Metal treatment – Compositions – Heat treating
Patent
1985-07-03
1988-09-27
Yee, Deborah
Metal treatment
Compositions
Heat treating
148319, C21D 900
Patent
active
047739479
ABSTRACT:
A case hardening steel which consists essentially of 0.03-0.2 wt % of C, 1.0-3.0 wt % of Si, 0.2-2.0 wt % of Mn, 0.05-0.5 wt % of V and the balance of Fe. The primary advantage of this steel is fineness of grain size after carburizing at relatively high temperatures. Even when carburizeed at or above 950.degree. C., the grain size number is not smaller than 6 in both the hardened case and the core. Optionally the steel may contain up to 2.0 wt % of Ni, up to 2.0 wt % of Cr and/or up to 0.5 wt % of Mo for the reinforcing purpose, and/or up to 0.1 wt % of Al, up to 0.3 wt % of Ti, up to 0.1 wt % of Zr, up to 0.03 wt % of N and/or up to 0.5 wt % of Nb+Ta for the purpose of depressing the grain growth.
REFERENCES:
patent: 3661656 (1972-05-01), Jarleborg
patent: 3897618 (1975-08-01), Church
patent: 4119443 (1978-10-01), Abe et al.
patent: 4157258 (1979-06-01), Philip et al.
patent: 4358317 (1982-11-01), Abe
Cuddy et al., Metallurgical Transactions A, "Austenite Grain Coarsening in Microalloyed Steels", vol. 14A, Oct. 1983, pp. 1989-1995.
T. Gladman, et al., Journal of the Iron and Steel Institute, "Grain-Coarsening of Austenite", Jun. 1967, pp. 653-664.
Ike Masahide
Isokawa Kenji
Shibata Kimihiro
Takada Katsunori
Daido Tokushuko Kabushiki Kaisha
Nissan Motor Co,. Ltd.
Yee Deborah
LandOfFree
Manufacturing process for high temperature carburized case harde does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manufacturing process for high temperature carburized case harde, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacturing process for high temperature carburized case harde will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2396485