Charge meter, low zinc bronze, zinc, the amount of compensation. 2% of zinc in brass is 0. 4 to 0.7 percent, the high zinc bronze 1.2 ~ 2.0%; aluminum 0 1 ~ 0 15%; manganese 0. 1 to 0.3%; arsenic from 0 to 0.01%; beryllium from 0 to 0.01%; tin is 0.05%. Should adhere to the low-temperature zinc in order to reduce the melting loss, high temperature and fishing with the principle of slag. The modeling of this bronze is magnificent of primitive simplicity. Melting with high melting point elements such as iron, manganese bronze, the first such element made of the master alloys, such as iron, copper – iron master alloy to join. Easily oxidized elements such as arsenic, beryllium, etc. should also be made of copper master alloy to join.
Aluminum, lead, tin, because of its melting point low can be pure metal form to join, but the molten aluminum into the copper water will release a lot of heat, and other solid material, it should melt before the copper is not installed furnace melting to prevent local overheating. Smelting bronze, the temperature control is also very important, in addition to low zinc bronze baked galvanic instrument to determine the general bronze melting temperature by observing the low-frequency core induction furnace ammeter pointer swing or melt the degree of fire-breathing to determine. Swing of the pointer is blocked melting trench due to the large number of zinc vapor evaporated from within the melt channel, circuit, resulting in discontinuous current due; flame is refers burns stove, furnace put usually flame spray phenomenon. Two ears stand on the mouth of the bronze.
Bronze due to the amount of zinc, each of the flame temperature. High zinc and bronze can be determined in accordance with fire-breathing frequency and extent of baked, baked to melt before adding a small amount of copper – phosphorus master alloy in order to increase the melt flow. Semi-continuous casting of lead bronze, baked, can be added to charge 0.04% of aluminum in order to improve the quality of ingot surface. The three bronze are cited as the “bronze treasures abroad and at home”. Iron mold cast lead bronze, you can add a small amount of rare earth elements copper – cerium or rare earth master alloys within 1 to 2 minutes ahead of the old and the new materials added to the amount of both charge 0.05%, to improve the hot rolling of the ingot properties.
Manganese bronze slag more for avoid ingot produce slag, it is timely fishing net scum. Section III, the manufacture of ferrous alloy castings commonly used non-ferrous alloys including copper, aluminum, magnesium, zinc, lead, tin, titanium and its alloys and so on. A metal or several elements of the alloy. Mainly copper and copper alloy and aluminum alloy castings application. Such as pure copper castings primarily using its high electrical conductivity, thermal conductivity; copper alloy to use its anti-corrosion and wear resistance. In the inner wall of the bronze are engraved lengthy inscriptions of 290 characters in 28 lines. In addition, the proportion of aluminum alloy is light and good electrical and thermal conductivity, good corrosion resistance can, therefore, used to manufacture castings, such as the car on the cylinder block, cylinder head and intake manifold.
A copper alloy and aluminum smelting general, non-ferrous alloy’s melting point is low and vulnerable to oxidation at high temperatures and inhale, casting pores and inclusions. This purpose commonly used as shown in Figure 5.13 crucible furnace melting. The heating of the crucible furnace coke, oil, resistance wire, and the induced current. The inscriptions carved on the chinese bronze the praise and miss of Ke to his grandfather. And melting should take appropriate degassing, Cleaner measures to improve its purity. An aluminum smelting characteristics the oxidation and inhale the liquid aluminum vulnerable to oxidation, the formation of A12O3, melting point up to 2050 ° C, its specific gravity is slightly larger than the aluminum, and it is very stable, not easily broken down, but the form of nonmetallic inclusions suspended in the liquid aluminum alloy, it is difficult to remove.