핫 스탬프 성형체

• Main Authors: FUJINAKA SHINGO, TODA YURI, MURASAWA KODAI
• Format: Patent
• Language: Korean
• Published: 01.09.2023
• 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

이 핫 스탬프 성형체는, 화학 조성이, 질량%로, C: 0.15% 이상, 0.50% 이하, Si: 0.10% 이상, 3.00% 이하, Mn: 0.10% 이상, 3.00% 이하, P: 0.10% 미만, S: 0.10% 미만, N: 0.10% 미만, Ti: 0.020% 이상, 0.150% 이하, B: 0.002% 이상, 0.010% 이하를 포함하고, 임의로, Al, Cr, Mo, Co, Ni, Cu, V, W, Ca, Mg 및 REM을 포함하고, 잔부가 Fe 및 불순물로 이루어지고, 마이크로 조직이, 체적 분율로, 85% 이상의 마르텐사이트와, 15% 미만의 잔류 오스테나이트를 갖고, 상기 마이크로 조직에 있어서, 나노 경도의 도수 분포의 표준 편차가 0.70GPa 이하이며, 또한 평균 결정 입경이 4.0μm 이하이다. This hot-stamping formed body includes, as a chemical composition, by mass%: C: 0.15% or more and 0.50% or less; Si: 0.10% or more and 3.00% or less; Mn: 0.10% or more and 3.00% or less; P: less than 0.10%; S: less than 0.10%; N: less than 0.10%; Ti: 0.020% or more and 0.150% or less; B: 0.002% or more and 0.010% or less; optionally Al, Cr, Mo, Co, Ni, Cu, V, W, Ca, Mg, and REM; and a remainder including Fe and impurities, in which a microstructure of the hot-stamping formed body includes, by volume fraction, 85% or more of martensite and less than 15% of retained austenite, and in the microstructure, a standard deviation of a frequency distribution of nanohardnesses is 0.70 GPa or less, and an average grain size is 4.0 µm or less.