公开(公告)号：US08715429B2

公开(公告)日：2014-05-06

申请号：US13384779

申请日：2010-08-04

Applicant: You-Hwan Lee ,  Dong-Hyun Kim ,  Sang-Yoon Lee ,  Ha-Ni Kim ,  Yong-Sik Park

Inventor： You-Hwan Lee ,  Dong-Hyun Kim ,  Sang-Yoon Lee ,  Ha-Ni Kim ,  Yong-Sik Park

IPC: C22C38/02 ,  C22C38/04 ,  C21D8/06 ,  C21D7/13

CPC classification number: C22C38/02 ,  C21D8/021 ,  C21D8/0263 ,  C21D8/06 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/04

Abstract: There is provided a rolled steel with excellent toughness, a drawn wire rod prepared by drawing the rolled steel, and a method for manufacturing the same, in which even if a heating step is omitted, the toughness of the steel can be improved by securing a degenerated pearlite structure in an internal structure of the rolled steel by controlling a content of Mn among components and cooling conditions, and then preventing C diffusion. The rolled steel according to the present invention includes C: 0.15˜0.30%, Si: 0.1˜0.2%, Mn: 1.8˜3.0%, P: 0.035% or less, S: 0.040% or less, the remainder Fe, and other inevitable impurites, as a percentage of weight, in which the microstucture of the rolled steel is composed of ferrite and pearlite including cementite with 150 nm or less of thickness.

Abstract translation: 提供具有优异韧性的轧制钢，通过拉制轧制钢制备的拉丝线及其制造方法，其中即使省略加热步骤，也可以通过确保钢的韧性来提高钢的韧性 通过控制成分中的Mn含量和冷却条件，然后防止C扩散，在轧制钢的内部结构中退化珠光体组织。 根据本发明的轧制钢包括C：0.15〜0.30％，Si：0.1〜0.2％，Mn：1.8〜3.0％，P：0.035％以下，S：0.040％以下，剩余部分Fe等 不可避免的杂质占重量的百分比，其中轧制钢的组织由铁素体和珠光体组成，包括厚度在150nm以下的渗碳体。

公开(公告)号：US20120118443A1

公开(公告)日：2012-05-17

申请号：US13384779

申请日：2010-08-04

Applicant: You-Hwan Lee ,  Dong-Hyun Kim ,  Sang-Yoon Lee ,  Ha-Ni Kim ,  Yong-Sik Park

Inventor： You-Hwan Lee ,  Dong-Hyun Kim ,  Sang-Yoon Lee ,  Ha-Ni Kim ,  Yong-Sik Park

IPC: C22C38/02 ,  C21D9/46

CPC classification number: C22C38/02 ,  C21D8/021 ,  C21D8/0263 ,  C21D8/06 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/04

Abstract: There is provided a rolled steel with excellent toughness, a drawn wire rod prepared by drawing the rolled steel, and a method for manufacturing the same, in which even if a heating step is omitted, the toughness of the steel can be improved by securing a degenerated pearlite structure in an internal structure of the rolled steel by controlling a content of Mn among components and cooling conditions, and then preventing C diffusion. The rolled steel according to the present invention includes C: 0.15˜0.30%, Si: 0.1˜0.2%, Mn: 1.8˜3.0%, P: 0.035% or less, S: 0.040% or less, the remainder Fe, and other inevitable impurites, as a percentage of weight, in which the microstucture of the rolled steel is composed of ferrite and pearlite including cementite with 150 nm or less of thickness.

Abstract translation: 提供具有优异韧性的轧制钢，通过拉制轧制钢制备的拉丝线及其制造方法，其中即使省略加热步骤，也可以通过确保钢的韧性来提高钢的韧性 通过控制成分中的Mn含量和冷却条件，然后防止C扩散，在轧制钢的内部结构中退化珠光体组织。 根据本发明的轧制钢包括C：0.15〜0.30％，Si：0.1〜0.2％，Mn：1.8〜3.0％，P：0.035％以下，S：0.040％以下，剩余部分Fe等 不可避免的杂质占重量的百分比，其中轧制钢的组织由铁素体和珠光体组成，包括厚度在150nm以下的渗碳体。