WO2002101108A1 - Bande d'acier inoxydable double phase pour ceinture d'acier - Google Patents
Bande d'acier inoxydable double phase pour ceinture d'acier Download PDFInfo
- Publication number
- WO2002101108A1 WO2002101108A1 PCT/JP2002/005572 JP0205572W WO02101108A1 WO 2002101108 A1 WO2002101108 A1 WO 2002101108A1 JP 0205572 W JP0205572 W JP 0205572W WO 02101108 A1 WO02101108 A1 WO 02101108A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- less
- stainless steel
- transformation
- austenite
- Prior art date
Links
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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Definitions
- the present invention relates to a high-strength duplex stainless steel strip for a steel belt having an excellent surface shape in which a reducer band does not occur during shape correction in a steel belt manufacturing process.
- Stainless steel belts include work hardened austenitic stainless steels, which are reinforced by cold rolling austenitic stainless steels such as SUS301 and SUS304, as well as low-carbon martensitic stainless steels (Japanese Patent Publication No. No. 31085) and precipitation-hardening martensitic stainless steel (Japanese Patent Publication No. 59-49303).
- the work-hardened structure represented by SUS304 and SUS301 is a metastable austenitic structure, and a work-induced martensite is formed by deformation. As a result, during deformation, a reusable band is generated due to the formation of work-induced martensite (Journal of the Institute of Metals, Vol. 55, No. 4, pp. 376-382, Nisshin Steel Engineering Reports No. 69, Nos. 1--14). page). Undesired surface irregularities occur as a steel belt material.
- Martensite-precipitation-hardened martensite transforms almost to a single martensite phase during the cooling process after annealing in the manufacturing process, but tends to change its shape due to expansion accompanying the transformation. A deteriorated shape cannot be easily corrected in a belt state. Disclosure of the invention
- the present invention has been devised in order to solve such a problem, and the generation of a Ruder's band when correcting a belt shape such as a metastable austenite system, and the formation of a martens belt.
- a belt shape such as a metastable austenite system
- the purpose is to:
- the high-strength duplex stainless steel strip for steel belts of the present invention has a C content of 0.04 to 0.15 mass in order to achieve the object. / 0 , Cr: 10.0-20.0 mass.
- Ni contains 0.5 to 4.0% by mass, has a prior austenite average particle size of ⁇ or less, and has a volume of 20 to 85 at room temperature after transformation. / 0 has martensite and the remainder has a ferrite structure and has been refined to a hardness of HV300 or more.
- the average grain size of the prior austenite is less than ⁇ , and the average expansion when austenite undergoes martensitic transformation in the cooling step of the annealing step is less than 9%.
- the present inventors investigated and examined the effects on the reducer band generated when the shape of a steel belt was corrected from various viewpoints such as composition, structure, and material. As a result, it was found that the strain distribution and volume expansion accompanying the martensitic transformation had a great influence on the generation of the Luders band. In consideration of the effects of strain distribution and volume expansion, residual austenite is eliminated from the stainless steel strip, and the expansion strain generated when the austenite phase undergoes martensitic transformation during the cooling process in the annealing step is dispersed throughout the steel strip. Was effective in preventing the occurrence of the re-use band.
- alloy components, contents, and the like included in the duplex stainless steel strip targeted by the present invention will be described.
- Cr is included at / 0 or more. But 20.0 mass. If an excessive amount of Cr exceeding / 0 is added, the toughness and workability of the steel material decrease. As the Cr content increases, the amount of austenite-forming elements, such as C, N, Ni, Mn, and Cu, required for martensite formation and strengthening must be increased. Increasing the amount of austenite-forming elements not only increases steel strip costs, but also stabilizes austenite at room temperature, making it difficult to obtain high strength. Therefore, the upper limit of the Cr content is set to 20.0% by mass.
- the amount of martensite increases according to the Ni content, and the steel material is strengthened.
- the addition of Ni increases the frequency of nucleation of austenite by annealing in the (austenite + ferrite) two-phase region, resulting in a fine (austenite + ferrite) mixed structure.
- the mechanism by which the increase of Ni influences the formation of a fine two-phase mixed structure is that the growth rate of austenite nuclei slows beyond the critical nuclei defined by classical nucleation theory, while the equilibrium diagram shows that This is probably because the number of nucleation sites increases due to the formation of new austenite nuclei in an attempt to generate austenite.
- the effect of adding Ni on the refinement of the two-phase mixed structure is 0.5 mass. /. It becomes remarkable at the above Ni content.
- the austenite phase formed at a high temperature due to the excessive addition of Ni does not transform into martensite during the cooling process to room temperature and becomes residual austenite, thereby reducing the strength of the steel. Lower responsible.
- the upper limit of the Ni content is set to 4.0% by mass.
- austenite-forming elements such as Mn, Cu, and N and ferrite formation such as Si, Ti, Nb, and A1 are formed. Elements can be appropriately added, and each alloy component can be adjusted so that a ferrite + martensite double-phase structure can be obtained at room temperature.
- Mo is effective in improving corrosion resistance
- Y, Ca, REM (rare earth metal) is effective in improving oxidation resistance and hot workability
- B is effective in improving various properties as long as the required strength is not reduced. It is acceptable to add alloying elements such as V.
- the content of the optional component is determined as follows.
- austenite-forming element that suppresses the formation of ⁇ ferrite at high temperatures and facilitates the formation of austenite. But 2.0 mass. If an excessive amount of Mn exceeding / 0 is contained, retained austenite is easily generated after annealing, and when forming into a product shape, forms work-induced martensite and generates strain.
- the upper limit of the S content is 0.020 mass to suppress the adverse effects caused by S. It is preferable to regulate to / 0 .
- austenite-forming element It is an austenite-forming element and suppresses the formation of ⁇ -ferrite at high temperatures and promotes the formation of an austenite phase. But 0.10 mass. If an excessive amount of ⁇ exceeding / 0 is contained, retained austenite is likely to be formed after annealing. Retained austenite transforms into work-induced martensite at the stage of processing into the product shape, which also causes distortion. It is also a component that increases the strength of the cold-rolled annealed material. ⁇ The ductility decreases as the content increases.
- the Cu content is excessive, hot workability and corrosion resistance will be adversely affected.
- the adverse effect caused by Cu is that the Cu content is 2.0 mass. It is suppressed by regulating to / 0 or less.
- Ti, Nb, and V precipitate solid solution C as carbides to improve workability
- Zr is an alloy component that improves workability and toughness by trapping oxygen in steel as oxide, but is excessively added. Reduces productivity. Therefore, the content of each alloy component is Ti: 0.01 to 0.50 mass. Nb: 0.01-0.50 mass. V: 0.01 to 0.30 mass. Zr: 0.01 to 0.30 mass. It is preferable to select within the range of / 0 .
- REM rare earth metal: 0.1 mass. /. j3 ⁇ 4 below Y, Ca, and REM are effective alloy components for improving hot workability, but if they are added excessively, surface flaws are likely to occur.
- Y, Ca, REM preferably Y: 0.02 mass. /.
- Ca 0.05 mass. /.
- REM 0.1 mass. /.
- Each has an upper limit.
- the structure, the prior austenite grains, the expansion rate during the martensitic transformation, and the like are regulated in order to suppress the influence of distortion and volume expansion during martensitic transformation on the generation of the Reuse band.
- Tissue 20-85 volumes. / 0 martensite and balance ferrite
- the amount of martensite at room temperature is 20 to 85% by volume, and the amount of austenite at high temperature is 20 to 85% by volume. /. Hit.
- the austenite phase undergoes martensitic transformation in the course of cooling to room temperature, but transformation dislocations in the formed martensite and transformation strains caused by volume expansion accompanying martensitic transformation are introduced into the cooled stainless steel.
- the strain caused by the martensite transformation is uniformly dispersed and transformed into the surrounding soft ferrite grains.
- the distortion is absorbed.
- deformation due to transformation strain that appears on the outer surface of the steel strip is reduced.
- the strain is corrected by applying 1 to 2% tensile strain to a stainless steel strip in the form of a steel belt in which the transformation strain is uniformly dispersed and absorbed, the finely transformed transformation strain that is uniformly dispersed is absorbed by the distortion during straightening, and the Ruders band is used.
- the stainless steel strip is uniformly deformed without the occurrence of cracks.
- martensite volume is 20 volumes. /. If it is less than 1%, the tensile strain of 1% to 2% applied in the shape correction stage exceeds the accumulated amount of transformation strain, and a Ruder's band appears on the steel strip surface. Low martensite content means excess soft ferrite, It tends to run out.
- Average particle size of former austenite 10um or less
- the grain size of martensite and ferrite generated in the cooling stage of the annealing process is reduced, and the martensitic transformation region is dispersed, so that the strain accompanying martensitic transformation is uniformly dispersed.
- the uniform dispersion of the transformation strain and, consequently, the suppression of the Ruders band can be made effective by reducing the average particle size of the former austenite to ⁇ or less.
- the crystal structure changes from f.c. to b.c.c. or b.c.t.
- the atomic packing of the crystal structure changes and the stainless steel strip undergoes transformation expansion.
- the expansion rate due to the transformation is not simply proportional to the amount of martensite generated by the transformation, but depends on the distribution of martensite and fluoride.
- the average grain size of the former austenite is smaller and the grain boundary area of the transformed martensite ferrite is larger, in other words, as the transformed martensite is more finely distributed, the transformation strain is absorbed by the surrounding soft ferrite and the inside of the ferrite Transformation strain is accumulated in
- Transformation By utilizing the effect of martensite refinement to suppress transformation distortion, non-uniform deformation at the time of steel belt straightening is prevented, and no reuse band is generated.
- the former austenite is refined to an average grain size of ⁇ or less, the grain size of the transformed martensitic ferrite is reduced, the grain boundary area of martensite ferrite is increased, and the average expansion is increased. Must be 9% or less.
- HV300 above By adjusting the C and Ni contents and the martensite content, the hardness of the duplex stainless steel is refined, but high responsiveness in the operating environment, high speed, and high fatigue strength due to the use of small pulleys are required. For use as a steel belt, a material hardness of HV300 or more is required. Next, the present invention will be specifically described with reference to examples.
- Stainless steel having the composition shown in Table 1 was vacuum-melted, forged, forged, and hot-rolled to a thickness of 3.0 mm.
- steel type numbers No .:! To 5 are stainless steels having the composition specified in the present invention
- steel type numbers Nos. 6 to 8 are stainless steels having compositions outside the range specified in the present invention.
- Comparative steel No. 8 which has an excessive Ni content, has a large amount of retained austenite, and a work-induced martensitic transformation occurs during tensile deformation, resulting in the formation of a ruder band.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Belt Conveyors (AREA)
- Package Frames And Binding Bands (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/480,205 US20040168750A1 (en) | 2001-06-11 | 2002-06-06 | Double phase stainless steel strip for steel belt |
KR10-2003-7013354A KR20040014492A (ko) | 2001-06-11 | 2002-06-06 | 스틸 벨트용 복상 스테인레스 강대 |
DE60205896T DE60205896D1 (de) | 2001-06-11 | 2002-06-06 | Band aus doppelphasigem nichtrostendem stahl für stahlriemen |
JP2003503853A JP4252893B2 (ja) | 2001-06-11 | 2002-06-06 | スチールベルト用複相ステンレス鋼帯 |
AT02738626T ATE303458T1 (de) | 2001-06-11 | 2002-06-06 | Band aus doppelphasigem nichtrostendem stahl für stahlriemen |
EP02738626A EP1396552B1 (en) | 2001-06-11 | 2002-06-06 | Double phase stainless steel strip for steel belt |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001175109 | 2001-06-11 | ||
JP2001-175109 | 2001-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002101108A1 true WO2002101108A1 (fr) | 2002-12-19 |
Family
ID=19016298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/005572 WO2002101108A1 (fr) | 2001-06-11 | 2002-06-06 | Bande d'acier inoxydable double phase pour ceinture d'acier |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040168750A1 (ja) |
EP (1) | EP1396552B1 (ja) |
JP (1) | JP4252893B2 (ja) |
KR (1) | KR20040014492A (ja) |
CN (1) | CN1227383C (ja) |
AT (1) | ATE303458T1 (ja) |
DE (1) | DE60205896D1 (ja) |
WO (1) | WO2002101108A1 (ja) |
Cited By (3)
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JP2006274391A (ja) * | 2005-03-30 | 2006-10-12 | Nisshin Steel Co Ltd | ひずみ検出センサー基板用ステンレス鋼 |
JP2009091614A (ja) * | 2007-10-08 | 2009-04-30 | Daido Steel Co Ltd | 2相ステンレス鋼、並びに、これを用いた条鋼、鋼線、線材、及び、鋼製部品 |
JP2016079482A (ja) * | 2014-10-20 | 2016-05-16 | 新日鐵住金株式会社 | 複相ステンレス鋼およびその製造方法 |
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JP2005248263A (ja) * | 2004-03-04 | 2005-09-15 | Daido Steel Co Ltd | マルテンサイト系ステンレス鋼 |
FR2872825B1 (fr) * | 2004-07-12 | 2007-04-27 | Industeel Creusot | Acier inoxydable martensitique pour moules et carcasses de moules d'injection |
KR101606946B1 (ko) * | 2008-02-07 | 2016-03-28 | 닛신 세이코 가부시키가이샤 | 고강도 스테인리스 강재 및 그 제조 방법 |
CN101867234B (zh) * | 2009-01-13 | 2014-12-10 | 日新制钢株式会社 | 磁滞式电动机以及磁滞式电动机用转子的制造方法 |
KR20130105721A (ko) | 2011-01-27 | 2013-09-25 | 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 | 합금 원소 절감형 2상 스테인리스 열연 강재, 클래드재로서 2상 스테인리스강을 구비하는 클래드 강판 및 그들의 제조 방법 |
BR112013020445B1 (pt) * | 2011-02-14 | 2019-08-13 | Nippon Steel & Sumitomo Metal Corp | aço inoxidável dúplex e método de produção para o mesmo |
KR101632516B1 (ko) * | 2011-10-21 | 2016-06-21 | 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 | 2상 스테인리스강, 2상 스테인리스강 주조편 및 2상 스테인리스강 강재 |
US9631249B2 (en) | 2011-11-28 | 2017-04-25 | Nippon Steel & Sumitomo Metal Corporation | Stainless steel and method for manufacturing same |
WO2015064128A1 (ja) * | 2013-10-31 | 2015-05-07 | Jfeスチール株式会社 | 低温靭性に優れたフェライト−マルテンサイト2相ステンレス鋼およびその製造方法 |
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AT516453B1 (de) * | 2014-11-03 | 2018-02-15 | Berndorf Band Gmbh | Metallische Bänder und deren Herstellungsverfahren |
JP6129140B2 (ja) * | 2014-11-05 | 2017-05-17 | 日新製鋼株式会社 | 拡散接合用ステンレス鋼材 |
KR101988277B1 (ko) * | 2015-04-21 | 2019-06-12 | 제이에프이 스틸 가부시키가이샤 | 마르텐사이트계 스테인리스 냉연판 |
KR102169859B1 (ko) * | 2016-04-12 | 2020-10-26 | 제이에프이 스틸 가부시키가이샤 | 마텐자이트계 스테인리스 강판 |
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CN109457193A (zh) * | 2018-11-16 | 2019-03-12 | 襄阳五二五泵业有限公司 | 一种耐磨双相不锈钢 |
CN111763893A (zh) * | 2020-07-13 | 2020-10-13 | 南阳师范学院 | 一种耐腐蚀复合金属材料及其制备方法 |
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2002
- 2002-06-06 DE DE60205896T patent/DE60205896D1/de not_active Expired - Lifetime
- 2002-06-06 CN CNB028115821A patent/CN1227383C/zh not_active Expired - Fee Related
- 2002-06-06 WO PCT/JP2002/005572 patent/WO2002101108A1/ja active IP Right Grant
- 2002-06-06 KR KR10-2003-7013354A patent/KR20040014492A/ko not_active Application Discontinuation
- 2002-06-06 JP JP2003503853A patent/JP4252893B2/ja not_active Expired - Lifetime
- 2002-06-06 US US10/480,205 patent/US20040168750A1/en not_active Abandoned
- 2002-06-06 EP EP02738626A patent/EP1396552B1/en not_active Expired - Lifetime
- 2002-06-06 AT AT02738626T patent/ATE303458T1/de not_active IP Right Cessation
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WO1995013405A1 (fr) * | 1993-11-12 | 1995-05-18 | Nisshin Steel Co., Ltd. | Acier inoxydable a deux phases a ductilite elevee et a forte resistance et procede de production de ce dernier |
JPH09263912A (ja) * | 1996-03-29 | 1997-10-07 | Nisshin Steel Co Ltd | 打抜き加工用高強度複相組織クロムステンレス鋼板およびその製造方法 |
JPH10265907A (ja) * | 1997-03-25 | 1998-10-06 | Nippon Kinzoku Co Ltd | 耐応力腐食性、強度及び靱性に優れた鋼及びその製造方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006274391A (ja) * | 2005-03-30 | 2006-10-12 | Nisshin Steel Co Ltd | ひずみ検出センサー基板用ステンレス鋼 |
JP2009091614A (ja) * | 2007-10-08 | 2009-04-30 | Daido Steel Co Ltd | 2相ステンレス鋼、並びに、これを用いた条鋼、鋼線、線材、及び、鋼製部品 |
JP2016079482A (ja) * | 2014-10-20 | 2016-05-16 | 新日鐵住金株式会社 | 複相ステンレス鋼およびその製造方法 |
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Publication number | Publication date |
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EP1396552A1 (en) | 2004-03-10 |
ATE303458T1 (de) | 2005-09-15 |
DE60205896D1 (de) | 2005-10-06 |
US20040168750A1 (en) | 2004-09-02 |
CN1227383C (zh) | 2005-11-16 |
EP1396552B1 (en) | 2005-08-31 |
JPWO2002101108A1 (ja) | 2004-09-24 |
JP4252893B2 (ja) | 2009-04-08 |
CN1514885A (zh) | 2004-07-21 |
KR20040014492A (ko) | 2004-02-14 |
EP1396552A4 (en) | 2004-12-22 |
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