Pipe and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-11932944-B2
Application number	US-202117758778-A
Country	US
Kind code	B2
Filing date	Jan 14, 2021
Priority date	Jan 17, 2020
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A pipe according to the present disclosure comprises: a hollow tube body in which fluids of different temperatures pass through the inside and outside thereof; and a coating layer which is provided on an external surface of the hollow tube body, and which has an alloy comprising an amorphous phase, wherein the alloy comprises Fe, and comprises at least one or more first component selected from the group consisting of Cr, Mo and Co, and at least one or more second component selected from the group consisting of B, C, Si and Nb.

First claim

The invention claimed is:

1. A pipe, comprising:
a hollow tube body in which fluids having different temperatures pass through the inside and the outside thereof; and
a coating layer provided on an external surface of the hollow tube body and having an alloy including an amorphous phase,
wherein the alloy includes iron (Fe),
a first component consisting of chromium (Cr) and molybdenum (Mo), and at least one or more second components selected from a group consisting of boron (B), carbon (C), silicon (Si) and niobium (Nb),
wherein the first component is included in 30 to 140 parts by weight based on 100 parts by weight of iron (Fe).

2. The pipe of claim 1 , wherein a coefficient of thermal expansion of the alloy is 1.0 to 1.4 times a coefficient of thermal expansion of the hollow tube body.

3. The pipe of claim 2 , wherein the hollow tube body is formed of a material including iron (Fe).

4. The pipe of claim 1 , wherein the second component is included in 4 to 20 parts by weight based on 100 parts by weight of Fe.

5. The pipe of claim 1 , wherein the second component is at least two or more selected from a group consisting of B, C, Si and Nb.

6. The pipe of claim 1 , wherein the alloy includes at least one or more third component selected from a group consisting of tungsten (W), yttrium (Y), manganese (Mn), aluminum (Al), zirconium (Zr), nickel (Ni), scandium (Sc) and phosphorus (P).

7. The pipe of claim 6 , wherein the third component is included in less than 1.125 parts by weight based on 100 parts by weight of Fe.

8. The pipe of claim 1 wherein a thickness of the coating layer is 100 μm to 600 μm.

9. The pipe of claim 1 wherein the coating layer has a coating density of 98 to 99.9%.

10. The pipe of claim 1 wherein a Vickers hardness of the coating layer is 700 to 1,200 Hv.

Assignees

• Kolon Inc

Inventors

• Cho Geun Sang
• Kim Choongnyun Paul
• Choi Kwan Min

Classifications

• C23C24/08 Primary

  by application of heat or pressure and heat (C23C24/04 takes precedence) · CPC title

• F16L58/08 Primary

  by metal · CPC title

• C23C4/16

  Wires; Tubes · CPC title

• C23C4/067

  containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic · CPC title

• C23C24/04

  Impact or kinetic deposition of particles · CPC title