Maraging steel and method of producing the same

Details Maraging steel and method of producing the same Maraging steel and method of producing the same

2003-11-19

2008-11-04

King, Roy (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

C148S228000, C075S010230, C075S010250

Reexamination Certificate

active

07445678

ABSTRACT:
Disclosed is a method of producing maraging steel, which includes producing a consumable electrode for vacuum remelting; and subjecting the consumable electrode to the vacuum remelting. The consumable electrode contains not less 5 ppm Mg. Disclosed is also a maraging steel containing, by mass %, at least, from more than zero to less than 10 ppm Mg, less than 10 ppm oxygen, and less than 15 ppm nitrogen. The steel contains also nitride inclusions having a maximum length of not more than 15 μm and oxide inclusions having a maximum length of not more than 20 μm. Regarding the oxide inclusions, a content rate of spinel form inclusions having a length of not less than 10 μm to a total content of the spinel form inclusions having a length of not less than 10 μm and alumina inclusions having a length of not less than 10 μm exceeds 0.33 (i.e. 33%).

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Database WPI Section Ch, week 197648 Derwent Publication Ltd., London, GB; AN 1976-90042X XP002270875, SU 502974, one page abstract, May 24, 1976.

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