ULTRAFINE-GRAINED WIRE ROD HAVING HIGH STRENGTH AND METHOD FOR MANUFACTURING THE SAME
摘要
PURPOSE: An ultrafine-grained high-strength wire rod and a manufacturing method thereof are provided to obtain a wire rod with enhanced strength and prevent the reduction elongation ratio by employing severe plastic deformation using groove rolling in a warm region. CONSTITUTION: An ultrafine-grained high-strength wire rod has the same composition as SCM435 steel. The wire rod includes a pro-eutectoid ferrite structure having an average size of 1 micron meter or less and carbide having an average size of 200nm or less. A manufacturing method of the ultrafine-grained high-strength comprises a step of groove-rolling SCM435 steel at an area reduction ratio of 80% or more in a warm region and a step of air-cooling the SCM435 steel to the room temperature.
申请公布号
KR20120061628(A)
申请公布日期
2012.06.13
申请号
KR20100123000
申请日期
2010.12.03
申请人
POSCO;POSTECH ACADEMY-INDUSTRY FOUNDATION
发明人
LEE, CHONG SOO;LEE, TAE KYUNG;LEE, SANG YOON;SON, IL HEON