US 5,744,255 A · Aluminum alloy brazing material and brazing sheet adaptable for heat exchanges

Abstract

A typical aluminum alloy brazing material includesover 7.0 wt. % and not more than 12.0 wt. % of Si: over 0.1 wt. % and not more than 8.0 wt. % of Cu. over 0.05 wt. % and not more than 0.5 wt. % or Fe, further at least one kind selected from a group consisting of over 0.5 wt. % and not more than 5.5 wt. % of Zn. over 0.002 wt. % and not more than 0.3 wt % of In and over 0.002 wt. % and not more than 0.3 wt. % of Sn, and the balance of Al an inevitable impurities. A typical cladded aluminum alloy brazing sheet with a three-layer structure includes a brazing material, a core material comprising over 0.6 wt. % and not more than 2.5 wt. % of Si, over 0.5 wt. % and not more 2.5 wt. % of Cu, over 0.05 wt. % and not more than 2.0 wt. % of Mn, and the balance of Al and inevitable impurities, and a sacrificial material comprising at least one kind selected from a group consisting of over 0.5 wt. % and not more than 6.0 wt. % of Zn. over 0.002 wt. % and not more than 0.3 wt. % of In, and over 0.002 wt. % and not more than 0.3 wt. % of Sn, and the balance of Al and inevitable impurities, or comprises a core material cladded both sides thereof with the brazing material. By using the inventive brazing materials or brazing sheets, the brazing heating can be performed at a temperature of 570.degree. to 585.degree. C.

Claims20

Dependent claims

An aluminum alloy brazing sheet comprising, in weight percent:

a brazing material, a core material and a sacrificial material;
said brazing material being an aluminum alloy including from about 7.0% to about 12.0% of Si, over 0.8% to about 8.0% of Cu, and from about 0.05% to about 0.5% of Fe;
said brazing material further including at least one member selected from the group consisting of from about 0.5% to about 5.5% of Zn, from about 0.002% to about 0.3% of In and from about 0.002% to about 0.3% of Sn;
a balance of said brazing material being substantially Al and inevitable impurities;
said core material being an aluminum alloy including from about 0.6% to about 2.5% of Si, from about 0.5% to about 2.5% of Cu co-existing with said Si, and from about 0.05% to about 2.0% of Mn;
a balance of said core material being substantially Al and inevitable impurities;
said sacrificial material being an aluminum alloy including at least one member selected from the group consisting of from about 0.5% to about 6.0% of Zn, from about 0.002 to about 0.3% of In, and from about 0.002% to about 0.3% of Sn;
and
a balance of said sacrificial material being substantially Al and inevitable impurities.

6 more elements

An aluminum alloy brazing sheet comprising, in weight percent:

a brazing material, a core material and a sacrificial material;
said brazing material being an aluminum alloy including from about 7.0% to about 12.0% of Si, over 0.5% to about 8.0% of Cu, and from about 0.05% to about 0.5% of Fe;
said brazing material further including at least one member selected from the group consisting of from about 0.5% to about 5.5% of Zn, from about 0.002% to about 0.3% of In, and from about 0.002% to about 0.3% of Sn;
a balance of said brazing material being substantially Al and inevitable impurities;
said core material being an aluminum alloy including from about 1.2% to about 2.5% of Si, from about 0.5% to about 2.5% of Cu, and from about 0.05% to about 2.0% of Mn;
a balance of said core material being substantially Al and inevitable impurities;
a sacrificial material being an aluminum alloy including at least one member selected from the group consisting of from about 0.5% to about 6.0% of Zn, from about 0.002 to about 0.3% of In, and from about 0.002% to about 0.3 wt. % of Sn;
and
a balance of said sacrificial material being substantially Al and inevitable impurities.

6 more elements

An aluminum alloy brazing sheet for heat-exchangers comprising, in weight percent;

a brazing material, a core material and a sacrificial material;
said brazing material being an aluminum alloy including from about 7.0% to about 12.0% of Si, over 0.8% to about 8.0% of Cu, and from about 0.05% to about 0.5% of Fe;
said brazing material further including at least one member selected form a group consisting of from about 0.5% to about 5.5% of Zn, from about 0.002% to about 0.3% of In and from about 0.002% to about 0.3% of Sn;
a balance of said brazing material being substantially Al and inevitable impurities;.
said core material being an aluminum alloy including from about 0.6% to about 2.5% of Si, from above 0.8% to about 2.5% of Cu, and from about 0.05% to about 2.0% of Mn;
a balance of said core material being substantially Al and inevitable impurities;
said sacrificial material being an aluminum alloy including at least one member selected from the group consisting of from about 0.5% to about 6.0% of Zn, from about 0.002 to about 0.3% of In, and from about 0.002% to about 0.3% of Sn;
and
a balance of said sacrificial material being substantially Al and inevitable impurities.

6 more elements

An aluminum alloy brazing sheet for heat-exchangers comprising, in weight percent:

a brazing material, a core material, and a sacrificial material;
said brazing material being an aluminum alloy including from about 7.0% to about 12.0% of Si, over 0.5% to about 8.0% of Cu, and from about 0.05% to about 0.5% of Fe:
said brazing material further including at least one member selected form a group consisting of from about 0.5% to about 5.5% of Zn, from about 0.002% to about 0.3% of In and from about 0.002% to about 0.3% of Sn;
a balance of said brazing material being substantially Al and inevitable impurities;
said core material being an aluminum alloy including from about 1.2% to about 2.5% of Si, from above 0.8% to about 2.5% of Cu, and from about 0.05% to about 2.0% of Mn;
a balance of said core material being substantially Al and inevitable impurities;
said sacrificial material being an aluminum alloy including at least one member selected from the group consisting of from about 0.5% to about 6.0% of Zn, from about 0.002 to about 0.3% of In, and from about 0.002% to about 0.3% of Sn;
and
a balance of said sacrificial material being substantially of Al and inevitable impurities.

6 more elements

An aluminum alloy brazing sheet consisting essentially of, in weight percent:

a brazing material, a core material and a sacrificial material;
said brazing material being an aluminum alloy further consisting essentially of from about 7.0% to about 12.0% of Si, over 0.8%. to about 8.0% of Cu, and from about 0.05% to about 0.5% of Fe;
said brazing material further consisting essentially of at least one member selected from the group consisting of from about 0.5% to about 5.5% of Zn, from about 0.002% to about 0.3% of In and from about 0.002% to about 0.3% of Sn;
a balance of said braising material being substantially Al and inevitable impurities;
said core material being an aluminum alloy further consisting essentially of from about 0.6% to about 2.5% of Si, from about 0.5% to about 2.5% of Cu co-existing with said Si, and from about 0.05% to about 2.0% of Mn;
a balance of said core material being substantially Al and inevitable impurities;
said sacrificial material being an aluminum alloy further consisting essentially of at least one member selected from the group consisting of from about 0.5% to about 6.0% of Zn, from about 0.002 to about 0.3% of In, and from about 0.002% to about 0.3% of Sn;
and
a balance of said sacrificial material being substantially Al and inevitable impurities.

6 more elements

Dependencies are inferred from the claim text.

Aluminum alloy brazing material and brazing sheet adaptable for heat exchanges

Life of this patent

Aluminum alloy brazing material and brazing sheet adaptable for heat exchanges

Life of this patent

Abstract

Claims20