CN109355453A - A kind of production method reducing gren rod surface red rust - Google Patents
A kind of production method reducing gren rod surface red rust Download PDFInfo
- Publication number
- CN109355453A CN109355453A CN201811433412.9A CN201811433412A CN109355453A CN 109355453 A CN109355453 A CN 109355453A CN 201811433412 A CN201811433412 A CN 201811433412A CN 109355453 A CN109355453 A CN 109355453A
- Authority
- CN
- China
- Prior art keywords
- production method
- red rust
- molten iron
- water
- steel
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0281—Cleaning devices removing liquids removing coolants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0287—Cleaning devices removing solid particles, e.g. dust, rust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of production methods for reducing Surfaces of Hot Rolled Strip red rust, method includes the following steps: carrying out desulfurization to molten iron before steel-making, control sulfur content≤0.005wt%；It is conventional to carry out converter smelting, in tapping 1/3 to 2/3, FeMnSi and FeMn is added and carries out deoxidation, and controlling the Si content in molten steel is 0.159~0.185%；Electric furnace refining is carried out, refining time is not less than 30 minutes；Then continuous casting is carried out, obtains square billet, then carry out de-scaling；It after pair rolling, is water-cooled, after reversed air purging, batches.The method of the present invention has found the key parameters such as molten iron silicon content, quality of cooling water and reverse blow pressure accurately, successfully solves in wire rod production and is also easy to produce this industrial circle common problem of red rust, has significant progress.
Description
Technical field
The invention belongs to metallurgy industry technical field of surface, and in particular to a kind of to reduce gren rod surface red rust
Hot-rolling method.
Background technique
Current course of hot rolling generally by heating-rolling-control it is cold-collection volume-packing completes.Red rust is inhibited to be formed
Measure mainly has adjustment molten steel composition, rolling temperature control etc., but effect is all not fully up to expectations.
Chinese patent ZL 201510366043.3 discloses a kind of life that can prevent 65Mn barrel band surface from generating red rust
Production method, be first to molten iron carry out desulfurization, control sulfur content≤0.005wt%, then carry out converter smelting, refining, continuous casting,
It pair rolling and batches.The factors meetings such as strip, ingress of air area is big, and cooling velocity is fast, and surface smoothness is overproof
The generation of surface red rust is seriously affected, and reducing S content is the red rust formation probability that can reduce belt steel surface, and can not
Prevent the generation of red rust completely, and to the inhibition red rust problem of gren rod without obvious directive significance.For gren rod,
The red rust formation on surface is caused by many factors.
Applicant's early-stage study finds that Si belongs to red rust sensitive elements in molten steel, and the red of wire rod can be inhibited by reducing Si element
Rust, so accurately controlling Si content is the difficult point in steelmaking process.In our company course of hot rolling, high-speed rod is that stelmor is cold
But, at present when carrying out reverse blow using cooling water, situations such as corrosion because of equipment, reverse blow is not clean enough, aggravates instead
The generation of red rust；In addition, the size of hydraulic pressure and water is to red rust effect is inhibited, there is also larger impacts；The water of coastal area is general
It all over being Acidic water, and recycles impurities in water, oiliness and excessively can seriously reduce cooling capacity, promote wire rod surface red rust shape
At.
Summary of the invention
In order to overcome the technological deficiency in existing wire rod production process, the purpose of the present invention is to provide a kind of reduction hot rollings
The production method of wire rod surface red rust.
The purpose of the invention is achieved by the following technical solution:
A kind of production method reducing Surfaces of Hot Rolled Strip red rust, comprising the following steps:
(1) desulfurization is carried out to molten iron before steel-making, controls sulfur content≤0.005wt%；
For lime and fluorite, lime is added the desulfurizing agent that step (1) uses according to 5.4-9.0kg/ tons of molten iron, fluorite according to
0.6-1.0kg/ tons of molten iron are added；Molten iron temperature is controlled at 1220-1350 DEG C；In the ore matching of blast furnace process, wanted according to ingredient
It asks and ore containing Cr is added；
(2) conventional to carry out converter smelting, in tapping 1/3 to 2/3, FeMnSi and FeMn is added and carries out deoxidation, and controls
Si content in molten steel is 0.159~0.185%；
The silicone content for the gren rod product (such as HPB300 wire rod) of red rust occur to surface statisticallys analyze, and finds general
Store-through in the higher phenomenon of silicone content (Si content be 0.21~0.25%), although meet relevant criterion control range (0.12~
0.25%), but all in the middle upper limit of critical field.The present invention attempts to find the control of Si content 0.159~0.185%
The generation of red rust can be efficiently reduced.
In step (2), tapping temperature is controlled at 1620-1645 DEG C；FeMnSi therein is added according to 5-8kg/ tons of steel,
FeMn is added according to 5-8kg/ tons of steel；
(3) electric furnace refining is carried out, refining time is not less than 30 minutes；Then continuous casting is carried out, obtains square billet, then removed
Squama；
(4) it after pair rolling, is water-cooled, after reversed air purging, batches；
Step is water-cooled described in (4), can seriously if suspended matter, impurity and oil content are higher in cooling water
Cooling capacity is reduced, the formation of wire rod surface red rust is promoted.This is because impurities in water and oil can reduce the thermal conductivity of water, hinder
The transmitting of heat promotes the formation of wire rod surface steam blanket, accelerates the extent of reaction of wire rod surface metal and steam, to be formed
Red rust.The present invention purifies cooling water, after discovery cooling water conductivity is down to 800us/cm or less, can subtract significantly
The generation of few surface red rust；
It is highly preferred that the pH value of cooling water is 7.0-8.0.
Reversed air purging, effect are the water and attachment that wire surface after water is worn in removing described in step (4), to protect
Demonstrate,prove the surface quality of wire rod.It is a discovery of the invention that the pressure that reversed air is purged is controlled in 0.6MPa, wire rod is discharged rear surface
Substantially without water, and surface red rust degree mitigates.After closing reversed air purging device, band water is more serious after wire rod water outlet, table
The aggravation of flushing rust degree, illustrate it is cooling after band water be one of the reason of promoting surface to generate red rust.
The present invention has the following advantages and effects with respect to the prior art:
1, the method for the present invention has found the key parameters such as molten iron silicon content, quality of cooling water and reverse blow pressure accurately, success
It solves in wire rod production and is also easy to produce this industrial circle common problem of red rust, there is significant progress.
2, the method for the present invention does not also increase energy consumption to the small investment of equipment aspect.The improvement of quality of cooling water is removed, and is not required to
Want other additional investments.
3, the method for the present invention is few to the transformation of prior art process, and the transformation time is short.It can be in original device space position
Set arrangement in range, overhaul or in repair synchronous transformation in the phase and implement to complete, be generally applicable in.
4, the method for the present invention is easy to operate, and all technical solutions are executed after approving by written standards.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Embodiment 1
A kind of production method reducing HPB300 wire rod surface red rust, comprising the following steps:
(1) desulfurization is carried out to molten iron before steel-making, controls sulfur content≤0.005wt%；
(2) conventional to carry out converter smelting, in tapping 1/3 to 2/3, FeMnSi and FeMn is added and carries out deoxidation, and controls
Si content in molten steel is 0.159~0.185%；
Other controlled rollings, the cold parameter of control are executed by HPB300 rolling standard.
Comparative example 1
A kind of production method of HPB300 wire rod controls Si content >=0.197% in molten steel, the same embodiment of other steps
1。
Embodiment 1 and 1 resulting wire rod its performance of comparative example are as shown in table 1, in figure 5 it can be seen that in the Si content of embodiment 1
In range, gained wire rod does not occur red rust, has well solved red rust problem.In the Si content range of comparative example 1, wire rod is still
There is red rust (poker red rust or slight red rust), effect is undesirable.
Embodiment 2
A kind of production method reducing HPB300 wire rod surface red rust, comprising the following steps:
(1) desulfurization is carried out to molten iron before steel-making, controls sulfur content≤0.005wt%；
(2) conventional to carry out converter smelting, in tapping 1/3 to 2/3, FeMnSi and FeMn is added and carries out deoxidation, and controls
Si content in molten steel is 0.159~0.185%；
(3) electric furnace refining is carried out, refining time is not less than 30 minutes；Then continuous casting is carried out, obtains square billet, then removed
Squama；
(4) it after pair rolling, is water-cooled, after reversed air purging, batches；
In step (4), the pressure of reversed air purging is controlled in 0.6MPa.
Comparative example 2
A kind of production method of HPB300 wire rod, in step (4), the pressure of reversed air purging is 0.4MPa or rope
Property close reversed air purging, other steps are the same as embodiment 2.
The results are shown in Table 2:
Table 2: the manufacturing parameter and generation red rust situation of 2 wire rod of embodiment 2 and comparative example
| Specification (mm) | Air purging pressure/MPa | Recover section | Laying temperature DEG C | Surface condition |
| 6.5 | 0.4 | Surface is slightly with water | 930±5 | It gets rusty phenomenon |
| 6.5 | 0.6 | Surface is without water | 930±5 | Slightly get rusty |
| 6.5 | It closes | Surface band water is serious | 930±5 | It gets rusty serious |
| 8 | 0.4 | Surface is slightly with water | 930±5 | Slightly get rusty |
| 8 | 0.6 | Surface is without water | 930±5 | Slightly get rusty |
| 8 | It closes | Surface band water is serious | 930±5 | It gets rusty serious |
As can be seen from Table 2, if closing reversed air purging, the wire rod of two kinds of specifications all gets rusty seriously.Reversed air
When purging pressure is 0.4MPa, the wire rod some of two kinds of specifications is got rusty obvious (6.5mm), and some slightly gets rusty (8mm), also can not
It takes.When reversed air purging pressure is 0.6MPa, the wire rod of two kinds of specifications all only slightly gets rusty.As it can be seen that controlling reversed air
Purging pressure is 0.6MPa, and the formation of red rust can be effectively reduced.
Embodiment 3
A kind of production method reducing HPB300 wire rod surface red rust, comprising the following steps:
(1) desulfurization is carried out to molten iron before steel-making, controls sulfur content≤0.005wt%；
(2) conventional to carry out converter smelting, in tapping 1/3 to 2/3, FeMnSi and FeMn is added and carries out deoxidation, and controls
Si content in molten steel is 0.159~0.185%；
(3) electric furnace refining is carried out, refining time is not less than 30 minutes；Then continuous casting is carried out, obtains square billet, then removed
Squama；
(4) it after pair rolling, is water-cooled, after reversed air purges (0.6MPa), batches；
In step (4), the pH value of cooling water is 7.0-8.0, and conductivity is less than 800us/cm.
Comparative example 3
A kind of production method reducing HPB300 wire rod surface red rust, in step (4), the pH value of cooling water is 7.0-8.0,
Conductivity is more than 800us/cm, other steps are the same as embodiment 3.
The physical and chemical parameter of cooling water used in embodiment 3 and comparative example 3 and the red rust situation of gained wire rod are shown in Table 3.It can by table 3
To find out, under identical technological parameter, when cooling water conductivity is less than 800us/cm, gained wire rod does not occur red rust；On the contrary,
When cooling water conductivity is more than 800us/cm, red rust is serious.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of production method for reducing Surfaces of Hot Rolled Strip red rust, it is characterised in that the following steps are included:
(1) desulfurization is carried out to molten iron before steel-making, controls sulfur content≤0.005wt%；
(2) conventional to carry out converter smelting, in tapping 1/3 to 2/3, FeMnSi and FeMn is added and carries out deoxidation, and controls molten steel
In Si content be 0.159~0.185%；
(3) electric furnace refining is carried out, refining time is not less than 30 minutes；Then continuous casting is carried out, obtains square billet, then carry out de-scaling；
(4) it after pair rolling, is water-cooled, after reversed air purging, batches.
2. production method according to claim 1, it is characterised in that: step is water-cooled described in (4), cooling water electricity
Conductance is in 800us/cm or less.
3. production method according to claim 2, it is characterised in that: the pH value of the cooling water is 7.0-8.0.
4. production method according to claim 1, it is characterised in that: reversed air purging, purging described in step (4)
Pressure is controlled in 0.6MPa.
5. production method according to claim 1, it is characterised in that: the desulfurizing agent that step (1) uses is lime and fluorite.
6. production method according to claim 5, it is characterised in that: the lime adds according to 5.4-9.0kg/ tons of molten iron
Enter, fluorite is added according to 0.6-1.0kg/ tons of molten iron.
7. production method according to claim 1, it is characterised in that: in step (1), molten iron temperature is controlled in 1220-
1350℃。
8. production method according to claim 1, it is characterised in that: in step (2), tapping temperature is controlled in 1620-
1645℃。
9. production method according to claim 1, it is characterised in that: in step (2), the FeMnSi is according to 5-8kg/
Ton steel is added, and FeMn is added according to 5-8kg/ tons of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433412.9A CN109355453A (en) | 2018-11-28 | 2018-11-28 | A kind of production method reducing gren rod surface red rust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433412.9A CN109355453A (en) | 2018-11-28 | 2018-11-28 | A kind of production method reducing gren rod surface red rust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109355453A true CN109355453A (en) | 2019-02-19 |
Family
ID=65343388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811433412.9A Pending CN109355453A (en) | 2018-11-28 | 2018-11-28 | A kind of production method reducing gren rod surface red rust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109355453A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774801A (en) * | 2022-05-28 | 2022-07-22 | 阳春新钢铁有限责任公司 | Production method of high-elongation bundled wire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102756002A (en) * | 2011-04-28 | 2012-10-31 | 宝山钢铁股份有限公司 | Method for continuous jet descaling |
| CN203170737U (en) * | 2013-03-26 | 2013-09-04 | 鞍钢股份有限公司 | Steel plate surface cooling water purging device |
| CN104962673A (en) * | 2015-06-26 | 2015-10-07 | 武汉钢铁(集团)公司 | Production method capable of preventing 65 Mn spring strip steel surface from red rust |
| CN108526227A (en) * | 2018-03-15 | 2018-09-14 | 包头钢铁（集团）有限责任公司 | The control method of sweep module and sweep module |
| CN208083074U (en) * | 2018-04-10 | 2018-11-13 | 江苏江南精密金属材料有限公司 | A kind of milling train removal emulsion residue device |
-
2018
- 2018-11-28 CN CN201811433412.9A patent/CN109355453A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102756002A (en) * | 2011-04-28 | 2012-10-31 | 宝山钢铁股份有限公司 | Method for continuous jet descaling |
| CN203170737U (en) * | 2013-03-26 | 2013-09-04 | 鞍钢股份有限公司 | Steel plate surface cooling water purging device |
| CN104962673A (en) * | 2015-06-26 | 2015-10-07 | 武汉钢铁(集团)公司 | Production method capable of preventing 65 Mn spring strip steel surface from red rust |
| CN108526227A (en) * | 2018-03-15 | 2018-09-14 | 包头钢铁（集团）有限责任公司 | The control method of sweep module and sweep module |
| CN208083074U (en) * | 2018-04-10 | 2018-11-13 | 江苏江南精密金属材料有限公司 | A kind of milling train removal emulsion residue device |
Non-Patent Citations (1)
| Title |
|---|
| 金明柏: "《水处理系统设计实务》", 31 March 2010, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114774801A (en) * | 2022-05-28 | 2022-07-22 | 阳春新钢铁有限责任公司 | Production method of high-elongation bundled wire |
| CN114774801B (en) * | 2022-05-28 | 2023-04-18 | 阳春新钢铁有限责任公司 | Production method of bundling wire with high elongation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104046914B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN104032214B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN105200215B (en) | A kind of 50 100mm microalloy Heavy plate production methods | |
| CN101412183B (en) | Method for producing high-carbon chromium bearing steel by double retarded cooling process | |
| CN107312970B (en) | A kind of high-strength steel for fastener of super large and production method | |
| CN104032226B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN110616381A (en) | Austenite grain size refinement control method of high-temperature carburized gear steel | |
| CN106811700B (en) | A kind of think gauge acid-resisting X60MS hot-rolled coils and its manufacture method | |
| CN103060679A (en) | Q345-serie super-thick steel plate having low cost and guaranteeing performances and flaw detection, and production technology thereof | |
| CN102925806B (en) | Y55 mark free-cutting steel plate and manufacture method thereof | |
| CN104438326B (en) | Rolling technology for high-carbon steel in thin slab casting and rolling | |
| CN101219434A (en) | Method for producing steel for automobile wheel based on bar strip continuous casting and rolling flow path | |
| CN104032224B (en) | A kind of non-hardened and tempered steel and production technique thereof | |
| CN102825236A (en) | Method for removing transverse crack defects of continuous casting billet corner of boron steel | |
| CN105779881A (en) | Production method of high-carbon spring steel strip | |
| CN105274429A (en) | Production method for alloy filament | |
| CN103725964A (en) | Novel low alloy steel Q345 series extra-thick steel plate and production method thereof | |
| CN105132616B (en) | Method for preventing surface of flange steel from cracking | |
| CN103710620A (en) | Large-thickness steel plate for low-temperature pressure container and production process thereof | |
| CN109518079A (en) | A kind of production method of hydrogen-contacting equipment 15CrMoR steel plate | |
| CN106222559B (en) | A kind of offshore platform steel steel plate and its production method | |
| CN110184533A (en) | A kind of low silicon universal-joint Rzeppa steel and manufacturing method | |
| CN105274428A (en) | Production method for alloy filament with zero defect on surface | |
| CN105200267A (en) | Pure nickel N6 for lithium battery rivets and production method thereof | |
| CN109355453A (en) | A kind of production method reducing gren rod surface red rust |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190219 |