Aluminum Alloy Smelting Temperature Control

[China Aluminum Industry Net] The smelting temperature is too low, not conducive to the dissolution of alloying elements and the discharge of gases and inclusions, increasing the tendency to form segregation, cold septa, and undercasting, and also due to lack of heat in the riser, the castings will not be obtained. Reasonable feeding, there is information that all aluminum alloy melting temperature of at least 705 degrees and should be stirred. Excessive smelting temperature is not only a waste of energy, but is more serious because the higher the temperature, the more hydrogen is absorbed, the coarser the crystal grains are, the more severe the oxidation of aluminum is, and the more serious the burning of some alloying elements, resulting in the mechanical properties of the alloy. With the decline, the casting performance and mechanical processing performance deteriorated, the effect of the deterioration treatment was weakened, and the hermeticity of the casting was reduced.

The production practice has proved that the molten metal is quickly heated to a relatively high temperature, and reasonable stirring is performed to promote the dissolution of all alloying elements (especially refractory metal elements), and after removing the dross, the molten metal is dropped to the casting temperature. Thus, the degree of segregation is relatively high. Small, melted hydrogen is also small, is conducive to obtain uniform dense, high mechanical properties of the alloy. Because the aluminum melt temperature is difficult to judge with the naked eye, so no matter what type of melting furnace, you should use the temperature meter temperature control. Thermometers should be regularly checked and repaired. The thermowell should be cleaned periodically with a metal brush and coated with a protective coating to ensure the accuracy of temperature measurement results and the service life of the director.

Steel Tape Measure

A steel tape measure is necessary at home. For DIY fanciers, it can tell you how much the material you will need. For constructors, it helps to calculate the space.