CN106435129A - Ferrite stainless steel with good toughness and good corrosion resistance, and manufacturing method thereof - Google Patents
Ferrite stainless steel with good toughness and good corrosion resistance, and manufacturing method thereof Download PDFInfo
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- CN106435129A CN106435129A CN201610506651.7A CN201610506651A CN106435129A CN 106435129 A CN106435129 A CN 106435129A CN 201610506651 A CN201610506651 A CN 201610506651A CN 106435129 A CN106435129 A CN 106435129A
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- 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
- 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
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0273—Final recrystallisation annealing
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C21D2211/005—Ferrite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a ferrite stainless steel with good toughness and good corrosion resistance, and a manufacturing method thereof. The ferrite stainless steel comprises, by weight, 0.002-0.02% of C, 0.002-0.02% of N, 0.05-0.60% of Si, 0.05-0.60% of Mn, 19.0-24.0% of Cr, 2.0-4.0% of Ni, 0.01-0.10% of Zr, 0.1-0.7% (0.1 inclusive and 0.7 inclusive) of Nb + Ti + Zr, 0.4% or less of Ti, and the balance of Fe and inevitable impurities. The ferrite stainless steel ha good room temperature toughness and good sulfuric acid corrosion resistance, the room toughness of the ferrite stainless steel is 70 J or above, and the sulfuric acid corrosion resistance weight loss is less than 1.0 [mu]g/mm<2>h.
Description
Technical field
The present invention relates to ferritic stainless steel and its manufacture method, particularly to the iron of a kind of excellent toughness and corrosion resistance
Ferritic stainless steel and its manufacture method.
Background technology
Ferritic stainless steel does not contain or containing only a small amount of nickel, and cost is relatively low, has good stamping formabilily concurrently, therefore simultaneously
It is widely used in the various aspects of the daily lifes such as building, household electrical appliance, kitchen product, automobile exhaust system.But, phase
For 304 austenitic stainless steels, there is typical face-centred cubic structure, ferritic stainless steel has body-centered cubic crystal structure, this
Kind of characteristic determine its necessarily occur cold short.The ductile-brittle transition temperature of common ferritic stainless steel is except low chromium type is all in room temperature
More than, and the increase with thickness, its Toughness significantly deteriorates, and also significantly limit ferritic stainless steel in industry neck
The application in domain.It is therefore desirable to carrying out related technological innovation to make the especially middle high chromium content ferrite stainless steel of ferritic stainless steel
There is good Toughness.Meanwhile, ferritic stainless steel passes through to increase chromium and the content of molybdenum can be obviously improved the resistance to of material
Spot corrosion performance, and up to or over 304 stainless steels, but in terms of sulfuric acid corrosion resistant, still to be inferior to 304 stainless steels.
Chinese patent CN200610117444.9 focuses on and improves ferritic stainless steel by the optimization of alloying component
Impact flexibility, Main Means, in smelting process, by controlling the oxygen content in steel, and add appropriate rare earth element, and then
Obtain high impact flexibility.
Chinese patent CN200780016464.X by compound add Mo, Ni and Al obtain good formability and resistance between
Gap corrosive nature, has concurrently set suitable Al/Nb than taking into account the resistance to spot corrosion performance of ferritic stainless steel；
Chinese patent CN201210123268.5 is it is important that centering chrome ferritic stainless steel is using conventional hot rolling+secondary warm-rolling
Technique, accumulative drafts 40～80%, and then make its tissue substantially refinement so that ductile-brittle transition temperature reduces by 20～40
DEG C, toughness significantly improves.
On the basis of the tangible high chromium content ferrite stainless steel of Chinese patent CN00104354.4 compound with the addition of Mo, Nb, Ti and
Al, emphasis is applied in decorative exterior wall, is limited to less than 1 μm to the oxide of Al simultaneously, the precipitate of Ti and N control 2 μm with
Under, improve the decay resistance of material by chromium high molybdenum high.
Chinese patent CN201310130483.2 ibid patent be similar to, also for chromium high molybdenum high ferritic stainless steel, by Ni,
Mo, Nb and Ti are combined in the stainless steel being added to containing chromium 25-28%, obtain high decay resistance and low-temperature flexibility.
Chinese patent CN200780048689.3 mainly passes through the selective conditions in Ca, Mg and Zr alloying component, refinement
The tissue of heat affected area after TIG weld, and then reduce impact transition temperature (DBTT), thus obtaining good toughness.
Chinese patent CN97103038.3 it is important that high chromium nickeliferous ferritic stainless steel containing molybdenum, by highly corrosion resistant element
Add and to improve stainless intergranular corrosion resistance and spot corrosion, in technique, emphasis is carried out using being cooled fast to 550 DEG C after hot rolling
Curling, obtains good toughness.
Above-mentioned patent emphasis is optimized from alloying component and hot rolling technology, thus improving the toughness of material, especially
Toughness, is not involved with the Toughness to ferritic stainless steel for the Ni element；In addition, above-mentioned Patents are to ferrite not
The research of rust steel corrosion resistance also focuses on resistance to spot corrosion and the crevice corrosion aspect of routine, is not involved with corrosion resistance against sulfuric acid
The research of energy.
Content of the invention
Present invention aim at the ferritic stainless steel of a kind of excellent toughness of offer and corrosion resistance and its manufacture method, should
Ferritic stainless steel has good Toughness and sulfuric acid corrosion resistant, and, in more than 70J, sulfuric acid corrosion resistant weightlessness is little for its Toughness
In 1.0 μ g/mm2h.
For reaching above-mentioned purpose, the technical scheme is that：
A kind of excellent toughness and the ferritic stainless steel of corrosion resistance, its composition by weight percent is：C：0.002%～
0.02%, N：0.002%～0.02%, Si：0.05%～0.60%, Mn：0.05%～0.60%, Cr：19.0%～
24.0%, Ni：2.0%～4.0%, Zr：0.01%～0.10%, 0.1%≤Nb+Ti+Zr≤0.7%, and, Ti≤0.4%,
Remaining is Fe and inevitable impurity.
In more than 70J, sulfuric acid corrosion resistant is weightless to be less than 1.0 μ g/mm to ferritic stainless steel Toughness of the present invention2h.
In the composition design of steel of the present invention：
C：A lot of shortcomings on ferrite stainless Steel Properties, for example：Ductile-brittle transition temperature is high, and notch sensitivity is big, anti-corrosion
Property difference all relevant with the carbon in steel.Therefore, in order to improve toughness and decay resistance, therefore it is required that its content is more few better, institute
It is set as 0.02% with its upper limit, but, the carbon wanting to remove completely in steel needs the extra difficulty increasing and smelting, manufacturing cost
Also can dramatically increase, therefore its lower limit is set to 0.002%.
N：It is the same with C, can lead to the decline of stainless steel formability and corrosion resistance, therefore its content be also more few more
Good, so its upper limit is set to 0.02%, but excessive reduction can lead to the fall of TiN particle during ferritic stainless steel solidification
Low, thus leading to the increase of column crystal content, stainless crystallite dimension can be roughened, considering the cost smelted, its lower limit simultaneously
It is set as 0.002%.
Si：Solution strengthening element, the increase of its content can lead to the decline of elongation percentage and toughness, and its content is more few better,
Its upper limit is set as 0.6%, but Si is added as deoxidant element sometimes, simultaneously takes account of smelting cost, its lower limit set
For 0.05%.
Mn：Weak austenite former, is also solution strengthening element simultaneously, can suppress the illeffects of sulphur in steel,
But its content increase can deteriorate corrosive nature, therefore its content needs to control below 0.6%.
Cr：Be to ensure that the most important element of stainless steel decay resistance, ferritic structure also can be made stable simultaneously it is contemplated that
The decay resistance of the ferritic steel of the present invention to be made reaches 304 levels, and its lower limit set is 19%, and its content is higher,
Anticorrosion stress-resistant in chloride solution, spot corrosion and crevice corrosion behavior are better, but the increase of its content can lead to toughness again
With the reduction of processability, the upper limit is set as 23%.
Ni：In conventional ferritic stainless steel, nickel content is few, but in the present invention, Ni enters as important element
Row adds, and on the one hand can effectively improve the corrosive nature of resistance to sulfuric acid, and can reduce the development speed after corrosion occurs；Low
The middle high chromium content ferrite stainless steel of carbon nitrogen is single ferrite in whole temperature range, and Ni is as austenite former,
Content be properly added the content that can expand stainless iron high temperature austenite, and make full use of the hot fine rolling stage
Dynamic recrystallization, promote ferritic stainless steel crystal grain refinement, and then be conducive to the Toughness of ferritic stainless steel, extension
It therefore sets its lower limit as 2.5% in the application in industrial plate field.But when Ni content more, stress corrosion cracking (SCC) quick
Perception increases, simultaneously because carrying out hot rolling in high temperature two-phase interval, increases the side in nickeliferous ferrite stainless steel mill process
Split risk, forming property can be deteriorated simultaneously.Furthermore, it is contemplated that the addition of nickel significantly increases cost, so its upper limit is set
For 4.0%.
Ti、Nb、Zr：It is ferrite former, appropriate titanium and niobium can make the carbon of chromium, nitride in stainless steel transfer
Formed titanium, niobium carbon, nitride, and the stainless crystal grain of fining ferrite, improve the intergranular corrosion resistance of ferritic stainless steel
Performance.In steel, appropriate titanium and nitrogen, moreover it is possible to fining ferrite seam organization, improve plastic property of weld bead and formability.According to atomic number
Number proportioning, the nitrogen in fixing steel at least needs 3.4 times of titanium, simultaneously takes account of in steel and also has other impurity P and S, needs in addition
Add titanium, but the titanium of excess adds the decline being easily caused lumber recovery, set and be limited to 0.4% thereon.Niobium is except in stabilized steel
Interstitial atom carbon nitrogen outside, the NbC of solid solution state Nb and generation has significant effect of dragging, crystal grain thinning to crystal boundary, contributes to carrying
High stainless toughness, additionally, the effect of Zr is similar with Nb with Ti, can contribute to ferrite not with notable fixed interval (FI) atom
Rust steel forming property and the lifting of toughness, but it is expensive, and application is less, sets 0.1%≤Nb+Ti+Zr≤0.7%,
And, Ti≤0.4%, 0.01%≤Zr≤0.10%.
The manufacture method of the ferritic stainless steel of the excellent toughness of the present invention and corrosion resistance, is characterized in that：Including as follows
Step：
1) steel billet containing mentioned component or continuous casting billet are heated at 1150 DEG C～1250 DEG C, temperature retention time according to (0.8～
1.2) T/min controls, and T represents steel billet or thickness of strand, mm；
2) through the reversible rolling of multi-pass, finishing temperature below 850 DEG C, the steel plate thickness after rolling controls 3～
12mm；
3) carry out recrystallization annealing between 900 DEG C～1100 DEG C, annealing time controls according to (0.8～1.2) T/min, T generation
Table steel plate thickness, mm；Then air cooling is to room temperature.
In more than 70J, sulfuric acid corrosion resistant is weightless to be less than 1.0 μ g/mm to ferritic stainless steel Toughness of the present invention2h.
Heterogeneity steel billet or continuous casting billet are put into heating furnace, heating-up temperature is set between 1150 DEG C～1250 DEG C, warp
Cross multi- pass rolling thick to 3～12mm.Because hot conditions are the duplex structure of ferrite+austenite, passage pressure is rationally set
Lower distribution prevents surface defect and side from splitting, and controls finishing temperature below 850 DEG C, and the reduction of finishing temperature is conducive to deformation to store up
The increase of energy, promotes recrystallization, the crystal grain thinning of hot rolled plate, is conducive to toughness to improve.Then by the plate after hot rolling at 900 DEG C
～1100 DEG C carry out recrystallization softening annealing, obtain completely recrystallized structure, and annealing model carries out impact and the resistant to sulfur of correlation
Acid corrosion is evaluated.
Steel of the present invention is obtained the standard " V " shape impact specimen of a size of 5mm × 10mm × 55mm through machining, in room
Carry out Charpy impact experiment, the ballistic work (J) of material under test heterogeneity and process conditions at 20 DEG C of temperature.Meanwhile, according to GB/
T 4334.6-2000 stainless steel 5% sulfuric acid corrosion test method carries out 6h immersion test to experiment steel grade, carries out general corrosion resistance
Evaluation.
Beneficial effects of the present invention：
The reasonable interpolation by Nb, Ti, Zr and Ni alloying element for the present invention, and it is aided with the optimization of metallurgical technology system, no
Improve only the Toughness of ferritic stainless steel, higher corrosion resistance to sulfuric acid can also be obtained, expand iron element further
The stainless range of application of body.
Specific embodiment
With reference to embodiment, the present invention will be further described.
Table 1 is the composition of steel embodiment of the present invention and comparative example, and table 2, table 3 show steel embodiment of the present invention and comparative example
Performance.
As can be seen that for the middle chrome ferritic stainless steel (chromium content is between 19.0%～24.0%) of low-carbon and nitrogen, with
The increase (comparative example 1 and comparative example 2) of Ni content, after that is, Ni content increases to 1.5% from 0.5%, its corrosion resistance to sulfuric acid
Increase, corrosion weight loss rate is reduced to 198 μ g by 245 μ g, and decay resistance is still relatively low, is not belonging to protection scope of the present invention.
When Ni content increases to more than 2.0% (embodiment 1), even if its chromium content is less than comparative example 1,2, but its resistant to sulfur
Sour homogeneous corrosion performance dramatically increases, and corrosion weight loss rate reaches 0.23 μ g, and its corrosion weight loss rate differs 1000 times with comparative example 1；
Then increase to 2.3% (embodiment 2) with nickel content, the homogeneous corrosion performance of its resistance to sulfuric acid is also gradually increased；Work as nickel content
When increasing to more than 3.0%, its corrosion weight loss rate is further decreased to 0.06%, 0.04%, 0.03% (embodiment 3,4,5).
Illustrate to increase to more than 2.0% when nickel content, the homogeneous corrosion performance of its resistance to sulfuric acid obtains lifting drastically, but works as nickel content
It is further increased to more than 4.0%, the toughness of meeting significantly deterioration material, and increase the production cost of ferritic stainless steel, so
Nickel content is not belonging to the present invention more than 4.0%.
Although the one-tenth of embodiment 1 belongs to the present invention in the enforcement of hot-roll annealing system, but when annealing temperature is
When 880 DEG C (less than 900 DEG C), the tissue after its annealing is not carried out completely recrystallizing, still for the rolled fiber of rolled
Structure, is unfavorable for the improvement of Toughness, and its impact flexibility only has 35J, is not belonging to the present invention；When annealing temperature increases to 930
DEG C and 980 DEG C, impact flexibility reaches 89J and 96J；The heating cycle of embodiment 2,3 and annealing schedule meet the present invention, so
Its room temperature impact toughness is good, belongs to the present invention.
In example 4, when annealing temperature is less than 1100 DEG C, impact property is respectively 86J, 99J, 105J (annealing temperature
It is respectively 980 DEG C, 1030 DEG C, 1080 DEG C), room temperature impact is functional, belongs to the present invention；But annealing temperature increases further
To after 1130 DEG C, ferrite grain size dramatically increases, so its toughness is decreased obviously, its impact flexibility only has 32J, is not belonging to
The present invention.For the comparative example 1 and 2 that composition is not belonging to the present invention, even if its heating cycle and annealing schedule belong to this
Bright protection domain, Toughness is still relatively low, is not belonging to the present invention.
Table 1 chemical composition (wt%)
| Numbering | C | Si | Mn | Cr | N | Ni | Nb | Ti | Zr | Ti+Nb+Zr |
| Embodiment 1 | 0.015 | 0.14 | 0.36 | 19.5 | 0.009 | 2.1 | 0.23 | 0.15 | 0.02 | 0.40 |
| Embodiment 2 | 0.006 | 0.56 | 0.16 | 20.9 | 0.008 | 2.3 | 0.01 | 0.14 | 0.09 | 0.24 |
| Embodiment 3 | 0.004 | 0.23 | 0.53 | 21.5 | 0.016 | 3.8 | 0.13 | 0.33 | 0.03 | 0.49 |
| Embodiment 4 | 0.010 | 0.42 | 0.09 | 22.6 | 0.009 | 3.2 | 0.45 | 0.12 | 0.08 | 0.65 |
| Embodiment 5 | 0.017 | 0.08 | 0.22 | 23.6 | 0.004 | 3.5 | 0.15 | 0.12 | 0.09 | 0.36 |
| Comparative example 1 | 0.013 | 0.21 | 0.34 | 21.3 | 0.009 | 0.5 | 0.21 | 0.17 | 0.01 | 0.39 |
| Comparative example 2 | 0.008 | 0.30 | 0.19 | 20.4 | 0.012 | 1.5 | 0.08 | 0.12 | 0.01 | 0.21 |
Table 2 sulfuric acid corrosion resistant is weightless
| Numbering | Weight-loss ratio (μ g/mm2·h) |
| Embodiment 1 | 0.23 |
| Embodiment 2 | 0.12 |
| Embodiment 3 | 0.06 |
| Embodiment 4 | 0.04 |
| Embodiment 5 | 0.03 |
| Comparative example 1 | 245 |
| Comparative example 2 | 198 |
| 304 | 167 |
Table 3 room temperature (20 DEG C) impact flexibility
Claims (4)
1. the ferritic stainless steel of a kind of excellent toughness and corrosion resistance, its composition by weight percent is：C：0.002%～
0.02%, N：0.002%～0.02%, Si：0.05%～0.60%, Mn：0.05%～0.60%, Cr：19.0%～
24.0%, Ni：2.0%～4.0%, Zr：0.01%～0.10%, 0.1%≤Nb+Ti+Zr≤0.7%, and, Ti≤0.4%,
Remaining is Fe and inevitable impurity.
2. the ferritic stainless steel of excellent toughness as claimed in claim 1 and corrosion resistance, is characterized in that, described ferrite is not
In more than 70J, sulfuric acid corrosion resistant is weightless to be less than 1.0 μ g/mm to rust steel Toughness2h.
3. the manufacture method of the ferritic stainless steel of excellent toughness as claimed in claim 1 or 2 and corrosion resistance, its feature
It is：Comprise the steps：
1) steel billet containing mentioned component or continuous casting billet are heated at 1150 DEG C～1250 DEG C, temperature retention time is according to (0.8～1.2) T/
Min controls, and T represents steel billet or thickness of strand, mm；
2) through the reversible rolling of multi-pass, below 850 DEG C, the steel plate thickness after rolling controls in 3～12mm finishing temperature；
3) carry out recrystallization annealing between 900 DEG C～1100 DEG C, annealing time controls according to (0.8～1.2) T/min, T represents steel
Plate thickness, mm；Then air cooling is to room temperature.
4. the manufacture method of the ferritic stainless steel of excellent toughness as claimed in claim 3 and corrosion resistance, is characterized in that：Institute
State ferritic stainless steel Toughness in more than 70J, sulfuric acid corrosion resistant is weightless to be less than 1.0 μ g/mm2h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136735A (en) * | 2017-06-27 | 2019-01-04 | 宝钢不锈钢有限公司 | Ferritic stainless steel and its manufacturing method with favorable forming property |
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| CN103160753A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Zr-containing sulfuric acid dew point corrosion resistant steel plate and manufacturing method thereof |
| CN104120356A (en) * | 2014-06-25 | 2014-10-29 | 宝钢不锈钢有限公司 | Ferritic stainless steel for tubular heat exchangers and manufacturing method thereof |
| CN105506502A (en) * | 2014-09-25 | 2016-04-20 | 宝钢不锈钢有限公司 | Sulfuric acid resistant ferritic stainless steel and manufacturing method thereof |
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2016
- 2016-06-30 CN CN201610506651.7A patent/CN106435129B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0042180A1 (en) * | 1980-06-17 | 1981-12-23 | Kabushiki Kaisha Toshiba | A high cavitation erosion resistance stainless steel and hydraulic machines being made of the same |
| CN1507500A (en) * | 2001-05-10 | 2004-06-23 | 日新制钢株式会社 | Ferritic stainless steel strip excellent in freeze of shape formed by working |
| CN103160753A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Zr-containing sulfuric acid dew point corrosion resistant steel plate and manufacturing method thereof |
| CN104120356A (en) * | 2014-06-25 | 2014-10-29 | 宝钢不锈钢有限公司 | Ferritic stainless steel for tubular heat exchangers and manufacturing method thereof |
| CN105506502A (en) * | 2014-09-25 | 2016-04-20 | 宝钢不锈钢有限公司 | Sulfuric acid resistant ferritic stainless steel and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136735A (en) * | 2017-06-27 | 2019-01-04 | 宝钢不锈钢有限公司 | Ferritic stainless steel and its manufacturing method with favorable forming property |
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