Agricultural discs

Details Agricultural discs Agricultural discs

1979-04-05

1981-12-15

Larson, Lowell A.

Metal deforming

With temperature modification of tool or of specified...

Cooling

72364, 148148, B21K 1900

Patent

active

043052720

ABSTRACT:
Agricultural discs are given a hardened annular run by providing a differential heat treatment. During the heat treatment step an annular ring of heat conductive material is placed on the outer periphery of the disc. Thus ensures that the outer edge is of greater hardness than the central portion of the disc.

REFERENCES:
patent: 153115 (1874-07-01), Robinson
patent: 488514 (1892-12-01), Arnold
patent: 1293078 (1919-02-01), Fulton
patent: 2326126 (1943-08-01), Dimmick
patent: 2327129 (1943-08-01), Ronan
patent: 2416742 (1947-03-01), Farr

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