发明名称 |
DEVICE FOR EVALUATING CLEANLINESS OF METAL AND METHOD THEREFOR |
摘要 |
In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and analyzing by chemical or physical measurements, to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions. <IMAGE> |
申请公布号 |
EP0760480(B1) |
申请公布日期 |
2004.06.02 |
申请号 |
EP19960906022 |
申请日期 |
1996.03.14 |
申请人 |
NIPPON STEEL CORPORATION |
发明人 |
UMEZAWA, KAZUSHIGE;SUZUKI, TOKIO;CHIBA, KOICHI;UEMORI, RYUJI;TOH, TAKEHIKO;KONDO, HIROYUKI;FUCHIGAMI, KATSUHIRO;TAKEUCHI, EIICHI;WAKOH, MASAMITSU;ONO, AKIHIRO |
分类号 |
G01N33/20;(IPC1-7):G01N33/20 |
主分类号 |
G01N33/20 |
代理机构 |
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