KR101659186B1 - 가요성이 우수한 오스테나이트계 스테인리스강 - Google Patents
가요성이 우수한 오스테나이트계 스테인리스강 Download PDFInfo
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- KR101659186B1 KR101659186B1 KR1020140191165A KR20140191165A KR101659186B1 KR 101659186 B1 KR101659186 B1 KR 101659186B1 KR 1020140191165 A KR1020140191165 A KR 1020140191165A KR 20140191165 A KR20140191165 A KR 20140191165A KR 101659186 B1 KR101659186 B1 KR 101659186B1
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- 229910001220 stainless steel Inorganic materials 0.000 title description 5
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 22
- 238000005482 strain hardening Methods 0.000 claims abstract description 20
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 229910001566 austenite Inorganic materials 0.000 description 9
- 239000013078 crystal Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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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
- C22C38/18—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
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- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
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- 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
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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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
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Abstract
본 발명의 가요성이 우수한 오스테나이트계 스테인리스강은, 중량 %로, Si : 0.1~0.65%, Mn : 1.0~3.0%, Ni : 6.5~10.0%, Cr: 16.5~18.5%, Cu : 6.0%이하(0은 제외), C+N : 0.13% 이하(0은 제외), 나머지는 Fe 및 불가피한 불순물을 포함하고,
하기의 수식으로 정의된 가공경화식 H1이 300 이하인 것을 특징으로 한다.
H1 = -459 + 79.8Si - 10.2Mn - 8.16Ni + 48.0Cr - 13.2Cu + 623(C+N)
Description
도 2는 결정립의 크기 분포를 나타낸 도면,
도 3은 결정립 크기에 따른 가공 경화식 H1의 변화를 나타낸 도면,
도 4는 수정 가공 경화식 H2와 가공 경화도 실측치와의 상관 관계를 나타낸 도면,
도 5는 오스테나이트 안정화 지수와 가공 경화도 실측치와의 상관 관계를 나타낸 도면이다.
구분 | Si | Mn | Ni | Cr | Cu | C+N | TS-YS | H1 |
발명예1 | 0.4 | 2.7 | 8.0 | 17.3 | 2.7 | 0.019 | 281 | 292 |
발명예2 | 0.4 | 1.7 | 9.6 | 17.4 | 3.2 | 0.028 | 277 | 284 |
발명예3 | 0.4 | 1.7 | 9.6 | 17.4 | 3.2 | 0.024 | 273 | 281 |
발명예4 | 0.4 | 2.8 | 9.6 | 17.5 | 3.1 | 0.010 | 276 | 271 |
발명예5 | 0.4 | 2.7 | 9.6 | 17.4 | 3.2 | 0.011 | 279 | 267 |
발명예6 | 0.4 | 2.7 | 9.7 | 17.5 | 3.2 | 0.019 | 277 | 273 |
발명예7 | 0.4 | 2.7 | 9.6 | 17.4 | 3.2 | 0.041 | 280 | 285 |
발명예8 | 0.4 | 1.2 | 8.3 | 16.9 | 2.1 | 0.016 | 287 | 286 |
발명예9 | 0.4 | 1.2 | 8.4 | 16.9 | 2.2 | 0.033 | 295 | 294 |
발명예10 | 0.4 | 1.2 | 8.1 | 17.0 | 2.8 | 0.018 | 288 | 284 |
발명예11 | 0.4 | 1.2 | 8.0 | 17.0 | 2.7 | 0.036 | 293 | 295 |
발명예12 | 0.4 | 1.2 | 8.4 | 16.8 | 2.7 | 0.017 | 280 | 275 |
발명예13 | 0.4 | 1.2 | 8.4 | 17.0 | 2.7 | 0.036 | 287 | 293 |
발명예14 | 0.6 | 1.2 | 7.6 | 16.9 | 3.0 | 0.017 | 283 | 296 |
발명예15 | 0.6 | 1.2 | 7.6 | 16.9 | 4.0 | 0.021 | 286 | 286 |
발명예16 | 0.6 | 1.2 | 7.6 | 16.7 | 5.0 | 0.020 | 274 | 263 |
비교예1 | 0.6 | 1.2 | 7.6 | 16.9 | 2.1 | 0.056 | 328 | 329 |
비교예2 | 0.4 | 1.0 | 7.9 | 17.7 | 0.2 | 0.088 | 407 | 399 |
비교예3 | 0.6 | 1.2 | 7.5 | 16.8 | 2.0 | 0.021 | 309 | 308 |
구분 | TS-YS | H1 | D | H2 |
발명예1 | 281 | 292 | 29 | 289 |
발명예2 | 277 | 284 | 31 | 282 |
발명예3 | 273 | 281 | 33 | 279 |
발명예4 | 276 | 271 | 29 | 271 |
발명예5 | 279 | 267 | 31 | 268 |
발명예6 | 277 | 273 | 32 | 272 |
발명예7 | 280 | 285 | 35 | 282 |
발명예17 | 269 | 336 | 223 | 273 |
발명예18 | 247 | 316 | 218 | 256 |
발명예19 | 240 | 301 | 209 | 246 |
발명예20 | 267 | 333 | 284 | 253 |
발명예21 | 283 | 316 | 93 | 292 |
비교예1 | 328 | 329 | 33 | 321 |
비교예4 | 337 | 406 | 210 | 337 |
비교예5 | 371 | 406 | 990 | 372 |
비교예6 | 313 | 336 | 72 | 316 |
구분 | Si | Mn | Ni | Cr | Cu | C+N |
발명예17 | 0.6 | 1.2 | 7.5 | 16.7 | 3.9 | 0.119 |
발명예18 | 0.6 | 1.3 | 7.6 | 17.0 | 5.0 | 0.087 |
발명예19 | 0.6 | 1.3 | 7.9 | 17.1 | 5.8 | 0.075 |
발명예20 | 0.5 | 1.1 | 6.9 | 17.1 | 4.4 | 0.091 |
발명예21 | 0.6 | 1.3 | 7.6 | 17.0 | 5.0 | 0.087 |
비교예4 | 0.2 | 1.4 | 8.1 | 18.1 | 0.2 | 0.105 |
비교예5 | 0.2 | 1.4 | 8.1 | 18.1 | 0.2 | 0.105 |
비교예6 | 0.6 | 1.2 | 7.5 | 16.7 | 3.9 | 0.119 |
구분 | TS-YS | Md30 |
발명예1 | 281 | -30 |
발명예2 | 277 | -88 |
발명예3 | 273 | -85 |
발명예4 | 276 | -88 |
발명예5 | 279 | -88 |
발명예6 | 277 | -97 |
발명예7 | 280 | -102 |
발명예8 | 287 | -2 |
발명예9 | 295 | -14 |
발명예10 | 288 | -18 |
발명예11 | 293 | -22 |
발명예12 | 280 | -21 |
발명예13 | 287 | -34 |
발명예14 | 283 | -13 |
발명예15 | 286 | -41 |
발명예16 | 274 | -69 |
비교예1 | 328 | -1 |
비교예2 | 407 | 20 |
비교예3 | 309 | 20 |
Claims (7)
- 중량 %로, Si : 0.1~0.65%, Mn : 1.0~3.0%, Ni : 6.5~10.0%, Cr: 16.5~18.5%, Cu : 6.0%이하(0은 제외), C+N : 0.13% 이하(0은 제외), 나머지는 Fe 및 불가피한 불순물을 포함하고,
하기의 수식으로 정의된 가공경화식 H1이 300 이하이며, 하기의 수식으로 정의된 가공경화식 H2는 300 이하인 것을 특징으로 하는, 가요성이 우수한 오스테나이트계 스테인리스강.
H1 = -459 + 79.8Si - 10.2Mn - 8.16Ni + 48.0Cr - 13.2Cu + 623(C+N)
H2 = 4.27+ 0.875(-459 + 79.8Si - 10.2Mn - 8.16Ni + 48.0Cr - 13.2Cu + 623(C+N))-287D
(D : 조직의 크기)
- 삭제
- 삭제
- 청구항 1에 있어서,
조직의 크기(D)는 20~300㎛인 것을 특징으로 하는, 가요성이 우수한 오스테나이트계 스테인리스강.
- 청구항 1에 있어서,
하기의 수식으로 정의된 Md30은 0 이하인 것을 특징으로 하는, 가요성이 우수한 오스테나이트계 스테인리스강.
Md30 = 551-462(C+N)-9.2Si-8.1Mn-29(Ni+Cu)-13.7Cr
- 청구항 5에 있어서,
Md30은 -100 ~ 0 인 것을 특징으로 하는, 가요성이 우수한 오스테나이트계 스테인리스강.
- 청구항 1 내지 청구항 6 중 어느 한 항에 있어서,
TS(인장강도)와 YS(항복강도)의 차이값은 300Mpa 이하인 것을 특징으로 하는, 가요성이 우수한 오스테나이트계 스테인리스강.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020140191165A KR101659186B1 (ko) | 2014-12-26 | 2014-12-26 | 가요성이 우수한 오스테나이트계 스테인리스강 |
CN201580071219.3A CN107429367A (zh) | 2014-12-26 | 2015-12-01 | 柔韧性优异的奥氏体系不锈钢 |
US15/539,874 US20170349985A1 (en) | 2014-12-26 | 2015-12-01 | Austenitic stainless steels excellent in flexibility |
JP2017530337A JP2018502991A (ja) | 2014-12-26 | 2015-12-01 | 可撓性に優れたオーステナイト系ステンレス鋼 |
EP15873501.9A EP3239341A4 (en) | 2014-12-26 | 2015-12-01 | Austenitic stainless steel having excellent flexibility |
PCT/KR2015/012973 WO2016104974A1 (ko) | 2014-12-26 | 2015-12-01 | 가요성이 우수한 오스테나이트계 스테인리스강 |
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US (1) | US20170349985A1 (ko) |
EP (1) | EP3239341A4 (ko) |
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KR101756701B1 (ko) * | 2015-12-23 | 2017-07-12 | 주식회사 포스코 | 가공성이 향상된 오스테나이트계 스테인리스강 |
EP3301199B1 (en) * | 2016-03-28 | 2021-01-20 | LG Electronics Inc. -1- | Bent pipe made of stainless steel |
KR101923922B1 (ko) | 2016-12-23 | 2018-11-30 | 주식회사 포스코 | 표면특성이 우수한 오스테나이트계 스테인리스강 가공품 및 이의 제조 방법 |
KR20180104519A (ko) * | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104521A (ko) * | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104507A (ko) | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104509A (ko) * | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104508A (ko) * | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104511A (ko) | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104520A (ko) | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
KR102357608B1 (ko) * | 2017-03-13 | 2022-02-04 | 엘지전자 주식회사 | 공기 조화기 |
KR20180104506A (ko) | 2017-03-13 | 2018-09-21 | 엘지전자 주식회사 | 공기 조화기 |
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- 2015-12-01 JP JP2017530337A patent/JP2018502991A/ja active Pending
- 2015-12-01 EP EP15873501.9A patent/EP3239341A4/en not_active Withdrawn
- 2015-12-01 WO PCT/KR2015/012973 patent/WO2016104974A1/ko active Application Filing
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WO2016104974A1 (ko) | 2016-06-30 |
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