Mechanically conformable micro-heat exchangers and methods for use in thermal management of target components
US-2016231071-A1 · Aug 11, 2016 · US
Copper alloy tube for heat exchanger excellent in fracture strength
US9671182B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9671182-B2 |
| Application number | US-25434508-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 20, 2008 |
| Priority date | Oct 23, 2007 |
| Publication date | Jun 6, 2017 |
| Grant date | Jun 6, 2017 |
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Abstract
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The present invention provides a copper alloy tube for heat exchangers which is tolerable to a high operating pressure of new cooling media such as carbon dioxide and HFC-based fluorocarbons, and is excellent in fracture strength, even if the tube is thinned, and a copper alloy tube for a heat exchanger which has a composition having specified amounts of Sn and P, has an average crystal grain size of 30 μm or less and has a high strength of 250 MPa or more of a tensile strength in the longitudinal direction of the tube improves the fracture strength as a texture in which the orientation distribution density in the Goss orientation is 4% or less.
First claim
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What is claimed is: 1. A copper alloy tube for a heat exchanger having a fracture strength of at least 42 MPa, wherein the copper alloy tube comprises Sn:0.1 to 3.0% by mass and P:0.005 to 0.1% by mass, the remainder has a composition made from Cu and inevitable impurities, the average crystal grain size is 30 μm or less, and the longitudinal tensile strength of the tube is 250 MPa or more, and wherein the copper alloy tube comprises: a texture whose orientation distribution density in the Goss orientation is 4% or less, and wherein the proportion of the low-angle grain boundaries of the inclination angle 5 to 15° in the texture of the copper alloy tube is 1% or more. 2. The copper alloy tube for a heat exchanger excellent in fracture strength according to claim 1 , further comprising: Zn: 0.01 to 1.0% by mass. 3. The copper alloy tube for a heat exchanger excellent in fracture strength according to claim 1 , further comprising: less than 0.07% of the total amount of one or two or more kinds of elements selected from the group consisting of Fe, Ni, Mn, Mg, Cr, Ti and Ag.
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- What does patent US9671182B2 cover?
- The present invention provides a copper alloy tube for heat exchangers which is tolerable to a high operating pressure of new cooling media such as carbon dioxide and HFC-based fluorocarbons, and is excellent in fracture strength, even if the tube is thinned, and a copper alloy tube for a heat exchanger which has a composition having specified amounts of Sn and P, has an average crystal grain s…
- Who is the assignee on this patent?
- Takagi Toshiaki, Aruga Yasuhiro, Nagao Mamoru, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification F28F21/08. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 06 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).