KR970065740A - Manufacturing method of ferritic stainless steel excellent in corrosion resistance and moldability - Google Patents

Manufacturing method of ferritic stainless steel excellent in corrosion resistance and moldability Download PDF

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Publication number
KR970065740A
KR970065740A KR1019960006793A KR19960006793A KR970065740A KR 970065740 A KR970065740 A KR 970065740A KR 1019960006793 A KR1019960006793 A KR 1019960006793A KR 19960006793 A KR19960006793 A KR 19960006793A KR 970065740 A KR970065740 A KR 970065740A
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South Korea
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less
stainless steel
ferritic stainless
moldability
temperature range
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KR1019960006793A
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Korean (ko)
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KR100276319B1 (en
Inventor
유도열
박미남
원태연
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김종진
포항종합제철 주식회사
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Priority to KR1019960006793A priority Critical patent/KR100276319B1/en
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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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0405—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium 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 Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

본 발명은 공식전위 값을 이용하여 강중의 Cr 및 Mo의 첨가량을 조절하는 한편, (Nb+Ti)/(C+N) 및 Nb/Ti 비를 최적화하여 내식성 및 성형성이 동시에 우수한 페라이트계 스테인레스강 제조 방법을 제공하고자 하는데 목적이 있다.The present invention relates to a ferritic stainless steel having excellent corrosion resistance and moldability by optimizing (Nb + Ti) / (C + N) and Nb / Ti ratio while controlling the addition amount of Cr and Mo in steel using an official potential value And to provide a method of manufacturing a steel.

상기 목적을 달성하기 위한 본 발명은 페라이트계 스테인레스강의 제조방법에 있어서, 중량비로, C:0.02%이하, Si:0.6%이하, Mn:0.5%이하, P:0.02%이하, S:0.003% 이하, Cr:17.7-23%, Mo:4%이하, N:0.02%이하, Ti:0.3%이하 Nb:0.6%이하, 나머지 Fe 및 기타 불가피한 불순물로 조성되고, 상기 C와 N의 합이 0.03%이하이며, 공식전위 Vc'100값이 300이상이 되도록 Cr및 Mo 함량을 조정하여 첨가하고, (Nb+Ti)/(C+N):10-20및 Nb/Ti:2이상을 만족하는 스테인레스강을 1170-1250℃온도범위로 가열하여 열간압연후 750-900℃온도범위로 사상 압연하고 900-1000℃온도범위에서 열연소둔한 다음 급냉하고, 냉간압연율80% 이상으로 냉간 압연한 후 상기 열연소둔과 동일한 조건으로 냉연소둔처리한 다음, 급냉함을 포함하여 구성되는 성형성 및 내식성이 우수한 페라니트계 스테인레스강 제조방법에 관한 것을 그 요지로 한다.In order to accomplish the above object, the present invention provides a method for producing ferritic stainless steel, which comprises, by weight ratio, C: not more than 0.02%, Si: not more than 0.6%, Mn: not more than 0.5%, P: not more than 0.02%, S: Of Cr, 17.7-23% of Cr, 4% or less of Mo, 0.02% or less of N, 0.3% or less of Ti and 0.6% or less of Nb and the balance of Fe and other unavoidable impurities. satisfying the two or more: less, formal potential V c 'is added to adjust the Cr and Mo contents so that the value is greater than or equal to 100 and 300, (Nb + Ti) / ( C + N): 10-20 and the Nb / Ti The stainless steel is heated to a temperature range of 1170-1250 ° C, hot rolled and then hot rolled to a temperature range of 750-900 ° C, hot rolled and annealed at a temperature range of 900-1000 ° C, followed by quenching, cold rolling at a cold rolling rate of 80% To a method for producing ferronitic stainless steel excellent in moldability and corrosion resistance, which comprises cold rolling annealing under the same conditions as the hot rolling annealing and rapid cooling And as a base.

Description

내식성 및 성형성이 우수한 페라이트계 스테인레스강 제조방법Manufacturing method of ferritic stainless steel excellent in corrosion resistance and moldability

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 페라이트계 스테인레스강 중의 (Mb+Ti)/(C+N) 비변화에 따른 F값 변화를 나타낸 그래프, 제2도는 페라이트계 스테인레스강 중의 (Mb+Ti)/(C+N)비 변화에 따른 에릭센값 변화를 나타낸 그래프.FIG. 1 is a graph showing the change in F value according to the ratio of (Mb + Ti) / (C + N) in the ferritic stainless steel, A graph showing the change in Eric's value due to change.

Claims (2)

페라이트계 스테인레스강의 제조방법에 있어서, 중량비로, C:0.02%이하, Si:0.6%이하, Mn:0.5%이하, P:0.02%이하, S:0.003% 이하, Cr:17.7-23%, Mo:4%이하, N:0.02%이하, Ti:0.3%이하 Nb:0.6%이하, 나머지 Fe 및 기타 불가피한 불순물로 조성되고, 상기 C와 N의 합이 0.03%이하이며, 공식전위 Vc'100값이 300이상이 되도록 Cr및 Mo 함량을 조정하여 첨가하고, (Nb+Ti)/(C+N):10-20및 Nb/Ti:2이상을 만족하는 스테인레스강을 1170-1250℃온도범위로 가열하여 열간압연후 750-900℃온도범위로 사상 압연하고 900-1000℃온도범위에서 열연소둔한 다음 급냉하고, 냉간압연율80% 이상으로 냉간 압연한 후 상기 열연소둔과 동일한 조건으로 냉연소둔처리한 다음, 급냉함을 포함하여 구성되는 성형성 및 내식성이 우수한 페라이트계 스테인레스강 제조방법.The ferritic stainless steel according to claim 1, wherein the content of C is 0.02% or less, the content of Si is 0.6% or less, the content of Mn is 0.5% or less, the content of P is 0.02% or less, the content of S is 0.003% or less, the content of Cr is 17.7-23% : not more than 0.3% Nb:: 4% or less, N: 0.02% or less, Ti 0.6% or less, and the composition in balance of Fe and other unavoidable impurities, and wherein the C and N the sum of more than 0.03%, formula electric potential V c '100 (Nb + Ti) / (C + N): 10-20 and Nb / Ti: 2 or more in a temperature range of 1170-1250 ° C Hot rolling at a temperature range of 750 to 900 DEG C after hot rolling, hot rolling and annealing at a temperature range of 900 to 1000 DEG C, followed by quenching, cold rolling at a cold rolling rate of 80% or more and cold rolling annealing And then quenching the ferritic stainless steel, which is excellent in moldability and corrosion resistance. 제1항에 있어서, 상기 공식전위 Vc'100값은 계산식 Vc'100=44Cr%+15.7Mo%-537.8에 의해 구하는 것을 특징으로 하는 성형성 및 내식성이 우수한 페라이트계 스테인레스강 제조방법.The ferritic stainless steel producing method according to claim 1, wherein the formula V c ' 100 value is obtained by the formula V c ' 100 = 44Cr% + 15.7Mo% -537.8. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960006793A 1996-03-14 1996-03-14 The manufacturing method of ferrite stainless steel with excellent corrosion resistance and formability KR100276319B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000034394A (en) * 1998-11-30 2000-06-26 이구택 Ferrite stainless steel for cistern
KR100276301B1 (en) * 1996-11-29 2000-12-15 이구택 The manufacturing method of ferrite stainless steel with high corrosion resistance and high formability
KR100434879B1 (en) * 1999-12-30 2004-06-07 주식회사 포스코 a method of manufacturing the ferritic stainless steel with good workability
WO2024128560A1 (en) * 2022-12-12 2024-06-20 주식회사 포스코 Ferritic stainless steel with improved formability and manufacturing method therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230072327A (en) * 2021-11-17 2023-05-24 주식회사 포스코 Ferritic stainless steel with improved corrosion resistance and magnetic properties and manufacturing method therefor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0146798B1 (en) * 1995-07-05 1998-11-02 김종진 Method for manufacturing ferritic stainless steel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100276301B1 (en) * 1996-11-29 2000-12-15 이구택 The manufacturing method of ferrite stainless steel with high corrosion resistance and high formability
KR20000034394A (en) * 1998-11-30 2000-06-26 이구택 Ferrite stainless steel for cistern
KR100434879B1 (en) * 1999-12-30 2004-06-07 주식회사 포스코 a method of manufacturing the ferritic stainless steel with good workability
WO2024128560A1 (en) * 2022-12-12 2024-06-20 주식회사 포스코 Ferritic stainless steel with improved formability and manufacturing method therefor

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