Ultrahigh Carbon (UHC)超塑性鋼ラミネート板の衝撃特性

概要

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In order to determine the feasibility of producing thick sections of fine-grained ultrahigh carbon (UHC) steel by roll bonding below the A1 temperature, and to examine the impact characteristics of thick UHC steel, thirteen-layered 52150 (1.5%C+1.5%Cr) laminate material has been prepared. In addition, thirteen-layered composite having alternate layers of UHC steel and 1020 steel have been prepared for Charpy V-notch toughness determination.It is demonstrated that the 52150 laminate, tested in both the crack-divider and crack-arrester orientations, shows a low shelf energy. Also, the 52150/1020 composite in the crack-divider orientation shows little improvement when compared with the 52150 laminate. However, the 52150/1020 composite in the crack-arrester orientation shows a remarkable improvement in impact strength. This is due to the laminate geometry.
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