저탄소강의 열간 연성 거동에 미치는 Cu의 영향

• Published in: 대한금속·재료학회지, 47(4) pp. 217 - 222
• Main Authors: 손광석, 박태은, 박병호, 김동규
• Format: Journal Article
• Language: Korean
• Published: 대한금속·재료학회 01.05.2009
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241

Cu as a tramp element has been reported to encourage transverse cracking upon straightening operation during continuous casting or mini-mill processing. Therefore, the hot workability of steels containing Cu should be investigated. The purpose of the present study was to examine the effect of Cu contents on the hot ductility of low carbon steels by using hot compression test. Hot compression test was carried out using a Gleeble. The specimens were heated to 1300˚C for solution treatment and then held for 300s before cooling at a rate of 1˚C/s to test temperatures in the range of 650~1150˚C (50˚C intervals) with strain rate of 5×10−3/s. In Cu containing steels, the hot ductility was decreased with increasing Cu content at high temperature region which is to be attributed to copper enriched phase formed at scale/steel interface, and low hot ductility with increasing Cu content at low temperature region is attributable to the strengthening of matrix by the formation of ε-Cu. The width of ductility trough region was decreased with increasing Cu content. KCI Citation Count: 12