1700 ~ 2200 MARTENSITIC STEELS WITH 1700-2200 MPA TENSILE STRENGTH

• Main Authors: SONG RONGJIE, POTTORE NARAYAN S
• Format: Patent
• Language: English; Korean
• Published: 11.07.2018
• Subjects: 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

마텐자이트 강 조성물 및 그의 제조 방법. 더 구체적으로, 마텐자이트 강은 1700 ~ 2200 ㎫ 의 인장 강도를 갖는다. 더 구체적으로, 본 발명은 1700 ~ 2200 ㎫ 의 극한 인장 강도를 갖는 얇은 게이지 (두께 1 ㎜ 이하) 초고강도 강 및 그의 제조 방법에 관한 것이다. A martensitic steel alloy is provided. The martensitic steel alloy includes carbon from 0.22 to 0.36 wt. %, manganese from 0.5% to 2.0% wt. %, and chromium in an amount less than 0.10 wt. %. and a carbon equivalent Ceq of less than 0.44 in which Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15. Ceq is the carbon equivalent, C, Mn, Cr, Mo, V, Ni, and Cu are in wt. % of the elements in the alloy. The alloy has an ultimate tensile strength of at least 1700 MPa.