FERRITIC STAINLESS STEEL WITH IMPROVED HIGH TEMPERATURE CREEP RESISTANCE AND MANUFACTURING METHOD THEREFOR

A ferritic stainless steel with improved high temperature creep resistance is disclosed. The disclosed ferritic stainless steel comprises by weight %: 0.005 to 0.03% of C; 0.005 to 0.03% of N; 0.05 to 0.9% of Si; 0.05 to 0.9% of Mn; 14.0 to 19.0% of Cr; 0.1 to 0.6% of Ti; 0.1 to 0.6% of Nb; 0.1 to 0...

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Bibliographische Detailangaben
Hauptverfasser: KIM, Hoi Hun, RYU, Han Jin, JUNG, Il Chan
Format: Patent
Sprache:eng ; fre ; kor
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Zusammenfassung:A ferritic stainless steel with improved high temperature creep resistance is disclosed. The disclosed ferritic stainless steel comprises by weight %: 0.005 to 0.03% of C; 0.005 to 0.03% of N; 0.05 to 0.9% of Si; 0.05 to 0.9% of Mn; 14.0 to 19.0% of Cr; 0.1 to 0.6% of Ti; 0.1 to 0.6% of Nb; 0.1 to 0.6% of Cu; 0.01 to 0.04% of P; 0.01% or less (excluding 0) of S; and a balance of Fe and inevitable impurities, and is characterized by satisfying formulas (1) and (2) as follows: Equation (1): 0.5 ≤ Nb/Cu ≤ 3, and Equation (2): 20 ≤ [2Nb+Ti]/[C+N], where Nb, Cu, Ti, C, and N represent the content of each element (% by weight). La présente invention concerne un acier inoxydable ferritique présentant une résistance au fluage à haute température améliorée. L'acier inoxydable ferritique selon l'invention comprend en % en poids : de 0,005 à 0,03 % de C ; de 0,005 à 0,03 % de N ; de 0,05 à 0,9 % de Si ; de 0,05 à 0,9 % de Mn ; de 14,0 à 19,0 % de Cr ; de 0,1 à 0,6 % de Ti ; de 0,1 à 0,6 % de Nb ; de 0,1 à 0,6 % de Cu ; de 0,01 à 0,04 % de P ; 0,01 % ou moins (sauf 0) de S ; et un reste de Fe et d'impuretés inévitables, et est caractérisé en ce qu'il satisfait les formules (1) et (2) comme suit : équation (1) : 0,5 ≤ Nb/Cu ≤ 3, et équation (2) : 20 ≤ [2Nb+Ti]/[C+N], où Nb, Cu, Ti, C et N représentent la teneur de chaque élément (% en poids). 고온 내크립 특성이 향상된 페라이트계 스테인리스강이 개시된다. 개시된 페라이트계 스테인리스강 중량%로, 중량%로, C: 0.005 내지 0.03%, N: 0.005 내지 0.03%, Si: 0.05 내지 0.9%, Mn: 0.05 내지 0.9%, Cr: 14.0 내지 19.0%, Ti: 0.1 내지 0.6%, Nb: 0.1 내지 0.6%, Cu: 0.1 내지 0.6%, P: 0.01 내지 0.04%, S: 0.01% 이하(0은 제외)를 포함하고, 나머지는 Fe 및 불가피한 불순물을 포함하고, 하기 식(1), 식(2)를 만족하는 것을 특징으로 한다. 식(1): 0.5≤ Nb/Cu ≤3 식(2): 20≤ [2Nb+Ti]/[C+N] 여기서, Nb, Cu, Ti, C, N 는 각 원소의 함량(중량%)을 의미한다.