Brazing sheet formed from aluminum alloy
US-2018111232-A1 · Apr 26, 2018 · US
Flux-free brazing aluminum alloy brazing sheet
US11235428B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11235428-B2 |
| Application number | US-201916977900-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 5, 2019 |
| Priority date | Mar 7, 2018 |
| Publication date | Feb 1, 2022 |
| Grant date | Feb 1, 2022 |
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Abstract
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A flux-free brazing aluminum alloy brazing sheet includes: a core material formed of aluminum alloy comprising Si of 0.50 to 0.90 mass %, Cu of 0.30 to 2.50 mass %, and Mn of 1.40 to 1.80 mass %, with a Mg content limited to 0.05 mass % or less, and with the balance being Al and inevitable impurities; an intermediate material being formed of aluminum alloy comprising Mg of 0.40 to 1.00 mass %, and Zn of 2.00 to 6.00 mass %, with the balance being Al and inevitable impurities; and a brazing material being formed of aluminum alloy comprising Si of 6.00 to 13.00 mass %, Mg of 0.05 to 0.40 mass %, and Bi of 0.010 to 0.050 mass %, with the balance being Al and inevitable impurities.
First claim
Opening claim text (preview).
The invention claimed is: 1. An aluminum alloy brazing sheet used for brazing in an inert gas atmosphere without using a flux, the aluminum alloy brazing sheet comprising: a core material; an intermediate material cladded onto one side surface of the core material; and a brazing material cladded onto a side surface of the intermediate material opposite to a side surface on which the core material exists, wherein the core material is formed of aluminum alloy consisting of Si of 0.50 to 0.90 mass %, Cu of 0.30 to 2.50 mass %, and Mn of 1.40 to 1.80 mass %, with a Mg content limited to 0.05 mass % or less, and with the balance being Al and inevitable impurities, the intermediate material is formed of aluminum alloy consisting of Mg of 0.40 to 1.00 mass %, and Zn of 2.00 to 6.00 mass %, optionally Mn, with the balance being Al and inevitable impurities, and the brazing material is formed of aluminum alloy consisting of Si of 6.00 to 13.00 mass %, Mg of 0.05 to 0.40 mass %, and Bi of 0.010 to 0.050 mass %, optionally Sr, optionally Cu, with the balance being Al and inevitable impurities. 2. The aluminum alloy brazing sheet according to claim 1 , wherein the brazing material further comprises Sr of 0.001 to 0.05 mass %. 3. The aluminum alloy brazing sheet according to claim 1 , wherein the brazing material further comprises Cu of 0.02 to 1.20 mass %. 4. The aluminum alloy brazing sheet according to claim 1 , wherein the intermediate material further comprises Mn of 0.05 to 0.50 mass %.
Assignees
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Classifications
layered · CPC title
Al as the principal constituent · CPC title
Alloys based on aluminium · CPC title
Next to Al-base component · CPC title
all layers being formed of iron alloys or steels · CPC title
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- What does patent US11235428B2 cover?
- A flux-free brazing aluminum alloy brazing sheet includes: a core material formed of aluminum alloy comprising Si of 0.50 to 0.90 mass %, Cu of 0.30 to 2.50 mass %, and Mn of 1.40 to 1.80 mass %, with a Mg content limited to 0.05 mass % or less, and with the balance being Al and inevitable impurities; an intermediate material being formed of aluminum alloy comprising Mg of 0.40 to 1.00 mass %, …
- Who is the assignee on this patent?
- Uacj Corp, Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification B23K35/288. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 01 2022 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).