Steel material

Details Steel material Steel material

2002-03-20

2009-11-24

King, Roy (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

C148S230000, C148S318000, C148S319000

Reexamination Certificate

active

07622009

ABSTRACT:
A raw steel is coated with or surrounded by a boron compound (step S1). A coating film of h-BN is formed on the surface of the raw steel. Then, the raw steel is nitrided by a nitriding gas while being heated (step S2). B from the boron compound and N from the nitriding gas are diffused into the raw steel, turning the raw steel into a steel material containing B and N. Most of B and N are present as an Fe (B, N) solid solution or an Fe (C, B, N) solid solution in the structure of the steel material. The raw steel is heated and nitrided under conditions such that B and N are contained ranging from 7 to 30 ppm by weight and ranging from 10 to 70 ppm by weight, respectively.

REFERENCES:
patent: 3146616 (1964-09-01), Loyd
patent: 4011107 (1977-03-01), Hayes
patent: 4177091 (1979-12-01), Fiedler
patent: 4297387 (1981-10-01), Beale
patent: 4375377 (1983-03-01), Ohtani et al.
patent: 4806175 (1989-02-01), Wendt
patent: 5629099 (1997-05-01), Sakurai et al.
patent: 5900077 (1999-05-01), McVicker et al.
patent: 6294029 (2001-09-01), Sakate et al.
patent: 2022907 (1991-02-01), None
patent: 1318887 (1973-05-01), None
patent: 49-105712 (1974-10-01), None
patent: 52-145345 (1977-12-01), None
patent: 53-142933 (1978-12-01), None
patent: 55-161063 (1980-12-01), None
patent: 58-039775 (1983-03-01), None
patent: 4-128313 (1992-04-01), None
patent: 04-128313 (1992-04-01), None
patent: 7-84639 (1995-09-01), None
patent: 8-176733 (1996-07-01), None
patent: 8-193242 (1996-07-01), None
patent: 2661650 (1997-06-01), None
patent: 2474400 (1998-02-01), None
patent: 2747400 (1998-02-01), None
patent: 10-152746 (1998-06-01), None
patent: 11-012685 (1999-01-01), None
patent: 11012685 (1999-01-01), None
patent: 11-229078 (1999-08-01), None
patent: 2000-63935 (2000-02-01), None
patent: 2000-160287 (2000-06-01), None
patent: 2000-219934 (2000-08-01), None
patent: 2000-282170 (2000-10-01), None
patent: 2000-303161 (2000-10-01), None
patent: 4-128313 (2002-09-01), None
Davis et al., The ASM Handbook, Aug. 31, 1991, vol. 4, pp. 312-315.
Machine Translation of Eguchi (JP 10-152746).
English Translation of Eguchi (JP 10-152746).
Patnaik, Pradyot (2003). Handbook of Inorganic Chemicals., “Ammonia”, (pp. 20-23). McGraw-Hill. Online version available at:http://www.knovel.com/knovel2/Toc.jsp?BookID=688&VerticalID=0.
Merriman, A.D., 1958, A Dictionary of Metallurgy, “Induction Heating”, pp. 136, Richard Clay and Company, Ltd., Bungay, Suffolk.

Affiliated with

Also associated with

Rating

Steel material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Steel material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steel material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4101899