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专利名称：ULTRA-THICK STEEL MATERIAL HAVING EXCELLENT SURFACE PART NRL-DWT西罗马帝国
PROPERTIES AND METHOD FOR
MANUFACTURING SAME
同异发明人：Hak-Cheol LEE,Sung-Ho Jang
申请号：US16469480
青岛饭店申请日：20171220
公开号：US20200109461A1
师德师风学习笔记公开日：
20200409
专利内容由知识产权出版社提供
摘要：Disclod are a high-strength ultra-thick steel material and a method for manufacturing same. The high-strength ultra-thick steel material compris in weight % 0.04-0.1% of C, 1.2-2.0% of Mn, 0.2-0.9% of Ni, 0.005-0.04% of Nb, 0.005-0.03% of Ti and 0.1-0.4% of Cu, 100 ppm or less of P and 40 ppm or less of S with a balance of Fe, and inevitable impurities, and compris, in a subsurface area up to t/10 (t hereafter being referred to as the thickness of the steel material) , polygonal ferrite of 50 area % or greater (including 100 area %) and bainite of 50 area % or less (including 0 area %) as microstructures.
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申请人：POSCO
地址：Pohang-si, Gyeongsangbuk-do KR
国籍：KR冲绳群岛
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