ã€ALUMINIUM NETWORK】Time-effect factors of aluminum alloy aging furnaces, including the effect of aging temperature, the influence of residence time from quenching to artificial aging, the influence of alloy chemical composition and the alloy solution treatment process. Effect of aging temperature When aging at different temperatures, the critical crystal nuclei of precipitated phases have different size, quantity, composition and rate of aggregation and growth. If the temperature is too low, due to difficulty in diffusion, the G.P. region is not easy to form, and the strength and hardness after aging are low. When the temperature is too high, the diffusion is easy to proceed, and the critical nucleus size of the precipitated phase in the supersaturated solid solution is large, and the strength and hardness after aging are low, that is, the over-ageing occurs. Therefore, various alloys have a suitable aging temperature. 1. Influence of residence time from quenching to artificial aging: Studies have found that some aluminum alloys, such as Al-Mg-Si alloys, stay artificially at room temperature before aging. The strength index of the alloy does not reach a large value, while the plasticity increases. Such as ZL101 casting aluminum alloy, after quenching at room temperature for a day and then artificial aging, the strength limit is lower than the quenching immediately after the aging of 10 ~ 20Mpa, but the plasticity than the aging of the aluminum alloy has been improved. 2, the influence of alloy chemical composition: Whether an alloy can be strengthened by ageing depends, first, on whether the elements that make up the alloy dissolve in the solid solution and the extent to which the solid solubility varies with temperature. For example, the solid solubility of silicon and manganese in aluminum is relatively small and varies little with temperature. However, although magnesium and zinc have a greater solid solubility in aluminum-based solid solutions, the structure and matrix of compounds formed with aluminum are similar. Little difference, little effect of strengthening. Therefore, binary aluminum-silicon, aluminum-manganese, aluminum-magnesium, and aluminum-zinc are usually not subjected to the aging strengthening treatment. And some binary alloys, such as aluminum-copper alloys, and ternary alloys or multiple alloys, such as aluminum-magnesium-silicon, aluminum-copper-magnesium-silicon alloys, etc., which have solubility and solid-state phase transition in the heat treatment process, then It can be strengthened by heat treatment. 3, the alloy solution treatment process influence: In order to obtain a good aging strengthening effect, under the condition of no overheating, overheating and grain growth, the quenching heating temperature is higher and the holding time is longer, which is favorable for obtaining a uniform solid solution with a large supersaturation degree. In addition, the second phase does not precipitate during the quenching process. Otherwise, during the subsequent aging treatment, the precipitated phase will act as a nucleus, causing local non-uniform precipitation and reducing the aging strengthening effect. Corner Tub is designed to make your small bathroom looked deluxe. If you only have a small bathroom, but you still want to take a shower and bath, then you can decide to put a corner tub with shower screen on it. There are so many shapes, also include European code and standard tubs --- L shaped and P shaped tubs. Using corner tub to enjoy your bathe time even it is a small bathroom. Corner Tubs Big Soaking Tub,Corner Bath,Freestanding Corner Tub,Corner Tub Ningbo Waltmal Sanitary Wares Co., Ltd. ,