WO2021187706A1 - 고내식 마르텐사이트계 스테인리스강 및 그 제조방법 - Google Patents
고내식 마르텐사이트계 스테인리스강 및 그 제조방법 Download PDFInfo
- Publication number
- WO2021187706A1 WO2021187706A1 PCT/KR2020/014029 KR2020014029W WO2021187706A1 WO 2021187706 A1 WO2021187706 A1 WO 2021187706A1 KR 2020014029 W KR2020014029 W KR 2020014029W WO 2021187706 A1 WO2021187706 A1 WO 2021187706A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stainless steel
- martensitic stainless
- chromium
- temperature
- hot
- Prior art date
Links
- 229910001105 martensitic stainless steel Inorganic materials 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011651 chromium Substances 0.000 claims abstract description 110
- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 238000005260 corrosion Methods 0.000 claims abstract description 49
- 230000007797 corrosion Effects 0.000 claims abstract description 48
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 41
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 39
- 238000001556 precipitation Methods 0.000 claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims description 89
- 238000005336 cracking Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 33
- 238000000137 annealing Methods 0.000 claims description 27
- 229910000734 martensite Inorganic materials 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 10
- 229910000859 α-Fe Inorganic materials 0.000 claims description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 238000005275 alloying Methods 0.000 claims description 8
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- 238000007710 freezing Methods 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 229910001208 Crucible steel Inorganic materials 0.000 claims 1
- 241000428199 Mustelinae Species 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 73
- 238000005728 strengthening Methods 0.000 description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 19
- 239000011572 manganese Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 229910001566 austenite Inorganic materials 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 238000005498 polishing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 239000010754 BS 2869 Class F Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- QKCQJEFEQXXXTO-UHFFFAOYSA-N chromium;methane Chemical compound C.C.[Cr].[Cr].[Cr] QKCQJEFEQXXXTO-UHFFFAOYSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Images
Classifications
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/02—Hardening by precipitation
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
-
- 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
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following 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
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C22C38/04—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
-
- 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
- C21D2211/004—Dispersions; Precipitations
-
- 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
-
- 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
- C21D2211/008—Martensite
Definitions
- the present invention relates to a high corrosion-resistance martensitic stainless steel and a method for manufacturing the same, and more particularly, to a high-corrosion-resistant martensitic stainless steel that can be used as a material for Western dishes and a method for manufacturing the same.
- materials for cutting materials such as esophagus, scissors, razors, and scalpels, which are widely used medical instruments, require high hardness to maintain machinability and wear resistance, and excellent corrosion resistance is required because they are easily contacted with moisture or stored in a humid atmosphere. Accordingly, high-hardness, high-carbon martensitic stainless steel is mainly used as a material for painting.
- the material for painting requires high hardness, it is very brittle. Accordingly, it is necessary to soften the coating material to a certain level or more to facilitate processing. For this purpose, it is manufactured including a batch annealing furnace (BAF) or a high-temperature continuous annealing process for easy heat treatment of brittle materials.
- BAF batch annealing furnace
- the present invention provides a martensitic stainless steel hot-annealed steel sheet having an appropriate hardness during reinforcing heat treatment and improving corrosion resistance by uniformly distributing fine chromium carbonitride in a matrix structure, and high corrosion resistance martensitic stainless steel using the same
- An object of the present invention is to provide a steel and a method for manufacturing the same.
- Martensitic stainless steel hot annealed steel sheet according to an embodiment of the present invention, by weight, C: 0.14 to 0.21%, N: 0.05 to 0.11%, Si: 0.1 to 0.6%, Mn: 0.4 to 1.2%, Cr : 14.0 to 17.0%, C + N: 0.2 to 0.32%, including the remaining Fe and unavoidable impurities, 25 //100 ⁇ m 2 or more chromium carbide or chromium nitride is distributed in the microstructure, and the precipitation temperature of the chromium carbide is It is 950 degrees C or less, and the PREN value of following formula (1) is 16 or more.
- Cr, Mo, and N mean the content (% by weight) of each alloying element.
- the elongation of the martensitic stainless steel hot-rolled annealed steel sheet may be 20% or more.
- High corrosion resistance martensitic stainless steel in an embodiment of the present invention by weight, C: 0.14 to 0.21%, N: 0.05 to 0.11%, Si: 0.1 to 0.6%, Mn: 0.4 to 1.2%, Cr: 14.0 to 17.0%, C + N: 0.2 to 0.32%, including the remaining Fe and unavoidable impurities, the PREN value of the following formula (1) is 16 or more, and the value of the following formula (2) is 950 or less.
- Cr, Mo, N, C, Si, and Mn mean the content (wt%) of each alloying element.
- the high corrosion resistance martensitic stainless steel may have a Rockwell hardness in the range of 47 to 53 HRC.
- the high corrosion resistance martensitic stainless steel may have a pitting potential of 180 mV or more at 25° C. and 3.5% NaCl aqueous solution.
- the method of manufacturing high corrosion-resistance martensitic stainless steel by weight, C: 0.14 to 0.21%, N: 0.05 to 0.11%, Si: 0.1 to 0.6%, Mn: 0.4 to 1.2% , Cr: 14.0 to 17.0%, C + N: 0.2 to 0.32%, hot-rolling a cast slab containing the remaining Fe and unavoidable impurities; top-annealing the hot-rolled material; and strengthening the hot-rolled annealing material; including, wherein the upper annealing heat treatment is a first cracking treatment step for 5 to 25 hours at a temperature range of 720 to 900°C, and 5 to at a temperature range of 500 to 700°C and a second cracking treatment for 15 hours, wherein the hot-rolled annealed material has ferrite as a matrix structure and 25/100 ⁇ m 2 or more of chromium carbide or chromium nitride is distributed.
- the step of pre-cracking for 5 to 15 hours at a temperature range of 400 to 600 °C before the first cracking treatment may further include have.
- the temperature may be increased at a rate of 40 to 200° C./h from the pre-cracking step to the first cracking treatment step.
- the first cracking treatment step after the first cracking treatment step, it can be cooled at a rate of 10°C/h or more until the second cracking treatment step.
- the strengthening heat treatment may include an austenizing treatment at a temperature of 1,000° C. or more for 1 minute or more, and quenching at a rate of 0.15° C./s or more at room temperature.
- the step of deep freezing for 10 seconds to 5 minutes at a temperature of -50 to -150 °C, tempering for 30 minutes to 2 hours at a temperature of 400 to 600 °C more may include
- the martensitic stainless steel hot annealed steel sheet according to the present invention can improve workability by controlling the fine chromium carbide to be uniformly distributed in the microstructure.
- the high corrosion-resistance martensitic stainless steel according to the present invention can suppress chromium carbide residue after strengthening heat treatment by lowering the carbide precipitation temperature, thereby exhibiting excellent corrosion resistance even without relatively high content of chromium and carbon.
- SEM scanning electron microscope
- SEM scanning electron microscope
- SEM scanning electron microscope
- Martensitic stainless steel hot annealed steel sheet according to an embodiment of the present invention, by weight, C: 0.14 to 0.21%, N: 0.05 to 0.11%, Si: 0.1 to 0.6%, Mn: 0.4 to 1.2%, Cr : 14.0 to 17.0%, C + N: 0.2 to 0.32%, including the remaining Fe and unavoidable impurities, 25 //100 ⁇ m 2 or more chromium carbide or chromium nitride is distributed in the microstructure, and the precipitation temperature of the chromium carbide is It is 950 degrees C or less, and the PREN value of following formula (1) is 16 or more.
- Cr, Mo, and N mean the content (% by weight) of each alloying element.
- Martensitic stainless steel for culinary use requires high corrosion resistance and hardness.
- fine chromium carbide and/or chromium nitride hereinafter referred to as chromium carbonitride
- chromium carbonitride fine chromium carbide and/or chromium nitride
- a fine chromium carbonitride should be formed in the ferrite structure of the hot-rolled annealed material, and then the precipitation temperature should be low.
- 0.3% or more of high carbon is added to increase the precipitation temperature of chromium carbonitride, and coarse chromium carbonitride is locally precipitated at the grain boundary due to preferential precipitation and growth of chromium carbonitride at the grain boundary.
- the strengthening heat treatment the re-solubility into the austenite phase is lowered, resulting in a decrease in hardness and corrosion resistance.
- the present invention improves corrosion resistance by uniformly distributing fine chromium carbonitrides in the matrix structure through the establishment of an upper annealing pattern, and at the same time controlling the precipitation temperature of chromium carbonitrides to a level that can be decomposed at the time of strengthening and opening, improving corrosion resistance, and strengthening heat treatment
- An object of the present invention is to provide a highly corrosion-resistant martensitic stainless steel alloy component system capable of having an appropriate hardness.
- the martensitic stainless steel hot-rolled steel sheet according to an embodiment of the present invention is, by weight, C: 0.14 to 0.21%, N: 0.05 to 0.11%, Si: 0.1 to 0.6%, Mn: 0.4 to 1.2%, Cr: 14.0 to 17.0%, C+N: 0.2 to 0.32%, the remainder Fe and unavoidable impurities.
- the content of carbon (C) is 0.14 to 0.21%.
- C When the content of C is low, since hardness is lowered after reinforcing heat treatment, so that it may be difficult to secure machinability and wear resistance, C may be added in an amount of 0.14% or more in the present invention. However, if the C content is excessive, chromium carbonitride is excessively formed, and the precipitation temperature is high, which remains after the strengthening heat treatment, so that corrosion resistance is deteriorated, and there is a fear that coarse carbide is formed in the annealing structure due to carbon segregation. Accordingly, the upper limit of the C content in the present invention is limited to 0.21%. More preferably, it may be in the range of 0.145 to 0.17%.
- the content of nitrogen (N) is 0.05 to 0.11%.
- N is an element added to improve corrosion resistance and hardness at the same time, and even if added instead of C, it does not cause local fine segregation and thus does not form coarse precipitates.
- N may be added by 0.05% or more, preferably 0.08% or more. If the N content is excessive, it may be difficult to control the component system as it exceeds the melting limit in molten steel during casting, and it may appear in pinhole defects on the surface. And in the present invention, the upper limit of the N content is limited to 0.11% as the martensitic stainless steel for aquaculture does not require high hardness exceeding 53 HRC of Rockwell hardness, and high gloss properties for aesthetics are required.
- the content of silicon (Si) is 0.1 to 0.6%.
- Si is an element essential for deoxidation. In consideration of this, in the present invention, 0.1% or more of Si may be added. However, when the Si content is excessive, there is a problem in that the pickling property is lowered and the brittleness is increased. Accordingly, the upper limit of the Si content in the present invention is preferably limited to 0.6%.
- the content of manganese (Mn) is 0.4 to 1.2%.
- Mn is an element essential for deoxidation.
- 0.4% or more of Mn is added in order to supplement the stability of austenite, which is reduced according to the reduction of C and N content, and to secure a solid solution of N.
- the upper limit of the Mn content in the present invention is preferably limited to 1.2%. More preferably, it may be in the range of 0.8 to 1.1%.
- the content of chromium (Cr) is 14.0 to 17.0%.
- Cr is a representative element for improving corrosion resistance of stainless steel and serves to increase the solid solubility of N.
- 14.0% or more of Cr is added to ensure sufficient corrosion resistance.
- the upper limit of the Cr content in the present invention is limited to 17.0%.
- the sum of the carbon (C) and nitrogen (N) contents is 0.2 to 0.32%.
- C and N may be added in an amount of 0.2% or more to secure the hardness of the steel after reinforcing heat treatment, and 0.23% or more is preferable to secure the number of carbonitrides.
- the C + N content is excessive, the elongation may decrease due to an increase in the fraction of chromium carbonitride distributed during the upper annealing of the hot-rolled steel sheet, and the upper limit of the C + N content in the present invention is limited to 0.32%.
- high gloss properties are required to achieve aesthetics without requiring high hardness exceeding HRC 53 compared to general porcelain use.
- the upper limit of the C+N content may be limited to 0.28% or less to prevent excessive hardening and to control the hardness to an appropriate range.
- the remaining component of the present invention is iron (Fe).
- Fe iron
- the impurities are known to any person skilled in the art of a conventional manufacturing process, all details thereof are not specifically mentioned in the present specification.
- each alloying element in addition to limiting the content of each alloying element to the above-described conditions, the relationship between them may be further limited as follows.
- the martensitic stainless steel hot-rolled annealed steel sheet of the present invention and the martensitic stainless steel subjected to reinforcement heat treatment have a pitting resistance equivalent number (PREN) value of 16 or more in Equation (1) below.
- the martensitic stainless steel hot-rolled material having the above alloy composition is manufactured into a cast slab by continuous casting or ingot casting, and then hot-rolled to produce a hot-rolled steel sheet that can be processed. Then, the manufactured hot-rolled steel sheet is subjected to upper annealing heat treatment to ensure good workability before proceeding with processing such as precision rolling to a thickness usable for coating.
- the microstructure after the upper annealing heat treatment has ferrite as the main structure, and fine chromium carbide may be uniformly distributed.
- the martensitic stainless steel hot-rolled annealed material is manufactured into martensitic stainless steel by a subsequent strengthening heat treatment step.
- the phase annealing heat treatment includes a first cracking treatment step and a second cracking treatment step. In addition, it may optionally further include a pre-cracking step prior to the first cracking treatment step.
- the pre-cracking step is a step of cracking before the first cracking step, and is a pre-treatment step for uniformly increasing the temperature throughout the material.
- the pre-cracking step is preferably heated to a constant temperature for 5 to 10 hours in a temperature range of 400 to 600 °C.
- the heating temperature is less than 400°C or exceeds 600°C, it is impossible to uniformly increase the temperature throughout the material.
- the heating time is less than 5 hours or exceeds 10 hours, it is impossible to uniformly increase the temperature throughout the material.
- the first cracking treatment is a step of uniformly distributing chromium carbonitride in the microstructure of the hot-rolled steel sheet.
- the first cracking treatment step is preferably heated to a constant temperature for 5 to 25 hours at 720 to 900 °C.
- the heating temperature is less than 720 °C, local chromium carbonitride agglomerate may be formed at the grain boundary, and when the heating temperature exceeds 900 °C, coarse chromium carbonitride is formed at the grain boundary.
- the heating time is less than 5 hours, the size of chromium carbonitride can be refined, but chromium carbonitride may be centrally distributed in a part, and when the heating time exceeds 25 hours, chromium carbonitride close to each other is combined to make it locally coarse can be formed.
- the heating temperature in the first cracking treatment step is 720 to 900° C., and the heating time is limited to 5 to 25 hours.
- the second cracking treatment step is a step of spheroidizing the chromium carbonitride.
- spheroidizing the chromium carbonitride it is possible to improve the workability in the subsequent machining process.
- a heating temperature of at least 500°C is required.
- the heating temperature exceeds 700 ° C.
- the spheroidized chromium carbonitride grows excessively, the number decreases, and the ductility deteriorates.
- the heating time is less than 5 hours, the chromium carbonitride is not spheroidized, and when the heating time exceeds 15 hours, the chromium carbonitride grows excessively and the ductility is reduced.
- the temperature may be increased at a rate of 40 to 200° C./h until the first cracking treatment step.
- the time passing through 700 to 750 ° C. which is a temperature section in which chromium carbonitride is coarsened, may increase, and accordingly, the size of chromium carbonitride is coarsened and chromium distributed in the microstructure As the number of carbides is reduced, ductility may be deteriorated.
- the temperature increase rate exceeds 200° C./h the time passing through the temperature section in which the chromium carbonitride is coarsened is reduced, so that fine chromium carbonitride can be secured.
- chromium carbonitride is not uniformly distributed due to insufficient time to diffuse.
- the first cracking treatment step After the first cracking treatment step, it may be cooled at a rate of 10° C./h or more until the second cracking treatment step.
- the cooling rate is less than 10 °C/h
- the time passing through the temperature section where the chromium carbonitride is coarsened increases, and accordingly, the chromium carbonitride is coarsened in the microstructure, making it difficult to secure high corrosion resistance and high hardness.
- air cooling may be performed.
- the chromium carbonitride uniformly and finely distributed in the microstructure in the phase annealing heat treatment step described above enables the rapid re-dissolution of carbon, nitrogen and chromium into the high-temperature austenite phase in the subsequent strengthening heat treatment step, so that after rapid cooling It is possible to improve the hardness and corrosion resistance of the martensitic structure.
- chromium carbonitrides in the microstructure of the martensitic stainless steel hot-rolled steel sheet can be refined and uniformly distributed through the above-mentioned phase annealing heat treatment, and 25 chromium carbonitrides of 25/100 ⁇ m 2 or more are distributed in the microstructure. can do. 25/100 ⁇ m 2 in microstructure
- the chromium carbonitride is distributed less than, the number of chromium carbonitride is small and the size is coarse, so that ductility is reduced, and it is difficult to re-dissolve chromium and carbon in the subsequent strengthening heat treatment step, so that the desired hardness cannot be secured.
- the martensitic stainless steel hot-rolled material subjected to the upper annealing heat treatment may be manufactured into martensitic stainless steel through a step of reinforcing heat treatment after being processed into a final shape.
- the strengthening heat treatment may include an austenizing treatment step and a quenching step, and may further include a deep freezing step and an annealing step if necessary.
- the step of the austenizing treatment is a step of transforming the matrix structure of the steel from ferrite to austenite.
- the chromium carbonitride is re-dissolved into the matrix in the form of chromium, carbon, and nitrogen to increase the hardness of the martensitic stainless steel after the subsequent quenching or deep freezing step.
- heat treatment may be performed at a temperature of 1,000° C. or higher for 1 minute or longer.
- both chromium and carbon may be re-dissolved during austenizing depending on the precipitation temperature of chromium carbide (Cr 23 C 6 ), and the chromium carbide precipitation temperature for the purpose of the present invention is 950° C. or less.
- the chromium carbide precipitation temperature can be changed depending on the alloy component composition and can be expressed by Equation (2) below. As can be seen from Equation (2), in particular, the higher the content of chromium and carbon, the higher the precipitation temperature of chromium carbide.
- the precipitation temperature of chromium carbide increases, thereby limiting the austenizing temperature range of the strengthening heat treatment.
- all of the chromium carbide may remain without being re-dissolved due to a facility problem or an energy cost increase problem due to the limitation of the heating capacity during the actual strengthening heat treatment, and in this case, the corrosion resistance is rather deteriorated. Therefore, in the present invention, the content of chromium and carbon added by limiting the precipitation temperature of chromium carbide to 950° C. or less along with the alloy composition can contribute to corrosion resistance entirely.
- the austenizing treatment temperature is less than 1,000 °C, it may be difficult to decompose all of the chromium carbide, and the treatment time is long, which is not economical.
- the treatment temperature is too high, energy cost increases, which is uneconomical, and hardness may decrease due to excessive formation of retained austenite due to increased carbide inventory capacity, and excessive grain growth occurs, so it is preferable to limit it to 1,200 ° C or less. do.
- the austenizing treatment time is less than 1 minute, it is difficult to decompose all of the chromium carbide, so the desired hardness cannot be secured. It is preferable to limit it to
- the quenching step is a step of rapidly cooling to room temperature at a cooling rate of 0.15° C./s or more after the austenizing treatment to transform the austenite structure into martensite with high hardness. Higher martensitic hardness can be obtained by cooling at a cooling rate of 0.2°C/s or more.
- the step of deep freezing is a step of further transforming the retained austenite structure into a martensitic structure by further cooling the steel material quenched to room temperature at a cryogenic temperature, and the hardness of the steel material is further increased with this step.
- the deep freezing may include performing subzero heat treatment at a temperature of -50 to -150° C. for 10 seconds to 5 minutes.
- the tempering step is a step for imparting toughness to the martensitic structure with high hardness and strong brittleness after the step of deep freezing.
- heat treatment may be performed at a temperature of 400 to 600° C. for 30 minutes to 2 hours.
- the ferrite structure can be finally transformed into a martensite structure by the above-described strengthening heat treatment step, and desired hardness and high corrosion resistance properties can be secured.
- the area fraction of chromium carbonitride remaining in the cross section of the material after re-dissolving by reinforcing heat treatment may be 2% or less.
- the high corrosion-resistance martensitic stainless steel according to an embodiment of the present invention may have a pitting potential of 180 mV or more at 25° C. and 3.5% NaCl aqueous solution. This can be ensured by re-dissolving all of the carbides by controlling the PREN value of the above-mentioned formula (1) to 16.0 or more and the chromium carbide precipitation temperature to 950° C. or less.
- the high corrosion resistance martensitic stainless steel according to an embodiment of the present invention may have a Rockwell hardness of 47 to 53 HRC.
- High hardness of more than 53 HRC is not required because high hardness is not required among martensitic stainless steels for ceramics, and work productivity problems may occur even in polishing for polishing.
- a hardness range of 49 to 53 HRC for the blade and 47 to 51 HRC for the handle is suitable based on the Western knife. Therefore, in the present invention, the upper limit of the C + N content is limited to 0.32% or less, and the alloy composition system is limited to the above-described range so that the alloy can have an appropriate hardness even when the entire amount is re-dissolved through control of the chromium carbide precipitation temperature. Accordingly, the high corrosion resistance martensitic stainless steel of the present invention may have a Rockwell hardness range of 47 to 53 HRC.
- Phase annealing was pre-cracked at 500 °C for 7 hours, heated at a rate of about 100 °C/h, and first cracked at 840 °C for 10 hours, cooled at a rate of 15 °C/h and maintained at 580 °C for 10 hours, followed by air cooling. .
- the precipitation temperature of chromium carbide is 990 °C or higher, but when the entire alloy composition range including C and Cr falls within the scope of the present invention, the precipitation temperature is 950 °C or less.
- the number of chromium carbonitrides in the microstructure was observed with a scanning electron microscope (SEM) for the A to F hot-rolled annealed materials prepared as above, and the elongation obtained by performing a tensile test according to JIS 13 B standard is shown in Table 2 below. .
- Both steel grades B and C have a high C content of about 0.25%, but there is a difference in the N content.
- Steel grade B showed a smaller number of carbonitrides of 21/100 ⁇ m 2 than steel grade C even though the C+N content was higher, which is presumed to be coarse because the distribution fraction of precipitated chromium carbonitrides is too high.
- steel grade B had a high C+N content, so the elongation was slightly inferior to 19.6%.
- Steel grade C has good chromium carbonitride distribution number and elongation of 32 pieces/100 ⁇ m 2 and 29.3%, but has a high chromium carbide precipitation temperature of 991°C, so there is a high possibility of chromium carbonitride remaining after reinforcing heat treatment.
- FIG. 1 is a scanning electron microscope (SEM) photograph of chromium carbonitride in the microstructure of a steel grade F hot-rolled annealed steel sheet.
- SEM scanning electron microscope
- the martensitic stainless hot-rolled annealed material was annealed at 1,050°C and quenched at a cooling rate of 0.27°C/s to prepare martensitic steel.
- Table 3 shows PREN and pitting potential measurements for corrosion resistance, and Rockwell hardness measurements for hardness. The PREN value was derived by substituting the content (wt%) of each alloying element in Equation (1), and the pitting potential was measured at 25° C. in a 3.5% NaCl aqueous solution.
- Steel grade C showed a PREN value of 17.21 and a high pitting potential of 212 mV, but the hardness was high as 54.7 HRC due to high C content. Phosphorus exceeded 47-53 HRC.
- Steel class F corresponding to the present invention had a PREN value of 16.52, which was 16.0 or higher, an excellent pitting potential value of 199 mV, and a hardness value of 51.4 HRC, which was an appropriate level.
- the martensitic stainless steel according to the present invention can improve corrosion resistance and secure appropriate hardness during reinforcing heat treatment, so that it can be applied to materials for Western dishes.
Landscapes
- 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)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
강종 | 조성(중량%) | 크롬 탄화물석출온도(℃) | 핀홀 발생 여부 | 비고 | |||||
C | Si | Mn | Cr | Mo | N | ||||
A | 0.6500 | 0.29 | 0.69 | 13.12 | 0.01 | 0.156 | 1,208 | × | 비교강1 |
B | 0.2530 | 0.42 | 0.45 | 15.36 | 0.01 | 0.195 | 1,012 | ○ | 비교강2 |
C | 0.2445 | 0.47 | 0.46 | 15.35 | 0.01 | 0.114 | 991 | × | 비교강3 |
D | 0.150 | 0.50 | 0.45 | 13.50 | 0.01 | 0.080 | 911 | × | 비교강4 |
E | 0.1460 | 0.51 | 0.48 | 13.45 | 0.01 | 0.095 | 912 | ○ | 비교강5 |
F | 0.1620 | 0.31 | 0.98 | 14.97 | 0.01 | 0.095 | 937 | × | 발명강 |
강종 | C | N | C+N | 크롬 탄질화물 개수(개/100㎛ 2) | 연신율(%) | 비고 |
A | 0.6500 | 0.156 | 0.8060 | 63 | 17.6 | 비교강1 |
B | 0.2530 | 0.195 | 0.4480 | 21 | 19.6 | 비교강2 |
C | 0.2445 | 0.114 | 0.3585 | 32 | 29.3 | 비교강3 |
D | 0.150 | 0.080 | 0.2300 | 19 | 28.1 | 비교강4 |
E | 0.1460 | 0.095 | 0.2410 | 17 | 32.4 | 비교강5 |
F | 0.1620 | 0.095 | 0.2570 | 30 | 30.2 | 발명강 |
강종 | PREN | 공식전위(mV) | 경도(HRC) | 비고 |
A | 15.65 | 15 | 61.0 | 비교강1 |
B | 18.51 | 240 | 52.6 | 비교강2 |
C | 17.21 | 212 | 54.7 | 비교강3 |
D | 14.81 | 97 | 51.2 | 비교강4 |
E | 15.00 | 93 | 51.9 | 비교강5 |
F | 16.52 | 199 | 51.4 | 발명강 |
Claims (11)
- 중량%로, C: 0.14 내지 0.21%, N: 0.05 내지 0.11%, Si: 0.1 내지 0.6%, Mn: 0.4 내지 1.2%, Cr: 14.0 내지 17.0%, C+N: 0.2 내지 0.32%, 나머지 Fe 및 불가피한 불순물을 포함하고,미세조직 내 25개/100㎛ 2 이상의 크롬 탄화물 또는 크롬 질화물이 분포하며,상기 크롬 탄화물의 석출온도가 950℃ 이하이며,하기 식 (1)의 PREN 값이 16 이상인 고내식 마르텐사이트계 스테인리스 열연소둔 강판.(1) Cr + 3.3 Mo + 16 N(여기서, Cr, Mo, N은 각 합금원소의 함량(중량%)을 의미한다)
- 제1항에 있어서,연신율이 20% 이상인 고내식 마르텐사이트계 스테인리스 열연소둔 강판.
- 중량%로, C: 0.14 내지 0.21%, N: 0.05 내지 0.11%, Si: 0.1 내지 0.6%, Mn: 0.4 내지 1.2%, Cr: 14.0 내지 17.0%, C+N: 0.2 내지 0.32%, 나머지 Fe 및 불가피한 불순물을 포함하고,하기 식 (1)의 PREN 값이 16 이상이며,하기 식 (2)의 값이 950 이하인 고내식 마르텐사이트계 스테인리스강.(1) Cr + 3.3 Mo + 16 N(2) 674 + 569 C - 4.17 Si + 0.46 Mn + 10.3 Cr + 193 N(여기서, Cr, Mo, N, C, Si, Mn은 각 합금원소의 함량(중량%)을 의미한다)
- 제3항에 있어서,로크웰 경도가 47 내지 53 HRC 범위인 고내식 마르텐사이트계 스테인리스강.
- 제3항에 있어서,25℃, 3.5% NaCl 수용액 하에서, 공식전위가 180 mV 이상인 고내식 마르텐사이트계 스테인리스강.
- 중량%로, C: 0.14 내지 0.21%, N: 0.05 내지 0.11%, Si: 0.1 내지 0.6%, Mn: 0.4 내지 1.2%, Cr: 14.0 내지 17.0%, C+N: 0.2 내지 0.32%, 나머지 Fe 및 불가피한 불순물을 포함하는 주편을 열간압연하는 단계;열연재를 상소둔 열처리하는 단계; 및열연 소둔재를 강화 열처리하는 단계;를 포함하고,상기 상소둔 열처리는, 720 내지 900℃의 온도범위에서 5 내지 25시간 동안 제1 균열 처리하는 단계 및 500 내지 700℃의 온도범위에서 5 내지 15시간 동안 제2 균열 처리하는 단계를 포함하며,상기 열연 소둔재는 페라이트를 기지조직으로 하여 25개/100㎛ 2 이상의 크롬 탄화물 또는 크롬 질화물이 분포되어 있는 고내식 마르텐사이트계 스테인리스강의 제조방법.
- 제6항에 있어서,상기 상소둔 열처리에서, 상기 제1 균열 처리하는 단계 이전에 400 내지 600℃의 온도범위에서 5 내지 10시간 동안 사전 균열 처리하는 단계;를 더 포함하는 고내식 마르텐사이트계 스테인리스강의 제조방법.
- 제7항에 있어서,상기 사전 균열 처리하는 단계 이후 상기 제1 균열 처리하는 단계에 이르기까지 40 내지 200℃/h의 속도로 승온하는 것을 특징으로 하는 고내식 마르텐사이트계 스테인리스강의 제조방법.
- 제6항에 있어서,상기 제1 균열 처리하는 단계 이후에 상기 제2 균열 처리하는 단계에 이르기까지 10℃/h 이상의 속도로 냉각하는 것을 특징으로 하는 고내식 마르텐사이트계 스테인리스강의 제조방법.
- 제6항에 있어서,상기 강화 열처리는, 1,000℃ 이상의 온도에서 1분 이상 오스테나이징 처리하는 단계, 상온으로 0.15℃/s 이상의 속도로 소입하는 단계를 포함하는 고내식 마르텐사이트계 스테인리스강의 제조방법.
- 제10항에 있어서,상기 소입하는 단계 후, -50 내지 -150℃의 온도에서 10초 내지 5분 동안 딥 프리징하는 단계, 400 내지 600℃의 온도에서 30분 내지 2시간 동안 소려하는 단계를 더 포함하는 고내식 마르텐사이트계 스테인리스강의 제조방법.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022554348A JP2023517590A (ja) | 2020-03-20 | 2020-10-14 | 高耐食マルテンサイト系ステンレス鋼及びその製造方法 |
EP20925160.2A EP4098765A4 (en) | 2020-03-20 | 2020-10-14 | MARTENSITIC STAINLESS STEEL WITH HIGH ANTI-CORROSIVE POWER AND ITS MANUFACTURING METHOD |
CA3171590A CA3171590A1 (en) | 2020-03-20 | 2020-10-14 | Highly anticorrosive martensitic stainless steel, and manufacturing method therefor |
CN202080098335.5A CN115667569A (zh) | 2020-03-20 | 2020-10-14 | 高度防腐蚀马氏体不锈钢及其制造方法 |
US17/908,124 US20230107193A1 (en) | 2020-03-20 | 2020-10-14 | Highly anticorrosive martensitic stainless steel, and manufacturing method therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020200034294A KR102326693B1 (ko) | 2020-03-20 | 2020-03-20 | 고내식 마르텐사이트계 스테인리스강 및 그 제조방법 |
KR10-2020-0034294 | 2020-03-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021187706A1 true WO2021187706A1 (ko) | 2021-09-23 |
Family
ID=77768211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2020/014029 WO2021187706A1 (ko) | 2020-03-20 | 2020-10-14 | 고내식 마르텐사이트계 스테인리스강 및 그 제조방법 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20230107193A1 (ko) |
EP (1) | EP4098765A4 (ko) |
JP (1) | JP2023517590A (ko) |
KR (1) | KR102326693B1 (ko) |
CN (1) | CN115667569A (ko) |
CA (1) | CA3171590A1 (ko) |
WO (1) | WO2021187706A1 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023121063A1 (ko) * | 2021-12-20 | 2023-06-29 | 주식회사 포스코 | 연화저항성이 향상된 마르텐사이트계 스테인리스강 및 그 제조방법 |
CN115896591A (zh) * | 2022-10-28 | 2023-04-04 | 中国科学院金属研究所 | 一种提升低碳马氏体不锈钢抗腐蚀性能和综合力学性能的方法 |
US20240209468A1 (en) * | 2022-12-23 | 2024-06-27 | Daido Steel Co., Ltd. | Martensitic stainless steel material for hydrogen gas environment and manufacturing method therefor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050054058A (ko) * | 2003-12-03 | 2005-06-10 | 주식회사 포스코 | 핀홀결함이 없는 마르텐사이트계 스테인레스강 |
KR100523107B1 (ko) * | 2000-06-23 | 2005-10-19 | 주식회사 포스코 | 420계열 마르텐사이트계 스테인레스 열연강판의열처리방법 |
CN101372734A (zh) * | 2007-08-24 | 2009-02-25 | 宝山钢铁股份有限公司 | 一种马氏体不锈钢及其制造方法 |
KR101356951B1 (ko) * | 2011-12-26 | 2014-01-28 | 주식회사 포스코 | 고경도 마르텐사이트계 스테인리스강 및 그 제조방법 |
KR101834996B1 (ko) * | 2016-10-19 | 2018-03-06 | 주식회사 포스코 | 경화능이 우수한 고경도 마르텐사이트계 스테인리스강 및 이의 제조 방법 |
JP2019167630A (ja) * | 2016-03-04 | 2019-10-03 | 日立金属株式会社 | マルテンサイト系ステンレス鋼部材 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3340225B2 (ja) * | 1993-01-12 | 2002-11-05 | 新日本製鐵株式会社 | 耐銹性に優れた高強度マルテンサイト系ステンレス鋼およびドリリングタッピンねじ |
JP3471576B2 (ja) * | 1997-07-31 | 2003-12-02 | 新日本製鐵株式会社 | 表面高硬度、高耐食性、高靭性マルテンサイト系ステンレス鋼 |
JP2000109957A (ja) * | 1998-10-05 | 2000-04-18 | Sumitomo Metal Ind Ltd | ガスケット用ステンレス鋼およびその製造方法 |
JP4857811B2 (ja) * | 2006-02-27 | 2012-01-18 | Jfeスチール株式会社 | 刃物用鋼 |
JP5033584B2 (ja) * | 2006-12-08 | 2012-09-26 | 新日鐵住金ステンレス株式会社 | 耐食性に優れるマルテンサイト系ステンレス鋼 |
JP5235452B2 (ja) * | 2008-02-28 | 2013-07-10 | 新日鐵住金ステンレス株式会社 | 耐食性と耐磨耗性に優れる織機部材用マルテンサイト系ステンレス鋼とその鋼帯の製造方法 |
CN101693982B (zh) * | 2009-09-30 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | 一种刃具用马氏体耐腐蚀钢板及其制造方法 |
KR101423826B1 (ko) * | 2012-07-16 | 2014-07-25 | 주식회사 포스코 | 마르텐사이트계 스테인리스강 및 그 제조방법 |
KR101648271B1 (ko) * | 2014-11-26 | 2016-08-12 | 주식회사 포스코 | 항균성이 우수한 고경도 마르텐사이트계 스테인리스강 및 이의 제조방법 |
US10655195B2 (en) * | 2015-04-21 | 2020-05-19 | Jfe Steel Corporation | Martensitic stainless steel |
-
2020
- 2020-03-20 KR KR1020200034294A patent/KR102326693B1/ko active IP Right Grant
- 2020-10-14 WO PCT/KR2020/014029 patent/WO2021187706A1/ko unknown
- 2020-10-14 CN CN202080098335.5A patent/CN115667569A/zh active Pending
- 2020-10-14 US US17/908,124 patent/US20230107193A1/en active Pending
- 2020-10-14 CA CA3171590A patent/CA3171590A1/en active Pending
- 2020-10-14 EP EP20925160.2A patent/EP4098765A4/en active Pending
- 2020-10-14 JP JP2022554348A patent/JP2023517590A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100523107B1 (ko) * | 2000-06-23 | 2005-10-19 | 주식회사 포스코 | 420계열 마르텐사이트계 스테인레스 열연강판의열처리방법 |
KR20050054058A (ko) * | 2003-12-03 | 2005-06-10 | 주식회사 포스코 | 핀홀결함이 없는 마르텐사이트계 스테인레스강 |
CN101372734A (zh) * | 2007-08-24 | 2009-02-25 | 宝山钢铁股份有限公司 | 一种马氏体不锈钢及其制造方法 |
KR101356951B1 (ko) * | 2011-12-26 | 2014-01-28 | 주식회사 포스코 | 고경도 마르텐사이트계 스테인리스강 및 그 제조방법 |
JP2019167630A (ja) * | 2016-03-04 | 2019-10-03 | 日立金属株式会社 | マルテンサイト系ステンレス鋼部材 |
KR101834996B1 (ko) * | 2016-10-19 | 2018-03-06 | 주식회사 포스코 | 경화능이 우수한 고경도 마르텐사이트계 스테인리스강 및 이의 제조 방법 |
Non-Patent Citations (1)
Title |
---|
See also references of EP4098765A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA3171590A1 (en) | 2021-09-23 |
CN115667569A (zh) | 2023-01-31 |
KR20210117712A (ko) | 2021-09-29 |
US20230107193A1 (en) | 2023-04-06 |
JP2023517590A (ja) | 2023-04-26 |
KR102326693B1 (ko) | 2021-11-17 |
EP4098765A4 (en) | 2024-04-24 |
EP4098765A1 (en) | 2022-12-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021187706A1 (ko) | 고내식 마르텐사이트계 스테인리스강 및 그 제조방법 | |
WO2016085203A1 (ko) | 항균성이 우수한 고경도 마르텐사이트계 스테인리스강 및 이의 제조방법 | |
WO2019125083A1 (ko) | 우수한 경도와 충격인성을 갖는 내마모강 및 그 제조방법 | |
WO2022050635A1 (ko) | 오스테나이트계 스테인리스강 및 그 제조 방법 | |
WO2022050501A1 (ko) | 핫스탬핑용 소재 및 그 제조방법 | |
WO2022139214A1 (ko) | 강도 및 내식성이 향상된 마르텐사이트계 스테인리스강 및 이의 제조 방법 | |
WO2020111857A1 (ko) | 크리프 강도가 우수한 크롬-몰리브덴 강판 및 그 제조방법 | |
WO2020040388A1 (ko) | 인성 및 부식피로특성이 향상된 스프링용 선재, 강선 및 이들의 제조방법 | |
WO2022131504A1 (ko) | 고온 연화저항성이 향상된 오스테나이트계 스테인리스강 | |
WO2019125076A1 (ko) | 우수한 경도와 충격인성을 갖는 내마모강 및 그 제조방법 | |
WO2018117480A1 (ko) | 표면특성이 우수한 오스테나이트계 스테인리스강 가공품 및 이의 제조 방법 | |
WO2021125555A1 (ko) | 내지연파괴 특성이 우수한 냉간단조용 선재, 부품 및 이들의 제조방법 | |
WO2021261884A1 (ko) | 생산성 및 원가 절감 효과가 우수한 고강도 오스테나이트계 스테인리스강 및 이의 제조방법 | |
WO2021125471A1 (ko) | 초고강도 스프링용 선재, 강선 및 그 제조방법 | |
WO2020085852A1 (ko) | 항복강도가 우수한 오스테나이트계 고망간 강재 및 그 제조방법 | |
WO2020130614A2 (ko) | 구멍확장성이 우수한 고강도 열연강판 및 그 제조방법 | |
WO2021125765A1 (ko) | 가공성이 우수한 강재 및 그 제조방법 | |
WO2017111437A1 (ko) | 린 듀플렉스 스테인리스강 및 이의 제조 방법 | |
WO2021125688A1 (ko) | 피로수명이 우수한 판 스프링용 강판 및 그 제조방법 | |
WO2024085736A1 (ko) | 마르텐사이트계 스테인리스강 및 그 제조방법 | |
WO2023048495A1 (ko) | 구멍확장성이 우수한 초고강도 냉연강판 및 그 제조방법 | |
WO2021221245A1 (ko) | 표면 특성이 향상된 페라이트계 스테인리스강 및 이의 제조방법 | |
WO2022139282A1 (ko) | 가공성이 우수한 고인성 고탄소 냉연강판 및 그 제조방법 | |
WO2024128470A1 (ko) | 고강도 오스테나이트계 스테인리스강 및 그 제조방법 | |
WO2024072023A1 (ko) | 냉연강판 및 그 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20925160 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022554348 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2020925160 Country of ref document: EP Effective date: 20220901 |
|
ENP | Entry into the national phase |
Ref document number: 3171590 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |