Aluminum alloy for a welded construction and welded joint using the same

• US 20020197506A1
• Filed: 07/30/2002
• Published: 12/26/2002
• Est. Priority Date: 04/28/1999
• Status: Abandoned Application

• Current Assignee: Noboru Hayashi, Seizo Ueno, Yoichiro Bekki
• Original Assignee: Noboru Hayashi, Seizo Ueno, Yoichiro Bekki
• Inventors: Ueno, Seizo, Hayashi, Noboru, Bekki, Yoichiro
• Application Number:
  US10/210,586
• Publication Number:
  US 20020197506A1
• Time in Patent Office: Days
• US Class Current: 428/654
• CPC Class Codes: B23K 2103/10 Aluminium or alloys thereof
• CPC Class Codes: B23K 35/286 Al as the principal constituent
• CPC Class Codes: B23K 35/288 with Sn or Zn
• CPC Class Codes: Y10S 428/934 Electrical process
• CPC Class Codes: Y10T 428/12569 Synthetic resin
• CPC Class Codes: Y10T 428/12764 Next to Al-base component

Abstract

Disclosed is an Al alloy for a welded construction having excellent welding characteristics, which Al alloy comprises 1.5 to 5 wt % of Si (hereinafter, wt % is referred to as %), 0.2 to 1.5% of Mg, 0.2 to 1.5% of Zn, 0.2 to 2% of Cu, 0.1 to 1.5% of Fe, and at least one member selected from the group consisting of 0.01 to 1.0% of Mn, 0.01 to 0.2% of Cr, 0.01 to 0.2% of Ti, 0.01 to 0.2% of Zr, and 0.01 to 0.2% of V, with the balance being Al and inevitable impurities. Also disclosed is a welded joint having this Al alloy base metal welded with an Al—Mg— or Al—Si-series filler metal.

Claims

1. An aluminum alloy comprising:

a percent by weight of;

approximately 2.6 to 5% silicon;

approximately 0.2 to 0.8% magnesium;

approximately 0.2 to 1.5% zinc;

approximately 0.2 to 2% copper;

approximately 0.1 to 1.5% iron;

at least one additional ingredient selected from the group consisting of a percent by weight of approximately 0.01 to 1% manganese, 0.01 to 0.2% chromium, 0.01 to 0.2% titanium, 0.01 to 0.2% zirconium, and 0.01 to 0.2% vanadium; and

a balance of aluminum including inevitable impurities.

2. A method of welding comprising:

forming a joint between two pieces of aluminum alloy base metal wherein the aluminum alloy comprises a percent by weight of;

approximately 1.5 to 5% silicon;

approximately 0.2 to 1.5% magnesium;

approximately 0.2 to 1.5% zinc;

approximately 0.2 to 2% copper;

approximately 0.1 to 1.5% iron;

at least one additional ingredient selected from the group consisting of a percent by weight of approximately 0.01 to 1% manganese, 0.01 to 0.2% chromium, 0.01 to 0.2% titanium, 0.01 to 0.2% zirconium, or 0.01 to 0.2% vanadium;

a balance of aluminum including inevitable impurities; and

welding said joint with an aluminum alloy filler material comprising 2 to 6% by weight of magnesium.

3. The method of claim 2 wherein said base metal comprises 2.6 to 5% by weight silicon.

4. The method of claim 2 further comprising heat treating said joint.

5. A welded joint made by the method of claim 2.

14. The welded joint of claim 5, wherein said joint comprises:

approximately 0.5 to 4% silicon;

approximately 1.0 to 5.5% magnesium;

approximately 0.05 to 1.4% copper; and

a balance of aluminum including inevitable impurities.

6. A welded joint comprising:

approximately 0.5 to 4% silicon;

approximately 1.0 to 5.5% magnesium;

approximately 0.05 to 1.4% copper; and

a balance of aluminum including inevitable impurities.

7. The welded joint of claim 6 wherein said joint is heat treated at at most 220°

C.

8. A method of welding comprising:

forming a joint between two pieces of aluminum alloy base metal wherein the aluminum alloy comprises a percent by weight of;

approximately 1.5 to 5% silicon;

approximately 0.2 to 1.5% magnesium;

approximately 0.2 to 1.5% zinc;

approximately 0.2 to 2% copper;

approximately 0.1 to 1.5% iron;

at least one additional ingredient selected from the group consisting of a percent by weight of approximately 0.01 to 1% manganese, 0.01 to 0.2% chromium, 0.01 to 0.2% titanium, 0.01 to 0.2% zirconium, or 0.01 to 0.2% vanadium;

a balance of aluminum including inevitable impurities; and

welding said joint with an aluminum alloy filler material comprising 3 to 13% by weight silicon.

9. The method of claim 8 wherein said aluminum alloy base metal comprises 2.6 to 5% by weight silicon.

10. The method of claim 8 further comprising heat treating said joint.

11. A welded joint made by the method of claim 8.

13. The welded joint of claim 12 wherein said joint is heat treated at at most 220°

C.

15. The welded joint of claim 11, wherein said joint comprises:

approximately 2.0 to 11% silicon;

approximately 0.5 to 1.4% magnesium;

approximately 0.05 to 1.8% copper; and

a balance of aluminum including inevitable impurities.

12. A welded joint comprising:

approximately 2.0 to 11% silicon;

approximately 0.05 to 1.4% magnesium;

approximately 0.05 to 1.8% copper; and

a balance of aluminum including inevitable impurities.