6063 aluminum rods of low alloying Al - Mg - Si high plastic alloy. Possesses many features: 1. Strengthening heat treatment, high impact toughness, sensitive to lack of don't. 2. Has excellent thermoplastic, high-speed extrusion can be complex. Thin-walled. Hollow profiles or forging forgings into complex structures, wide range of quenching temperature, quenching sensitivity is low, after extrusion and forging mold release, as long as the temperature is higher than the quenching temperature. Can use the method of spraying or wear water quenching. Thin-walled package (6 < 3 mm) can also be a wind quenching. 3. Good weldability and corrosion resistance, no stress corrosion cracking tendency, in the heat treatment may enhance type aluminum alloy, Al - Mg - Si alloy is the only alloy found no stress corrosion cracking phenomenon. 4. After the processing surface is very bright and clean, and easy for the anodic oxidation and color. Its disadvantage is that if parked at room temperature for a period of time after quenching on ageing, for strength disadvantage effects of (park).Effects of alloying elements on the performanceIn 6063 aluminum alloy is AL - Mg - Si system with moderate heat treatment strengthening alloy, Mg and Si are the main alloy elements, optimizing chemical composition of the main work is to determine the percentage content of Mg and Si (mass fraction, the same below).1.1 Mg of the role and influence of Mg and Si strengthening phase Mg2Si, the higher the content of Mg, the more the amount of Mg2Si, heat treatment reinforcement effect is more big, the profile of the tensile strength is high, but also increase deformation resistance, alloy plastic drop, processing performance is bad, the corrosion resistance worse.1.2 the number of function and influence of Si Si should make all Mg in the alloy can exist in the form of Mg2Si phase, in order to ensure that the Mg at full play. As Si content increasing, the grain size of alloy and metal liquidity increases, casting performance is good, heat treatment reinforcement effect increased, the tensile strength of profiles plasticity is reduced, and the corrosion resistance worse.
