Graphite steel wire rod and graphite steel for tv pem nut parts, methods for manufacturing and cutting therefor
AssigneePosco
InventorsSangwoo CHOI, Namsuk LIM, Sewon PARK
Life of this patent
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Abstract
The present disclosure relates to a graphite steel wire rod for TV PEM nut parts, a graphite steel, and a manufacturing and cutting method therefor, and more particularly, to a cutting method for manufacturing industrial parts, a graphite steel wire rod, a graphite steel wire rod, a graphite steel, and a manufacturing method therefor.
Claims14
A graphite steel wire rod for TV PEM nut parts comprising, in percent by weight (wt %), 0.60 to 0.79% of carbon (C), 2.0 to 2.5% of silicon (Si), 0.7 to 1.3% of manganese (Mn), 0.2 to 0.5% of sulfur (S), 0.01 to 0.05% of aluminum (Al), 0.005 to 0.020% of titanium (Ti), 0.003 to 0.015% of nitrogen (N), 0.0001 to 0.015% of phosphorus (P), and the balance of iron (Fe) and inevitable impurities.
A method for manufacturing a graphite steel wire rod for TV PEM nut parts, the method comprising:
- preparing a billet including, in percent by weight (wt %), 0.60 to 0.79% of carbon (C), 2.0 to 2.5% of silicon (Si), 0.7 to 1.3% of manganese (Mn), 0.2 to 0.5% of sulfur (S), 0.01 to 0.05% of aluminum (Al), 0.005 to 0.020% of titanium (Ti), 0.003 to 0.015% of nitrogen (N), 0.0001 to 0.015% of phosphorus (P), and the balance of iron (Fe) and inevitable impurities;
- heating the billet;
- hot rolling the heated billet into a wire rod;
- and
- cooling the wire rod.
A graphite steel for TV PEM nut parts comprising, in percent by weight (wt %), 0.60 to 0.79% of carbon (C), 2.0 to 2.5% of silicon (Si), 0.7 to 1.3% of manganese (Mn), 0.2 to 0.5% of sulfur (S), 0.01 to 0.05% of aluminum (Al), 0.005 to 0.02% of titanium (Ti), 0.003 to 0.015% of nitrogen (N), 0.0001 to 0.015% of phosphorus (P), and the balance of iron (Fe) and inevitable impurities,
- wherein in a microstructure, graphite grains are distributed in a ferrite matrix, a graphitization rate is 90% or more, and a pearlite fraction is less than 10%.
A method for manufacturing a graphite steel for TV PEM nut parts, the method comprising:
- manufacturing a wire rod including, in percent by weight (wt %), 0.60 to 0.79% of carbon (C), 2.0 to 2.5% of silicon (Si), 0.7 to 1.3% of manganese (Mn), 0.2 to 0.5% of sulfur (S), 0.01 to 0.05% of aluminum (Al), 0.005 to 0.020% of titanium (Ti), 0.003 to 0.015% of nitrogen (N), 0.0001 to 0.015% of phosphorus (P), and the balance of iron (Fe) and inevitable impurities;
- and
- performing graphitization heat treatment on the manufactured wire rod.
Dependencies are inferred from the claim text.