Heat treatment pots

Details Heat treatment pots Heat treatment pots

1974-03-26

1976-07-20

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With modification or control of temperature of work, tool or...

72 83, B21D 2216

Patent

active

039699170

ABSTRACT:
A heat treatment pot for holding molten salts is produced by a spinning process to form the body of the pot from a substantially circular disc blank of heat resisting nickel chromium alloy. In the spinning process, a mandrel is utilized which has a circular end face and an external shape and cross-sectional dimensions complementary to the internal shape and dimensions of said body. The initial diameter of the blank is greater than the diameter of the circular end face of the mandrel by an amount which exceeds at least 90% of the required depth of said body. The blank is applied against the mandrel end face and the spinning process is carried out only to an extent sufficient to bend the blank so as to conform to the shape of the mandrel and to extend the blank along the length of said mandrel for a distance substantially equal to said depth of the body of the pot. The disc blank may be of laminate metal sheet comprising a layer of the nickel chromium alloy clad with a layer of mild steel.

REFERENCES:
patent: 358438 (1887-03-01), Duff
patent: 438407 (1890-10-01), Dewey
patent: 648929 (1900-05-01), Deming
patent: 3355920 (1967-12-01), Ellenburg
patent: 3372567 (1968-03-01), Jensen et al.
Metals Handbook, 8th Ed., vol. 4, pp. 434 & 435, American Society For Metals, 1969.
"Metal Spinning By Modern Methods," Machinery, Nov. 1945, vol. 52, No. 3, pp. 141-148, by Edwin Weiss.

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