CN100545292C - Austenitic stainless steel composition and the purposes in producing land conveying tools structural parts and freight container thereof - Google Patents

Austenitic stainless steel composition and the purposes in producing land conveying tools structural parts and freight container thereof Download PDF

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Publication number
CN100545292C
CN100545292C CNB2004800434467A CN200480043446A CN100545292C CN 100545292 C CN100545292 C CN 100545292C CN B2004800434467 A CNB2004800434467 A CN B2004800434467A CN 200480043446 A CN200480043446 A CN 200480043446A CN 100545292 C CN100545292 C CN 100545292C
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China
Prior art keywords
steel
purposes
composition
freight container
elongation
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Expired - Fee Related
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CNB2004800434467A
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CN101068944A (en
Inventor
F·黑格里
N·阿克杜特
P·采南
R·蒂斯
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Aperam Stainless France SA
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Ugine et Alz France SA
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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
    • C22C38/42—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

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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 Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to austenitic stainless steel composition, it contains by weight percentage: C≤0.03%, 14%≤Cr≤17%, 8%≤Ni≤10%, 2.0%≤Mo≤3.5%, Mn≤2.0%, Si≤1.0%, N≤0.20%, Cu≤1.0%, Ti≤0.01%, Co≤0.5%, Sn≤0.4%, P≤0.045%, S≤0.030%, remaining part are by iron and produce the unavoidable impurities of bringing.The invention still further relates to the purposes of described composition in producing freight container and land conveying tools structure unit.

Description

Austenitic stainless steel composition and the purposes in producing land conveying tools structural parts and freight container thereof
Technical field
The present invention relates to improved steel compositions, it can be used to produce the structural parts of land conveying tools especially, and the freight container (container) that is used to produce all industrial types, for example as the freight container of chemical industry or agricultural production food-processing industry.
More generally, this novel composition can be advantageously used in all needs very big absorption energy potential (especially under unexpected situation) and good anti-tubercular corrosion and anti-time body corrosive to use.
Background technology
The problem of weight reduction is the worried all the time problem of general transportation means manufacturers, particularly conveying trough manufacturers and user.For example, because truck is subjected to the restriction of weight, always some can reduce its structural weight to these truckmakers in searching, improve the shipping products volume simultaneously and reduce the technology terms of settlement of making the required steel consumption of groove and reducing used steel plate thickness.
On the other hand, do not wish to reduce the security of these trucies,, then just can allow to reduce steel plate thickness if the absorption energy potential of this steel has raising.This absorption energy potential also is referred to as impact resistance, can estimate with the long-pending value of Rm * A, and wherein Rm represents the steel tensile strength of representing with MPa, the steel elongation that the A representative is represented with %.It improves and therefore depends on this two factors and variation thereof.
In addition, people may not wish that the solidity to corrosion of steel reduces, and acidic liquid is often being arranged, even especially like this in the application of the chemistry of corrosive liquid storage and transportation or agricultural production food processing field.
Existing these steel trades mark can not satisfy the requirement of high impact resistance and good corrosion resistance simultaneously on the market.Therefore, the trade mark of 301,301 LN, 304 or 305 classes does not have good solidity to corrosion characteristic, and the 316 dual phase steel trades mark do not satisfy gratifying impact resistance.
Summary of the invention
Consider these aspects, the objective of the invention is to propose a kind of improved steel compositions, it has good anti-tubercular corrosion and time body corrosive property, and the energy absorption potentiality higher than the prior art steel trade mark.
First theme of the present invention is made of austenitic stainless steel composition, and said composition contains in weight %:
C≤0.03％
14％≤Cr≤17％
8％≤Ni≤10％
2.0％≤Mo≤3.5％
Mn≤2.0％
Si≤1.0％
N≤0.20％
Cu≤1.0％
Ti≤0.01％
Co≤0.5％
Sn≤0.4％
P≤0.045％
S≤0.030％
Surplus is to constitute by iron with by the unavoidable impurities that production brings.
This steel compositions of the present invention can access the stainless steel with austenitic structure, but its austenite is very unstable (Md value) at room temperature, and its solidity to corrosion and trade mark 316L are same levels, it is especially true to relate to tubercular corrosion, also can have good working ability by the control delta ferrite level.
Steel compositions of the present invention can also have following supplementary features (single or combination):
-this steel compositions contains the chromium less than 16.0%.
-this steel compositions contains the nickel less than 9.5%.
-this steel compositions has the austenitic index of stability value Md30 that determines with following formula:
Md30＝497-462(％C+％N)-9.2×％Si-8.1×％Mn-13.7×％Cr-20×％Ni-18.5×％Mo
Be-130 to+90 ℃, preferably 0-60 ℃, more particularly preferably 0-30 ℃.
The delta ferrite level of-this steel compositions is less than or equal to 7%,
The long-pending value of the Rm * A of-this steel compositions is preferably more than 34000 greater than 32000, and wherein Rm is the tensile strength of this steel, and A is the elongation of this steel.
Second theme of the present invention is to be made of in the purposes of making freight container and making in the land conveying tools structural parts steel of the present invention.
In the application's scope, land conveying tools should be appreciated that it is Motor vehicles, but also should be appreciated that it is the transportation by railroad instrument of any kind of.The freight container of indication of the present invention can be used to transport liquid, solid or the gaseous matter of any kind of especially, for example as acid, breast or wine.
Embodiment
Describe the present invention now in detail, the scope of claim is not subjected to the restriction of this description certainly.
Austenitic stainless steel composition of the present invention contains and is up to 0.03% carbon.In a preferred implementation, carbon content is 0.022-0.027%.
Said composition also contains chromium, and its content is 14-17%, preferably 14-16.5%, more particularly preferably 14-16.0%, 15-15.2% better.Chromium is the corrosion proof essential element of this trade mark steel.The stability that influences austenitic structure because of chromium should limit its content.
Said composition also contains nickel, and its content is 8-10%, preferably 8-9.5%, more particularly preferably 8-9.0%, 8.9-9.1% better.The main effect of this element is that it is to anti-time body corrosive advantageous effect.Limit its content because of it is expensive with its influence to austenitic structure stability.
Said composition also contains molybdenum, and its content is 2.0-3.5%, preferably 2.0-3.0%, more particularly preferably 2.9-3.1%.This element can improve the solidity to corrosion of this trade mark steel, particularly anti-tubercular corrosion, but should limit its content because of its sclerization.
Said composition can also contain and be up to 2.0% manganese, advantageously is up to 1.45% manganese.In a preferred implementation, manganese content is 1.3-1.45%.
Said composition can also contain and be up to 1.0% silicon, advantageously is up to 0.5% silicon.In a preferred implementation, silicone content is 0.35-0.5%.This element can be used as reductor when producing this trade mark steel, but because of it has adverse influence to be limited to this trade mark steel formability.
Said composition can also contain nitrogen, and its maximum level is 0.20%, and preferably 0.03%.In a preferred implementation, nitrogen content is 0.02-0.03%.
This element has sclerization when existing with sosoloid in steel.So it can help to improve tensile strength Rm, but it reduces elongation A value simultaneously.Therefore, its add-on should be limited in the scope of above-mentioned value.
Said composition can also contain copper, and its maximum level is 1.0%, and preferably 0.4%.Copper also plays the effect of hardening element when existing with sosoloid in steel.The content of copper plays negative impact because of it to the solidity to corrosion of this trade mark steel, and its hot formability is also played negative impact and is limited in 0.4%.
At last, said composition can contain relict element, titanium for example, and its maximum level is 0.01%, cobalt, its maximum level is 0.5%, tin, its maximum level is 0.4%, phosphorus, its maximum level is 0.045% and sulphur, its maximum level is 0.030%.
Content with sulphur is restricted to 0.030% especially, and preferably 0.0080%, more particularly preferably 0.0060%, because it has adverse influence to solidity to corrosion.In addition, it may be easy to combine the MnS type impurity that generation is not expected with manganese.
Embodiment
Mechanical characteristics
Produce the steel that table 1 compiles its composition, continuous casting becomes bloom slab then, and heat is rolled until reaching thickness 8mm.The band that heat is rolled is annealed cold then rolling until reaching final thickness 4.2mm more continuously under 1150 ℃ of temperature.
These are cold rolls band and anneals continuously under 1040 ℃ of temperature.
Measured each cold mechanical characteristics of rolling band, and come together in the table 2.
Adopt following abbreviation:
-A: represent the elongation of steel, represent with %,
-Rm: represent the tensile strength of steel, represent with MPa,
-Δ: represent delta ferrite level, represent with %, adopt the RX diffractometry after electropolishing, the composition of steel A and B is of the present invention, and the composition of steel C is the comparative example.
Table 1
Steel C ％ Cr ％ Ni ％ Mo ％ Mn ％ Si ％ N ％ Cu ％ P ％ S ppm
A 0.026 15.14 8.92 2.99 1.36 0.38 0.032 0.23 0.023 90
B 0.020 15.47 9.08 3.01 1.5 0.39 0.037 0.17 0.025 20
C 0.029 17.3 11.1 2.06 1.36 0.46 0.019 0.29 0.03 40
Table 2
Steel Rm (MPa) A (％) Rm×A Particle size (ASTM) Δ (％) Md30 (℃)
A 615 60 36900 8.5 4.5 +14.559
B 610 62 37820 9 5 +5.704
C 623 49 30527 10 7 -37.544
Solidity to corrosion
Measured the anti-tubercular corrosion and time body corrosion of sample according to following method:
Tubercular corrosion
According to standard A STM G 61, these steel samples flood in the solution that contains 0.5M NaCl, and this solution is 23 ℃ of pH 6.6 and temperature.Then, these samples carry out wet-milling with 1200 SiC sand paper.
Set out by free corrosion potential, estimated the fracture potential energy of each sample with speed 100mV/min.Last electric current is 50 μ A/cm 2
All over the body corrosion
According to standard A STM G 61, these steel samples are containing 2M H 2SO 4Solution under 23 ℃ of temperature, flood.Then, these samples carry out wet-milling with 1200 SiC sand paper.
Then, at speed 10mV/min, estimated the critical current (current maxima that reaches in mutually in activity) of each sample under the-750mV/ECS to 1200mV/ECS, and estimated weight loss.
Adopted following abbreviation:
-BP: representative is represented with mV with respect to the fracture potential energy of ECS (saturated calomel electrode).
-CC: represent critical current, with μ A/cm 2Expression.
-WL: represent weight loss, represent with mm/.
These corrosion tests are the result come together in the table 3.
Table 3
Steel BP (mV/ECS) CC (μA/cm 2) WL (mm/)
B 485 16.6 0.19
C 465 15.8 0.19
Can see that according to these tests steel compositions of the present invention can reach the very high long-pending level of Rm * A, mainly owing to the improvement of elongation, Rm value then keeps stablizing for this.This attendant advantages of improving elongation values is to produce freight container after helping, because the easier moulding of this steel.
Low delta ferrite level also helps the weldability and the solidity to corrosion of this trade mark steel.
This new steel compositions can significantly reduce produces the desired steel plate thickness of freight container, reduces its cost like this, but can increase the traffic load amount, also may conserve energy when this freight container sky returns.
Therefore, can point out that steel plate thickness reduces 0.1mm can increase 35kg traffic load amount.If consider the performance of trade mark steel of the present invention, can realize that in most of the cases steel plate thickness reduces 0.2mm.

Claims (11)

1. the austenitic stainless steel composition purposes that is used to produce the structural parts of land conveying tools or is used to produce freight container, said composition contains in weight %:
C≤0.03％
14％≤Cr≤17％
8％≤Ni＜9.5％
2.0％≤Mo≤3.5％
Mn≤2.0％
Si≤1.0％
N≤0.20％
Cu≤1.0％
Ti≤0.01％
Co≤0.5％
Sn≤0.4％
P≤0.045％
S≤0.030％
Surplus is to constitute by iron with by the unavoidable impurities that production brings.
2. purposes according to claim 1, said composition also contains 14%≤Cr＜16.0%.
3. purposes according to claim 1, said composition also contain in weight %:
0.022％C≤0.027％
15％≤Cr≤15.2％
8.9％≤Ni≤9.1％
2.9％≤Mo≤3.1％
1.3％≤Mn≤1.45％
0.35％≤Si≤0.5％
0.02％≤N≤0.03％
Cu≤0.4％
Ti≤0.01％
Co≤0.5％
Sn≤0.4％
P≤0.045％
S≤0.030％
Surplus is to constitute by iron with by the unavoidable impurities that production brings.
4. according to the described purposes of each claim in claim 1 and 3, it is characterized in that the austenitic index of stability value Md30 that determines with following formula:
Md30＝497-462(％C+％N)-9.2×％Si-8.1×％Mn-13.7×％Cr-20×％Ni-18.5×％Mo
It is-130 to+90 ℃.
5. purposes according to claim 4 is characterized in that the austenitic index of stability value Md30 that determines with following formula:
Md30＝497-462(％C+％N)-9.2×％Si-8.1×％Mn-13.7×％Cr-20×％Ni-18.5×％Mo
It is 0-60 ℃.
6. according to the described purposes of each claim in claim 1 and 3, it is characterized in that the delta ferrite level of said composition is less than or equal to 7%.
7. according to the described purposes of each claim in claim 1 and 3, it is characterized in that the long-pending value of Rm * A greater than 32000, wherein Rm is the tensile strength of steel, and A is the elongation of steel.
8. purposes according to claim 7 is characterized in that the long-pending value of Rm * A greater than 34000, and wherein Rm is the tensile strength of steel, and A is the elongation of steel.
9. purposes according to claim 2 is characterized in that the long-pending value of Rm * A greater than 32000, and wherein Rm is the tensile strength of steel, and A is the elongation of steel.
10. purposes according to claim 1 is characterized in that the long-pending value of Rm * A greater than 32000, and wherein Rm is the tensile strength of steel, and A is the elongation of steel.
11. purposes according to claim 4 is characterized in that the long-pending value of Rm * A greater than 32000, wherein Rm is the tensile strength of steel, and A is the elongation of steel.
CNB2004800434467A 2004-07-08 2004-07-08 Austenitic stainless steel composition and the purposes in producing land conveying tools structural parts and freight container thereof Expired - Fee Related CN100545292C (en)

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PCT/FR2004/001796 WO2006016010A1 (en) 2004-07-08 2004-07-08 Austenitic stainless steel composition and use thereof for the production of structural parts for land transport means and containers

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AT (1) ATE422559T1 (en)
DE (1) DE602004019454D1 (en)
ES (1) ES2320224T3 (en)
SI (1) SI1766101T1 (en)
WO (1) WO2006016010A1 (en)

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AUPO903897A0 (en) 1997-09-08 1997-10-02 Commonwealth Scientific And Industrial Research Organisation Organic boronic acid derivatives
FI122657B (en) * 2010-04-29 2012-05-15 Outokumpu Oy Process for producing and utilizing high formability ferrite-austenitic stainless steel
JP6029662B2 (en) * 2013-12-09 2016-11-24 新日鐵住金株式会社 Austenitic stainless steel sheet and manufacturing method thereof
CN113388790B (en) * 2021-06-08 2022-11-25 常州腾飞特材科技有限公司 06Cr19Ni10N austenitic stainless steel pipe and production process thereof
CN114318145A (en) * 2021-12-24 2022-04-12 浦项(张家港)不锈钢股份有限公司 Stainless steel strip blank for ultra-long precision spring, precision stainless steel strip and application
CN115948703A (en) * 2022-12-26 2023-04-11 浦项(张家港)不锈钢股份有限公司 High-sulfur 316L stainless steel, preparation process and application

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CN1059598A (en) * 1990-08-27 1992-03-18 上海钢铁研究所 Hydrogen-oxygen nitrogen standard model and preparation technology thereof in the steel
CN1113088A (en) * 1993-07-08 1995-12-06 旭精工株式会社 Stainless steel for coins and method for manufacturing stainless steel coins
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ES2320224T3 (en) 2009-05-20
ATE422559T1 (en) 2009-02-15
CN101068944A (en) 2007-11-07
SI1766101T1 (en) 2009-06-30
EP1766101B1 (en) 2009-02-11
EP1766101A1 (en) 2007-03-28
DE602004019454D1 (en) 2009-03-26
WO2006016010A1 (en) 2006-02-16

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