EP1563109B1 - Piece d'acier de construction soudable et procede de fabrication - Google Patents
Piece d'acier de construction soudable et procede de fabrication Download PDFInfo
- Publication number
- EP1563109B1 EP1563109B1 EP03789464A EP03789464A EP1563109B1 EP 1563109 B1 EP1563109 B1 EP 1563109B1 EP 03789464 A EP03789464 A EP 03789464A EP 03789464 A EP03789464 A EP 03789464A EP 1563109 B1 EP1563109 B1 EP 1563109B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- steel
- less
- bainitic
- weldable
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 14
- 229910000746 Structural steel Inorganic materials 0.000 title claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 238000001816 cooling Methods 0.000 claims description 22
- 229910052804 chromium Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- 229910052721 tungsten Inorganic materials 0.000 claims description 17
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 16
- 229910052796 boron Inorganic materials 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims description 12
- 239000010936 titanium Substances 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910000734 martensite Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- 229910001566 austenite Inorganic materials 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims 4
- 238000003723 Smelting Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 description 14
- 239000011651 chromium Substances 0.000 description 13
- 238000010791 quenching Methods 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 240000008042 Zea mays Species 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000007571 dilatometry Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- 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
-
- 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
- C21D2211/002—Bainite
-
- 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
- C21D2211/008—Martensite
Definitions
- the present invention relates to weldable structural steel parts and their method of manufacture.
- the structural steels must have a certain level of mechanical characteristics to be adapted to the use that one wishes to make, and they must in particular have a high hardness.
- steels are used that can be quenched, that is to say for which one can obtain a martensitic or bainitic structure when cooled sufficiently quickly and efficiently.
- a bainitic critical velocity is thus defined, beyond which a bainitic, martensitic or martensite-bainitic structure is obtained, as a function of the cooling rate reached.
- the quenchability of these steels depends on their content of quenching elements. In general, the more these elements are present in large quantities, the lower the bainitic critical speed is low.
- the welding zone also known as the Zone Affectée Thermiquement or ZAT
- ZAT Zone Affectée Thermiquement
- micro-alloyed boron grades were then developed, taking advantage of the fact that, in particular, the quenching efficiency of this element decreases when the austenitization temperature increases.
- the ZAT is less soaking than it would be in a grade of the same quenchability without boron, and it can thus reduce hardenability and hardness of this ZAT.
- the object of the present invention is to overcome this drawback by proposing a structural steel having improved quenchability without reducing its weldability.
- the chemical composition of the steel of the piece according to the invention also satisfies the relationship: 1 , 1 % mn + 0 , 7 % Or + 0 , 6 % Cr + 1 , 5 ⁇ % MB + % W / 2 ⁇ 1 , preferably ⁇ 2
- the chemical composition of the steel of the piece according to the invention furthermore satisfies the relationship: % Cr + 3 ⁇ % MB + % W / 2 ⁇ 1 , 8 preferably ⁇ 2 , 0.
- the cooling rate may be slowed down, in particular to promote a phenomenon of self-income and the retention of 3 % to 20% residual austenite.
- the cooling rate between 500 ° C and a temperature less than or equal to 200 ° C will then be between 0.07 ° C / s and 5 ° C / s; more preferably between 0.15 ° C / s and 2.5 ° C / s.
- an income is made at a temperature below 300 ° C for a time less than 10 hours, after cooling to a temperature of less than or equal to 200 ° C.
- the process according to the invention does not comprise any income after the cooling of the part to a temperature of less than or equal to 200 ° C.
- the part subjected to the process according to the invention is a sheet of thickness between 3 and 150 mm.
- the third subject of the invention is a process for manufacturing a weldable steel sheet according to the invention, whose thickness is between 3 mm and 150 mm, and which is characterized in that a quenching of said sheet, the cooling rate V R at the core of the sheet between 800 ° C and 500 ° C, expressed in ° C / hour, and the composition of the steel being such that: 1 , 1 % mn + 0 , 7 % Or + 0 , 6 % Cr + 1 , 5 ⁇ % MB + % W / 2 + log V R ⁇ 5 , 5 , and preferably ⁇ 6, log being the logarithmic decimal.
- the present invention is based on the new finding that the addition of silicon in the contents indicated above makes it possible to increase the quenching effect of boron by 30 to 50%. This synergy intervenes without increase the amount of boron added, while the silicon does not have a significant soaking effect in the absence of boron.
- the improvement of the quenchability makes it possible to cool the pieces more slowly, while guaranteeing an essentially bainitic, martensitic or martensite-bainitic structure.
- This slower cooling combined with a sufficient content of carburigenic elements then allows the precipitation of fine carbides of chromium, molybdenum and / or tungsten by a so-called self-tempering phenomenon.
- This phenomenon of self-income is, moreover, greatly favored by the slowing down of the cooling rate below 500 ° C.
- this slowdown also favors the retention of austenite, preferably in a proportion of between 3% and 20%.
- the manufacturing process is thus simplified while improving the mechanical characteristics of the steel, which no longer undergoes significant softening due to high temperature tempering, as is customary. However, it remains possible to make such an income at the usual temperatures, that is to say less than or equal to Ac 1 .
- a steel according to the invention is produced, it is cast in the form of a half product which is then shaped by hot plastic deformation, for example by rolling or forging.
- the part thus obtained is then austenitized by heating at a temperature above Ac 3 but below 1000 ° C., and preferably below 950 ° C., and then cooled to room temperature so that, at the heart of the piece, the cooling rate between 800 ° C and 500 ° C is greater than the bainitic critical speed.
- the austenitization temperature is limited to 1000 ° C., since beyond this, the quenching effect of the boron becomes too weak.
- the part is then optionally subjected to a conventional feed at a temperature of less than or equal to Ac 1 , but it is preferred to limit the temperature to 300 ° C., or even to eliminate this step. Indeed, the absence of income can be, possibly, compensated by a phenomenon of self-income. This is particularly favored by allowing a cooling rate at low temperature (ie below 500 ° C approximately) preferably between 0.07 ° C / s and 5 ° C / s; more preferably between 0.15 ° C / s and 2.5 ° C / s.
- a piece is thus obtained, and in particular a weldable sheet made of steel having a bainitic, martensitic or martensitic-bainitic core structure, comprising from 3 to 20% of residual austenite.
- the presence of residual austenite is of particular interest with regard to the behavior of steel during welding. Indeed, in order to limit the risk of welding cracking, and in addition to the abovementioned reduction in the hardenability of the ZAT, the presence of residual austenite in the base metal, in the vicinity of the ZAT, makes it possible to fix a part of dissolved hydrogen, possibly introduced by the welding operation, hydrogen which, if it were not so fixed, would increase the risk of cracking.
- ingotins have been manufactured with steels 1 and 2 in accordance with the invention, and with steels A and B according to the prior art, the compositions of which are, in thousandths of a% by weight, and the exception of iron: VS Yes B mn Or Cr MB W V Nb Ti al NOT 1 415 870 2 1150 510 1110 450 - - - - 55 6 AT 420 315 3 1150 520 1130 460 - - - - 52 5 2 450 830 3 715 1410 1450 410 230 65 38 32 25 6 B 460 280 3 720 1430 1470 425 240 63 42 31 27 6
- V1 From this velocity V1 are deduced the maximum sheet thicknesses that can be obtained while maintaining a substantially martensitic core structure and also comprising at least 3% residual austenite. These thicknesses were determined in the case of quenching in air (A), oil (H) and water (E).
- ingot V1 (° C / h) Thickness max. (Mm) C eq (%) AT H E L1 8,800 7 60 100 0.95 THE 15,000 4 40 75 0.91 L2 5000 13 80 120 1.07 LB 8200 8 55 85 1.09
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 Articles (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Separation Of Gases By Adsorption (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200330932T SI1563109T1 (sl) | 2002-11-19 | 2003-11-13 | Kos konstrukcijskega jekla, ki se da variti, in postopek za izdelavo |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0214423 | 2002-11-19 | ||
FR0214423A FR2847274B1 (fr) | 2002-11-19 | 2002-11-19 | Piece d'acier de construction soudable et procede de fabrication |
PCT/FR2003/003360 WO2004048630A1 (fr) | 2002-11-19 | 2003-11-13 | Piece d'acier de construction soudable et procede de fabrication |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1563109A1 EP1563109A1 (fr) | 2005-08-17 |
EP1563109B1 true EP1563109B1 (fr) | 2007-08-01 |
Family
ID=32187694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03789464A Expired - Lifetime EP1563109B1 (fr) | 2002-11-19 | 2003-11-13 | Piece d'acier de construction soudable et procede de fabrication |
Country Status (22)
Country | Link |
---|---|
US (2) | US11060171B2 (sl) |
EP (1) | EP1563109B1 (sl) |
JP (1) | JP4535878B2 (sl) |
KR (1) | KR101010595B1 (sl) |
CN (1) | CN100352966C (sl) |
AR (1) | AR042070A1 (sl) |
AT (1) | ATE368755T1 (sl) |
AU (1) | AU2003294048B2 (sl) |
BR (1) | BR0315695B1 (sl) |
CA (1) | CA2506352C (sl) |
DE (1) | DE60315339T2 (sl) |
DK (1) | DK1563109T3 (sl) |
ES (1) | ES2293075T3 (sl) |
FR (1) | FR2847274B1 (sl) |
PE (1) | PE20040488A1 (sl) |
PL (1) | PL209396B1 (sl) |
PT (1) | PT1563109E (sl) |
RU (1) | RU2336363C2 (sl) |
SI (1) | SI1563109T1 (sl) |
UA (1) | UA81929C2 (sl) |
WO (1) | WO2004048630A1 (sl) |
ZA (1) | ZA200503962B (sl) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100412220C (zh) * | 2006-04-03 | 2008-08-20 | 宜昌黑旋风锯业有限责任公司 | 一种金刚石锯片基体钢 |
KR101067896B1 (ko) * | 2007-12-06 | 2011-09-27 | 주식회사 포스코 | 강도 및 연성이 우수한 고탄소 강판 및 그 제조 방법 |
RU2458177C1 (ru) * | 2010-12-03 | 2012-08-10 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Прокат полосовой из борсодержащей марганцовистой стали |
RU2445396C1 (ru) * | 2011-04-18 | 2012-03-20 | Юлия Алексеевна Щепочкина | Конструкционная сталь |
CL2012002218A1 (es) * | 2012-08-09 | 2013-07-26 | Compañia Electro Metalurgica S A | Metodo de produccion de acero fundido de alta resistencia al desgaste con microestructura mayoritariamente bainitica y balance adecuado de tenacicdad y dureza para aplicaciones mineras tales como molienda y chancado; y acero con dichas caracteristicas. |
CN104213048A (zh) * | 2014-08-05 | 2014-12-17 | 安徽荣达阀门有限公司 | 一种水压阀用合金钢材料及其制备方法 |
CN104630650A (zh) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | 一种耐低温高强度弹簧钢及其制备方法 |
KR101642421B1 (ko) | 2015-03-06 | 2016-08-11 | 국민대학교산학협력단 | 구조용강 조성물 |
JP2018538440A (ja) | 2015-11-16 | 2018-12-27 | ベントラー スティール / チューブ ゲーエムベーハー | 高エネルギー吸収能力を備えた合金鋼及び鋼管製品 |
DE102016203969A1 (de) * | 2016-03-10 | 2017-09-14 | Thyssenkrupp Ag | Verfahren zur Wärmebehandlung eines Flachproduktes aus Stahl, wärmebehandeltes Flachprodukt aus Stahl sowie seine Verwendung |
FR3103498B1 (fr) * | 2019-11-22 | 2021-12-10 | Electricite De France | Pièce massive métallique et son procédé de fabrication |
KR20220000131A (ko) * | 2020-06-25 | 2022-01-03 | 국방과학연구소 | 고인성 고경도강 합금 및 그 제조방법 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4171233A (en) * | 1978-05-22 | 1979-10-16 | Bethlehem Steel Corporation | Lens quality of die steel |
JPH0236648B2 (ja) * | 1983-06-23 | 1990-08-20 | Nisshin Steel Co Ltd | Kokyodokoenseikonoseiho |
US4673433A (en) * | 1986-05-28 | 1987-06-16 | Uddeholm Tooling Aktiebolag | Low-alloy steel material, die blocks and other heavy forgings made thereof and a method to manufacture the material |
JPH05320749A (ja) * | 1992-05-20 | 1993-12-03 | Nisshin Steel Co Ltd | 超高強度鋼の製造方法 |
JPH06299242A (ja) * | 1993-04-09 | 1994-10-25 | Kawatetsu Techno Wire Kk | 遅れ破壊特性及び機械的性質の優れたpc鋼材の製造方法 |
GB2297094B (en) * | 1995-01-20 | 1998-09-23 | British Steel Plc | Improvements in and relating to Carbide-Free Bainitic Steels |
FR2729974B1 (fr) * | 1995-01-31 | 1997-02-28 | Creusot Loire | Acier a haute ductilite, procede de fabrication et utilisation |
FR2748036B1 (fr) * | 1996-04-29 | 1998-05-22 | Creusot Loire | Acier faiblement allie pour la fabrication de moules pour matieres plastiques |
BE1011149A3 (fr) * | 1997-05-12 | 1999-05-04 | Cockerill Rech & Dev | Acier ductile a haute limite elastique et procede de fabrication de cet acier. |
TW567233B (en) * | 2001-03-05 | 2003-12-21 | Kiyohito Ishida | Free-cutting tool steel |
FR2847270B1 (fr) * | 2002-11-19 | 2004-12-24 | Usinor | Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue |
FR2960883B1 (fr) * | 2010-06-04 | 2012-07-13 | Vallourec Mannesmann Oil & Gas | Acier faiblement allie a limite d'elasticite elevee et haute resistance a la fissuration sous contrainte par les sulfures |
-
2002
- 2002-11-19 FR FR0214423A patent/FR2847274B1/fr not_active Expired - Lifetime
-
2003
- 2003-11-13 RU RU2005119210/02A patent/RU2336363C2/ru active
- 2003-11-13 DE DE60315339T patent/DE60315339T2/de not_active Expired - Lifetime
- 2003-11-13 JP JP2004554596A patent/JP4535878B2/ja not_active Expired - Lifetime
- 2003-11-13 DK DK03789464T patent/DK1563109T3/da active
- 2003-11-13 AT AT03789464T patent/ATE368755T1/de active
- 2003-11-13 PL PL375545A patent/PL209396B1/pl unknown
- 2003-11-13 UA UAA200505977A patent/UA81929C2/uk unknown
- 2003-11-13 BR BRPI0315695-8B1A patent/BR0315695B1/pt active IP Right Grant
- 2003-11-13 PT PT03789464T patent/PT1563109E/pt unknown
- 2003-11-13 WO PCT/FR2003/003360 patent/WO2004048630A1/fr active IP Right Grant
- 2003-11-13 CA CA2506352A patent/CA2506352C/fr not_active Expired - Lifetime
- 2003-11-13 KR KR1020057009075A patent/KR101010595B1/ko active IP Right Grant
- 2003-11-13 AU AU2003294048A patent/AU2003294048B2/en not_active Expired
- 2003-11-13 EP EP03789464A patent/EP1563109B1/fr not_active Expired - Lifetime
- 2003-11-13 CN CNB2003801036405A patent/CN100352966C/zh not_active Expired - Lifetime
- 2003-11-13 US US10/535,174 patent/US11060171B2/en active Active
- 2003-11-13 ES ES03789464T patent/ES2293075T3/es not_active Expired - Lifetime
- 2003-11-13 SI SI200330932T patent/SI1563109T1/sl unknown
- 2003-11-18 PE PE2003001171A patent/PE20040488A1/es not_active Application Discontinuation
- 2003-11-18 AR ARP030104256A patent/AR042070A1/es not_active Application Discontinuation
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2005
- 2005-05-17 ZA ZA200503962A patent/ZA200503962B/en unknown
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2020
- 2020-07-08 US US16/923,163 patent/US11279994B2/en not_active Expired - Lifetime
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