Method of producing a buildup valve for use in internal combusti

Details Method of producing a buildup valve for use in internal combusti Method of producing a buildup valve for use in internal combusti

1990-02-26

1992-01-28

Zimmerman, John J.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148903, 2988846, 2988845, 123188AA, C21D 602, C21D 900, F01L 304

Patent

active

050841130

ABSTRACT:
A buildup valve comprising a valve body of a quench-hardenable, heat resistant steel having a valve face and a buildup layer formed on the valve face from a cobalt or nickel base superalloy having higher wear and heat resistances than the heat resistant steel is useful in internal combustion engines. A hardened layer is formed in the valve face portion adjacent the buildup layer and has a maximum thickness between 0.05 mm and 2.0 mm. The buildup layer thus has a reduced thickness between 0.1 mm and 0.5 mm. The buildup valve is produced by supplying and depositing a powder of the alloy on the valve face, and applying a scanning high flux energy laser or plasma beam to the powder deposit to cause the powder to quickly melt and then quickly solidify thereby forming the buildup layer and at the same time, to cause a surface layer of the valve body underlying the powder deposit to quickly heat and then quickly cool thereby forming the hardened layer.

REFERENCES:
patent: 2664874 (1954-01-01), Graham
patent: 3349463 (1967-10-01), Kittelson
patent: 3649380 (1972-03-01), Tauschek
patent: 3952180 (1976-04-01), Gnanamuthu
patent: 4015100 (1977-03-01), Gnanamuthu et al.
patent: 4179316 (1979-12-01), Connors et al.
patent: 4182299 (1980-01-01), Earle et al.
patent: 4232094 (1980-11-01), Rhodes et al.
patent: 4447275 (1984-05-01), Hiraoka et al.
patent: 4513977 (1985-04-01), Umeha et al.
patent: 4532191 (1985-07-01), Humphries et al.
patent: 4708752 (1987-11-01), Kar
patent: 4781770 (1988-11-01), Kar
patent: 4787736 (1988-11-01), Mori et al.
patent: 4834036 (1989-05-01), Nishiyama et al.
"Laser Right on the Beam for Heat Treating Duty", Iron Age, Feb. 10,1975, pp. 45-47, 29/888.44.
Fiorietta, Carl, "Electron Beam Heat Treating", Metals Handbook, 9th ed., vol. 4, American Society for Metals, 1981, pp. 518-521.
Sandven, Ole, "Laser Surface Transformation Hardening", Metals Handbook, 9th ed., vol. 4, American Society for Metals, pp. 507-521.
Ayers, J. D., "Appendix Hardening of Metal Surfaces by Laser Processing", Metals Handbook, 9th ed., vol. 6, American Society for Metals, pp. 793-803.

Affiliated with

Also associated with

Rating

Method of producing a buildup valve for use in internal combusti 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 of producing a buildup valve for use in internal combusti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing a buildup valve for use in internal combusti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1858558