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How to distinguish between cast copper and wrought copper
2021-11-01
One, the process is different
1. Cast copper: Cast copper and copper sculptures are all cast by the lost wax method. Simply put, it is to melt the copper into a liquid that meets certain requirements in a high-temperature furnace, and then pour it into the mold, solidify and clean after cooling. After processing, a bronze sculpture artwork with the same shape and size as the mold is obtained.
2. Forging copper: The molten metal is firstly cast into the cavity of the mold at low or high speed. The mold has a movable cavity surface. It is forged under pressure with the cooling process of the molten metal, which eliminates the shrinkage and porosity defects of the blank. , It also makes the internal structure of the blank reach the broken grains in the forged state.
2. Different raw materials
1. Cast copper: the hollow ceramic shell is put into a sintering furnace and sintered at 1000°C-1150°C according to different metal materials. The copper liquid is immediately cast into the ceramic shell. After cooling, the outer ceramic shell is shaken and the copper is peeled off. The crude embryo body of the product.
2. Forged copper: Copper plate is the main raw material, with steel frame support inside. Some complex sculptures need to be forged with a 1:1 mold, and some simple shapes can be forged according to the free-form frame.
Three, the application direction is different
1. Cast bronze: Figure sculptures are the most common. But it is easy to oxidize, so pay more attention to maintenance.
1. Cast copper: Cast copper and copper sculptures are all cast by the lost wax method. Simply put, it is to melt the copper into a liquid that meets certain requirements in a high-temperature furnace, and then pour it into the mold, solidify and clean after cooling. After processing, a bronze sculpture artwork with the same shape and size as the mold is obtained.
2. Forging copper: The molten metal is firstly cast into the cavity of the mold at low or high speed. The mold has a movable cavity surface. It is forged under pressure with the cooling process of the molten metal, which eliminates the shrinkage and porosity defects of the blank. , It also makes the internal structure of the blank reach the broken grains in the forged state.
2. Different raw materials
1. Cast copper: the hollow ceramic shell is put into a sintering furnace and sintered at 1000°C-1150°C according to different metal materials. The copper liquid is immediately cast into the ceramic shell. After cooling, the outer ceramic shell is shaken and the copper is peeled off. The crude embryo body of the product.
2. Forged copper: Copper plate is the main raw material, with steel frame support inside. Some complex sculptures need to be forged with a 1:1 mold, and some simple shapes can be forged according to the free-form frame.
Three, the application direction is different
1. Cast bronze: Figure sculptures are the most common. But it is easy to oxidize, so pay more attention to maintenance.
2. Wrought copper: The tensile strength is nearly twice as high as that of ordinary cast alloys. For aluminum alloy automobile wheels, frame and other parts that are expected to be produced with higher-strength impact-resistant materials.
