Production method for alloy 690 ordered alloy of improved thermal conductivity, and alloy 690 ordered alloy produced thereby

Patent metadata

Field	Value
Publication number	US-2016145730-A1
Application number	US-201414896647-A
Country	US
Kind code	A1
Filing date	Jun 5, 2014
Priority date	Jun 7, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

The present invention relates to ordered Alloy 690 with improved thermal conductivity. By maintaining Alloy 690 in a temperature range of 350-570° C. for a proper amount of time, the atomic arrangement is controlled to properly form the ordered phases. The ordered phases formed in the ordered Alloy 690 increases its thermal conductivity due to a low thermal scattering effect of the ordered phase as observed in pure metals.

First claim

1 . A method of manufacturing ordered Alloy 690 with improved thermal conductivity, the method comprising:
solution-annealing Alloy 690; thermally treating the solution-annealed Alloy 690 to manufacture Alloy 690 TT; and ordering the Alloy 690 TT by annealing in a temperature range of 350-570° C. to manufacture ordered Alloy 690.

2 . A method of manufacturing ordered Alloy 690 with improved thermal conductivity, the method comprising:
solution-annealing Alloy 690; thermally treating the solution-annealed Alloy 690 to manufacture Alloy 690 TT; and ordering the Alloy 690 TT by annealing in a temperature range of 350-570° C. before cooling the Alloy 690 TT to room temperature to manufacture ordered Alloy 690.

3 . A method of manufacturing ordered Alloy 690 with improved thermal conductivity, including the method where Alloy 690 TT is given the ordering treatment in a temperature range of 350-570° C.

4 . The method according to claim 1 , wherein the ordering treatment is performed on Alloy 690 TT in a temperature range of 400-510° C.

5 . The method according to claim 1 , wherein the thermal conductivity increase rate of the ordered Alloy 690 is 8% or more, as compared to before the ordering treatment.

6 . The method according to claim 4 , wherein the thermal conductivity increase rate of the ordered Alloy 690 is 8% or more, as compared to before the ordering treatment.

7 . The method according to claim 5 , wherein the ordering treatment is performed in a process of cooling at a rate of 1° C./min or lower.

8 . The method according to claim 6 , wherein the ordering treatment is performed in a process of cooling at a rate of 1° C./min and lower.

9 . The method according to claim 5 , wherein a process of cooling and heating is performed once or more times during the ordering treatment.

10 . The method according to claim 6 , wherein a process of cooling and heating is performed once or more times during the ordering treatment.

11 . The method according to claim 5 , wherein the ordering treatment is performed at two or more different temperatures.

12 . The method according to claim 6 , wherein the ordering treatment is performed at two or more different temperatures.

13 . The method according to claim 11 , wherein a process of cooling and heating is performed once or more times at the two or more different temperatures in the ordering treatment.

14 . The method according to claim 12 , wherein cooling and heating processes are performed one or more times at the two or more different temperatures in the ordering treatment.

15 . Ordered Alloy 690 with improved thermal conductivity manufactured by a manufacturing method according to claim 1 .

16 . Ordered Alloy 690 with improved thermal conductivity manufactured by a manufacturing method according to claim 4 .

17 . Ordered Alloy 690 with improved thermal conductivity manufactured by a manufacturing method according to claim 5 .

18 . Ordered Alloy 690 with improved thermal conductivity manufactured by a manufacturing method according to claim 6 .

Assignees

• Korea Atomic Energy Res

Inventors

• Kim Young-Suk
• Kim Sung-Soo
• Kim Dae-Whan

Classifications

• C22C19/058

  without Mo and W · CPC title

• C21D1/26

  Methods of annealing · CPC title

• C22F1/10 Primary

  of nickel or cobalt or alloys based thereon · CPC title

• C21D1/84

  Controlled slow cooling (cooling-beds for metal rolling B21B43/00) · CPC title