Steel sheet having different strength along the width direction and manufacturing method for the same

• Main Authors: KOH SEONG UNG, SONG WOO HYUN
• Format: Patent
• Language: English; Korean
• Published: 03.07.2019
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

본 발명의 일 실시예에 따른 폭방향을 따라 강도가 차등화된 강판은, 길이방향을 따라 연장되는 경계부를 기준으로 서로 다른 강도를 가지는 제1 영역 및 제2 영역으로 구분되며, 상기 경계부의 폭방향 강도구배는 상기 제1 영역의 평균강도 및 상기 제2 영역의 평균강도에 의존할 수 있다. A steel plate having a different strength along a widthwise direction according to one aspect of the present invention comprises a first region and a second region which are divided by a boundary part extending along a longitudinal direction and have different strengths, wherein a widthwise strength gradient of the boundary part may be dependent on an average strength of the first region and an average strength of the second region.