CN109530429A - A kind of rolling mill practice of steady production martensite air-valve steel rolling base - Google Patents
A kind of rolling mill practice of steady production martensite air-valve steel rolling base Download PDFInfo
- Publication number
- CN109530429A CN109530429A CN201811350695.0A CN201811350695A CN109530429A CN 109530429 A CN109530429 A CN 109530429A CN 201811350695 A CN201811350695 A CN 201811350695A CN 109530429 A CN109530429 A CN 109530429A
- Authority
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- China
- Prior art keywords
- rolling
- cooling water
- steel
- roll
- martensite
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 238000009749 continuous casting Methods 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 8
- 238000003801 milling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000011533 pre-incubation Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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
- B21B1/04—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 in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B27/106—Heating the rolls
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The present invention relates to a kind of rolling mill practice of steady production martensite air-valve steel rolling base, processing step is that the side's 320*425/280*280 continuous casting billet → stepped heating stove heating → blooming mill → 1# hydraulic shear is cut off, back-end crop → 160F Continuous mill train → 2# hydraulic shear is cut off, is segmented → trolley furnace annealing；Martensite air-valve steel rolling base face checking and production efficiency can be solved the problems, such as very well.
Description
Technical field
The invention belongs to steel rolling Controlled Rolling And Controlled Cooling fields, are related to a kind of rolling for steady production martensite air-valve steel rolling base
Technique processed.
Background technique
Martensite Valve Steel is the one kind that can not ignore in current special steel kind, is Diesel Engine's Air Valve common used material, 900 DEG C
Following non-scale, 600 DEG C ~ 700 DEG C have good anti-oxidant and elevated temperature strength, in middle-size and small-size diesel engine, truck
It is used widely in exhaust valve part, it plays vital effect in the manufacture and development of automobile.Martensite gas
Valve steel category high-alloy steel, the operation of rolling are to ensure product quality, cooling water should be avoided to contact with steel surface as far as possible.Rolling is horse
A required link in family name's body Valve Steel production process, rolling quality directly influence the comprehensive performance of finished steel.Currently
Martensite air-valve steel rolling base rolling mill practice mainly using traditional rolled blank rolling mill practice production, traditional rolling mill practice is more
Extensive, in the operation of rolling, high-pressure water descaling, roll are cooling etc. can all cause steel to contact with water and the naturally cold side of rolled blank
Formula etc. causes product surface to crack, and therefore, current tradition rolling mill practice is unable to satisfy the demand of Valve Steel fining rolling,
The cooling controlling and rolling controlling process for seeking a kind of suitable martensite Valve Steel is imperative.
Conventional process flow:
The side's 320*425/280*280 continuous casting billet → stepped heating stove heating → high-pressure water descaling → blooming mill (pair rolling work
Skill, roll cooling water are in normally open) (roll cooling water is in normally opened to → 1# hydraulic shear (cutting head, back-end crop) → Continuous mill train
State) → 2# hydraulic shear (cutting head, segmentation) → cold bed (natural cooling).
Summary of the invention
In order to overcome the disadvantages mentioned above of the prior art, the present invention provides a kind of steady production martensite air-valve steel rolling base
Rolling mill practice can solve the problems, such as martensite air-valve steel rolling base face checking and production efficiency very well.
The technical solution adopted by the present invention to solve the technical problems is: a kind of steady production martensite air-valve steel rolling base
Rolling mill practice, processing step is the side's 320*425/280*280 continuous casting billet → stepped heating stove heating → blooming mill → 1#
Hydraulic shear is cut off, back-end crop → 160F Continuous mill train → 2# hydraulic shear is cut off, is segmented → trolley furnace annealing；Specific steps
It is:
Step 1: stock bank checks the side's 320*425/280*280 continuous casting billet, it is ensured that blank surface quality meets presentation quality and wants
It asks；
Step 2: steel billet is put into heating stove heating, heating temperature, time reach tapping when technique requires；
Step 3: closing high pressure water dephosphorization, martensite Valve Steel steel billet not dephosphorization；
Step 4: first being slotted using other steel billets before blooming mill rolling；When rolling, using slighter compress rolling mill practice, roll is closed
And roller-way cooling water；After every steel rolls, air-cooled roll 2 minutes or so, then open roll cooling water 2 minutes or so (cooling water flows
Amount is controlled by 35%, and about 62 cubes ms/h), it is then shut off roll cooling water and crosses steel；
Step 5: the cutting head of 1# hydraulic shear and back-end crop, tandem rolling preincubation cover are closed；
Step 6: milling train cooling water carries out adjustment in advance, under the premise of guaranteeing that roll is cooling, roll cooling water is adjusted as far as possible
It is small, cooling water is closed after mixing up, before rolled piece does not bite milling train, which is in close state, and is bitten to rolled piece
After milling train, program automatically turns on the roll cooling water of the rack；After the completion of rolling, roll cooling water is closed；
Step 7: hot saw is using the cutting head of 2# hydraulic shear, segmentation and sampling, not back-end crop；
Step 8: rolled blank is quickly entered furnace stress relief annealing after finishing receives rolled blank.
The positive effect of the present invention is: slotting and can effectively be preheated to roll before rolling Valve Steel, when cogging closes
Roll cooling water, high pressure dephosphorization water and control tandem rolling cooling water can utmostly avoid steel contacts, will quickly roll after rolling
Base enters furnace stress relief annealing, can effectively eliminate rolled blank internal residual stress, is ensureing that martensite Valve Steel is every physical and chemical
Under the premise of performance, technique very good solution martensite air-valve steel rolling base face checking problem.
Specific embodiment
Below with reference to embodiment, the present invention is further described.
The embodiment of the present invention specifically comprises the following steps: so that 9 martensite Valve Steels roll rear surface quality as an example
Step 1: selecting 9 martensite air valve steel continuous casting billets, 3 45 steel continuous casting billets, section 320mm × 425mm, it is ensured that blank
Surface meets appearance requirement；
It is sequentially loaded into heating furnace before 9 Valve Steels step 2: 3 45 steel are come, by heating process standard normal heating；
Step 3: first rolling 3 45 steel by traditional rolling mill practice after the completion of heating, martensite air valve is rolled as blooming mill
Fluting before steel prepares；
Step 4: stokehold dephosphorization apparatus is closed, martensite Valve Steel not dephosphorization；
Step 5: blooming mill changes slighter compress rolling mill practice, roll cooling water is closed when rolling Valve Steel, rolls latter air-cooled 2 points
Clock goes out next again；
Step 6: the cutting head of 1# hydraulic shear and back-end crop, tandem rolling preincubation cover are closed；
Step 7: steel billet bites K4(tandem rolling First milling train) afterwards program automatic water similarly bite K3, K2, K1(tandem rolling most
Latter milling train) program automatic water afterwards, while roll cooling water is turned down as far as possible.The program when steel billet is detached from K4, K3, K2, K1
Cooling water is automatically closed；
Step 8: the segmentation of 2# hydraulic shear enters rapidly car type furnace stress relief annealing by cold bed after the completion of rolled blank rolling.It presses
9 martensite Valve Steels are rolled according to the step；
Step 9: taking rolled blank sample to make physical and chemical performance analysis after rolled blank stress relief annealing；
After annealing is come out of the stove, the surface quality of this 9 martensite Valve Steels is intact, and cracking phenomena, every physicochemical property report is not present
It is qualified to accuse.The rolling mill practice can be effectively applied to the production of martensite air-valve steel rolling base, make the surface matter of martensite Valve Steel
Amount meets product quality requirement, realizes the Precise control to martensite air-valve steel rolling technique, reaches and effectively solves martensite
The problem of air-valve steel rolling base face checking, improves the rolling quality and production efficiency of martensite Valve Steel to greatest extent.It adopts
With this rolling mill practice, martensite air-valve steel rolling base surface did not occurred the phenomenon that cracking, and the present invention has good practicability,
It has successfully ensured the steady production of martensite air-valve steel rolling base, there is biggish economic benefit, it can be in similar producing line
Expanded application.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, all within principle of the invention, institute
It changes, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of rolling mill practice of steady production martensite air-valve steel rolling base, processing step is the side 320*425/280*280
Continuous casting billet → stepped heating stove heating → blooming mill → 1# hydraulic shear is cut off, back-end crop → 160F Continuous mill train → 2# is hydraulic
It cuts and is cut off, is segmented → trolley furnace annealing；It is characterized by: comprising the concrete steps that:
Step 1: stock bank checks the side's 320*425/280*280 continuous casting billet, it is ensured that blank surface quality meets presentation quality and wants
It asks；
Step 2: steel billet is put into heating stove heating, heating temperature, time reach tapping when technique requires；
Step 3: closing high pressure water dephosphorization, martensite Valve Steel steel billet not dephosphorization；
Step 4: first being slotted using other steel billets before blooming mill rolling；When rolling, using slighter compress rolling mill practice, roll is closed
And roller-way cooling water；After every steel rolls, air-cooled roll 2 minutes or so, then open roll cooling water 2 minutes or so (cooling water flows
Amount is controlled by 35%, and about 62 cubes ms/h), it is then shut off roll cooling water and crosses steel；
Step 5: the cutting head of 1# hydraulic shear and back-end crop, tandem rolling preincubation cover are closed；
Step 6: milling train cooling water carries out adjustment in advance, under the premise of guaranteeing that roll is cooling, roll cooling water is adjusted as far as possible
It is small, cooling water is closed after mixing up, before rolled piece does not bite milling train, which is in close state, and is bitten to rolled piece
After milling train, program automatically turns on the roll cooling water of the rack；After the completion of rolling, roll cooling water is closed；
Step 7: hot saw is using the cutting head of 2# hydraulic shear, segmentation and sampling, not back-end crop；
Step 8: rolled blank is quickly entered furnace stress relief annealing after finishing receives rolled blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811350695.0A CN109530429B (en) | 2018-11-14 | 2018-11-14 | Rolling process for stably producing martensite air valve steel rolled blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811350695.0A CN109530429B (en) | 2018-11-14 | 2018-11-14 | Rolling process for stably producing martensite air valve steel rolled blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109530429A true CN109530429A (en) | 2019-03-29 |
| CN109530429B CN109530429B (en) | 2020-07-28 |
Family
ID=65847037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811350695.0A Active CN109530429B (en) | 2018-11-14 | 2018-11-14 | Rolling process for stably producing martensite air valve steel rolled blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109530429B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676421A (en) * | 2020-05-20 | 2020-09-18 | 樟树市兴隆高新材料有限公司 | Rolling method of martensite air valve steel rolled blank |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0381002A (en) * | 1989-08-22 | 1991-04-05 | Toshiba Corp | Method and device for estimating dog bone height of rolled stock |
| CN1483523A (en) * | 2003-07-29 | 2004-03-24 | 宝钢集团上海五钢有限公司 | Productive method for cr 12 Mov rolling cogging |
| CN101069894A (en) * | 2007-04-04 | 2007-11-14 | 江苏申源特钢有限公司 | Method for producing cogging by air-valve steel rolling |
| CN102836870A (en) * | 2011-06-23 | 2012-12-26 | 宝山钢铁股份有限公司 | Rolling and cogging production method for large austenite stainless and heat-resistant gas valve steel 21-4N ingot |
| CN108220750A (en) * | 2018-01-15 | 2018-06-29 | 江苏申源特钢有限公司 | A kind of production method of the bright as silver bars of high carbon martensite Valve Steel 85Cr18Mo2V |
-
2018
- 2018-11-14 CN CN201811350695.0A patent/CN109530429B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0381002A (en) * | 1989-08-22 | 1991-04-05 | Toshiba Corp | Method and device for estimating dog bone height of rolled stock |
| CN1483523A (en) * | 2003-07-29 | 2004-03-24 | 宝钢集团上海五钢有限公司 | Productive method for cr 12 Mov rolling cogging |
| CN101069894A (en) * | 2007-04-04 | 2007-11-14 | 江苏申源特钢有限公司 | Method for producing cogging by air-valve steel rolling |
| CN102836870A (en) * | 2011-06-23 | 2012-12-26 | 宝山钢铁股份有限公司 | Rolling and cogging production method for large austenite stainless and heat-resistant gas valve steel 21-4N ingot |
| CN108220750A (en) * | 2018-01-15 | 2018-06-29 | 江苏申源特钢有限公司 | A kind of production method of the bright as silver bars of high carbon martensite Valve Steel 85Cr18Mo2V |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676421A (en) * | 2020-05-20 | 2020-09-18 | 樟树市兴隆高新材料有限公司 | Rolling method of martensite air valve steel rolled blank |
| CN111676421B (en) * | 2020-05-20 | 2021-09-28 | 樟树市兴隆高新材料有限公司 | Rolling method of martensite air valve steel rolled blank |
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| Publication number | Publication date |
|---|---|
| CN109530429B (en) | 2020-07-28 |
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Address after: 512123 special bar plant, MABA Town, Qujiang District, Shaoguan City, Guangdong Province Patentee after: Baowu jiefuyi Special Steel Co.,Ltd. Address before: 512123 special bar plant, MABA Town, Qujiang District, Shaoguan City, Guangdong Province Patentee before: BAOSTEEL SPECIAL STEEL SHAOGUAN Co.,Ltd. |