Thixotropic materials

Details Thixotropic materials Thixotropic materials

1990-01-25

1991-08-06

Dean, R.

Metal treatment

Compositions

Heat treating

148 1, 148 4, 148 115A, 420528, 420590, C22F 104

Patent

active

050374893

ABSTRACT:
A method of producing a thixotropic material is provided which consists of deforming a fully solidified metal or metal alloy below its temperature of recrystallization by cold or warm working such as extrusion or rolling. The deformed material is then caused to recrystallize by heating and the temperature is either further raised or subsequently raised above the solidus of the material so that the recrystallized structure partially melts to provide discrete particles which spheroidize in the liquid matrix to provide a material which behaves thixotropically. The flow characteristics of the material are such that lower forming loads are required and weaker non-metallic die materials may be used.

REFERENCES:
patent: 3948650 (1976-04-01), Flemings
patent: 3954455 (1976-05-01), Flemings
patent: 4295896 (1981-10-01), Flemings et al.

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