저사이클 피로 특성이 우수한 Fe-Mn-Si계 합금 주조재

• Main Authors: OHSAWA YOSHIAKI, TAKAMORI SUSUMU, UMEMURA KENJI, OTSUKA HIROAKI, SAKURAYA KAZUYUKI, SAKAI HIROMI, KUSHIBE ATSUMICHI, SAWAGUCHI TAKAHIRO, INOUE YASUHIKO, CHIBA YUYA
• Format: Patent
• Language: Korean
• Published: 10.12.2019
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

본 발명은 구조용 건축재 등으로서 유용한 저사이클 피로 특성이 우수한 새로운 Fe-Mn-Si계 합금 주조재를 제공한다. 본 발명의 일시시형태에 따른 Fe-Mn-Si계 합금 주조재는 Mn 및 Si를 필수 성분 원소로서 함유하고, 또한, Cr, Ni, Al, C 중 1종 이상을 임의 성분 원소로서 함유하고, 성분 조성이, 5질량%≤Mn≤35질량%, 1.5질량%≤Si≤6.5질량%, 0질량%≤Cr≤15질량%, 0질량%≤Ni≤15질량%, 0질량%≤Al≤3질량%, 0질량%≤C≤0.4질량%, 잔부 Fe 및 불가피 불순물인 Fe-Mn-Si계 합금 주조재로서, 식(a): 37＜[%Mn]+0.3[%Si]+0.7[%Cr]+2.4[%Ni]+5.2[%Al]+28[%C]＜45, 또한, 식(b): [%Ni]+30[%C]+0.5[%Mn]＞0.75[%Cr]+1.125[%Si]+2[%Al]의 조건을 만족하는 것을 특징으로 한다. The present invention provides a new Fe-Mn-Si-based cast alloy having excellent low-cycle fatigue properties that is useful as a structural building material or the like. An Fe-Mn-Si-based cast alloy according to one embodiment of the present invention contains Mn and Si as an essential component element, and one or more of Cr, Ni, Al, and C as an optional component element. The Fe-Mn-Si-based cast alloy has a component composition being 5 mass% ≤ Mn ≤ 35 mass%, 1.5 mass% ≤ Si ≤ 6.5 mass%, 0 mass% ≤ Cr ≤ 15 mass%, 0 mass% ≤ Ni ≤ 15 mass%, 0 mass% ≤ Al ≤ 3 mass%, and 0 mass% ≤ C ≤ 0.4 mass%, with the balance being Fe and inevitable impurities, and the component composition satisfies conditions of Formula (a): 37 < [%Mn] + 0.3[%Si] + 0.7[%Cr] + 2.4[%Ni] + 5.2[%A] + 28[%C] < 45, and Formula (b): [%Ni] + 30[%C] + 0.5[%Mn] > 0.75[%Cr] + 1.125[%Si] + 2[%Al].