Wire Rod For Graphitization Heat Treatment, And Graphite Steel

Abstract: The present specification discloses a wire rod for graphitization heat treatment, and graphite steel, whereby graphitization heat treatment time is drastically reduced, and fine-grain graphite is uniformly distributed in a matrix during graphitization heat treatment. The disclosed wire rod for graphitization heat treatment, according to one embodiment, comprises, in weight percent,: 0.65 to 0.85% of C; 2.00 to 3.00% of Si; 0.15 to 0.35% of Mn; 0.005 to 0.1% of Ti; 0.01% or less of N; 0.0005% or less of B; 0.05% or less of P; 0.05% or less of S; and a balance of Fe and inevitable impurities, wherein the value of formula (1) below satisfies -1 to 1 inclusive, and a microstructure may comprise, by area fraction, 40% or less of ferrite, 5% or less of the sum of bainite and martensite, and a balance of pearlite. Formula (1): 100*([Mn]-0.25)2 - (100*[N])2 In formula (1), [Mn] and [N] represent the respective weight percents of the alloying elements.

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