At present, copper and zinc are substantially price increases, insiders are invariably looking for alternatives. And for the water heating equipment and decoration industry, and other mechanical and electrical manufacturing industry, with high-strength deformation of aluminum instead of copper and zinc, not only with industrial technology feasibility, but also bring good economic benefits.

1. Replacement of Copper Alloy and Zinc Alloy with High Strength Deformation Aluminum Alloy from Comprehensive Mechanical Properties

1.1 Comparison of tensile strength

The most widely used copper alloy is HPb59-1 brass, the tensile strength of 370-450Mpa. While the tensile strength of zinc alloy is only 250-320Mpa.

The tensile strength of deformed aluminum alloys such as LD2-2 (6070), LD10 (2014), LD30 (6061), LD31 (6063), LY12 (2024,2124), LY16 (2219), LC4 (7075) -570Mpa between.

The following table shows that the tensile strength of the 2024 and 2124 grades is exactly the same as that of brass, while the tensile strength of the 6061 deformed aluminum alloy is 310 MPa, which is opposite to the zinc alloy.

1.2 hardness aspects

HPb59-1 hardness is generally greater than HB80, and 6061 hardness HB95 almost, and 2024,2124 hardness is greater than HB135.

Die-cast zinc alloy hardness HB80-95, and 6061 hardness HB95 almost.

1.3 elongation aspects

HPb59-1 extrusion material elongation of 10-16%, as the casting of the lower than the value, and 6061,7075 hard aluminum alloy 10-12% rather.

Die-cast zinc alloy elongation is only 1-2%, very low. Any kind of deformation of aluminum alloy is much higher than it.

1.4 Comparison of corrosion resistance, anodic oxidation and surface decoration treatment

Compared with the aluminum alloy, brass and zinc-based alloy corrosion resistance of the larger gap, without surface treatment, the latter is very poor decoration, it is generally necessary to use other surface treatment methods such as plating or other protection or decoration.

At present, aluminum alloy plating decorative chrome technology is very mature, the cost of production and copper, zinc plating chrome plating almost.

Deformed aluminum alloy after anodized, not only has excellent corrosion resistance, but also has a good decorative. Since the anodic oxidation of aluminum alloy is lower than the chrome cost, this decorative surface has a competitive advantage, making it a good market share.

1.5 welding performance and forming process characteristics

Another feature of the deformed aluminum alloy is the ability to weld, this performance is the traditional all of the cast aluminum alloy and copper, zinc alloy can not match. But the deformation of aluminum must be required to eliminate the internal stomata, so its forming process requirements are squeeze or forging.

Typical Mechanical Properties of Typical Aluminum Alloys

Typical Mechanical Properties of Typical Aluminum Alloys

Aluminum alloy grades and state Tensile strength (25 ° C MPa) Yield strength (25 ° C MPa) Hardness 500 kg Force 10 mm Ball elongation 1.6 mm (1/16 in) Thickness

5052-H112 175 195 60 12

5083-H112 180 211 65 14

6061-T651 310 276 95 12

7050-T7451 510 455 135 10

7075-T651 572 503 150 11

2024-T351 470 325 120 20

A simple analysis of economy

Copper alloy for the proportion of three times the aluminum alloy, the unit price is 3.3 times the aluminum, the unit cost was 3.33 × 3 = 10 times. If you can use deformation of aluminum alloy instead of copper alloy, can reduce the cost of 80%, its benefits unparalleled.

And zinc specific gravity of aluminum 2 times, the current price of zinc is about 1.5 times the high cost of aluminum, the unit cost of 2 × 1.5 = 3 times. With the deformation of aluminum instead of zinc, can save nearly half of the cost.

With the deformation of aluminum alloy production of stainless steel decorative products, its production costs can be reduced by half, there is similar significance.

3. High strength deformation of aluminum alloy blank production process

As China's continuous casting and forging technology has made significant progress, the use of "extrusion die-casting die forging machine", not only can produce the same deformation of the die-casting structure of the deformation of aluminum alloy blank, the workshop cost similar to the production of forging rough, Surface finish to 7, the internal metallographic fragmentation organization, than the traditional casting method, but also has a better and higher comprehensive mechanical properties. Has been produced, including extreme sports motorcycle, scooters and other high-end decorative and impact resistance products, exports to Europe and the United States and other markets.

Therefore, the use of deformed aluminum alloy instead of the traditional cast aluminum alloy, copper alloy, zinc alloy production rough, its technical economy are completely feasible.

From the market feedback information, this has become a trend and trend.