Fabrication of alloys

• US 4,402,767 A
• Filed: 12/27/1982
• Issued: 09/06/1983
• Est. Priority Date: 12/27/1982
• Status: Expired due to Term

• Current Assignee: Owens- Corning Fiberglas Technology Incorporated (Owens Corning)
• Original Assignee: Owens-Corning Fiberglas Corporation
• Inventors: Robinson, Mark L., Lawson, Richard D., Hinze, Jay W.
• Primary Examiner(s): Stallard, W.
• Application Number:
  US06/453,632
• Time in Patent Office: 253 Days
• Field of Search: 148/11.5 P, 148/12 R
• US Class Current: 148/653
• CPC Class Codes: C03B 37/047 Selection of materials for the spinner cups
• CPC Class Codes: C03B 37/0805 Manufacturing, repairing, or other treatment of bushings, nozzles or bushing nozzle plates
• CPC Class Codes: C21D 8/005 of ferrous alloys C21D8/02 - C21D8/12 take precedence
• CPC Class Codes: C22F 1/10 of nickel or cobalt or alloys based thereon

Abstract

A process for producing an article of glass manufacture is disclosed in which oxide dispersion strengthened alloys are used to produce complicated shapes. The process includes a critical thermomechanical processing sequence to recrystallize the alloy into a coarse grain structure for high temperature service.

Claims

1. A process for producing an article of manufacture for glass making from a mechanically alloyed or oxide dispersion strengthened alloy including the steps of:

warm working the alloy at temperatures below its recrystallization temperature;

annealing the warm worked article to recrystallize the alloy to a coarse grain structure; and

hot forming the article of manufacture for glass making.

3. A process according to claims 1 or 2 wherein the annealing is carried out at temperatures above which substantial secondary recrystallization or grain growth occurs.

2. A process for producing an article of manufacture for glass making from a mechanically alloyed or oxide dispersion strengthened alloy including the steps of:

warm working the alloy at temperatures below which substantial recrystallization occurs;

hot forming the article of manufacture for glass making; and

annealing the hot formed article to effect recrystallization of the alloy to a coarse grain structure.

4. A process for producing spinners for forming glass fibers from a mechanically alloyed or oxide dispersion strengthened alloy including the steps of:

warm working the bar stock of the alloy at temperatures below which substantial recrystallization occurs to form a plate;

annealing the warm worked plate above this temperature to effect recrystallization to a coarse grain structure; and

hot spinning the annealed plate to the shape of a spinner.

5. A process according to claim 4 including the additional step of heat treating the spinner to develop a desired grain structure.

7. A process according to claim 4 or 6 wherein the alloy is an iron or nickel-based oxide dispersion strengthened alloy.

8. A process according to claim 4 or 6 wherein the step of hot spinning is carried out at a temperature ranging from about 538°

to 1205°

C. (1000°

to 2200°

F.).

9. A process according to claim 4 or 6 wherein the step of hot spinning is carried out at a temperature ranging from about 649°

to 760°

C. (1200°

to 1400°

F.).

10. A process according to claim 4 or 6 wherein the step of hot spinning is carried out at a temperature ranging from about 927°

to 1038°

C. (1700°

to 1900°

F.).

11. A process according to claim 4 or 6 wherein the step of annealing is carried out at a temperature below the melting point of the alloy.

12. A process according to claim 11 wherein the step of annealing is carried out at a temperature ranging from about 1093°

to 1649°

C. (2000°

to 3000°

F.) for a time ranging from 1 to 8 hours.

13. A process according to claim 11 wherein the step of annealing is carried out at a temperature ranging from about 1260°

to 1482°

C. (2300°

to 2700°

F.) for a time ranging from about 1 to 6 hours.

6. A process for producing spinners for forming glass fibers from a mechanically alloyed or oxide dispersion strengthened alloy including the steps of:

warm working bar stock of the alloy at temperatures below which substantial recrystallization occurs to form a plate;

hot spinning the warm worked plate to the shape of a spinner; and

annealing the spinner above the alloy'"'"'s recrystallization temperature to effect a coarse grain structure.