Method for rolling and heat treating small diameter stainless st

Details Method for rolling and heat treating small diameter stainless st Method for rolling and heat treating small diameter stainless st

Filed on

1984-07-30

Date issued

1986-04-08

Examiner

Stallard, Wayland

Patent Class

Metal treatment

SubClass

Compositions

SubSubClass

Heat treating

Other Related Categories

148 12E, C21D 714

Type

Patent

Status

active

Patent number

045810788

Description

ABSTRACT:
A method for rolling and heat treating small diameter stainless steel rod, comprising the following sequence of steps: cooling the rod prior to and during finish rolling to increase its stiffness; passing the rod through a sizing mill to achieve close tolerances; subjecting the rod to additional water cooling to thereby improve its resistance to surface scratching; forming the rod into rings which are received in an offset pattern on an open moving conveyor; subjecting the offset rings moving along the conveyor to a solid solutioning treatment by reheating and water quenching the same; and then air cooling and drying the rings before collecting them into coils.

REFERENCES:
patent: 4168993 (1979-09-01), Wilson et al.
patent: 4174981 (1979-11-01), Cassell
patent: 4295900 (1981-10-01), Malmgren et al.
patent: 4360390 (1982-11-01), Tominaga et al.
patent: 4369645 (1983-01-01), Brauer

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