Melting temperature control melting temperature is too low, is not conducive to the dissolution of alloying elements and the gas discharge inclusions increase the formation of segregation, cold shut, due to the tendency of the cast, the engine, but also due to lack of heat risers, the casting not reasonable feeding, there is data indicate that all aluminum melting temperature of at least 705 degrees and should be stirred. Melting temperature is too high not only a waste of energy, the more serious because the higher the temperature, the more hydrogen absorption, the more coarse grains also, alumina more serious, some of the burning of alloying elements are more serious, leading to the mechanical properties of the alloy The decline, casting and machining performance deterioration, weakening the effect of modification treatment, casting tightness is reduced. Practice has proved that the alloy was rapidly heated to a higher temperature, turboshaft engine, a reasonable stirring to dissolve all alloying elements promote (especially refractory metal element), Grilled except scum fell after pouring temperature, Recycling engine computer board, so that the minimum degree of segregation, but also less fusion of hydrogen is beneficial to obtain uniform and compact, high mechanical properties of the alloy. because the temperature of molten aluminum is difficult to judge with the naked eye, so no matter what type of melting furnace, should be used to control the temperature Thermometer. Thermometer should regularly check and repair. Thermowell should cycle with a metal brush clean, coated with a protective coating, diesel engine, in order to ensure the accuracy of the temperature measurement results and the Registrar life. Aluminum and aluminum alloys can be used a variety of methods smelting. Often using a coreless induction furnace and trough induction furnace, crucible furnace and open hearth furnace reflective (use natural gas or fuel oil combustion) and resistance furnaces and electric radiant. Charge a wide range, from high-quality pre-alloyed ingot until special charge constituted by the low-level waste can be used. However, even under the most appropriate conditions for smelting cast, molten aluminum is also susceptible to the adverse effects of three types: · at high temperatures, over time, leads to the adsorption of hydrogen increases the hydrogen dissolved in the melt. ? In high temperature conditions, as time goes on to ask, melt oxidation. · Loss of alloying elements. Rotary engine, engine, Shengxin recycling scrap metal recycling scrap metal from the Linyi City Shengxin Limited. Linyi City Shengxin scrap metal recycling Ltd. (shengxin.tz1288.com) strong, credible, in Linyi, Shandong scrap metal industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengxin scrap metal recycling into the brilliant and you work for a better future!