Method for producing high chromium steels having extremely low c

Details Method for producing high chromium steels having extremely low c Method for producing high chromium steels having extremely low c

1978-01-27

1979-10-09

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, 75 60, 751305, C21C 710, C22C 3300

Patent

active

041704673

ABSTRACT:
High chromium steels having extremely low carbon and nitrogen contents are produced by blowing more than 15 up to 40 Nl/min per ton of molten steel of an inert gas into a high chromium steel containing 0.8 to 2.5% of C and 10 to 35% of Cr in a ladle under a reduced pressure from bottom of a ladle and concurrently blowing oxygen gas to the molten steel surface to form 1 to 100 kg per ton of the molten steel of a slag containing not less than 20% of SiO.sub.2 and not more than 25% of Cr.sub.2 O.sub.3 at the end of oxygen blowing, terminating the oxygen blowing when the carbon concentration in the molten steel becomes not more than 0.020%, and subsequently blowing 6 to 40 Nl/min per ton of molten steel of an inert gas under a high vacuum of not more than 10 torr.

REFERENCES:
patent: 3773496 (1973-11-01), Knuppel
patent: 3788836 (1974-01-01), Muscatell
patent: 3854932 (1974-12-01), Bishop
patent: 3971655 (1976-07-01), Takashima
patent: 3976473 (1976-08-01), Katayama
patent: 4001009 (1977-01-01), Bauer

Affiliated with

Also associated with

Rating

Method for producing high chromium steels having extremely low c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for producing high chromium steels having extremely low c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing high chromium steels having extremely low c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1963937