CN109894591A - A kind of vertical continuous casting technique of high speed steel M2 - Google Patents
A kind of vertical continuous casting technique of high speed steel M2 Download PDFInfo
- Publication number
- CN109894591A CN109894591A CN201910126146.3A CN201910126146A CN109894591A CN 109894591 A CN109894591 A CN 109894591A CN 201910126146 A CN201910126146 A CN 201910126146A CN 109894591 A CN109894591 A CN 109894591A
- Authority
- CN
- China
- Prior art keywords
- continuous casting
- speed steel
- casting
- steel
- high speed
- 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.)
- Withdrawn
Links
Landscapes
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of vertical continuous casting technique of high speed steel M2, in the continuous casting process, casting degree of superheat control is at 20~40 DEG C；Ladle-lining temperature is at 1150 DEG C or more in continuous casting；Crystallizer is continuous taper, and taper is 0.55~0.60；Using submersed nozzle protective casting；0.5~1.5m/min of drawing speed, crystallizer vibration amplitude are controlled in 3~6mm, and frequency is matched with pulling rate；Electromagnetic agitation is carried out to molten steel in continuous casting process；Secondary cooling is automatically controlled using weak cold.This technique provides a kind of method of continuous casting high-speed steel, using measures such as electromagnetic agitation, molding castings, significantly improves ingot casting production efficiency; slab quality is good, and macrostructure is fine and close, improves the lumber recovery of ingot casting; production cost is reduced, high-speed steel molding production can be substituted with continuous casting.
Description
Technical field
The invention belongs to metallurgical technology fields, relate generally to a kind of vertical continuous casting technique of high speed steel M2.
Background technique
High-speed steel has good machinability and comprehensive performance, it still remains ahead ground in tool materials field
Position, being increasing for continuous development and international demand recently as technology, promotes high-speed steel to enter the development of Comprehensive
And more careful in-depth study is carried out in certain fields.The development of China's high-speed steel is compared with the whole world at this stage, at yield
In leading position, but quality level gap is still larger.
Currently, using die casting process in domestic high speed steel M2 smelting, which includes steel-making, molding and electroslag remelting, is somebody's turn to do
Process there are high production cost, slab quality is unstable, large labor intensity and energy consumption are larger the problems such as.It is raw with continuous casting process
Produce the development trend that high-speed steel is H.S.S. production technical field.It is mainly had the following advantages with continuous casting technology production high-speed steel:
(1) the opposite molding of continuous casting can significantly improve the recovery rate of molten steel, and the recovery rate of continuous casting can achieve 96% or more, molding
The superiority such as energy consumption is reduced, improves working conditions hereinafter, having 80%.
(2) 15% or more lumber recovery can be improved for small profile with continuous casting billet production high-speed steel.
(3) it is likely to be breached the level of Electro Slag Remelting Steel using the part slab of vertical casting machine production, is directly forged after continuous casting
It makes, saves electroslag remelting process.If instead of Electro Slag Remelting Steel, 1600 yuan/t of saving electroslag melting cost per ton, overall economic benefit
It is considerable.
High-speed steel is high-carbon high-alloy ledeburite steel, since it is tight with air-cooled self-hardening property height, poor ductility, microstructure segregation
The problems such as weight, it is acknowledged as the difficult steel grade of continuous casting for a long time.Mould steel continuous casting technology industrialized production at home
Substantially blank is still belonged to.
The continuous casting for realizing mould steel is the inexorable trend of future economy type and the development of common mould steel.Mould steel connects
Casting is a technology sexual revolution to the production technology in entire mould steel field, to the production skill for pushing China's high-carbon high-alloy steel
Art progress has great scientific meaning.
Summary of the invention
A kind of vertical continuous casting technique for the high speed steel M2 that the object of the present invention is to provide slab performances is good, quality is stable.
In order to solve the above technical problems, the technical solution used in the present invention is: in the continuous casting process, the degree of superheat of casting
Control is at 20~40 DEG C；Lining temperature is at 1150 DEG C or more after packet toasts in continuous casting；Crystallizer is continuous taper, and taper is
0.55~0.60；Using submersed nozzle protective casting；0.5~1.5m/min of drawing speed, crystallizer vibration amplitude control 3~
6mm, frequency are matched with pulling rate；Electromagnetic agitation is carried out to molten steel in continuous casting process；Secondary cooling is automatically controlled using weak cold.
Centering packet is toasted before casting of the present invention, is baked to middle ladle-lining temperature at 1150 DEG C or more.
1~6Hz of stirring frequency of electromagnetic agitation of the present invention, 100~300A of stir current.
Crystallizer used in the present invention use non-sinusoidal oscillation, using formula (I) match control model adjustment vibration frequency with
Pulling rate variation；Using fixed amplitude, amplitude controlling is in 3~6mm；
F=av+b (I)
In formula: f- vibration frequency, Hz；
A- coefficient, 100；
V- drawing speed, m/min；
B- coefficient, 50.
The beneficial effects of adopting the technical scheme are that the present invention produces high-speed steel, knot using continuous cast method
The brilliant continuous taper of device is automatically controlled 0.55~0.60 using mold oscillation, built-in electromagnetic stirring, molding casting, secondary cooling zone
The methods of, significantly improve ingot casting production efficiency；Gained slab quality of the invention is good, and macrostructure is fine and close；The present invention improves
The lumber recovery of high-speed steel, reduces production cost, can substitute the continuous casting that molding carries out high-speed steel.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the macrostructure figure of 1 gained continuous casting billet of embodiment；
Fig. 2 is the macrostructure figure of 2 gained continuous casting billet of embodiment；
Fig. 3 is the macrostructure figure of 3 gained continuous casting billet of embodiment；
Fig. 4 is the macrostructure figure of 4 gained continuous casting billet of embodiment；
Fig. 5 is the macrostructure figure of 5 gained continuous casting billet of embodiment；
Fig. 6 is the macrostructure figure of 6 gained continuous casting billet of embodiment.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
The vertical continuous casting technique of this high speed steel M2 is as described below:
(1) chemical component of used molten steel, by weight percentage: C=0.80%~0.90%, Si=0.20%~0.45%, Mn=
0.15%~0.40%, P≤0.03%, S≤0.03%, W=5.50%~6.75%, Mo=4.50%~5.50%, Cr=3.80%~
4.40%, V=1.75%~2.20%, remaining is Fe and inevitable impurity.The continuous casting degree of superheat controls between 20~40 DEG C.
(2) the first steel-making water of ingredient qualification is smelted in the multi-functional induction furnace of 1t, molten steel tapping temperature is 1555 ± 5 DEG C.
(3) centering packet is toasted before continuous casting；It is toasted using acetylene torch centering packet, baking time 5h or more,
Baking process are as follows: the length of flame 200~300mm small fire 1~1.5h of baking time, the length of flame 400~500mm moderate heat baking 2
1.5~2h is toasted in~3h, the length of flame 800~900mm high fire；Must assure that baking after middle ladle-lining temperature at 1150 DEG C and with
On.Molten steel is added in continuous casting after packet, and packet is directly contacted with high-temperature molten steel in continuous casting, and middle packet is using temperature 1470 ± 10 at this time
℃。
(4) molten steel is poured into continuous casting and is wrapped, and covering agent in 20~30kg is added to molten steel and is protected, it then will even
Packet is hung with overhead traveling crane in continuous casting platform in casting.Baked continuous casting collector nozzle is placed at the filling pipe end of the lower part continuous casting Zhong Bao, is beaten
Middle packet stopper is opened, molten steel is flowed into crystallizer by submersed nozzle, and continuous casting knot is added at 20~40 DEG C in casting degree of superheat control
Brilliant device covering slag, enhancing slab and crystallizer inner wall lubricant effect, quickly solidification forms green shell to molten steel in water mold.
Blank drawing machine draws steel billet with 0.5~1.5m/min speed.Mold oscillation is opened, crystallizer is non-sinusoidal oscillation, knot
The brilliant device rise time is long and speed is gentle, reduces the tensile stress that initial solidification shell is born, and reduces depth of chatter mark, improves casting billet surface
Quality；Using fixed amplitude, amplitude controlling becomes in 3~6mm, using f=av+b match control model adjustment vibration frequency with pulling rate
Change, realizes the match control of mold oscillation；Wherein, f is vibration frequency, Hz；A is coefficient, value 100；V is drawing speed,
m/min；B is coefficient, value 50.
Electromagnetic agitation is carried out to molten steel by built-in electromagnetic stirrer；135 × 135mm square blank crystallizer stirring intensity is
100~200A, frequency are 1~5Hz；180 × 180mm square blank crystallizer stirring intensity is 200~300A, frequency is 3~6Hz.
Crystallizer total length is 750mm, effective length 650mm, and crystallizer is continuous taper, taper design 0.55~
0.60.Electromagnetic agitation is installed in crystallizer simultaneously, secondary cooling zone mesopodium roll segment length is 0.2m, and two cold one section of length are
1.8m, two cold two sections of length are 1.7m.Crystallizer water flow is controlled in 110~120t/h.Secondary cooling is automatic using weak cold
Control, aerosol water-spraying control mode, specific water control in 0.16~0.21L/kg；Secondary cooling zone water is positively correlated with pulling rate,
Relationship is shown in formula (II)；
Q=av2+ bv+c (II)
In formula: Q is amount of water sprayed, L min-1；V is drawing speed, m min-1；A, b and c be constant, and different secondary cooling zones its
Value is different；The value of secondary cooling zone each section of a, b and c are respectively as follows: sufficient roll segment: a0=0、b0=10、c0=3, i.e. Q=10v+3；Two cold one
Section: a1=0、b1=30、c1=5, i.e. Q=30v+5；Two cold two sections: a2=1.5、b2=10、c2=4, i.e. Q=1.5v2+10v+4。
(5) slab of the continuous casting is 135 × 135mm~180 × 180mm square billet, and slab, which goes out after secondary cooling zone to be placed on, to move back
It is made annealing treatment in stove, for reducing hardness, reduces deformation and crackle tendency, eliminate tissue defects.
Embodiment 1-6: the vertical continuous casting technique of this high speed steel M2 is described in detail below.
(1) chemical component: the chemical component and its weight percentage of molten steel used by each embodiment are shown in Table 1.
Table 1: the chemical component and its content of molten steel
In table 1, surplus is Fe and inevitable impurity.
(2) technical process: according to above-mentioned technique, carrying out continuous casting using vertical casting machine, the square billet of embodiment 1-3 having a size of
135mm × 135mm, the square billet of embodiment 4-6 is having a size of 180 × 180mm；Each specific technological parameter of embodiment is shown in Table 2.
Table 2: each specific technological parameter of embodiment
(3) macrostructure analysis continuous casting effect: is carried out to the M2 steel continuous casting billet cross section that section is 135mm × 135mm.Analysis hair
Existing: as shown in Figure 1,1 continuous casting billet of embodiment is in edge, there are a small amount of macroscopic crackings and micro center porosity；As shown in Fig. 2, implementing
There are certain central pipes for 2 continuous casting billet of example, without surface and underbead crack；As shown in figure 3,3 continuous casting billet central pipe of embodiment
It eliminates, without face crack.
Macrostructure analysis is carried out to the M2 steel continuous casting billet longitudinal section that section is 180mm × 180mm.As shown in figure 4, implementing
There are certain central pipes for 4 continuous casting billet of example；As shown in figure 5, there are the certain crackles of edge for 5 continuous casting billet of embodiment, slab is without in
Heart shrinkage cavity；As shown in fig. 6,6 continuous casting billet of embodiment does not have a underbead crack, center porosity be improved significantly.
(4) the result shows that: this technique can satisfy high speed steel M2 continuous casting process technical requirements, controls the suitable degree of superheat, applies
The measures such as electromagnetic agitation are added to can effectively improve slab central pipe and center segregation；M2 steel can be effectively reduced using annealing cooling to connect
The generation of slab crackle.By controlling reasonable process parameter area, high speed steel M2 surface quality of continuously cast slab is good, and macroscopic cracking can
To eliminate, oscillation mark is evenly distributed and shallower, and slab quality can achieve equivalent specifications molding quality requirement, and fully meet electroslag
Base material quality requirement.
This continuous casting process production high speed steel M2 continuous casting billet can substitute die casting process production molding base, continuous casting process compared with
Die casting process can significantly reduce energy consumption, reduces production cost and improve production efficiency.
Claims (4)
1. a kind of vertical continuous casting technique of high speed steel M2, it is characterised in that: in the continuous casting process, casting degree of superheat control is 20
~40 DEG C；Ladle-lining temperature is at 1150 DEG C or more in continuous casting；Crystallizer is continuous taper, and taper is 0.55~0.60；Using
Submersed nozzle protective casting；0.5~1.5m/min of drawing speed, crystallizer vibration amplitude control is in 3~6mm, frequency and pulling rate
Match；Electromagnetic agitation is carried out to molten steel in continuous casting process；Secondary cooling is automatically controlled using weak cold.
2. a kind of vertical continuous casting technique of high speed steel M2 according to claim 1, it is characterised in that: centering before the casting
Packet is toasted, and is baked to middle ladle-lining temperature at 1150 DEG C or more.
3. a kind of vertical continuous casting technique of high speed steel M2 according to claim 1, it is characterised in that: the electromagnetic agitation
1~6Hz of stirring frequency, 100~300A of stir current.
4. a kind of vertical continuous casting technique of high speed steel M2 according to claim 1 to 3, it is characterised in that: institute
Non-sinusoidal oscillation is used with crystallizer, is changed using formula (I) match control model adjustment vibration frequency with pulling rate；Using fixation
Amplitude, amplitude controlling is in 3~6mm；
F=av+b (I)
In formula: f- vibration frequency, Hz；
A- coefficient, 100；
V- drawing speed, m/min；
B- coefficient, 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126146.3A CN109894591A (en) | 2019-02-20 | 2019-02-20 | A kind of vertical continuous casting technique of high speed steel M2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910126146.3A CN109894591A (en) | 2019-02-20 | 2019-02-20 | A kind of vertical continuous casting technique of high speed steel M2 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109894591A true CN109894591A (en) | 2019-06-18 |
Family
ID=66945059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910126146.3A Withdrawn CN109894591A (en) | 2019-02-20 | 2019-02-20 | A kind of vertical continuous casting technique of high speed steel M2 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109894591A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918392A (en) * | 2022-04-29 | 2022-08-19 | 重庆钢铁股份有限公司 | Vibration control method for square billet continuous casting crystallizer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303108A (en) * | 2011-09-22 | 2012-01-04 | 首钢贵阳特殊钢有限责任公司 | Continuous casting production process for improving quality of free cutting steel casting blank |
| CN103146995A (en) * | 2013-03-08 | 2013-06-12 | 首钢贵阳特殊钢有限责任公司 | High manganese steel continuous casting production technique |
-
2019
- 2019-02-20 CN CN201910126146.3A patent/CN109894591A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303108A (en) * | 2011-09-22 | 2012-01-04 | 首钢贵阳特殊钢有限责任公司 | Continuous casting production process for improving quality of free cutting steel casting blank |
| CN103146995A (en) * | 2013-03-08 | 2013-06-12 | 首钢贵阳特殊钢有限责任公司 | High manganese steel continuous casting production technique |
Non-Patent Citations (4)
| Title |
|---|
| 李博斌: "连铸工艺对M2高速钢碳化物析出的影响", 《河北冶金》 * |
| 李宪奎，张德明: "《连铸结晶器振动技术》", 31 December 2000, 冶金工业出版社 * |
| 赵志刚 颜慧成等: "立式连鋳高速钢W6Mo4Cr4V2φ100mm坯的工艺试验", 《特殊钢》 * |
| 赵志刚: "高速工具钢（M2）连铸工艺基础研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918392A (en) * | 2022-04-29 | 2022-08-19 | 重庆钢铁股份有限公司 | Vibration control method for square billet continuous casting crystallizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9393613B2 (en) | Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting | |
| CN103184304B (en) | Technology for producing 38CrMoAl steel by converter-LF (low frequency)-RH (rockwell hardness)-continuous casting | |
| CN109112408B (en) | Manufacturing method of large-specification P92 heat-resistant steel forging | |
| CN105861951B (en) | Nickel and stainless steel super large-scale continuous casting billet manufacture method | |
| CN108034895A (en) | A kind of Valve Steel 50Cr21Mn9Ni4Nb2WN polishes the production method of bright as silver bar | |
| CN105803152B (en) | The center porosity control method of 30CrMo circular pipe blank steel strands | |
| WO2015043061A1 (en) | Non-quenched and tempered steel and manufacturing method therefor | |
| WO2015043060A1 (en) | Non-quenched and tempered steel and manufacturing method therefor | |
| CN203610629U (en) | Gas-protected crystallizer for horizontal continuous casting of copper tubes | |
| CN103667924B (en) | A kind of production method of 40Cr gren rod | |
| CN111590054B (en) | Device and method for preparing bimetal clad roller by ingot drawing type electroslag remelting method | |
| CN105945250A (en) | Method for improving internal quality of high-alloy steel billet | |
| CN109079114A (en) | A method of abrasion-resistant stee is produced using slab secondary cooling zone electromagnetic agitation | |
| CN103056624B (en) | Method for producing high-quality forged material by using large-scale vertical type continuous casting round billet, product and application thereof | |
| CN113385647A (en) | High-carbon high-manganese steel vertical bending type slab continuous casting method | |
| CN107150116A (en) | A kind of method that electromagnetism regulation and control manufacture large-sized casting ingot from inoculation | |
| CN105537549A (en) | Production method of continuous casting round billet of seamless steel tube steel at low temperature of minus 100 DEG C | |
| CN112605353A (en) | Ultra-large vertical continuous casting billet and production method thereof, and forging and production method thereof | |
| CN105772666B (en) | The center segregation control method of 30CrMo circular pipe blank steel strands | |
| CN101367121B (en) | Near-liquidus curve continuous casting method for electric steel | |
| CN100364678C (en) | Manufacturing method for roller-shell smelting and casting for aluminium-casted mill | |
| CN105624540A (en) | Control method of equiaxial crystal ratio of 30CrMo round pipe billet and steel casting blank | |
| CN109894591A (en) | A kind of vertical continuous casting technique of high speed steel M2 | |
| CN201304475Y (en) | Continuous casting device for producing round billet with diameter being more than or equal to Phi 800 mm on straight-form conticaster | |
| CN110125356A (en) | A kind of continuous small-billet casting production method of drilling tool cored steel |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190618 |
|
| WW01 | Invention patent application withdrawn after publication |