Posco

Dae Hyun Song

June Soo Park

Seung Il Kim

Il Nam Yang

According to an exemplary embodiment of the present invention, a manufacturing method of a grain-oriented electrical steel sheet, includes: preparing a slab; heating the slab; forming a hot-rolled sheet by hot-rolling the slab; performing hot-rolled sheet annealing on the hot-rolled sheet; forming a cold-rolled sheet by cold-rolling the hot-rolled sheet that has been completely subjected to the hot-rolled sheet annealing; performing first recrystallization annealing on the cold-rolled sheet; and performing second recrystallization annealing on the cold-rolled sheet that has been completely subjected to the first recrystallization annealing, wherein the hot-rolled sheet undergoes a first heating step, a second heating step, and a soaking step, and a temperature rise rate tof the first heating step and a temperature rise rate tof the second heating step satisfy Formula 1.5&#xd7;&#x2003;&#x2003;[Formula 1]

Grain-oriented electrical steel sheet and manufacturing method therefor

A non-grain oriented electrical steel sheet according to an exemplary embodiment of the present invention includes Si: 1.0 to 4.0%, Mn: 0.1 to 1.0%, Al: 0.1 to 1.5%, Zn: 0.001 to 0.01% B: 0.0005 to 0.005%, and a balance including Fe and inevitable impurities.

Non-oriented electrical steel sheet and method for producing same

The present invention relates to a method of manufacturing a directional electric steel plate having excellent surface wettability and magnetic properties. More particularly, the present invention relates to a directional electric steel plate in which a surface of a steel plate consisting of Si: 2.0 to 6.5%, acid soluble Al: 0.4 to 5%, Mn: 0.20% or less (0% exclusive), N: 0.010% or less (0% exclusive), S: 0.010% or less (0% exclusive), P: 0.005 to 0.05%, C: 0.04 to 0.12% and a balance of Fe and other unavoidable impurities is hot-dip plated with aluminum or an aluminum-silicon alloy, and heat-treated, so that aluminum on the hot-dip plated layer is diffused or infiltrated into the steel plate, and a method of manufacturing the same.

Growing community of inventors

Pohang-si, South Korea

Dae Hyun Song