Eight elements of metal that affect aluminum alloy cables

1. The effect of copper: copper is an important alloying element, there is a certain solid solution strengthening effect, in addition to aging precipitation of CuAl2 has a significant aging strengthening effect. Aluminum plate in the copper content is usually 2.5% -5%, copper content in 4% ~ 6.8% when the strengthening effect is better, so most of the hard aluminum alloy copper content in this range. 2. the influence of silicon elements: Al-Mg2Si alloy alloy system alloy equilibrium phase diagram of the aluminum-rich sector Mg2Si in the aluminum in the greater solubility of 1.85%, and deceleration with the reduction of the temperature is small, the deformation of the aluminum alloy, silicon alone added to the aluminum alloy. Aluminum plate is limited to welding materials, silicon added to aluminum also has a certain strengthening effect. 3. the effect of magnesium: magnesium on the strengthening of aluminum is significant, every 1% increase in magnesium, tensile strength about to rise Junyuan 34MPa. if you add 1% of manganese, may add the strengthening effect. Therefore, adding manganese can reduce the magnesium content, and at the same time can reduce the tendency of hot cracking, in addition, manganese can also make the average precipitation of Mg5Al8 compounds, improve the corrosion resistance and welding performance.4. The effect of manganese elements: manganese in solid solution with a greater solubility of 1.82%. Alloy strength with the solubility increases continuously, manganese content of 0.8%, the elongation reaches a greater value. Al-Mn alloy long and short time-hardening alloy, that is, can not be heat-treated to strengthen. 5. zinc element effect: Al-Zn alloy system equilibrium phase diagram of the aluminum-rich sector 275 when the zinc in the aluminum solubility of 31.6%, while at 125 its solubility is reduced to 5.6%. Zinc alone added to aluminum, in the deformation premise of the aluminum alloy strength of the progress is very limited, while there is stress erosion cracking, tendency, thus limiting its application.6. The influence of iron and silicon: iron in the Al-Cu-Mg-Ni-Fe system of forging aluminum alloys, silicon in the Al-Mg-Si system of forging aluminum and in the Al-Si system of welding electrodes and aluminum-silicon forging alloys, are added as alloying elements in the base it In aluminum alloys, silicon and iron are common impurity elements that have a significant effect on alloy function. They are mainly present as FeCl3 and free silicon.7. Influence of titanium and boron: Titanium is a common added element in aluminum alloys, added in the form of Al-Ti or Al-Ti-B intermediate alloys. Titanium and aluminum to form TiAl2 phase, become a non-spontaneous core during crystallization, play a role in refining the forging organization and weld organization. Al-Ti alloy to produce package reaction, the critical content of titanium is about 0.15%, if there is boron is slowed down to as small as 0.01%. 8. Chromium and strontium effects: chromium in the formation of aluminum plate (CrFe) Al7 and (CrMn) Al12 and other intermetallic compounds, hindering recrystallization of nucleation and formation of silicon. Impede the recrystallization of the nucleation and growth process, the alloy has a certain role in strengthening, but also to improve the alloy toughness and reduce stress erosion cracking sensitivity.

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