EP1766101A1 - Composition d'acier inoxydable austenitique et son utilisation pour la fabrication de pieces de structure de moyens de transport terrestres et de containers - Google Patents
Composition d'acier inoxydable austenitique et son utilisation pour la fabrication de pieces de structure de moyens de transport terrestres et de containersInfo
- Publication number
- EP1766101A1 EP1766101A1 EP04767628A EP04767628A EP1766101A1 EP 1766101 A1 EP1766101 A1 EP 1766101A1 EP 04767628 A EP04767628 A EP 04767628A EP 04767628 A EP04767628 A EP 04767628A EP 1766101 A1 EP1766101 A1 EP 1766101A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel
- steel composition
- composition
- austenitic stainless
- stainless steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Definitions
- the present invention relates to an improved steel composition which can in particular be used for the manufacture of structural parts of land transport means, as well as for the manufacture of containers for all types of industries, such as, for example, the chemical industry or the agri-food industry.
- this new composition can be advantageously used for all applications requiring a large potential for energy absorption, especially in case of accidents, as well as good resistance to pitting and corrosion corrosion. widespread.
- the problem of weight reduction is a constant concern for the manufacturers of means of transport in general, and in particular for the manufacturers and the users of transport tanks. Because of the weight limitations imposed on trucks, for example, the manufacturers of these trucks are constantly seeking technical solutions to reduce the weight of the structure, while increasing the volume of products transported and reducing the amount of steel. necessary for the manufacture of a tank, by reducing the thickness of the steel sheets used.
- a degradation of the corrosion resistance of the steel can not be envisaged, in particular for applications in the fields of chemistry or agri-food where the storage and transport of acidic liquids, even corrosive, is common.
- the steel grades available on the market do not meet both the requirements for improved crash resistance and good resistance against corrosion.
- the type 301, 301 LN, 304 or 305 grades do not have good corrosion resistance characteristics, while the 316 duplex steel grades do not have satisfactory crash resistance.
- the object of the present invention is to provide an improved steel composition having good pitting corrosion and generalized corrosion resistance characteristics as well as an absorption potential. higher energy than the steel grades of the prior art.
- a first subject of the invention consists of a composition of austenitic stainless steel, comprising, in% by weight:
- the steel composition according to the invention makes it possible to obtain a stainless steel with an austenitic structure, but whose austenite is sufficiently unstable at ambient temperature (Md value), and which has a corrosion resistance at the same level as that of 316L, in particular with regard to pitting corrosion, and good processability by controlling the delta ferrite content.
- the steel composition according to the invention may also have the following additional characteristics, taken alone or in combination:
- the steel composition comprises less than 16.0% of chromium
- the steel composition comprises less than 9.5% nickel.
- the steel composition has a stability index value of austenite Md30, defined by the formula:
- Md30 497-462 (% C +% N) - 9.2x% Si - 8.1x% Mn -13.7x% Cr - 20 x% Ni -18.5x% Mo between -130 and + 9OC, preferably between 0 and 600 ° C., and more particularly preferably between 0 and 30 ° C.
- the steel composition has a delta ferrite content of less than or equal to 7%, -
- the steel composition has a value of the product Rm x A, in which Rm is the tensile strength of the steel and A 1 elongation of the steel, greater than 32,000, preferably greater than 34,000.
- a second object of the invention is constituted by the use of the steel according to the invention for the manufacture of containers and for the manufacture of structural parts of terrestrial transport means.
- the austenitic stainless steel composition according to the invention comprises up to 0.03% carbon.
- the carbon content is between 0.022 and 0.027%.
- composition also comprises chromium in a
- Chromium is an essential element for the corrosion resistance of the grade. Its content is limited because of its influence on the stability of the austenitic structure.
- the composition also comprises nickel at a content of 8 to 10%, preferably between 8 and 9.5%, more preferably between 8 and 9.0%, and better still between 8.9 and 9.1%. .
- the main effect of this element is its favorable action on the resistance to generalized corrosion. Its content is limited because of its high cost and its influence on the stability of the austenitic structure.
- composition further comprises molybdenum at a content of
- This element makes it possible to improve the resistance to corrosion, in particular the pitting resistance of the grade, but must be limited because of its curing effect.
- the composition may also comprise up to 2.0% of manganese and advantageously up to 1.45% of manganese.
- the manganese content is between 1.3 and 1.55%.
- the composition may also comprise up to 1.0% silicon and advantageously up to 0.5% silicon.
- the silicon content is between 0.35 and 0.5%. This element can be used as a deoxidizing agent during the shaping of the grade, but must be limited because of its detrimental influence on the formability of the grade.
- the composition may also comprise nitrogen at a maximum content of 0.20%, preferably 0.03%. In a preferred embodiment, the nitrogen content is between 0.02 and 0.03%. This element has a hardening effect when present in solid solution in steel. It can thus participate in increasing the tensile strength Rm, but at the same time decreases the value of the elongation A. Its addition is therefore limited to the values mentioned above.
- the composition may also contain copper at a maximum level of 1.0%, and preferably 0.4%. Copper also acts as a hardening element when present in solid solution. Its content is limited to 0.4% because of its negative influence on the corrosion resistance but also on the hot formability of the grade.
- the composition may finally contain residual elements, such as titanium at a maximum content of 0.01%, cobalt at a maximum content of 0.5%, tin at a maximum content of 0.4%, phosphorus in a maximum content of 0.045% and sulfur in a maximum of 0.030%.
- residual elements such as titanium at a maximum content of 0.01%, cobalt at a maximum content of 0.5%, tin at a maximum content of 0.4%, phosphorus in a maximum content of 0.045% and sulfur in a maximum of 0.030%.
- the sulfur content is limited to 0.030%, preferably to 0.0080%, and more preferably to 0.0060%, because of its detrimental effect on the corrosion resistance.
- it can combine easily with manganese to generate MnS inclusions that are not desired.
- ⁇ represents the delta ferrite content, expressed in%, and measured by X-ray diffraction after electropolishing.
- the steel compositions A and B are according to the present invention, while the steel composition C is a comparative example.
- the steel samples were soaked in a solution containing 0.5M NaCl and having a pH of 6.6 and a temperature of 23 ° C. The samples were then milled in the wet state with 1200 SiC abrasive paper.
- the rupture potential of each sample was then evaluated at a rate of 100 rnV / min, starting from the free corrosion potential.
- the end flow was 50 ⁇ A / cm 2 .
- the steel samples were soaked in a solution containing 2M H 2 SO 4 at a temperature of 23 ° C.
- the samples were then milled in the wet state with a 1200-grit sandpaper. SiC.
- the critical current (maximum current value reached in the active phase) of each sample was then evaluated at a rate of 10 mV / min, from -750 mV / ECS to 1200 mV / ECS and the weight loss was evaluated.
- BP represents the rupture potential, expressed in mV with respect to the ECS (saturated calomel electrode),
- CC represents the critical current, expressed in ⁇ A / cm 2 .
- the steel composition according to the invention makes it possible to reach very high levels of the RmxA product, mainly because of an improvement in elongation, the value of Rm remaining stable. .
- This improved elongation value has the additional advantage of facilitating the subsequent manufacture of containers because the steel is more easily formable.
- the low delta ferrite content is further favorable for the weldability and corrosion resistance of the grade.
- This new steel composition significantly reduces the thickness of the steel sheets required for the manufacture of a container, which reduces its cost, increases the transportable load and also saves energy when the container goes empty.
- a reduction of 0.1 mm in thickness of the sheet represents an increase of 35 kg of the transportable load.
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)
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200431065T SI1766101T1 (sl) | 2004-07-08 | 2004-07-08 | Sestava avstenitnega nerjavnega jekla in njegova uporaba za izdelavo strukturnih delov za sredstva za kopenski transport zabojnikov |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FR2004/001796 WO2006016010A1 (fr) | 2004-07-08 | 2004-07-08 | Composition d'acier inoxydable austenitique et son utilisation pour la fabrication de pieces de structure de moyens de transport terrestres et de containers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1766101A1 true EP1766101A1 (fr) | 2007-03-28 |
EP1766101B1 EP1766101B1 (fr) | 2009-02-11 |
Family
ID=34958744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04767628A Not-in-force EP1766101B1 (fr) | 2004-07-08 | 2004-07-08 | Composition d'acier inoxydable austenitique et son utilisation pour la fabrication de pieces de structure de moyens de transport terrestres et de containers |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1766101B1 (fr) |
CN (1) | CN100545292C (fr) |
AT (1) | ATE422559T1 (fr) |
DE (1) | DE602004019454D1 (fr) |
ES (1) | ES2320224T3 (fr) |
SI (1) | SI1766101T1 (fr) |
WO (1) | WO2006016010A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPO903897A0 (en) | 1997-09-08 | 1997-10-02 | Commonwealth Scientific And Industrial Research Organisation | Organic boronic acid derivatives |
FI122657B (fi) * | 2010-04-29 | 2012-05-15 | Outokumpu Oy | Menetelmä korkean muokattavuuden omaavan ferriittis-austeniittisen ruostumattoman teräksen valmistamiseksi ja hyödyntämiseksi |
JP6029662B2 (ja) * | 2013-12-09 | 2016-11-24 | 新日鐵住金株式会社 | オーステナイト系ステンレス鋼板およびその製造方法 |
CN113388790B (zh) * | 2021-06-08 | 2022-11-25 | 常州腾飞特材科技有限公司 | 一种06Cr19Ni10N奥氏体不锈钢管及其生产工艺 |
CN114318145A (zh) * | 2021-12-24 | 2022-04-12 | 浦项(张家港)不锈钢股份有限公司 | 一种超长精密弹簧用不锈钢带坯料、精密不锈钢带及应用 |
CN115948703A (zh) * | 2022-12-26 | 2023-04-11 | 浦项(张家港)不锈钢股份有限公司 | 一种高硫316l不锈钢、制备工艺及应用 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4863682A (en) * | 1988-03-11 | 1989-09-05 | General Electric Company | Austenitic stainless steel alloy |
CN1024375C (zh) * | 1990-08-27 | 1994-04-27 | 上海钢铁研究所 | 钢中氢氧氮标准样品的制备方法 |
JPH0693382A (ja) * | 1991-08-16 | 1994-04-05 | Nippon Steel Corp | クリープ破断延性のすぐれたNi−Crオーステナイト系ステンレス鋼 |
JPH0550288A (ja) * | 1991-08-22 | 1993-03-02 | Nippon Steel Corp | クリープ破断強度及び耐脆化性の優れたオーステナイト系ステンレス鋼溶接材料 |
KR960014516B1 (ko) * | 1992-04-16 | 1996-10-16 | 신니뽄 세이데스 가부시끼가이샤 | 표면품질이 우수한 오오스테나이트계 스테이레스강 박판 및 그의 제조방법 |
TW290592B (fr) * | 1993-07-08 | 1996-11-11 | Asahi Seiko Co Ltd | |
KR950009223B1 (ko) * | 1993-08-25 | 1995-08-18 | 포항종합제철주식회사 | 프레스 성형성, 열간가공성 및 고온내산화성이 우수한 오스테나이트계 스테인레스강 |
US5494537A (en) * | 1994-02-21 | 1996-02-27 | Nisshin Steel Co. Ltd. | High strength and toughness stainless steel strip and process for the production of the same |
JP3464297B2 (ja) * | 1994-08-31 | 2003-11-05 | 日新製鋼株式会社 | 高速温間絞り成形用オーステナイト系ステンレス鋼板およびその温間絞り成型法 |
US5686044A (en) * | 1995-03-31 | 1997-11-11 | Nippon Yakin Kogyo Co., Ltd. | Austenitic stainless steels for press forming |
US5512238A (en) * | 1995-06-07 | 1996-04-30 | Crs Holdings, Inc. | Free-machining austenitic stainless steel |
JP3691341B2 (ja) * | 2000-05-16 | 2005-09-07 | 日新製鋼株式会社 | 精密打抜き性に優れたオーステナイト系ステンレス鋼板 |
-
2004
- 2004-07-08 ES ES04767628T patent/ES2320224T3/es active Active
- 2004-07-08 CN CNB2004800434467A patent/CN100545292C/zh not_active Expired - Fee Related
- 2004-07-08 DE DE602004019454T patent/DE602004019454D1/de active Active
- 2004-07-08 AT AT04767628T patent/ATE422559T1/de active
- 2004-07-08 EP EP04767628A patent/EP1766101B1/fr not_active Not-in-force
- 2004-07-08 SI SI200431065T patent/SI1766101T1/sl unknown
- 2004-07-08 WO PCT/FR2004/001796 patent/WO2006016010A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006016010A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE422559T1 (de) | 2009-02-15 |
SI1766101T1 (sl) | 2009-06-30 |
CN101068944A (zh) | 2007-11-07 |
CN100545292C (zh) | 2009-09-30 |
WO2006016010A1 (fr) | 2006-02-16 |
ES2320224T3 (es) | 2009-05-20 |
DE602004019454D1 (de) | 2009-03-26 |
EP1766101B1 (fr) | 2009-02-11 |
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