基本信息:
- 专利标题： Ａｌ含有亜包晶鋼の連続鋳造用モールドパウダー及び連続鋳造方法
- 专利标题（英）：MOLD POWDER FOR CONTINUOUS CASTING OF AL-CONTAINING SUB-PERITECTIC STEEL, AND CONTINUOUS CASTING METHOD
- 申请号：PCT/JP2020/021918 申请日：2020-06-03
- 公开(公告)号：WO2020246498A1 公开(公告)日：2020-12-10
- 发明人： 鼓 健二 , 正木 秀弥
- 申请人： JFEスチール株式会社
- 申请人地址： 〒1000011 東京都千代田区内幸町二丁目2番3号 Tokyo JP
- 专利权人： JFEスチール株式会社
- 当前专利权人： ＪＦＥスチール株式会社
- 当前专利权人地址： 〒1000011 東京都千代田区内幸町二丁目２番３号 Tokyo JP
- 代理机构： 熊坂 晃
- 优先权： JP2019-104488 20190604
- 主分类号： B22D11/00
- IPC分类号： B22D11/00 ; B22D11/108 ; B22D11/16
A mold powder is provided which can prevent surface defects occurring in the surface of a slab of Al-containing sub-peritectic steel in which the Al content is 0.2-2.0 mass% and the carbon content is in the sub-peritectic region (0.08-0.17 mass%). This mold powder has CaO, SiO2, Na2O, Li2O, F (fluorine) and C (carbon) as basic components, and in the initial composition of the mold powder, "CaO content (mass%)/ SiO2 content (mass%)" is within a prescribed range with respect to Al content in molten steel, the Na2O content is less than or equal to 8 mass%, the Li2O content is 2-7 mass%, the "Li2O content (mass%)/ Na2Ο content (mass%)" is greater than or equal to 0.6, the F content is within a prescribed range with respect to the Na2O content and the Li2O content, the C content is 2-10 mass%, the viscosity at 1300°C is 0.05-0.20 Pa*s, and the crystallization temperature is 1100-1250°C.
IPC结构图谱:
| B | 作业；运输 |
| --B22 | 铸造；粉末冶金 |
| ----B22D | 金属铸造；用相同工艺或设备的其他物质的铸造 |
| ------B22D11/00 | 金属连续铸造，即长度不限的铸造 |