发明名称 |
VACUUM CASTING METHOD OF MOLTEN STEEL BY BOTTOM POURING |
摘要 |
PURPOSE:To obtain a clean steel having satisfactory surface quality by pouring a molten steel from the bottom into a casting mold in a vacuum atmosphere and continuing degassing with steam droplets in an intermediate vessel during the entire period thereof. CONSTITUTION:A molten steel is poured into an intermediate vessel 2 in the upper part of a pouring pipe 3 and the pouring flow thereof forms steam droplets as the inside of the vessel 2 is communicated with a vacuum suction pipe 7 so that the hydrogen value conforming to the degree of vacuum and the temp. of the molten steel is obtd. with the highest degassing efficiency. The inside of a casting mold 4 is also communicated with the same vacuum suction pipe 7 and therefore the molten steel subjected to the degassing with steam droplets is cast by bottom pouring in an oxidation-free state into the mold 4 maintained in vacuum. The degassing with steam droplets of the molten steel is made possible over the entire period of casting in the above-mentioned way. The molten steel level in the mold 4 right after the leakage when the casting is completed is maintained equal to the molten steel level in the pipe 3 even during the charging without fluctuation and the casting defect occurring in such fluctuation is obviated.
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申请公布号 |
JPS59232663(A) |
申请公布日期 |
1984.12.27 |
申请号 |
JP19830107845 |
申请日期 |
1983.06.17 |
申请人 |
KAWASAKI SEITETSU KK |
发明人 |
KATOU TOSHIO;NANBA AKIHIKO;MINO HIROYUKI;OOMORI TAKASHI;KOJIMA SHINJI;HIRATA KENJI |
分类号 |
B22D7/00;B22D23/00;(IPC1-7):B22D23/00 |
主分类号 |
B22D7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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