CN107475527A - A kind of high efficient thermoforming process of Mo austenitic stainless steels - Google Patents
A kind of high efficient thermoforming process of Mo austenitic stainless steels Download PDFInfo
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- CN107475527A CN107475527A CN201710625975.7A CN201710625975A CN107475527A CN 107475527 A CN107475527 A CN 107475527A CN 201710625975 A CN201710625975 A CN 201710625975A CN 107475527 A CN107475527 A CN 107475527A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
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Abstract
The present invention relates to a kind of high efficient thermoforming process of Mo austenitic stainless steels, consutrode is smelted first, secondly, is smelted consutrode into high Mo austenite stainless steel ingot using electroslag remelting process：Consutrode is preheated to 500 600 DEG C, is incubated 56 hours；From slag charge, slag charge is toasted, baking temperature is 800 DEG C, and baking time is 8 10 hours；Using graphite electrode striking slag making；Consutrode is moved in liquid slag bath, under atmospheric environment, starts electroslag remelting；Then, after surface of steel ingot polishing cleaning, in workpiece surface even application 0.5mm thickness high-temp. resistant antioxidation coatings；Finally, steel ingot thermo forming, steel ingot hot forging temperature range are 950 DEG C 1250 DEG C.Present invention reduces the thermo forming difficulty of high Mo austenitic stainless steels, and a deflection is improved to more than 10%, production efficiency and yield rate is improved, saves the energy.
Description
Technical field
The present invention relates to a kind of moulding process, specifically a kind of high efficient thermoforming process of Mo austenitic stainless steels.
Background technology
Austenitic stainless steel, refer to that there is the stainless steel of austenite structure at normal temperatures.In papermaking, desalinization, flue gas
In desulfurization, chemical emission processing industry, by improving molybdenum in austenitic stainless steel（Mo）Content, it can be improved in chloride
Resistance to spot corrosion, crevice corrosion in environment, reproducibility acid, stress corrosion performance, improve the reliability of device.Wherein, high Mo Ovshinskies
The Mo contents of body stainless steel are up to 4-8%, and higher Mo contents cause the hot-working character severe exacerbation of stainless steel, and yield rate is low,
Its application is limited to a certain extent.
High Mo austenitic stainless steels are in heating process, and Mo is segregated in grain boundaries in steel ingot, and the Mo of grain boundaries adds in high temperature
Occur to aoxidize the oxidative crack caused along crystal boundary to material internal in thermal process；Mo oxide is volatile at high temperature, causes
Steel surface and crystal boundary over oxidation, form surface pockmark and along grain-boundary crack, cause hot-working character to be deteriorated.The higher Mo's of temperature
Diffusion is faster, and Mo diffuses to the oxide that oxide-film combines to form Mo with matrix intersection with O, and Mo oxide is volatile to be caused
Damage layer is aoxidized, accelerated oxidation is carried out.The Mo that grain boundaries are segregated in steel ingot is easier to spread, and causes grain boundary oxidation.Air
In oxygen aoxidized with steel ingot, oxidation rate increases with the rise of temperature, temperature be less than 1150 DEG C when, have it is higher
Oxidation resistance；When temperature is higher than 1150 DEG C, oxidation rate sharply increases, and cracking occurs during thermal processing distortion,
Forging is caused to be scrapped.And the resistance of deformation of high Mo austenitic stainless steels thermo forming increases with the reduction of temperature.
Therefore, the thermo forming technique of high Mo austenitic stainless steels is at present：By Heating Steel Ingots to 950-1150 DEG C, adopt
Steel ingot is deformed into shape of product with flat-die hammer or forcing press.A kind of patent " novel super Ovshinskies of the A of CN 102021500
The forging molding temperature of high Mo austenitic stainless steels is 950-1150 DEG C in body 6Mo types stainless steel ", and roll forming temperature is
1100-1150℃.The advantages of technique is：It is possible to prevente effectively from the heated oxide of steel ingot, it is difficult to understand to solve high Mo to a certain extent
The thermo forming problem of family name's body stainless steel.The shortcomings that technique is：1. steel ingot hot-working in 950-1150 DEG C of temperature range
During deformation, the resistance of deformation of material is big, and shaping difficulty increase, one time deflection is less than 5%, low production efficiency；2. high Mo austenites
Stainless steel needs heating for multiple times during thermo forming, and heating times are up to 8-10 times, heats billet surface every time and all can
Produce iron scale and cause the loss of steel, waste is up to 5% or so, causes very big spillage of material and energy waste；3. heat
Processing and forming technology temperature range is narrow, and the requirement to equipment is high, in actual production process, it is difficult to control.
The content of the invention
The present invention seeks to for solve above-mentioned technical problem deficiency, there is provided a kind of high Mo austenitic stainless steels High Efficiency Thermal into
Type technique.
A kind of high efficient thermoforming process of Mo austenitic stainless steels, comprises the following steps：
（One）Pass through refining and aod at the beginning of intermediate frequency furnace（AOD）Stove refinery practice smelts high Mo austenite stainless steel electrode,
That is consutrode；The diameter d of consutrode and the diameter D of steel ingot ratio are 0.7-0.8；
（Two）Consutrode is smelted into high Mo austenite stainless steel ingot using electroslag remelting process, comprised the following steps：
（1）The oxide skin on consutrode surface is cleaned out, and is welded on dummy electrode, is sent into well formula resistance-heated furnace
Interior, consutrode is preheated to 500-600 DEG C, is incubated 5-6 hours, removes the moisture on consutrode surface；
（2）It is CaF from slag charge constituent and the mass percent of each composition250%~60%, Al2O315%~25%, CaO
10%~20%, MgO 3%~5%, is toasted to slag charge, and baking temperature is 800 DEG C, and baking time is 8-10 hours；
（3）Using graphite electrode striking slag making, by baked slag system according to CaF2、SiO2, CaO, MgO and Al2O3Order add
Enter into crystallizer, slag charge is fused into liquid, liquid slag temperature control is at 1650-1700 DEG C；To liquid in slag charge fusion process
Al is added in state slag deoxidation is carried out to slag.
（4）Consutrode is moved in liquid slag bath, under atmospheric environment, starts electroslag remelting, the diameter D of ESR ingot
Represent, corresponding electrode melting speed V is selected according to steel ingot diameter D size, wherein, V=(0.6-0.7) × D, ESR ingot is straight
Footpath D unit is mm, and electrode melting speed V unit is kg/h；
（5）After electrode melting, steel ingot Slow cooling 40-60 minutes in crystallizer, ensure liquid metal and slag solidification
Fully, it is air-cooled to room temperature after the steel ingot demoulding, the defects of removing the macroscopic crackle of surface of steel ingot, slag inclusion；
（Three）Surface of steel ingot sprays
After surface of steel ingot polishing cleaning, in workpiece surface even application 0.5mm thickness high-temp. resistant antioxidation coatings, the chemistry of the coating
Composition and percentage by weight are SiO2：65-70%；Al2O3：10-20%；MgO：2-7%；ZrO2：3-5%；B2O3:1-5%；
CaO：2-4%；Na2O：4-9%；Na2SiO3：3-10%；The coating has preferable dispersiveness, heat-resisting quantity, mobility, and
And there is certain cohesive force；Heating process floating coat is sintered, softening, semi-molten even in the process of molten state, in metal
Surface forms the plastic state glass film of densification, and film can completely cut off contact of the metal with extraneous oxidizing atmosphere completely, prevent steel
Ingot high-temperature oxydation；
（Four）Steel ingot thermo forming
When Forge Heating temperature is more than 1250 DEG C, steel ingot shearing resistance deformability is weaker, easily produces surface and heart check, when
When forging temperature is less than 950 DEG C, precipitated phase quickly separates out, and resistance of deformation increased dramatically, and steel ingot deformation performance drastically reduces；Cause
This, to ensure that steel ingot has good processability, relatively low resistance of deformation, ensures that forging stock has good surface, center portion matter
Amount, steel ingot hot forging temperature range of the invention are 950 DEG C -1250 DEG C, and preferable hot forging temperature range is 1050-
1200℃。
The steel ingot for spraying high-temp. resistant antioxidation coating is fitted into gas heating furnace and is heated to 1170-1250 DEG C, insulation
Quick tapping after 4-5 hours, thermo forming is carried out on forging hammer or forcing press, the temperature range of hot forging is 950 DEG C -1250
℃；Upset and pulling is passed through in hot forging, forges to required size, wherein, it is upset to compare R1>=1.5, R is compared in pulling2>=4, total forging ratio R
≥5；Then blank rapid water is cooled to room temperature, reduces and separates out phase amount；It is wherein upset to compare R1For the height and pier of upset preceding blank
R is compared in the height ratio of blank after thick, pulling2The sectional area ratio of blank after sectional area and pulling for blank before pulling, total forging
Make R=R1+ R2-1。
Beneficial effect is：
Compared with prior art, the present invention passes through the anti-oxidation painting of surface spraying high temperature resistant in high Mo austenite stainless steel ingot
Material, prevent surface of steel ingot that oxidation reaction occurs at high temperature, the Mo for reducing grain boundaries oxidation occurs in high-temperature heating process led
Cause the oxidative crack and surface oxidation pockmark probability along crystal boundary to material internal.By the thermo forming temperature range of material from
950-1150 DEG C brings up to 950-1250 DEG C, reduces the thermal processing distortion drag of material, by a deflection improve to 10% with
On, hot-working fire is reduced, avoids surface of steel ingot and centre burst in forging process, improves production efficiency and yield rate, is saved
The energy, and improve the high temperature elongation percentage of material.The material is that resistance of deformation is about 180Mpa at 1150 DEG C, and elongation percentage is about
30%；And be that resistance of deformation is about 120Mpa at 1250 DEG C, elongation percentage about 60%.Improve a deflection of deformation temperature material
It can double, production efficiency is enhanced about more than once, and yield rate is improved to more than 95% by the 70% of former technique.Meanwhile drop
The low oxidation loss of material, stock utilization can be improved to more than 97%, make up high Mo austenitic stainless steels in hot-workability
Inadequate natural endowment on energy, successfully produce surface flawless, fold, the qualified high Mo austenitic stainless steels of internal ultrasonic wave inspection
Forging products, the technology have obvious economic benefit.
Embodiment
Embodiment 1
The high Mo austenitic stainless steels thermo formings of 00Cr24Ni17Mn5Mo4NNb are carried out using the present invention, comprised the following steps：
The first step, pass through refining, aod at the beginning of intermediate frequency furnace（AOD）Stove refinery practice smelts high Mo austenitic stainless steels consumable
Electrode, a diameter of 310mm of consutrode, a diameter of 440mm of steel ingot, the diameter d of consutrode and the diameter D of steel ingot ratio
It is worth for 0.7；
Second step, using electroslag remelting process, consutrode is smelted into the high Mo austenite stainless of 00Cr24Ni17Mn5Mo4NNb
Steel ingot, its chemical analysis and percentage by weight are：C：0.021；Si：0.43；Mn：5.32；S：0.005；P：0.017；Cr：
24.12；Ni：17.03；Mo：4.35；Nb：0.06；N：0.521；Surplus is Fe.Smelting comprises the following steps：
（1）The slag charge constituent element and percentage by weight of selection be：CaF2：60%, Al2O3 ：20%, CaO:17%, MgO：3%, slag charge is
80kg, slag charge baking temperature are 800 DEG C, and baking time is 9 hours；
（2）By baked slag system according to CaF2、MgO、CaO、Al2O3Order be added in crystallizer, striking slag making, slugging
50 minutes time, in slag charge fusion process, Al is added into molten slag deoxidation is carried out to slag, Al addition is 300 grams, is protected
It is abundant to demonstrate,prove slag charge deoxidation；
（3）Consutrode is moved in liquid slag bath, electric slag refusion and smelting is carried out under atmospheric environment, electrode melting speed is
320kg/h, Al is uniformly added in smelting process and carries out deoxidation, Al addition is 3000 grams；
（4）After smelting terminates, steel ingot is air-cooled to room temperature in crystallizer inside holding 60 minutes after the demoulding；
（5）The defects of removing the macroscopic crackle of surface of steel ingot, slag inclusion.
3rd step, in workpiece surface even application 0.5mm thickness high-temp. resistant antioxidation coatings, the chemical analysis of the coating and again
Measuring percentage is：SiO2：66%th, Al2O3：12%th, MgO：4%th, ZrO2：4%th, B2O3:3%th, CaO：3%th, Na2O：4%th,
Na2SiO3：4%；
4th step, steel ingot is fitted into day hot gas heating furnace, is warming up to 1220 ± 10 DEG C, quick tapping after insulation 4.5 hours, adopted
It is with 2000T hydraulic presses that steel ingot is upset to 650mm height；Upset ratio is：1.85,1 fire is forged altogether；
5th step, will be upset after the pulling of steel ingot four directions, chamfered edge it is round as a ball to Φ 200mm poles, final forging temperature is more than 1000 DEG C, pulls out
Growing ratio is：9, total forging ratio is 9.85；Altogether forging 3 fire time, workpiece surface flawless, fold the defects of, according to NB/
T47013.3-2015 carries out ultrasonic examination, and center portion quality reaches the requirement of I levels；
It is fitted into after 6th step, the pole surface spraying high-temp. resistant antioxidation coating for finishing forging in chamber type electric resistance furnace, is warming up to
1150 ± 10 DEG C, 4 hours precipitated phases made in bar microstructure of insulation fully dissolve, and quick tapping water quenching to room temperature, prevent
The secondary formation of precipitated phase.
Embodiment 2
The high Mo austenite stainless steel workpiece thermo formings of 00Cr20Ni18Mo6CuN, including following step are carried out using the present invention
Suddenly：
The first step, pass through refining, aod at the beginning of intermediate frequency furnace（AOD）Stove refinery practice smelts high Mo austenitic stainless steels consumable
Electrode, a diameter of 310mm of consutrode, a diameter of 440mm of steel ingot, the diameter d of consutrode and the diameter D of steel ingot ratio
It is worth for 0.7；
Second step, using electroslag remelting process, consutrode is smelted into the high Mo austenitic stainless steels of 00Cr20Ni18Mo6CuN
Steel ingot, its chemical analysis and percentage by weight are：C：0.012；Si：0.35；Mn：0.50；S：0.005；P：0.018；Cr：
19.91；Ni：17.78；Mo：6.30；Cu：0.68；N：0.19；Surplus is Fe.Smelting comprises the following steps：
（1）The slag charge constituent element and percentage by weight of selection be：CaF2：55%, Al2O3 ：25%, CaO:15%, MgO：5%, slag charge is
80kg, slag charge baking temperature are 800 DEG C, and baking time is 9 hours；
（2）By baked slag system according to CaF2、MgO、CaO、Al2O3Order be added in crystallizer, striking slag making, slugging
50 minutes time, in slag charge fusion process, Al is added into molten slag deoxidation is carried out to slag, Al addition is 250 grams, is protected
It is abundant to demonstrate,prove slag charge deoxidation；
（3）Consutrode is moved in liquid slag bath, electric slag refusion and smelting is carried out under atmospheric environment, electrode melting speed is
320kg/h, Al is uniformly added in smelting process and carries out deoxidation, Al addition is 2000 grams；
（4）After smelting terminates, steel ingot is air-cooled to room temperature in crystallizer inside holding 60 minutes after the demoulding；
（5）The defects of removing the macroscopic crackle of surface of steel ingot, slag inclusion.
3rd step, in workpiece surface even application 0.5mm thickness high-temp. resistant antioxidation coatings, the chemical analysis of the coating and again
Measuring percentage is：SiO2：66%th, Al2O3：12%th, MgO：4%th, ZrO2：4%th, B2O3:3%th, CaO：3%th, Na2O：4%th,
Na2SiO3：4%；
4th step, steel ingot is fitted into day hot gas heating furnace, is warming up to 1200 ± 10 DEG C, quick tapping after insulation 5 hours, used
2000T hydraulic presses are upset to 550mm height by steel ingot；Upset ratio is：2.1,1 fire is forged altogether；
5th step, will be upset after the pulling of steel ingot four directions, chamfered edge it is round as a ball to Φ 220mm poles, final forging temperature is more than 1000 DEG C, pulls out
Growing ratio is：9.1, total forging ratio is 10.2, forges 3 fire altogether；The defects of workpiece surface flawless, folding, according to NB/
T47013.3-2015 carries out ultrasonic examination, and center portion quality reaches the requirement of I levels；
It is fitted into after 6th step, the pole surface spraying high-temp. resistant antioxidation coating for finishing forging in chamber type electric resistance furnace, is warming up to
1150 ± 10 DEG C, 2 hours precipitated phases made in bar microstructure of insulation fully dissolve, and quick tapping water quenching to room temperature, prevent
The secondary formation of precipitated phase.
Embodiment 3
The high Mo austenite stainless steel workpiece thermo formings of 00Cr24Ni22Mo7Mn3CuN are carried out using the present invention, including it is following
Step：
The first step, pass through refining, aod at the beginning of intermediate frequency furnace（AOD）Stove refinery practice smelts high Mo austenitic stainless steels consumable
Electrode, a diameter of 310mm of consutrode, a diameter of 440mm of steel ingot, the diameter d of consutrode and the diameter D of steel ingot ratio
It is worth for 0.7；
Second step, using electroslag remelting process, consutrode is smelted into the high Mo austenite stainless of 00Cr24Ni22Mo7Mn3CuN
Steel ingot, its chemical analysis and percentage by weight are：C：0.010；Si：0.27；Mn：3.21；S：0.0023；P：0.012；Cr：
24.15；Ni：22.12；Mo：7.23；Cu：0.52；N：0.51；Surplus is Fe.Smelting comprises the following steps：
（1）The slag charge constituent element and percentage by weight of selection be：CaF2：58%, Al2O3 ：20%, CaO:18%, MgO：4%, slag charge is
80kg, slag charge baking temperature are 800 DEG C, and baking time is 9 hours；
（2）By baked slag system according to CaF2、MgO、CaO、Al2O3Order be added in crystallizer, striking slag making, slugging
50 minutes time, in slag charge fusion process, Al is added into molten slag deoxidation is carried out to slag, Al addition is 300 grams, is protected
It is abundant to demonstrate,prove slag charge deoxidation；
（3）Consutrode is moved in liquid slag bath, electric slag refusion and smelting is carried out under atmospheric environment, electrode melting speed is
320kg/h, Al is uniformly added in smelting process and carries out deoxidation, Al addition is 3000 grams；
（4）After smelting terminates, steel ingot is air-cooled to room temperature in crystallizer inside holding 60 minutes after the demoulding；
（5）The defects of removing the macroscopic crackle of surface of steel ingot, slag inclusion.
3rd step, in workpiece surface even application 0.5mm thickness high-temp. resistant antioxidation coatings, the chemical analysis of the coating and again
Measuring percentage is：SiO2：66%th, Al2O3：12%th, MgO：4%th, ZrO2：4%th, B2O3:3%th, CaO：3%th, Na2O：4%th,
Na2SiO3：4%；
4th step, steel ingot is fitted into day hot gas heating furnace, is warming up to 1220 ± 10 DEG C, quick tapping after insulation 5 hours, used
2000T hydraulic presses are upset to 600mm height by steel ingot；Upset ratio is：1.7,1 fire is forged altogether；
5th step, will be upset after the pulling of steel ingot four directions, chamfered edge it is round as a ball to Φ 250mm poles, final forging temperature is more than 1000 DEG C, pulls out
Growing ratio is：6.5, total forging ratio is 7.2, forges 2 fire altogether；The defects of workpiece surface flawless, folding, according to NB/
T47013.3-2015 carries out ultrasonic examination, and center portion quality reaches the requirement of I levels；
It is fitted into after 6th step, the pole surface spraying high-temp. resistant antioxidation coating for finishing forging in chamber type electric resistance furnace, is warming up to
1150 ± 10 DEG C, 4 hours precipitated phases made in bar microstructure of insulation fully dissolve, and quick tapping water quenching to room temperature, prevent
The secondary formation of precipitated phase.
The present invention utilizes above-mentioned manufacture method, is repeatedly produced, obtains good result, entered using the forming method
The thermoforming of the high Mo austenitic stainless steels of row, while thermo forming temperature is further improved, effectively prevent high Mo Ovshinskies
The high-temperature oxydation of body stainless steel, production efficiency is improved, improve stock utilization, yield rate, reduce production cost, the technology has
Obvious economic benefit, be advantageous to the marketing application of high Mo austenitic stainless steels.
Claims (4)
- A kind of 1. high efficient thermoforming process of Mo austenitic stainless steels, it is characterised in that：Comprise the following steps：（One）Just refined by intermediate frequency furnace and argon oxygen decarburizing furnace refinery practice smelts high Mo austenite stainless steel electrode, i.e. consumable Electrode；The diameter d of consutrode and the diameter D of steel ingot ratio are 0.7-0.8；（Two）Consutrode is smelted into high Mo austenite stainless steel ingot using electroslag remelting process, comprised the following steps：（1）The oxide skin on consutrode surface is cleaned out, and is welded on dummy electrode, is sent into well formula resistance-heated furnace Interior, consutrode is preheated to 500-600 DEG C, is incubated 5-6 hours；（2）It is CaF from the mass percent of slag charge composition and each composition250%~60%, Al2O315%~25%, CaO 10% ~20%, MgO 3%~5%；The slag charge of selection is toasted, baking temperature is 800 DEG C, and baking time is 8-10 hours；（3）Using graphite electrode striking slag making, by baked slag system according to CaF2、SiO2, CaO, MgO and Al2O3Order add Enter into crystallizer, slag charge is fused into liquid, liquid slag temperature control is at 1650-1700 DEG C；（4）Consutrode is moved in liquid slag bath, under atmospheric environment, starts electroslag remelting, the diameter D tables of ESR ingot Show, corresponding electrode melting speed V is selected according to steel ingot diameter D size, wherein, V=(0.6-0.7) × D, ESR ingot diameter D Unit be mm, electrode melting speed V unit is kg/h；（5）After electrode melting, steel ingot Slow cooling 40-60 minutes in crystallizer, ensure liquid metal and slag solidification Fully, be air-cooled to room temperature after the steel ingot demoulding, remove that surface of steel ingot naked eyes see the defects of opinion；（Three）Surface of steel ingot spraysAfter surface of steel ingot polishing cleaning, in workpiece surface even application 0.5mm thickness high-temp. resistant antioxidation coatings, the chemistry of the coating Composition and percentage by weight are SiO2：65-70%；Al2O3：10-20%；MgO：2-7%；ZrO2：3-5%；B2O3:1-5%； CaO：2-4%；Na2O：4-9%；Na2SiO3：3-10%；（Four）Steel ingot thermo formingThe steel ingot for spraying high-temp. resistant antioxidation coating is fitted into gas heating furnace and is heated to 1170-1250 DEG C, insulation 4-5 is small When after quick tapping, carry out thermo forming on forging hammer or forcing press, the temperature range of hot forging is 950 DEG C -1250 DEG C；Hot forging By upset and pulling, forge to required size, wherein, it is upset to compare R1>=1.5, R is compared in pulling2>=4, total forging ratio R >=5；Then Blank rapid water is cooled to room temperature, reduces and separates out phase amount；It is wherein upset to compare R1Height and upset rear blank for upset preceding blank Height ratio, pulling compare R2The sectional area ratio of blank after sectional area and pulling for blank before pulling, always forge R=R1+ R2-1。
- 2. the high efficient thermoforming process of Mo austenitic stainless steels as claimed in claim 1, it is characterised in that：The hot forging temperature range is 1050-1200 DEG C.
- 3. the high efficient thermoforming process of Mo austenitic stainless steels as claimed in claim 1, it is characterised in that：What the naked eyes were seen sees The defects of for visible crackle, slag inclusion.
- 4. the efficient thermoforming process of Mo austenitic stainless steels as claimed in claim 1, it is characterised in that：In slag charge fusion process to Aluminium is added in molten slag deoxidation is carried out to slag.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110452565A (en) * | 2019-07-25 | 2019-11-15 | 太原理工大学 | A kind of fire-resistant oxidation resistant coating of nickel-base alloy hot rolling and preparation method thereof |
| CN112831668A (en) * | 2020-12-03 | 2021-05-25 | 成都先进金属材料产业技术研究院有限公司 | G20CrNi2Electroslag remelting slag system of Mo alloy and application thereof |
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| CN112831668A (en) * | 2020-12-03 | 2021-05-25 | 成都先进金属材料产业技术研究院有限公司 | G20CrNi2Electroslag remelting slag system of Mo alloy and application thereof |
| CN114250402A (en) * | 2021-12-16 | 2022-03-29 | 大冶特殊钢有限公司 | Manufacturing method of low-carbon nitrogen-containing austenitic stainless steel bar |
| CN116121493A (en) * | 2023-01-09 | 2023-05-16 | 中北大学 | Heat treatment method of high-strength and high-toughness light wear-resistant high-manganese steel casting |
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