CN107030264A - A kind of super austenitic stainless steel double roll strip casting rolling production process - Google Patents
A kind of super austenitic stainless steel double roll strip casting rolling production process Download PDFInfo
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- CN107030264A CN107030264A CN201710288311.6A CN201710288311A CN107030264A CN 107030264 A CN107030264 A CN 107030264A CN 201710288311 A CN201710288311 A CN 201710288311A CN 107030264 A CN107030264 A CN 107030264A
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- 238000005266 casting Methods 0.000 title claims abstract description 39
- 238000005096 rolling process Methods 0.000 title claims abstract description 39
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 238000005098 hot rolling Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 46
- 229910052786 argon Inorganic materials 0.000 claims description 27
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000032798 delamination Effects 0.000 abstract description 3
- 239000002344 surface layer Substances 0.000 abstract description 3
- 238000005097 cold rolling Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/002—Stainless steels
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to a kind of super austenitic stainless steel double roll strip casting rolling production process, comprise the following steps：（1）The qualified molten steel of composition is hoisted to bale panoramic tables；（2）Molten steel is injected into tundish；（3）Double-roller rolling；（4）Made-up belt hot rolling；（5）The cooling and excision of strip are end to end；（6）Strip coiling.The present invention directly produces super austenitic stainless steel strip by double-roller rolling, simplifies hot-rolled process, it is to avoid the crack of surface layer and delamination splitting of super austenitic stainless steel during existing process hot rolling.It is combined by double-roller rolling and hot rolling, realizes the production of 1.0 3.5mm Thin Specs, qualified raw material is provided for follow-up cold-rolling process, energy resource consumption is reduced while shortening production procedure.
Description
Technical field
The invention belongs to thin-belt casting rolling production metallurgy field of engineering technology, and in particular to a kind of super austenitic stainless steel is double
Roll strip casting rolling production process.
Background technology
The metallographic structure of super austenitic stainless steel is the fully austenitic structure with face-centred cubic structure, is a kind of low-carbon
High-alloy steel, because the addition of the alloying elements such as Gao Ge, molybdenum, nickel, copper has this kind of steel, intensity is high, hardness is big, impact flexibility
Well, the strong and excellent decay resistance of good welding performance, high temperature creep-resisting ability.The particularization of super austenitic stainless steel
Study point, tissue and performance make this kind of steel be widely used in every field, especially in many harsh work condition environments
In, such as paper pulp and paper-making industry, pharmaceuticals industry, chemical fertilizer industry and sea field.But, due to the conjunction of super austenitic stainless steel
Golden component content is higher, especially Mo, Cr, makes easy carbide precipitate, chromium nitride and some intermetallics in stainless steel
Thing, such as σ phases, chi phases, Laves are equal.Especially when temperature in use is 600~1000 DEG C, second is mutually easier from stainless
Separated out in steel.If amount of precipitation reaches certain value, these interphases can reduce the mechanical property and corrosion resistance of material, so that
Influence the performance of material.
During existing process production super austenitic stainless steel, because the high alloy content of super austenitic stainless steel is caused
Make such steel manufacturing process requirement become very high, increase production difficulty, be prone in the hot rolling delamination splitting and
Crack of surface layer etc., this is greatly lowered product quality and lumber recovery.Further, since super austenitic stainless steel intensity is high, heat
More than 5mm think gauges can only be produced by rolling, and have a strong impact on the popularization and application of super austenitic stainless steel.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of super Ovshinsky for problems of the prior art
Body stainless steel double roll strip casting rolling production process.
Technical problem for the solution present invention is adopted the following technical scheme that：
A kind of super austenitic stainless steel double roll strip casting rolling production process, is comprised the following steps that：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super austenitic stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 15-25min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 10-20min drive out of in bag after air by long nozzle by molten steel from
Ladle is injected into tundish, and degree of superheat control is added on 20 DEG C -40 DEG C, molten steel for being incubated and adsorbing the centre being mingled with
Covering agent；；
（3）Double-roller rolling：Molten steel is injected in twin-roll cast-rolling mill by submersed nozzle, and strand speed is 80-120 m/min, casting
Roller gap is adjustable between 1.5-4.5mm, is carried out during MOLTEN STEEL FLOW using the mixed gas of argon gas or argon gas and hydrogen
Protection, molten steel is in Casting Roller in process of setting, and cooldown rate control range is 300-700 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet is in the mixed gas protected lower carry out hot rolling of argon gas or argon gas and hydrogen, protective gas pressure
Power 0.3-0.5MPa, made-up belt is sent to hot-rolling mill through pinch roll and carries out constant-tension rolling, and mill speed scope is 100-150 m/
Min, wherein made-up belt hot-rolled temperature control are 1050-1200 DEG C, and belt steel thickness control range is 1.2-3.6mm after made-up belt hot rolling；
（5）The cooling and excision of strip are end to end
Strip cooling after hot rolling, is sent to cutter through pinch roll and carries out the excision of strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
The step（3）Middle protective gas pressure is 0.3-0.5MPa.
The step（3）The volume ratio of middle argon gas and hydrogen is 3: 1.
The step（4）Middle protective gas pressure is 0.3-0.5MPa.
The step（4）The volume ratio of middle argon gas and hydrogen is 3: 1.
The step（5）Strip after middle hot rolling is cooled to 600-650 DEG C through cooling facility for laminar flow.
Double-roll type thin-belt casting rolling technology is metallurgical cutting edge technology, and commercial Application has been realized in carbon steel production.We are according to double
The characteristics of roll-type thin-belt casting rolling technique, it is incorporated among the production of super purified austenitic stainless steel, by rational matching thickness, pours
The key process parameters such as temperature, teeming speed, cooldown rate are cast, high-quality, inexpensive qualified super austenitic stainless steel is realized
The production of product.Beneficial effects of the present invention are：（1）Super austenitic stainless steel strip is directly produced by double-roller rolling,
Simplify hot-rolled process, it is to avoid the crack of surface layer and delamination splitting of super austenitic stainless steel during existing process hot rolling.（2）By double
Roller casting and hot rolling are combined, and realize the production of 1.2-3.6mm Thin Specs, and qualified raw material is provided for follow-up cold-rolling process,
Energy resource consumption is reduced while shortening production procedure.（3）Casting and course of hot rolling whole process are mixed using argon gas or argon gas and hydrogen
Gas shield is closed, Molten Steel Cleanliness is high, and scale on surface is thin, beneficial to raising product surface quality, and follow-up pickling cost
Reduction, the raising of production efficiency.
Brief description of the drawings
Fig. 1 is super austenitic stainless steel thin-belt casting rolling production procedure schematic diagram of the present invention.
Embodiment
In conjunction with specific embodiments, the present invention is described in further detail, but embodiments of the present invention are not limited to
This.
Embodiment 1
A kind of thickness 1.2mm, steel grade 904L super austenitic stainless steel double roll strip casting rolling production process comprise the following steps：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super austenitic stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 20min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 15min is driven out of molten steel in bag after air by long nozzle from ladle
It is injected into tundish, the degree of superheat is controlled at 30 DEG C, is added above molten steel for being incubated and adsorbing the tundish covering flux being mingled with；
（3）Double-roller rolling：Molten steel is injected into twin-roll cast-rolling mill by submersed nozzle, and strand speed is 120m/min, casting
Roller presets roll gap for 1.5mm, is protected during MOLTEN STEEL FLOW using argon gas, protective gas pressure 0.5Mpa, after casting
The made-up belt thickness arrived is 1.5mm.Molten steel is in Casting Roller in process of setting, and cooldown rate control range is 700 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet carries out hot rolling under argon gas protection, protective gas pressure 0.5Mpa, and made-up belt is through pinch roll
It is sent to hot-rolling mill and carries out constant-tension rolling, the m/min of mill speed 150,1200 DEG C of made-up belt hot-rolled temperature, strip after made-up belt hot rolling
Thickness is 1.2mm；
（5）The cooling and excision of strip are end to end
When temperature is cooled to 650 DEG C for 950 DEG C of strip through cooling facility for laminar flow after hot rolling, then it is sent to cutter through pinch roll and enters
The excision of row strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
Embodiment 2
A kind of thickness 1.8mm, steel grade 904L super austenitic stainless steel double roll strip casting rolling production process comprise the following steps：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super austenitic stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 20min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 15min is driven out of molten steel in bag after air by long nozzle from ladle
It is injected into tundish, the degree of superheat is controlled at 30 DEG C, is added above molten steel for being incubated and adsorbing the tundish covering flux being mingled with；
（3）Double-roller rolling：Molten steel is injected into twin-roll cast-rolling mill by submersed nozzle, and strand speed is 100m/min, casting
Roller presets roll gap for 2.5mm, is protected during MOLTEN STEEL FLOW using the mixed gas of argon gas and hydrogen, wherein argon gas and hydrogen
The volume ratio of gas is 3: 1, and protective gas pressure 0.3MPa, the made-up belt thickness obtained after casting is 2.5mm, and molten steel is in Casting Roller
In process of setting, cooldown rate control range is 500 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet is in the mixed gas protected lower carry out hot rolling of argon gas and hydrogen, wherein argon gas and hydrogen
Volume ratio is 3: 1, protective gas pressure 0.3MPa.Made-up belt is sent to hot-rolling mill through pinch roll and carries out constant-tension rolling, mill speed
139 m/min, 1100 DEG C of made-up belt hot-rolled temperature, belt steel thickness is 1.8mm after made-up belt hot rolling；
（5）The cooling and excision of strip are end to end
When temperature is cooled to 620 DEG C for 910 DEG C of strip through cooling facility for laminar flow after hot rolling, then it is sent to cutter through pinch roll and enters
The excision of row strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
Embodiment 3
A kind of thickness 3.6mm, steel grade 904L super austenitic stainless steel double roll strip casting rolling production process comprise the following steps：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super austenitic stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 20min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 15min is driven out of molten steel in bag after air by long nozzle from ladle
It is injected into tundish, the degree of superheat is controlled at 30 DEG C, is added above molten steel for being incubated and adsorbing the tundish covering flux being mingled with；
（3）Double-roller rolling：Molten steel is injected into twin-roll cast-rolling mill by submersed nozzle, and strand speed is 80m/min, Casting Roller
Default roll gap is 4.5mm.Protected during MOLTEN STEEL FLOW using argon gas, protective gas pressure 0.5MPa is obtained after casting
Made-up belt thickness be 4.5mm, molten steel is in Casting Roller in process of setting, and cooldown rate is 300 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet carries out hot rolling, protective gas pressure 0.5MPa under argon gas protection.Made-up belt is through pinch roll
It is sent to hot-rolling mill and carries out constant-tension rolling, the m/min of mill speed 100,1050 DEG C of made-up belt hot-rolled temperature, strip after made-up belt hot rolling
Thickness is 3.6mm；
（5）The cooling and excision of strip are end to end
When temperature is cooled to 600 DEG C for 900 DEG C of strip through cooling facility for laminar flow after hot rolling, then it is sent to cutter through pinch roll and enters
The excision of row strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
Claims (6)
1. a kind of super austenitic stainless steel double roll strip casting rolling production process, it is characterised in that comprise the following steps that：
（1）The qualified molten steel of composition is hoisted to bale panoramic tables：Super austenitic stainless steel after LF ladle refining furnaces are refined
Molten steel is hoisted to bale panoramic tables, calm 15-25min；
（2）Molten steel is injected into tundish：Tundish blowing argon gas 10-20min drive out of in bag after air by long nozzle by molten steel from
Ladle is injected into tundish, and degree of superheat control is added on 20 DEG C -40 DEG C, molten steel for being incubated and adsorbing the centre being mingled with
Covering agent；；
（3）Double-roller rolling：Molten steel is injected in twin-roll cast-rolling mill by submersed nozzle, and strand speed is 80-120 m/min, casting
Roller gap is adjustable between 1.5-4.5mm, is carried out during MOLTEN STEEL FLOW using the mixed gas of argon gas or argon gas and hydrogen
Protection, molten steel is in Casting Roller in process of setting, and cooldown rate control range is 300-700 DEG C/s；
（4）Made-up belt hot rolling：Roll casting sheet is in the mixed gas protected lower carry out hot rolling of argon gas or argon gas and hydrogen, protective gas pressure
Power 0.3-0.5MPa, made-up belt is sent to hot-rolling mill through pinch roll and carries out constant-tension rolling, and mill speed scope is 100-150 m/
Min, wherein made-up belt hot-rolled temperature control are 1050-1200 DEG C, and belt steel thickness control range is 1.2-3.6mm after made-up belt hot rolling；
（5）The cooling and excision of strip are end to end
Strip cooling after hot rolling, is sent to cutter through pinch roll and carries out the excision of strip end to end；
（6）Strip coiling
Strip after excision end to end is sent to coiling machine through pinch roll and carries out strip coiling, obtains finished product thin strip steel coil.
2. a kind of super austenitic stainless steel double roll strip casting rolling production process according to claim 1, it is characterised in that：
The step（3）Middle protective gas pressure is 0.3-0.5MPa.
3. a kind of super austenitic stainless steel double roll strip casting rolling production process according to claim 2, it is characterised in that：
The step（3）The volume ratio of middle argon gas and hydrogen is 3: 1.
4. a kind of super austenitic stainless steel double roll strip casting rolling production process according to claim 1, it is characterised in that：
The step（4）Middle protective gas pressure is 0.3-0.5MPa.
5. a kind of super austenitic stainless steel double roll strip casting rolling production process according to claim 4, it is characterised in that：
The step（4）The volume ratio of middle argon gas and hydrogen is 3: 1.
6. a kind of super austenitic stainless steel double roll strip casting rolling production process according to claim 3 or 5, its feature exists
In：The step（5）Strip after middle hot rolling is cooled to 600-650 DEG C through cooling facility for laminar flow.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359909A (en) * | 2018-05-25 | 2018-08-03 | 江苏集萃冶金技术研究院有限公司 | High tough martensite steel method is prepared by thin-belt casting rolling and aging technique |
| CN108611565A (en) * | 2018-05-25 | 2018-10-02 | 江苏集萃冶金技术研究院有限公司 | The method that dual-roller thin-belt casting rolling and aging technique prepare high-strength low alloy steel |
| CN111389914A (en) * | 2020-03-02 | 2020-07-10 | 北京鼎新时代科技有限公司 | Novel production method of super austenite 904L stainless steel plate strip |
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| CN102039309A (en) * | 2009-10-23 | 2011-05-04 | 宝山钢铁股份有限公司 | Twin-roller double-strip composite-structured thin strip continuous casting and rolling method |
| CN104105805A (en) * | 2011-12-28 | 2014-10-15 | Posco公司 | High strength austenitic stainless steel, and preparation method thereof |
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| CN108359909A (en) * | 2018-05-25 | 2018-08-03 | 江苏集萃冶金技术研究院有限公司 | High tough martensite steel method is prepared by thin-belt casting rolling and aging technique |
| CN108611565A (en) * | 2018-05-25 | 2018-10-02 | 江苏集萃冶金技术研究院有限公司 | The method that dual-roller thin-belt casting rolling and aging technique prepare high-strength low alloy steel |
| CN111389914A (en) * | 2020-03-02 | 2020-07-10 | 北京鼎新时代科技有限公司 | Novel production method of super austenite 904L stainless steel plate strip |
| CN111389914B (en) * | 2020-03-02 | 2022-03-25 | 北京鼎新时代科技有限公司 | Production method of super austenite 904L stainless steel plate strip |
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