Process for producing tungsten heavy alloy sheet

Details Process for producing tungsten heavy alloy sheet Process for producing tungsten heavy alloy sheet

1987-11-23

1988-09-06

Combs, E. Michael

Metal deforming

By use of roller or roller-like tool-element

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

72364, 72700, 148 115F, B21B 300, C21D 802

Patent

active

047683651

ABSTRACT:
A process is disclosed for producing a tungsten heavy alloy sheet which involves rolling a starting slab consisting essentially of tungsten heavy alloy wherein the tungsten content is from greater than 75% to 93% by weight tungsten by passing the slab one or more times through a rolling mill at a temperature of from 700.degree. C. to 900.degree. C. to reduce the height of the slab by no greater than 10% per pass to a total reduction in height of from 15% to 25%, heating the resulting slab from the first series at a temperature of 1000.degree. C. to 1200.degree. C. for a sufficient time to anneal the matrix of the slab, subjecting the resulting first time annealed slab to a second series of rolling operations by passing the first time annealed slab one or more times through a rolling mill at a temperature of 700.degree. C. to 900.degree. C. to reduce the height of the first time annealed slab by up to about 15% per pass until a total reduction in height of a maximum of about 45% from the height of the first series rolled slab is accomplished, and heating the resulting slab from the second rolling series at a temperature of 1000.degree. C. to 1200.degree. C. for a sufficient time to anneal the matrix of the slab. The second rolling series and the following anneals are done any number of times to produce the sheet. When the tungsten content is less than about 75% by weight, the rolling series can be done without annealing.

REFERENCES:
patent: 1593181 (1926-07-01), Lederer

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