating furnace;
step two: heating the steel billet fed into the heating furnace by the heating furnace, wherein the heating furnace is divided into three sections for heating;
step three: the heated billet is fed into a rolling mill, and the rolling process generally comprises a roughing mill, a medium rolling mill and a finishing mill. Respectively carrying out the functions of billet section compression, semi-finished product rolling deformation and finished product rolling, and manufacturing the billet into a 165 square billet;
step four: the 165 square steel billet made by the rolling mill is sent into a cooling bed of a cooling machine, the cooling bed and a cooling roller bed in the cooling machine cool the high-temperature 165 square steel billet with the temperature of more than 800 ℃ to the temperature of below 150-100 ℃ so as to recover the inherent physical properties of the steel and be convenient for ensuring the shearing quality and the subsequent process operation:
step five: sending the cooled square steel billet into a shearing machine, shearing off parts which influence the use of the square steel billet, such as the head and the tail of a steel material, and cutting the square steel billet into required lengths according to the length customized by a client;
step six: inspecting the cut square billet, wherein the product inspection comprises the following steps: the external dimension, the surface quality, the length, the weight deviation, the processing performance, the mechanical performance and the like of the square steel billet, the square steel billet which does not meet the product quality standard is picked out and treated in a classified way, and the qualified square steel billet is stored in a warehouse.
Preferably, the rolling mill is changed from non-groove rolling to groove rolling.
Preferably, the power of the DC transmission main motor of the 3H and 4V rolling mill is increased from the current 535kW to 650 kW.
Compared with the prior art, the invention has the following beneficial effects: a square billet production and transformation process changes an original 150 square billet into a 165 square billet, a rolling mill changes hole-free rolling into hole-type rolling, the yield is improved, the power of a direct-current transmission main motor of a 3H rolling mill and a 4V rolling mill is improved from the current 535kW to 650kW according to force energy calculation, the yield is improved to 97.65 percent on the basis of 97.52 percent of the current yield, the yield is improved by 0.13 percent, and the production cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a 165 square billet production process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention: a square billet production and transformation process comprises a heating furnace, a rolling mill, a shearing machine and a cooling machine, and comprises the following steps:
the method comprises the following steps: and (3) checking and accepting the steel billet, wherein the steel billet checking and accepting program comprises the following steps: checking an object card, measuring the outline dimension, checking and recording the surface quality, sending the steel billet which is qualified in check to a heating furnace for heating, and sending the unqualified steel billet to the heating furnace;
step two: heating the steel billet fed into the heating furnace by the heating furnace, wherein the heating furnace is divided into three sections for heating;
step three: the heated billet is fed into a rolling mill, and the rolling process generally comprises a roughing mill, a medium rolling mill and a finishing mill. Respectively carrying out the functions of billet section compression, semi-finished product rolling deformation and finished product rolling, and manufacturing the billet into a 165 square billet;
step four: the 165 square steel billet made by the rolling mill is sent into a cooling bed of a cooling machine, the cooling bed and a cooling roller bed in the cooling machine cool the high-temperature 165 square steel billet with the temperature of more than 800 ℃ to the temperature of below 150-100 ℃ so as to recover the inherent physical properties of the steel and be convenient for ensuring the shearing quality and the subsequent process operation:
step five: sending the cooled square steel billet into a shearing machine, shearing off parts which influence the use of the square steel billet, such as the head and the tail of a steel material, and cutting the square steel billet into required lengths according to the length customized by a client;
step six: inspecting the cut square billet, wherein the product inspection comprises the following steps: the external dimension, the surface quality, the length, the weight deviation, the processing performance, the mechanical performance and the like of the square steel billet, the square steel billet which does not meet the product quality standard is picked out and treated in a classified way, and the qualified square steel billet is stored in a warehouse.
Further, the rolling mill is changed from non-pass rolling to pass rolling.
Further, the power of the DC transmission main motor of the 3H and 4V rolling mill is increased from the current 535kW to 650 kW.
Example 2
A production and transformation process of square billets comprises the following steps:
three-stage heating of the heating furnace: the heating procedure is divided into three sections: the first stage of preheating, namely preheating the steel blank by using the waste heat of the heating flue gas, wherein the preheating temperature reaches 350-450 ℃; heating the second section, and heating the preheated billet to 1100-1200 ℃; the third section is a soaking section, so that the temperature difference between the inside and the outside of the billet is reduced, the black mark of the water-cooling slideway is eliminated, and the heating quality is stable and uniform.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (3)
1. A square billet production and transformation process comprises a heating furnace, a rolling mill, a shearing machine and a cooling machine, and is characterized in that: the method comprises the following steps:
the method comprises the following steps: and (3) checking and accepting the steel billet, wherein the steel billet checking and accepting program comprises the following steps: checking an object card, measuring the outline dimension, checking and recording the surface quality, sending the steel billet which is qualified in check to a heating furnace for heating, and sending the unqualified steel billet to the heating furnace;
step two: heating the steel billet fed into the heating furnace by the heating furnace, wherein the heating furnace is divided into three sections for heating;
step three: the heated billet is fed into a rolling mill, and the rolling process generally comprises a roughing mill, a medium rolling mill and a finishing mill. Respectively carrying out the functions of billet section compression, semi-finished product rolling deformation and finished product rolling, and manufacturing the billet into a 165 square billet;
step four: the 165 square steel billet made by the rolling mill is sent into a cooling bed of a cooling machine, the cooling bed and a cooling roller bed in the cooling machine cool the high-temperature 165 square steel billet with the temperature of more than 800 ℃ to the temperature of below 150-100 ℃ so as to recover the inherent physical properties of the steel and be convenient for ensuring the shearing quality and the subsequent process operation:
step five: sending the cooled square steel billet into a shearing machine, shearing off parts which influence the use of the square steel billet, such as the head and the tail of a steel material, and cutting the square steel billet into required lengths according to the length customized by a client;
step six: inspecting the cut square billet, wherein the product inspection comprises the following steps: the external dimension, the surface quality, the length, the weight deviation, the processing performance, the mechanical performance and the like of the square steel billet, the square steel billet which does not meet the product quality standard is picked out and treated in a classified way, and the qualified square steel billet is stored in a warehouse.
2. The process of claim 1, wherein the process comprises: the rolling mill is changed from non-pass rolling to pass rolling.
3. The process of claim 1, wherein the process comprises: the power of a direct-current transmission main motor of the 3H and 4V rolling mill is improved to 650kW from the current 535 kW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910200627.4A CN111687208A (en) | 2019-03-16 | 2019-03-16 | Square billet production and transformation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910200627.4A CN111687208A (en) | 2019-03-16 | 2019-03-16 | Square billet production and transformation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111687208A true CN111687208A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910200627.4A Pending CN111687208A (en) | 2019-03-16 | 2019-03-16 | Square billet production and transformation process |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083906A (en) * | 2021-02-22 | 2021-07-09 | 阳春新钢铁有限责任公司 | Production control method for reducing deformed steel bar detection waste |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101596546A (en) * | 2009-07-02 | 2009-12-09 | 盐城市联鑫钢铁有限公司 | A kind of steel rolling production technology that is applied in the iron and steel production |
| CN101607262A (en) * | 2009-07-14 | 2009-12-23 | 盐城市联鑫钢铁有限公司 | A kind of production technology procedures for steel rolling |
| CN203664356U (en) * | 2013-11-05 | 2014-06-25 | 山东西王特钢有限公司 | Hole pattern structure of mill train |
| CN105983573A (en) * | 2015-01-30 | 2016-10-05 | 重庆君卓机械有限公司 | Rolled steel production process |
-
2019
- 2019-03-16 CN CN201910200627.4A patent/CN111687208A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101596546A (en) * | 2009-07-02 | 2009-12-09 | 盐城市联鑫钢铁有限公司 | A kind of steel rolling production technology that is applied in the iron and steel production |
| CN101607262A (en) * | 2009-07-14 | 2009-12-23 | 盐城市联鑫钢铁有限公司 | A kind of production technology procedures for steel rolling |
| CN203664356U (en) * | 2013-11-05 | 2014-06-25 | 山东西王特钢有限公司 | Hole pattern structure of mill train |
| CN105983573A (en) * | 2015-01-30 | 2016-10-05 | 重庆君卓机械有限公司 | Rolled steel production process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083906A (en) * | 2021-02-22 | 2021-07-09 | 阳春新钢铁有限责任公司 | Production control method for reducing deformed steel bar detection waste |
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Application publication date: 20200922 |