Method of producing abrasion resistant plastification elements f

Details Method of producing abrasion resistant plastification elements f Method of producing abrasion resistant plastification elements f

1975-02-10

1976-11-30

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 635, 148 14, 148143, C23C 907

Patent

active

039947505

ABSTRACT:
A method of producing highly abrasion resistant plastification screws and plastification cylinders for injection molding machines in which plastic materials with abrasive fillers are processed, the machined plastification elements being borided in a boron carbide packing and then hardened or tempered, the method involving the selection of a tool steel or temper steel whose austenitization temperature is below the highest boriding temperature, so that the elements can be hardened or tempered immediately after the boriding treatment, by chilling them with an inert gas, while they are still in contact with the boriding packing.

REFERENCES:
patent: 2921877 (1960-01-01), Samuel et al.
patent: 3222228 (1965-12-01), Stanley et al.
patent: 3325313 (1967-06-01), Galmiche
patent: 3567527 (1971-03-01), Pevar
patent: 3806374 (1974-04-01), Krzyminski

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