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1. WO2013100687 - HIGH STRENGTH AUSTENITIC STAINLESS STEEL, AND PREPARATION METHOD THEREOF

Publication Number WO/2013/100687
Publication Date 04.07.2013
International Application No. PCT/KR2012/011696
International Filing Date 28.12.2012
IPC
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
B22D 11/06 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
11Continuous casting of metals, i.e. casting in indefinite lengths
06into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
C22C 38/40 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
CPC
B22D 11/0622
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
11Continuous casting of metals, i.e. casting in indefinite lengths
06into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
0622formed by two casting wheels
C21D 2211/001
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
2211Microstructure comprising significant phases
001Austenite
C21D 2211/005
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
2211Microstructure comprising significant phases
005Ferrite
C21D 6/004
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
6Heat treatment of ferrous alloys
004containing Cr and Ni
C21D 9/02
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
02for springs
C22C 38/001
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
001containing N
Applicants
  • 주식회사 포스코 POSCO [KR]/[KR]
Inventors
  • 김광육 KIM, Kwang Yuk
  • 하만진 HA, Man Jin
  • 박미남 PARK, Mi Nam
Agents
  • 강신섭 KANG, Sin Seob
Priority Data
10-2011-014412628.12.2011KR
Publication Language Korean (ko)
Filing Language Korean (KO)
Designated States
Title
(EN) HIGH STRENGTH AUSTENITIC STAINLESS STEEL, AND PREPARATION METHOD THEREOF
(FR) ACIER INOXYDABLE AUSTÉNITIQUE À RÉSISTANCE ÉLEVÉE ET SON PROCÉDÉ DE PRÉPARATION
(KO) 고강도 오스테나이트계 스테인리스강 및 그 제조방법
Abstract
(EN) The present invention relates to control of the components of a metastable austenitic stainless steel capable of being used as a steel for a high strength spring, and a preparation method thereof. The austenitic stainless steel comprises 0.05-0.15 % of C, 0.05-0.09 % of N, 15-18 % of Cr, 6-8 % of Ni, Si in an amount exceeding 1.0 % and of no more than 1.5 %, 0.5-0.9 % of Mo, 0.4-1.2 % of Mn, 1.5 % or less of Cu, and the balance of Fe and other inevitable impurities by weight, wherein the Md30 temperature represented by the following formula (1) satisfies the temperature range of 25-30 ℃, the solid solution strengthening property of the delta ferrite phase is maximized through the production of a coil using strip casting, the tensile strength is 2200 Mpa or higher at a cold rolling reduction ratio of 80%, and the hardness exceeds 570 Hv.
(FR) La présente invention concerne la régulation des composants d'un acier inoxydable austénitique métastable pouvant être utilisé comme acier pour un ressort à résistance élevée et son procédé de préparation. L'acier inoxydable austénitique comprend 0,05-0,15 % de C, 0,05-0,09 % de N, 15-18 % de Cr, 6-8 % de Ni, Si dans une quantité supérieure à 1,0 % et non supérieure à 1,5 %, 0,5-0,9 % de Mo, 0,4-1,2 % de Mn, 1,5 % ou moins de Cu, le complément étant constitué de Fe et d'autres impuretés inévitables en poids, la température Md30 représentée par la formule suivante (1) satisfaisant la plage de températures de 25-30 °C, la propriété de renforcement de solution solide de la phase ferrite delta étant augmentée au maximum par la production d'une bobine au moyen d'une coulée en bande, la résistance à la traction étant supérieure ou égale à 2 200 Mpa à un rapport de réduction de laminage à froid de 80 %, et la dureté dépassant 570 Hv.
(KO) 본 발명은 고강도 스프링용 강재로 사용할 수 있는 준안정 오스테나이트계 스테인리스강의 성분제어 및 제조 공정에 관한 것이다. 중량%로, C : 0.05~0.15, N : 0.05~0.09%, Cr : 15~18, Ni : 6~8, Si : 1.0 초과 1.5% 까지, Mo : 0.5~0.9, Mn : 0.4~1.2, Cu : 1.5% 이하를를 포함하고 잔부는 Fe 및 기타 불가피한 불순물을 포함하되, 하기식 (1)로 이루어진 Md30 온도가 25~30℃ 범위를 만족하며, 스트립캐스팅 공법을 활용한 코일제조로 델타페라이트상의 고용강화능을 극대화하였으며 이때의 물성은 80% 냉간압하율에서 인장강도가 2200Mpa 이상이며 경도가 570Hv를 상회한다.
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