CN110257720A - A kind of production technology for exempting from annealing stainless steel materials - Google Patents
A kind of production technology for exempting from annealing stainless steel materials Download PDFInfo
- Publication number
- CN110257720A CN110257720A CN201910540822.1A CN201910540822A CN110257720A CN 110257720 A CN110257720 A CN 110257720A CN 201910540822 A CN201910540822 A CN 201910540822A CN 110257720 A CN110257720 A CN 110257720A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- exempting
- annealing
- steel materials
- rolling
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
Abstract
The invention discloses a kind of production technologies for exempting from annealing stainless steel materials, its main feature is that including the following steps: to obtain slab by electric furnace → steel-making → continuous casting；Heating of plate blank is rolled to 1150 DEG C~1250 DEG C by heating furnace, temperature is 1000 DEG C~1100 DEG C when rolling, after rolling plate, and excessively air-cooled mode is cooled to room temperature；Pickling processes are carried out to plate, obtain exempting from plate of annealing.The beneficial effects of the invention are as follows austenitic stainless steel is suitable for, homogenize tissue in the hot rolling by adjusting rolling technological parameter, internal stress, which obtains adequately replying, to be reached and same purpose of annealing；Production time and production cost can be greatly shortened in process flow.
Description
Technical field
The invention belongs to stainless steel production technical field more particularly to a kind of production technologies for exempting from annealing stainless steel materials.
Background technique
In the prior art, stainless steel materials production technology is generally steel → hot rolling → annealing → pickling processed, passes through the technique
Available tissue and all good plate of performance；Tissue change in the general operation of rolling be as-cast structure → feather organization and
Nonuniform organization；The main purpose annealed in plank stuff production technology is to improve metallographic structure, and removal rolling internal stress improves plate
Processing performance.But the process flow of annealing steps is complicated in the prior art, the production time is long, high production cost.
Summary of the invention
In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a kind of production works for exempting from annealing stainless steel materials
Skill, by the change of rolling technological parameter, so that tissue is homogenized during the rolling process, internal stress is adequately returned
It is multiple, tissue and performance and the comparable plate of traditional handicraft are obtained, production time and production cost are greatly shortened.
To achieve the above object, the present invention adopts the following technical scheme:
It is a kind of exempt from anneal stainless steel materials production technology, its main feature is that include the following steps: by electric furnace → steel-making →
Continuous casting obtains slab；Heating of plate blank is rolled to 1150 DEG C~1250 DEG C by heating furnace, temperature is 1000 during rolling
DEG C~1100 DEG C, the plate of 20~50mm thickness is obtained after 7 passes, is cooled to room temperature by air-cooled mode；To rolling
Plate afterwards carries out pickling processes, obtains exempting from stainless steel materials of annealing；The plate that above-mentioned steps are obtained carries out relevant materials
It can detection.
Further, the finishing temperature of the milling step is 1000~1050 DEG C.
Further, the air-cooled speed is 20 DEG C/s~1 DEG C/s.
Further, the air-cooled speed is 1 DEG C/s.
Further, the stainless steel is austenitic stainless steel, and the austenitic stainless steel is 304 stainless steels；With weight
Percentage composition meter, 304 stainless steels include following chemical component: C :≤0.07；Mn≤2.0；P :≤0.045；S :≤0.003；Si:
≤0.75；Cr:17.5~19.5；Ni:8.0~10.5；N≤0.1；Surplus is Fe and other inevitable impurity elements.
The principle analysis that the present invention obtains exempting to anneal stainless steel materials is as follows: 1. rolling temperature controls of the present invention are at 1000 DEG C
More than, can achieve the effect annealed during the rolling process, guarantee the available effective reply of crystal grain during the rolling process and
Recrystallization, when rolling temperature is processing hardening type in 1000 DEG C or less as-rolled conditions, crystal grain can not be replied and be recrystallized；2.
Invention uses air-cooled mode, and cooling rate is 20 DEG C/s~1 DEG C/s, and tissue can be made adequately to be replied and be recrystallized, gram
The traditional type of cooling of clothes is because cooling velocity is too fast, the defect for making tissue adequately cannot reply and recrystallize.
Compared with prior art, the beneficial effects of the present invention are:
1. the present invention is by the change of rolling technological parameter, tissue change is as-cast structure → isometric group during the rolling process
It knits and even tissue；And the tissue change in traditional operation of rolling is as-cast structure → feather organization and nonuniform organization, therefore
The present invention organizes to be homogenized during the rolling process, and internal stress obtains adequately replying to reach and traditional handicraft annealing steps
Same purpose；
2. the present invention obtains tissue and performance and the comparable stainless steel materials of traditional handicraft, made by the adjustment of processing step
The production time greatly shortens and production cost substantially reduces；
3. the present invention is suitable for austenitic stainless steel, during the rolling process, there is reply and tie again for austenitic stainless steel
Brilliant process, is single austenite structure since austenitic stainless steel warms to room temperature (room temperature) all in height, tissue will not be with temperature
The variation of degree and undergo phase transition, the tissue that the present invention must homogenize by adjusting rolling technological parameter, to obtain exempting from annealing not
Become rusty steel board.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is the stainless steel materials hot rolling microstructure figure of prior art production technology production.
Fig. 2 is the stainless steel materials intergranular corrosion resistance figure of prior art production technology production.
Fig. 3 is that stainless steel materials hot rolling microstructure figure of annealing is exempted from production technology of the present invention production.
Fig. 4 is that stainless steel intergranular corrosion resistance figure of annealing is exempted from production technology of the present invention production.
Fig. 5 is austenitic stainless steel thermal modeling test data.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Embodiment
Exempt from stainless steel materials of annealing, preparation process includes the following steps:
1. obtaining the slab of 220mm thickness by electric furnace → steel-making → continuous casting；
2. heating of plate blank is rolled to 1150 DEG C~1250 DEG C by heating furnace, during rolling temperature be 1000 DEG C~
1100 DEG C, the finishing temperature of milling step is 1000~1050 DEG C, the plate after 20~50mm is obtained after 7 passes,
And it is cooled to room temperature by air-cooled mode；Air-cooled speed is 1 DEG C/s；
3. the plate after pair rolling carries out pickling processes, contains nitric acid, hydrofluoric acid in pickling solution, obtain the plate of surface-brightening
Material；
4. the plate that step 3 is obtained carries out relevant materials performance detection.
Comparative example
According to prior art processes step, carries out stainless steel materials and produced, rolling temperature is controlled 950~1100
DEG C, stainless steel materials finishing temperature is 950~1000 DEG C, type of cooling water cooling, and cooling rate is 20 DEG C/s.
The plate that embodiment is obtained with comparative example is compared, Fig. 1 is obtained: prior art production technology produces stainless
Steel board hot rolling microstructure figure is the metallographic microscope of rolling mill practice before improving；Fig. 3: the stainless steel materials heat of production technology production of the present invention
Metallographic microscope after rolling organization chart i.e. rolling mill practice improvement；It can be seen from Fig. 1 that occurring more twin group in traditional rolling mill practice
It knits, this is the tissue generated in rolling deformation, and such as without annealing process, the intensity and toughness of material are unable to satisfy use and want
It asks；After rolling mill practice improves, as seen from Figure 3, the crystal grain after rolling mill practice improves is replied preferably, no feather organization,
Preferable isometric form is presented in crystal grain.
Embodiment and comparative example are subjected to performance comparative evaluation:
1, material capability is evaluated
| Technique | YS(Rp0.2) | TS | EL | HRB |
| Technological datum | ≥220 | ≥520 | ≥40 | ≤92 |
| The prior art (comparative example) | 316 | 745 | 56 | 90 |
| Embodiment | 235 | 677 | 66 | 80 |
2, Evaluation of Corrosion Resistance
An important factor for influencing stainless steel material resistance to intergranular corrosion is that the C compound of Cr is precipitated in crystal boundary, generates crystal boundary
Cr-depleted region.
The present invention mainly uses 10% oxalic acid electrolytic etching to carry out correlated performance evaluation, evaluation effect such as Fig. 2, Fig. 4 institute
Show: Fig. 2: the resistance to intergranular of the i.e. normal rolling+water cooling of stainless steel materials intergranular corrosion resistance figure of prior art production technology production is rotten
Corrosion figure, Fig. 4: the intergranular corrosion resistance figure of stainless steel intergranular corrosion resistance figure, that is, temperature-controlled rolling of production technology of the present invention production+air-cooled；
Find out from figure, step-like, no obvious intercrystalline attack tendency, hence it is demonstrated that using real is all presented in the plate crystal boundary that embodiment obtains
The C compound that the processing step and parameter for applying example not will lead to Cr is precipitated in crystal boundary, and crystal boundary is generated without Cr-depleted region, the resistance to intergranular of material
Corrosivity does not reduce.
Traditional rolling temperature is controlled at 950~1100 DEG C, and rolling temperature range is wider；As shown in figure 5, according to Ovshinsky
It is found that when rolling temperature is controlled at 1050 DEG C, crystal grain is presented dynamic recrystallization and returns the thermal modeling test data of body stainless steel
Multiple state.
The method that the present invention passes through fast speed rolling, it is ensured that rolling temperature controls in the range of 1000~1100 DEG C.
Further explanation for the recrystallization and reply that are rolled at a temperature of 1000~1100 DEG C, after traditional handicraft rolling
Annealing the purpose of be eliminate residual stress, crystal grain is replied, Solid solution precipitation is mutually to obtaining all preferable product of intensity and toughness；By
In the present invention by the control of rolling mill practice, portion crystal reply can be carried out during the rolling process, reached and traditional handicraft
It anneals same technical effect；The present invention is further begun to cool by higher temperature, is conducive to crystal grain and is further replied, choosing
The air-cooled type of cooling is selected, more traditional water-cooling pattern, cooling rate is slower, can effectively carry out crystal grain reply.
The merely exemplary principles and effects for illustrating the invention of the above embodiments, and the implementation that part uses
Example, and is not intended to limit the present invention；It should be pointed out that for those of ordinary skill in the art, not departing from wound of the present invention
Under the premise of making design, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (7)
1. it is a kind of exempt from anneal stainless steel materials production technology, characterized by the following steps: by electric furnace → steel-making →
Continuous casting obtains slab；Heating of plate blank is rolled to 1150 DEG C~1250 DEG C by heating furnace, temperature is 1000 DEG C when rolling
~1100 DEG C, the plate of 20~50mm thickness is obtained after 7 passes, is cooled to room temperature by air-cooled mode；After rolling
Plate carry out pickling processes, obtain exempting from stainless steel materials of annealing.
2. a kind of production technology for exempting from annealing stainless steel materials according to claim 1, it is characterised in that: the milling step
Finishing temperature be 1000~1050 DEG C.
3. a kind of production technology for exempting from annealing stainless steel materials according to claim 1 or claim 2, it is characterised in that: described air-cooled
Speed be 20 DEG C/s~1 DEG C/s.
4. a kind of production technology for exempting from annealing stainless steel materials according to claim 1 or claim 2, it is characterised in that: described air-cooled
Speed be 1 DEG C/s.
5. a kind of production technology for stainless steel materials of exempting to anneal according to claim 1, it is characterised in that: the stainless steel is
Austenitic stainless steel.
6. a kind of production technology for exempting from annealing stainless steel materials according to claim 5, it is characterised in that: the austenite is not
Rust steel is 304 stainless steels.
7. a kind of production technology for exempting from annealing stainless steel materials according to claim 6, it is characterised in that: contained with weight percent
Meter, 304 stainless steels include following chemical component: C :≤0.07；Mn≤2.0；P :≤0.045；S :≤0.003；Si :≤
0.75；Cr:17.5~19.5；Ni:8.0~10.5；N≤0.1；Surplus is Fe and other inevitable impurity elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910540822.1A CN110257720A (en) | 2019-06-21 | 2019-06-21 | A kind of production technology for exempting from annealing stainless steel materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910540822.1A CN110257720A (en) | 2019-06-21 | 2019-06-21 | A kind of production technology for exempting from annealing stainless steel materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110257720A true CN110257720A (en) | 2019-09-20 |
Family
ID=67920154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910540822.1A Pending CN110257720A (en) | 2019-06-21 | 2019-06-21 | A kind of production technology for exempting from annealing stainless steel materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110257720A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747407A (en) * | 2019-11-19 | 2020-02-04 | 浦项(张家港)不锈钢股份有限公司 | Austenitic stainless steel for preparing fork spoon and manufacturing method and application thereof |
| CN116657023A (en) * | 2023-05-31 | 2023-08-29 | 广东广青金属科技有限公司 | Preparation method of annealing-free austenitic stainless steel |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01132717A (en) * | 1987-11-17 | 1989-05-25 | Kawasaki Steel Corp | Production of high-strength austenitic stainless seamless steel pipe |
| CN101585046A (en) * | 2008-05-23 | 2009-11-25 | 宝山钢铁股份有限公司 | SUS304 stainless steel cold-rolled plate producing method omitting annealing before cold rolling |
| CN101892437A (en) * | 2009-05-22 | 2010-11-24 | 宝山钢铁股份有限公司 | Good-mirror polishability low-magnetic austenitic stainless steel and manufacturing method thereof |
| CN103191928A (en) * | 2013-04-10 | 2013-07-10 | 张家港浦项不锈钢有限公司 | 304 stainless steel strip and production method thereof |
| CN103710638A (en) * | 2013-12-27 | 2014-04-09 | 宝钢特钢有限公司 | Martensitic stainless steel and manufacturing method thereof |
| CN106282844A (en) * | 2016-08-31 | 2017-01-04 | 河北中泊防爆工具集团股份有限公司 | A kind of high-strength corrosion-resisting magnetism-free stainless steel instrument and preparation method thereof |
| CN106591741A (en) * | 2017-01-06 | 2017-04-26 | 山西太钢不锈钢股份有限公司 | Non-annealing rolling method for medium-chromium austenitic stainless steel |
| CN106583447A (en) * | 2015-10-19 | 2017-04-26 | 中冶东方工程技术有限公司秦皇岛研究设计院 | Method for rolling austenitic stainless steel belt by using steckel mill |
| CN108138281A (en) * | 2015-09-30 | 2018-06-08 | 新日铁住金株式会社 | Austenite stainless steel |
-
2019
- 2019-06-21 CN CN201910540822.1A patent/CN110257720A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01132717A (en) * | 1987-11-17 | 1989-05-25 | Kawasaki Steel Corp | Production of high-strength austenitic stainless seamless steel pipe |
| CN101585046A (en) * | 2008-05-23 | 2009-11-25 | 宝山钢铁股份有限公司 | SUS304 stainless steel cold-rolled plate producing method omitting annealing before cold rolling |
| CN101892437A (en) * | 2009-05-22 | 2010-11-24 | 宝山钢铁股份有限公司 | Good-mirror polishability low-magnetic austenitic stainless steel and manufacturing method thereof |
| CN103191928A (en) * | 2013-04-10 | 2013-07-10 | 张家港浦项不锈钢有限公司 | 304 stainless steel strip and production method thereof |
| CN103710638A (en) * | 2013-12-27 | 2014-04-09 | 宝钢特钢有限公司 | Martensitic stainless steel and manufacturing method thereof |
| CN108138281A (en) * | 2015-09-30 | 2018-06-08 | 新日铁住金株式会社 | Austenite stainless steel |
| CN106583447A (en) * | 2015-10-19 | 2017-04-26 | 中冶东方工程技术有限公司秦皇岛研究设计院 | Method for rolling austenitic stainless steel belt by using steckel mill |
| CN106282844A (en) * | 2016-08-31 | 2017-01-04 | 河北中泊防爆工具集团股份有限公司 | A kind of high-strength corrosion-resisting magnetism-free stainless steel instrument and preparation method thereof |
| CN106591741A (en) * | 2017-01-06 | 2017-04-26 | 山西太钢不锈钢股份有限公司 | Non-annealing rolling method for medium-chromium austenitic stainless steel |
Non-Patent Citations (1)
| Title |
|---|
| 阳辉等: "《轧钢厂设计原理》", 31 January 2011, 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747407A (en) * | 2019-11-19 | 2020-02-04 | 浦项(张家港)不锈钢股份有限公司 | Austenitic stainless steel for preparing fork spoon and manufacturing method and application thereof |
| CN116657023A (en) * | 2023-05-31 | 2023-08-29 | 广东广青金属科技有限公司 | Preparation method of annealing-free austenitic stainless steel |
| CN116657023B (en) * | 2023-05-31 | 2024-02-02 | 广东广青金属科技有限公司 | Preparation method of annealing-free austenitic stainless steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107254646B (en) | Improve the heat treatment method and aluminum alloy plate materials of 6000 line aluminium alloy natrual ageing stability | |
| US11401566B2 (en) | High strength and high toughness stainless steel and processing method thereof | |
| CN110295320A (en) | A kind of big wall thickness X52MS acid-resistant pipeline steel plate and its manufacturing method of the production of LF-RH refinery practice | |
| CN109778062B (en) | Cold-rolled complex phase steel with tensile strength of 1200MPa and preparation method thereof | |
| CN111558680B (en) | Manufacturing method of large-section F53 solid forging | |
| CN113564462B (en) | High-carbon austenitic stainless steel plate with uniform intergranular corrosion resistant structure and manufacturing method thereof | |
| CN108220812A (en) | A kind of super ferrite stainless steel of plasticity containing rare earth high-strength and preparation method thereof | |
| CN111621716B (en) | Nb-containing low alloy steel rolling process | |
| CN107893155B (en) | A method of eliminating phosphorous high-strength IF steel surface chromatic aberration defect | |
| CN110257720A (en) | A kind of production technology for exempting from annealing stainless steel materials | |
| JPS581012A (en) | Production of homogeneous steel | |
| CN114645194A (en) | Preparation method of high-corrosion-resistance ferritic stainless steel | |
| CN108441780B (en) | A kind of pre- duroplasts steel plate of die steel of Micro Alloying and its preparation process | |
| CN109694983A (en) | A kind of high mirror surface corrosion-resistant plastic mould steel and its manufacturing method | |
| CN106282847A (en) | A kind of remnant forging thermal quenching steel | |
| CN107267799B (en) | A kind of chrome zirconium copper alloy material and preparation method thereof | |
| JP2001342544A (en) | Wire or rod steel suppressed arising of deformation resistance at room temperature and in area of working heat generation | |
| CN106929772B (en) | A kind of Steel Bar and preparation method thereof and rod iron | |
| JPS58141331A (en) | Heat treatment of forging | |
| JP2000119806A (en) | Steel wire rod excellent in cold workability, and its manufacture | |
| JPH04173921A (en) | Production of steel wire rod or bar steel having spheroidized structure | |
| JP6095822B1 (en) | Martensitic stainless steel sheet and metal gasket manufacturing method | |
| CN112899445B (en) | Heat treatment method for super martensitic stainless steel medium plate | |
| CN115386803B (en) | Non-quenched and tempered steel for high-strength and high-toughness wind power bolts and production method thereof | |
| JPH02294450A (en) | Die steel for molding plastics and its manufacture |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190920 |
|
| RJ01 | Rejection of invention patent application after publication |