핫 스탬프 성형체

• Main Authors: FUJINAKA SHINGO, TODA YURI, MAEDA DAISUKE
• Format: Patent
• Language: Korean
• Published: 20.07.2022
• 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

화학 조성이, 질량%로, C：0.06% 이상, 0.20% 미만, Si：0.010~1.00%, Mn：1.20~3.00%, P：0.100% 이하, S：0.010% 이하, sol.Al：0.01~0.500%, N：0.010% 이하, Nb：0.0010~0.020%이며, 마이크로 조직이, 면적률로 마르텐사이트：85% 이상이고, 상기 마르텐사이트 중의 GAIQ값이 35000 이상 45000 미만인 영역의 비율이, 30면적% 이상이며, 인장 강도 TS(MPa)와 독일 자동차 공업회 규격 VDA238-100에 의한 최대 굽힘 각도 α(deg)의 곱 TS×α가 105000 이상이며, 또한 상기 α가 75 이상인, 핫 스탬프 성형체. 이 핫 스탬프 성형체는, 고강도와 우수한 굽힘성을 구비한다. A hot stamped body with high strength and good bendability, comprising a chemical composition consisting of: in mass%, C: 0.06% or more to less than 0.20%, Si: 0.010 to 1.00%, Mn: 1.20 to 3.00%, P: 0.100% or less, S: 0.010% or less, Al: 0.010 to 0.500%, N: 0.010% or less, Nb: 0.0010 to 0.020%, Ti: 0 to 0.10%, V: 0 to 0.10%, Cr: 0 to 0.50%, Mo: 0 to 1.00%, B: 0 to 0.0100%, Ni: 0 to 0.50%, REM: 0 to 0.0100%, Mg: 0 to 0.010%, Ca: 0 to 0.0100%, and Co: 0 to 2.0%, with the balance: Fe and impurities, wherein a microstructure includes martensite: 85% or more, a proportion of regions in the martensite where GAIQ values are 35000 or more to less than 45000 is 30 area% or more, and TS × α, is 105000 or more, and α is 75 or more.