HIGH HARDNESS MARTENSITIC STAINLESS STEEL WITH IMPROVED IN CORROSION RESISTANCE AND HARDENABILITY AND METHOD FOR MANUFACTURING THE SAME

Disclosed is a high hardness martensitic stainless steel with improved corrosion resistance and hardenability and a method for manufacturing the same. The martensitic stainless steel comprises: 0.3-0.6 wt% of C; 0.15-0.3 wt% of N; 0.1-0.5 wt% of Si; 0.1-0.5 wt% of Mn; 14.5-17 wt% of Cr; 0.1-0.5 wt%...

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Bibliographische Detailangaben
Hauptverfasser:	KIM BONG WN, LEE JAE HWA, JO GYU JIN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	Disclosed is a high hardness martensitic stainless steel with improved corrosion resistance and hardenability and a method for manufacturing the same. The martensitic stainless steel comprises: 0.3-0.6 wt% of C; 0.15-0.3 wt% of N; 0.1-0.5 wt% of Si; 0.1-0.5 wt% of Mn; 14.5-17 wt% of Cr; 0.1-0.5 wt% of Ni; 0.5-0.8 wt% of C + N; and the remainder consisting of Fe and unavoidable impurities. Moreover, more than 80 pieces / 100 μm^2 of chromium carbide and chromium nitride are distributed in a refined structure of a cold rolled annealing material. 내식성 및 경화능이 향상된 고경도 마르텐사이트계 스테인리스강 및 이의 제조 방법이 개시된다. 개시된 마르텐사이트계 스테인리스강은 중량 %로, C: 0.3 내지 0.6%, N: 0.15 내지 0.3%, Si: 0.1 내지 0.5%, Mn: 0.1 내지 0.5, Cr: 14.5 내지 17%, Ni: 0.1 내지 0.5%, C+N: 0.5 내지 0.8% 이하를 포함하고, 나머지는 Fe 및 불가피한 불순물을 포함하고, 냉연 소둔재의 미세조직 내에 80개/100㎛이상의 크롬탄화물 및 크롬질화물이 분포하는 것을 특징으로 한다.