CN109097680A - High manganese high-alumina non-magnetic steel plate and its manufacturing method is made in a kind of 50t intermediate frequency furnace - Google Patents
High manganese high-alumina non-magnetic steel plate and its manufacturing method is made in a kind of 50t intermediate frequency furnace Download PDFInfo
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Abstract
The present invention discloses a kind of 50t intermediate frequency furnace and high manganese high-alumina non-magnetic steel plate and its manufacturing method is made, wherein, the component and weight percent content that high manganese high-alumina non-magnetic steel plate is made using the smelting of 50t intermediate frequency furnace includes: C:0.08~0.25%, Si:0.25~0.40%, Mn:15~20%, P≤0.020%, S≤0.010%, Al:2~4%, Nb:0.02~0.04%, V:0.015 ~ 0.030%, Ti:0.014 ~ 0.018%, Cu:0.012 ~ 0.016%, remaining is Fe and inevitable impurity；Yield strength Rp0.2 >=340MPa under steel plate room temperature provided by the invention, tensile strength Rm >=600MPa, elongation after fracture A is 45% ~ 50%, contraction percentage of area Z >=65%, the steel plate chemical component and microscopic structure are uniform, good mechanical performance, relative permeability is low, and internal stress is lower, and plate shape is good.
Description
Technical field
The present invention relates to nonmagnetic steel manufacturing technology field, in particular to a kind of 50t intermediate frequency furnace be made high manganese high alumina without
Magnetic steel plate and its manufacturing method.
Background technique
Nonmagnetic steel is a kind of nonmagnetic steel for not generating magnetic induction substantially under magnetic fields as a kind of steel functional material
Iron material, room temperature texture require to be stable austenite, and by service performance point, nonmagnetic steel can be divided into austenite magnetism-free stainless steel
With no magnetic structure steel, no magnetic structure steel mostly uses Fe-Mn system nonmagnetic steel, manganese content up to 17% or more, aluminium content up to 2% ~ 4%,
A large amount of manganese and aluminium need to be added in smelting process, and aluminum density is small, can swim in molten steel surface, it is difficult to fusing uniformly, cause temperature and at
Divide unevenness, finally influences properties of product.
In addition, be vacuum-treated when, since the vapour pressure of manganese is higher, volatile is formationed manganese steam, cause recovery rate lowly and
To human health, even there is the risk of explosion when serious, the aluminium that lighter weight is also resulted in molten steel flow floats, on
Floating aluminium will lead to aluminium loss after being in contact with steel slag, reduce Al yield.
Disclose that " a kind of vacuum induction furnace smelting controls manganese containing manganese steel application No. is 201010557779.9 Chinese patent
The method of content " provides a kind of control manganese using scrap smelting and the high vacuum induction furnace smelting molten steel of manganese recovery ratio and contains
To high operation requirements, calculating is relative complex for the method for amount, this method advantage of lower cost, but vaccum sensitive stove, if operation or meter
Existing error is calculated, the rate of recovery of manganese element can be made to have a greatly reduced quality.
Disclose that " 1000MPa grade high-strength high-ductility is containing manganese in aluminium application No. is 201410763193.6 Chinese patent
Steel and manufacturing method ", mentioning alloying of manganese is preferably 4:1 in converter smelting and the allocation proportion of external refining, solves conjunction
The technological difficulties of aurification temperature drop, but its manganese content is only 7 ~ 11%, and the temperature drop that the manganese alloy of addition generates is relatively small, and converter is blown
During oxygen, manganese is oxidized, and the lower problem of manganese yield still remains.
" a kind of high equiaxial crystal ratio potassium steel steel ingot and its smelting are disclosed application No. is 201510547982.0 Chinese patent
Smelting method ", is related to the method using 200kg grades of vacuum induction furnace smelting potassium steel steel ingots, steel ingot wherein Mn17.5% ~ 18.5%,
Als5.8% ~ 6.2% solves the problems, such as coarse equiax crystal easy to form in process of setting, but induction furnace is only 200kg, and single adds
Enter a large amount of manganese, aluminium alloy, only melted by grate, temperature and ingredient will reach enough and uniformly have certain difficulty.
Summary of the invention
The purpose of the present invention is to propose to a kind of 50t intermediate frequency furnaces, and high manganese high-alumina non-magnetic steel plate and its manufacturing method is made,
Yield strength Rp0.2 >=340MPa under the steel plate room temperature, tensile strength Rm >=600MPa, elongation after fracture A 45% ~ 50%,
Contraction percentage of area Z >=65%, relative permeability≤1.004, and manufacturing process guarantee manganese in smelting using manganese alloy is added in batches
It is melted during refining uniformly, while being inserted into rare earth stick before molding, obtains the uniform slab of chemical component, closed through controlled rolling
Lattice steel plate, the steel plate chemical component and microscopic structure of manufacturing method production are uniform, and good mechanical performance, relative permeability is low,
Internal stress is lower, and plate shape is good.
To achieve the above object, the present invention proposes that high manganese high-alumina non-magnetic steel plate and its system is made in a kind of 50t intermediate frequency furnace
Method is made, component and weight percent content include:
C:0.08~0.25%, Si:0.25~0.40%, Mn:15~20%, P≤0.020%, S≤0.010%, Al:2~4%, Nb:
0.02~0.04%, V:0.015 ~ 0.030%, Ti:0.014 ~ 0.018%, Cu:0.012 ~ 0.016%, remaining is for Fe and unavoidably
Impurity.
Preferably, yield strength Rp0.2 >=340MPa under the steel plate room temperature, tensile strength Rm >=600MPa have no progeny
Elongation A is 45% ~ 50%, contraction percentage of area Z >=65%.
In addition, to achieve the above object, the present invention proposes that high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace
Manufacturing method includes the following steps:
Its main flow includes: at induction furnace smelting → Argon → LF furnace refining → molding → forging → rolling → cooling → heat
Reason, the induction furnace smelting step include that the raw materials such as high manganese steel scrap, lime are packed into 50t Medium frequency induction stove heating and are smelted, tapping
Manganese metal or electrolytic manganese after baking are added in preceding 15min ~ 30min, taps after heating fusing, control manganese content is 6 ~ 12%；Institute
The step of stating the refining of LF furnace includes that lime, fluorite slag making is added, has made white slag using calcium carbide, carbon dust, aluminium powder deoxidation and has skimmed,
Manganese metal or electrolytic manganese after baking are added again, control manganese content is 15 ~ 20%.
Preferably, the manganese metal or electrolytic manganese need to be toasted at a high temperature of 300 DEG C ~ 500 DEG C before induction furnace is added 3h ~
5h。
Preferably, 3 ~ 7min of argon blowing time is kept in the Argon step.
Preferably, the step of LF furnace refines further include: LF is added in the aluminium block being welded on steel ingot in advance after skimming
Furnace, and contact steel ingot with molten steel, after being melted to aluminium block, steel ingot is hung.
Preferably, after the fusing of aluminium block described in the step of LF furnace refines further include: by rare earth stick by 0.4 ~
In the ratio insertion molten steel of 0.8kg/t, molten steel is sling after 5 ~ 12 minutes and is molded by soft blow.
In technical solution provided by the invention, manganese is added in batches by using in induction heater stage and LF furnace refining stage
Alloy, and manganese is toasted a few hours at high temperature, guarantee that manganese melts uniformly in smelting process, to improve the recovery rate of manganese, and
Al is uniformly added by steel ingot in LF furnace refining stage, guarantees that aluminium deoxidation is abundant, while being inserted into rare earth stick before molding, obtains chemistry
The uniform slab of ingredient obtains qualified steel plate through controlled rolling.
The manufacturing method that high manganese high-alumina non-magnetic steel plate is made in the 50t intermediate frequency furnace has the advantage that 1) technique is not
By being vacuum-treated, the risk that the volatilization of manganese steam causes manganese yield to reduce or even explode is avoided；2) metal being added
Uniformly, reaction efficiency is high, improves the recovery rate and homogeneity of ingredients of manganese for manganese and aluminium block fusing；3) duration of heat is shortened, is dropped
Low labor intensity, improves efficiency；4) technique uses 50t intermediate frequency furnace, and treating capacity is big, high production efficiency.
The 50t Medium frequency induction refines to obtain yield strength Rp0.2 >=340MPa under high manganese high-alumina non-magnetic steel plate room temperature, resists
Tensile strength Rm >=600MPa, elongation after fracture A are 45% ~ 50%, contraction percentage of area Z >=65%, relative permeability≤1.004, the steel
Plate chemical component and microscopic structure are uniform, and good mechanical performance, relative permeability is low, and internal stress is lower, and plate shape is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is that gold of the high manganese high-alumina non-magnetic steel plate after rolling and heat treatment is made in a kind of 50t intermediate frequency furnace of the present invention
Phase constitution figure；
Fig. 2 is the stream that one embodiment of high manganese high-alumina non-magnetic steel plate and its manufacturing method is made in a kind of 50t intermediate frequency furnace of the present invention
Journey schematic diagram.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
Following serial numbers of the embodiment of the present invention are for illustration only, do not represent the advantages or disadvantages of the embodiments.
Herein, the use of word first, second, and third does not indicate any sequence.It can be by these word solutions
It is interpreted as title.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
High manganese high-alumina non-magnetic steel plate and its manufacturing method, component is made in a kind of 50t intermediate frequency furnace proposed by the present invention
And weight percent content includes:
C:0.08~0.25%, Si:0.25~0.40%, Mn:15~20%, P≤0.020%, S≤0.010%, Al:2~4%, Nb:
0.02~0.04%, V:0.015 ~ 0.030%, Ti:0.014 ~ 0.018%, Cu:0.012 ~ 0.016%, remaining is for Fe and unavoidably
Impurity.
The effect and control of each component have the feature that in the present invention
C: carbon on the intensity, toughness of steel, welding performance and smelting cost influence it is very big, carbon be guarantee hardness of steel element it
One of one and the element of stable austenite, when the manganese content in steel is higher, the increase of carbon element content can make steel rolling
Rear hardness increases, and welding performance, which is reduced to, to be caused not easy to be processed, and it is enough that suitable carbon element content can guarantee that steel has
Intensity, enough stability, good welding performance and cold-forming property, therefore, the zone of reasonableness control of C content of the present invention is
0.08~0.25%.
Si:Si is common deoxidier, and can be improved steel plate quenching intensity, but when silicone content is excessively high, the weldering to steel plate
It is unfavorable to connect performance, while also will cause rolling process iron scale and being difficult to eliminate, influences plate surface quality, Si in the present invention
Content range control is 0.25~0.40%.
Mn: manganese is main austenite former, and higher energy content makes the austenite phase equilibrium temperature area in steel
Between become larger, with stable austenite phase constitution, so that it is guaranteed that steel still has lower relative permeability under higher magnetic field strength,
Meanwhile higher manganese content makes the austenite grain in hot procedure that twin transformation occur, and plays the role of refining crystal grain,
To increase substantially the intensity and plasticity of material, therefore, the content range control of Mn is 15~20% in the present invention.
P and S: belonging in steel harmful tramp element, easily form the defects of being mingled with, being segregated, influence steel plate impact flexibility,
Elongation after fracture, weldability and Z-direction performance.For Z-direction steel, strict control S content is especially wanted, prevents that MnS, MnS are mingled with
Easily cause the lamellar tearing of steel plate, the present invention controls P≤0.020%, S≤0.010%.
Al:Al is the main deoxidant element in steel, while being capable of fixing N element, refinement crystal grain, improves the toughness of steel,
It can inhibit the martensitic traoformation of γ → ε, while promoting the formation of deformation twin, reduce the density of steel, Al content model in the present invention
It contains and is made as 2 ~ 4%.
Nb: niobium can significantly improve the austenite recrystallization temperature of steel, expand Unhydrated cement range, be easy to implement high temperature
Rolling.Niobium can also inhibit Austenite Grain Growth, have significant ground refined crystalline strengthening and precipitation strength effect, this is just that steel plate exists
It still provides the foundation with fine tissue after quenching add-back fire, is conducive to improve toughness, but limit value and heating by C content
The influence of temperature, excessively high Nb can not be dissolved, and deteriorate welding performance, and Nb control content of the invention is 0.02~0.04%.
The compound of V:V is only precipitated in γ/α phase transition process or after phase transformation, and precipitate is very tiny, has very significant
Precipitating reinforcing effect, added in steel a certain amount of vanadium can play the role of further refine experience, V content model of the present invention
System is contained 0.015 ~ 0.030%.
Ti:TiC is more stable, can inhibit Austenite Grain Growth, in addition, Ti also has strong solid N effect, to keep away
Exempt to be formed the nitride of B, so that it is guaranteed that the effect of the raising harden ability of B element, Ti control content 0.014 of the present invention~
0.018%。
The intensity and resistance to atmosphere and marine corrosion performance of steel can be improved in Cu:Cu, and a certain amount of Cu is added in steel, is improving
It can also improve the fatigue crack extended capability of steel while the corrosion resistance of steel, in the present invention, control the content range of Cu
It is 0.012 ~ 0.016%.
High manganese high-alumina non-magnetic steel is made according to the 50t intermediate frequency furnace that said components and weight percent content manufacture
Plate, yield strength Rp0.2 >=340MPa under room temperature, tensile strength Rm >=600MPa, elongation after fracture A are 45% ~ 50%, section
Shrinking percentage Z >=65%, relative permeability≤1.004, Fig. 1 are that high manganese high-alumina non-magnetic steel is made in a kind of 50t intermediate frequency furnace of the present invention
Metallographic structure figure of the plate after rolling and heat treatment, the steel microscopic structure is uniform, is austenite, and relative permeability is low.
The present invention also proposes that the manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace, and Fig. 2 is this hair
The flow diagram of one embodiment of manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of bright 50t intermediate frequency furnace, main
Process includes: S10, induction furnace smelting → S20, Argon → S30, LF furnace refining → S40, molding → S50, forging → S60, rolling
→ S70, cooling → S80 are heat-treated, and include in the induction furnace smelting step S10, and the raw materials such as high manganese steel scrap, lime are packed into
50t Medium frequency induction stove heating is smelted, and manganese metal or electrolytic manganese after baking, heating fusing is added before tapping in 15min ~ 30min
After tap, control manganese content be 6 ~ 12%；It include lime, fluorite slag making being added, using electricity in the LF furnace refinement step S30
Stone, carbon dust, aluminium powder deoxidation have made white slag and have skimmed, again be added baking after manganese metal or electrolytic manganese, control manganese content be 15 ~
20%.The additional amount of manganese is divided induction furnace and LF refining furnace two stages to be proportionally added by the manufacturing method, is solved a large amount of manganese and is added
Afterwards, molten steel temperature sharply declines, the low problem of the recovery rate of manganese.
Further, in the induction furnace smelting step S10 further include: step S11, the manganese metal or electrolytic manganese are added
3h ~ 5h need to be toasted before induction furnace at a high temperature of 300 DEG C ~ 500 DEG C.Shorten the time of manganese metal fusing and homogenization, improves
The recovery rate of manganese improves efficiency so as to shorten the duration of heat.
Further, 3 ~ 7min of argon blowing time is kept in the Argon step S20.The step of Argon is in order to uniform
Molten steel composition and temperature can carry out trimming according to the molten steel composition that quick analysis provides in Argon whipping process, with
Keep the Composition Control range of steel narrower, to ensure that steel performance is uniform, while it is de- to remove the gred to promote inclusion floating to exclude slag blanket
Oxygen.
Further, the LF furnace refinement step S30 further include: step S31 will be welded on steel ingot in advance after skimming
LF furnace is added in aluminium block, and contacts steel ingot with molten steel, and after melting to aluminium block, steel ingot is hung.
The step need to guarantee that steel ingot is not contacted with molten steel, prevent from influencing molten steel component, aluminium block be welded below steel ingot be by
Lower in aluminum density, molten steel surface can be swum in by being directly added into a large amount of aluminium block, it is difficult to which fusing uniformly, makes two in aluminium and steel slag
Silica reacts, and keeps increasing silicon in molten steel obvious, to reduce the recovery rate of Al, and the mode of aluminium should be added to avoid and feed aluminum steel
Add the onerous toil intensity of aluminium.
Further, after aluminium block fusing described in the step S30 of the LF furnace refining further include: step S32, it will be dilute
Native stick in the ratio insertion molten steel of 0.4 ~ 0.8kg/t, sling after 5 ~ 12 minutes and molded by soft blow by molten steel.The step is used for
To the inclusion conditioning processing in molten steel, steel is purified, the cold forming capability of steel is improved.
The manufacturing method of high manganese high-alumina non-magnetic steel plate is made in the 50t intermediate frequency furnace, by using in induction heater stage
Manganese alloy is added in batches with LF furnace refining stage, and manganese is toasted a few hours at high temperature, guarantees that manganese melts in smelting process
Change uniformly, to improve the recovery rate of manganese, and Al is uniformly added by steel ingot in LF furnace refining stage, guarantees that aluminium deoxidation is abundant, together
When molding before be inserted into rare earth stick, obtain the uniform slab of chemical component, obtain qualified steel plate through controlled rolling.
The manufacturing method that high manganese high-alumina non-magnetic steel plate is made in the 50t intermediate frequency furnace has the advantage that 1) technique is not
By being vacuum-treated, the risk that the volatilization of manganese steam causes manganese yield to reduce or even explode is avoided；2) metal being added
Uniformly, reaction efficiency is high, improves the recovery rate and homogeneity of ingredients of manganese for manganese and aluminium block fusing；3) duration of heat is shortened, is dropped
Low labor intensity, improves efficiency.
Technical solution of the present invention is described in further detail below in conjunction with specific embodiments and the drawings, it should be understood that
Following embodiment is only used to explain the present invention, is not used in the restriction present invention.
Embodiment 1
The component and its weight percent content of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace are as follows: C:
0.25%, Si:0.25%, Mn:15%, P≤0.020%, S≤0.010%, Al:2%, Nb:0.02%, V:0.015%, Ti:0.014%,
Cu:0.012%, remaining is Fe and inevitable impurity.
The step of manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace are as follows:
(1) raw materials such as high manganese steel scrap, lime are packed into 50t Medium frequency induction stove heating to smelt, induction is added in manganese metal or electrolytic manganese
4h is toasted before furnace at a high temperature of 400 DEG C, manganese metal or electrolytic manganese after baking, heating fusing is added before tapping in 20min
After tap, control manganese content be 6%；
(2) argon blowing time 4min is kept；
(3) lime, fluorite slag making is added, white slag has been made using calcium carbide, carbon dust, aluminium powder deoxidation and has been skimmed, manganese metal is added again
Or electrolytic manganese, control manganese content are 20%；
(4) LF furnace is added in aluminium block, after being melted to aluminium block, rare earth stick is inserted into molten steel in the ratio of 0.5kg/t, soft blow
Molten steel is sling after 6 minutes and is molded.
Using above-mentioned elemental constituent content and the high nonmagnetic steel plate of manganese high alumina of processing technology step manufacture, bending under room temperature
Taking intensity Rp0.2 is 341MPa, and tensile strength Rm is 612MPa, and elongation after fracture A is 49.5%, and contraction percentage of area Z is 68%, phase
To magnetic permeability≤1.002.
Embodiment 2
The component and its weight percent content of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace are as follows: C:
0.15%, Si:0.35%, Mn:16%, P≤0.020%, S≤0.010%, Al:3.5%, Nb:0.03%, V:0.02%, Ti:0.015%,
Cu:0.014%, remaining is Fe and inevitable impurity.
The step of manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace are as follows:
(1) raw materials such as high manganese steel scrap, lime are packed into 50t Medium frequency induction stove heating to smelt, induction is added in manganese metal or electrolytic manganese
5h is toasted before furnace at a high temperature of 420 DEG C, manganese metal or electrolytic manganese after baking, heating fusing is added before tapping in 16min
After tap, control manganese content be 8%；
(2) argon blowing time 5min is kept；
(3) lime, fluorite slag making is added, white slag has been made using calcium carbide, carbon dust, aluminium powder deoxidation and has been skimmed, manganese metal is added again
Or electrolytic manganese, control manganese content are 18%；
(4) LF furnace is added in aluminium block, after being melted to aluminium block, rare earth stick is inserted into molten steel in the ratio of 0.6kg/t, soft blow
Molten steel is sling after 8 minutes and is molded.
Using above-mentioned elemental constituent content and the high nonmagnetic steel plate of manganese high alumina of processing technology step manufacture, bending under room temperature
Taking intensity Rp0.2 is 369MPa, and tensile strength Rm is 619MPa, and elongation after fracture A is 45%, and contraction percentage of area Z is 65%, relatively
Magnetic permeability≤1.004.
Embodiment 3
The component and its weight percent content of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace are as follows: C:
0.08%, Si:0.40%, Mn:20%, P≤0.020%, S≤0.010%, Al:4%, Nb:0.04%, V:0.03%, Ti:0.018%,
Cu:0.016%, remaining is Fe and inevitable impurity.
The step of manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace are as follows:
(1) raw materials such as high manganese steel scrap, lime are packed into 50t Medium frequency induction stove heating to smelt, induction is added in manganese metal or electrolytic manganese
3h is toasted before furnace at a high temperature of 430 DEG C, manganese metal or electrolytic manganese after baking, heating fusing is added before tapping in 28min
After tap, control manganese content be 12%；
(2) argon blowing time 6min is kept；
(3) lime, fluorite slag making is added, white slag has been made using calcium carbide, carbon dust, aluminium powder deoxidation and has been skimmed, manganese metal is added again
Or electrolytic manganese, control manganese content are 15%；
(4) LF furnace is added in aluminium block, after being melted to aluminium block, rare earth stick is inserted into molten steel in the ratio of 0.8kg/t, soft blow
Molten steel is sling after 12 minutes and is molded.
Using above-mentioned elemental constituent content and the high nonmagnetic steel plate of manganese high alumina of processing technology step manufacture, bending under room temperature
Taking intensity Rp0.2 is 384MPa, and tensile strength Rm is 630MPa, and elongation after fracture A is 45.5%, and contraction percentage of area Z is 66%, phase
To magnetic permeability≤1.003.
The all data table of comparisons of embodiment 1 ~ 3 provided by the invention refers to table 1 ~ 4.
Chemical constituent and weight percent content list (wt%) in 1 various embodiments of the present invention of table
Main steel rolling process parameter list in 2 various embodiments of the present invention of table
The mechanical property list of 3 various embodiments of the present invention light plate of table
The relative permeability list of 4 various embodiments of the present invention light plate of table
From table 1 ~ 4 as can be seen that using elemental constituent provided by the invention and weight percent content and manufacturer's legal system
High manganese high-alumina non-magnetic steel plate is made in the 50t intermediate frequency furnace obtained, carries out room temperature tension test and Z-direction tension test, as a result:
Yield strength Rp0.2 >=340MPa under room temperature, tensile strength Rm >=600MPa, elongation after fracture A 45% ~ 50%, receive by section
Shrinkage Z >=65%, relative permeability≤1.004, the steel plate chemical component and microscopic structure are uniform, good mechanical performance, opposite to lead
Magnetic rate is low, and internal stress is lower, and plate shape is good.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (7)
1. high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace, it is characterised in that: the component and weight hundred of the steel plate
Divide than content and includes:
C:0.08~0.25%, Si:0.25~0.40%, Mn:15~20%, P≤0.020%, S≤0.010%, Al:2~4%, Nb:
0.02~0.04%, V:0.015 ~ 0.030%, Ti:0.014 ~ 0.018%, Cu:0.012 ~ 0.016%, remaining is for Fe and unavoidably
Impurity.
2. high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace according to claim 1, it is characterised in that: institute
State yield strength Rp0.2 >=340MPa under steel plate room temperature, tensile strength Rm >=600MPa, elongation after fracture A 45% ~ 50%,
Contraction percentage of area Z >=65%, relative permeability≤1.004.
3. the system of high manganese high-alumina non-magnetic steel plate is made to a kind of 50t intermediate frequency furnace described in 2 any one according to claim 1
Make method, it is characterised in that: its main flow includes: induction furnace smelting → Argon → LF furnace refining → molding → forging → rolling
→ cooling → heat treatment, the induction furnace smelting step include that the raw materials such as high manganese steel scrap, lime are packed into 50t intermediate frequency furnace
Heating is smelted, and manganese metal or electrolytic manganese after baking is added before tapping in 15min ~ 30min, taps after heating fusing, controls manganese
Content is 6 ~ 12%；The step of LF furnace refines includes that lime, fluorite slag making is added, is made using calcium carbide, carbon dust, aluminium powder deoxidation
Good white slag is simultaneously skimmed, and manganese metal or electrolytic manganese after baking are added again, and control manganese content is 15 ~ 20%.
4. the manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace according to claim 3, special
Sign is: the manganese metal or electrolytic manganese are added induction furnace and need to toast 3h ~ 5h at a high temperature of 300 DEG C ~ 500 DEG C before.
5. the manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace according to claim 3, special
Sign is: 3 ~ 7min of argon blowing time is kept in the Argon step.
6. a kind of manufacture that high manganese high-alumina non-magnetic steel plate is made using the smelting of 50t intermediate frequency furnace according to claim 3
Method, it is characterised in that: the step of LF furnace refines further include: LF is added in the aluminium block being welded on steel ingot in advance after skimming
Furnace, and contact steel ingot with molten steel, after being melted to aluminium block, steel ingot is hung.
7. the manufacturing method of high manganese high-alumina non-magnetic steel plate is made in a kind of 50t intermediate frequency furnace according to claim 5, special
Sign is: after the fusing of aluminium block described in the step of LF furnace refines further include: rare earth stick is pressed to the ratio of 0.4 ~ 0.8kg/t
In example insertion molten steel, molten steel is sling after 5 ~ 12 minutes and is molded by soft blow.
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| CN111663071A (en) * | 2020-06-17 | 2020-09-15 | 中冶东方工程技术有限公司 | Economical chromium-manganese stainless steel smelting production method and system thereof |
| CN112391571A (en) * | 2020-11-25 | 2021-02-23 | 攀钢集团西昌钢钒有限公司 | Control method for cleanliness of high-strength high-aluminum high-manganese steel |
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| CN115478219A (en) * | 2022-09-15 | 2022-12-16 | 山西太钢不锈钢股份有限公司 | Low-magnetic thread steel for building and preparation method thereof |
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