High-carbon iron-based amorphous alloy using molten pig iron and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9752205-B2
Application number	US-201514943110-A
Country	US
Kind code	B2
Filing date	Nov 17, 2015
Priority date	Aug 20, 2010
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Provided is an iron-based amorphous alloy and a method of manufacturing the same.
More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe α C β SiγBxPyCrz, wherein α, β, γ, x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein α is expressed by α=100−(β+γ+x+y+z) atomic %, β is expressed by 13.5 atomic %≦β≦17.8 atomic %, γ is expressed by 0.30 atomic %≦γ≦1.50 atomic %, x is expressed by 0.1 atomic %≦x≦4.0 atomic %, y is expressed by 0.8 atomic %≦y≦7.7 atomic %, and z is expressed by 0.1 atomic %≦z≦3.0 atomic %.

First claim

What is claimed is:

1. A method of manufacturing a high carbon iron-based amorphous alloy comprising:
preparing molten pig iron containing carbon (C) of at least 13.5 atomic %;
adding at least one of Fe—Si alloy, Fe—B alloy, Fe—P alloy and Fe—Cr alloy into the molten pig iron and melting the alloy into the molten pig iron to prepare a molten composition expressed by the following general formula: Fe α C β Si γ B x P y Cr z , where α, β, γ, x, y and z are respective atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P) and chromium (Cr), wherein a is expressed by α=100−(β+γ+x+y+z) atomic %, β is expressed by 13.5 atomic %≦β≦17.8 atomic %, γ is expressed by 0.30 atomic %≦γ≦1.50 atomic %, x is expressed by 0.1 atomic %≦x≦4.0 atomic %, y is expressed by 0.8 atomic %≦y≦7.7 atomic % and z is expressed by 0.1 atomic %≦z≦3.0 atomic %; and
rapidly quenching the molten composition to form the iron-based amorphous alloy.

2. The method of manufacturing a high carbon iron-based amorphous alloy of claim 1 , wherein:
the molten pig iron contains iron (Fe) of 80.4 atomic %≦Fe≦85.1 atomic %, carbon (C) of 13.5 atomic %≦C≦17.8 atomic %, silicon (Si) of 0.3 atomic %≦Si≦1.5 atomic %, phosphorus (P) of 0.2 atomic %≦P≦0.3 atomic %.

3. The method of manufacturing a high carbon iron-based amorphous alloy of claim 1
further comprising melting the alloy after quenching and again rapidly quenching into an amorphous alloy.

4. The method of manufacturing a high carbon iron-based amorphous alloy of claim 2 , wherein:
the rapidly quenching is carried out by one of rapidly quenching a mold directly, a melt spinning, and an atomizing method.

5. The method of manufacturing a high carbon iron-based amorphous alloy of claim 1 , wherein:
the high carbon iron-based amorphous alloy is any one of a ribbon shape, bulk, and powder.

6. The method of manufacturing a high carbon iron-based amorphous alloy of claim 2 , wherein:
the high carbon iron-based amorphous alloy is any one of a ribbon shape, bulk, and powder.

7. The method of manufacturing a high carbon iron-based amorphous alloy of claim 3 , wherein:
the high carbon iron-based amorphous alloy is any one of a ribbon shape, bulk, and powder.

8. The method of manufacturing a high carbon iron-based amorphous alloy of claim 4 , wherein:
the high carbon iron-based amorphous alloy is any one of a ribbon shape, bulk, and powder.

Assignees

• Res Inst Ind Science & Tech
• Posco

Inventors

• Kim Sang-Won
• Yoon Sang-Hoon
• Yi Seong Hoon
• Son Young-Geun
• Park Eon-Byeong
• Kwon Oh Joon
• Ha Sang-Wook
• Choi Seung-Dueg
• Byun Gab-Sik

Classifications

• C22C45/02

  with iron as the major constituent · CPC title

• C22C1/11

  Making amorphous alloys · CPC title

• C21D1/00

  General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering · CPC title

• C21D5/00

  Heat treatments of cast-iron · CPC title

• C22C33/003

  making amorphous alloys · CPC title