| 摘要 |
PROBLEM TO BE SOLVED: To provide a slab for steel sheet in which press cracking caused by large-sized inclusions is hard to occur, to provide a method for producing the same, a steel sheet, and a method for producing the same. SOLUTION: The composition of inclusions in a continuously cast slab is controlled to the following, and then rolling is performed at a draft of≥150: 80≤Ti oxide(%)+REM oxide(%)+Al<SB>2</SB>O<SB>3</SB>(%); CaO(%)≤5; 10≤Ti oxide(%); 15≤Al<SB>2</SB>O<SB>3</SB>(%)≤70; and 5≤REM oxide(%)≤0.31×Al<SB>2</SB>O<SB>3</SB>(%)+15. By this method, the steel sheet in which press cracking caused by large-sized nonmetallic inclusions upon press working is hard to occur can be obtained. COPYRIGHT: (C)2007,JPO&INPIT
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