High-carbon steel sheet and method for producing same
2014
A high-carbon steel sheet has a chemical composition comprising, in % by mass, 0.60% to 0.90% of C, 0.30% to 1.50% of Mn, 0.20% to 1.00% of Cr and others, and has such a structure that the concentration of Mn contained in cementite is 2 to 8% inclusive, the concentration of Cr contained in the cementite is 2 to 8% inclusive, the average particle diameter of ferrite is 10 to 50 Mum inclusive, the average particle diameter of the cementite is 0.3 to 1.5 Mum inclusive and the spheroidization ratio of the cementite is 85% or more.
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