Title:
METHOD FOR MAKING INGOT OF LOW NITROGEN STEEL CONTAINING RARE EARTH ELEMENT
Document Type and Number:
Japanese Patent JP3149476
Kind Code:
B2
Abstract:
PURPOSE: To produce low nitrogen steel contg. a rare earth metal effective for improving the grindability of high V high-speed tool steel, etc.
CONSTITUTION: A consumable electrode optionally contg. a rare earth metal and having <1,000ppm nitrogen content is refined in a vacuum induction furnace on the 1st stage and subjected to electro-slag remelting with a flux contg. a rare earth metal on the 2nd stage.
Inventors:
Kiyotaka Kochio
Shigeru Kihara
Junichi Nishida
Yasushi Yamane
Norimasa Uchida
Hideki Nakamura
Shigeru Kihara
Junichi Nishida
Yasushi Yamane
Norimasa Uchida
Hideki Nakamura
Application Number:
JP26847891A
Publication Date:
March 26, 2001
Filing Date:
September 19, 1991
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
B22D23/10; C21C5/52; C21C7/00; C22B9/18; C22B9/187; C22C38/00; C22C38/22; C22C38/30; C22C38/34; (IPC1-7): C21C7/00; B22D23/10; C21C5/52; C22B9/18; C22C38/00
Domestic Patent References:
| JP6244535A | ||||
| JP3146624A | ||||
| JP61213350A |
Other References:
【文献】鉄と鋼、72〔4〕(1986)p.226