Metal treatment – Compositions – Heat treating
Patent
1983-06-09
1985-09-10
Rutledge, L. Dewayne
Metal treatment
Compositions
Heat treating
148 12B, 148 36, 148 39, 411361, C21D 800
Patent
active
045404470
ABSTRACT:
This disclosure relates to swage type fasteners including a pin having a plurality of combination locking and breakneck grooves and a collar adapted to be swaged into the grooves with one of the grooves acting as a breakneck whereby the excess length of pin is severed generally at the end of the collar and also relates to a method of making the pin. The multigrip pin is formed generally into its final shape and then is subject to a heat treating process to provide a desirable microstructure whereby more consistent breaks at the selected groove occurs. In one form of the invention a desirable microstructure consists of predominantly pearlite colonies with a proeutectoid ferrite matrix interspersed at the boundaries of pearlite colonies.
REFERENCES:
patent: 3532560 (1970-10-01), Tomioka et al.
patent: 3701694 (1972-10-01), Osuka
patent: 4049473 (1977-09-01), Davis, II et al.
patent: 4202710 (1980-05-01), Naito et al.
patent: 4208943 (1980-06-01), Smith
patent: 4386972 (1983-06-01), Knight
"Making Shaping and Treating of Steel", 9th Edition, pp. 1087, 1096-1097, .COPYRGT.1971.
Brody Christopher W.
Huck Manufacturing Company
Rutledge L. Dewayne
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