Preparation of phosphorus containing metallic glass forming alloy melts

• US 4,175,950 A
• Filed: 07/17/1978
• Issued: 11/27/1979
• Est. Priority Date: 07/17/1978
• Status: Expired due to Term

• Current Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Original Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Inventors: Linares, Robert C., Ambasz, Wiktor
• Primary Examiner(s): Rosenberg, P. D.
• Application Number:
  US05/925,579
• Time in Patent Office: 498 Days
• Field of Search: 75/53-58, 75/257, 75/82
• US Class Current: 75/10.15
• CPC Class Codes: C22B 9/10 with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agentsC22B9/18 takes precedenceC22B9/006 takes precedence

Abstract

Phosphorus rich transition metal alloys are protected by a layer of boron oxide during the melting process. The presence of the boron oxide layer prevents the evaporation of phosphorus values.

Claims

1. In the process of melting phosphorus-containing glass forming transition metal alloys the improvement which comprises covering the exposed surface of said metal alloy with a layer of a molten flux composition comprising boron trioxide of at least about 95 weight percent purity.

2. The improvement of claim 1 wherein said alloy has a phosphorus content of between about 3 weight percent and about 25 weight percent.

3. The improvement of claim 1 wherein the metal alloy is in a molten state.

4. The improvement of claim 3 wherein said flux in contact with the melt is at a temperature within the range of about 900°

C. and 1400°

C.

5. The improvement of claim 1 wherein the flux composition is employed in amount sufficient to provide a flux layer of between about 2 and 50 mm thickness.

6. The improvement of claim 1 wherein the phosphorus is supplied to the melt in the form of ferrophosphorus.

7. The improvement of claim 1 wherein the molten metal alloy additionally contains boron.