ã€ALUMINIUM NETWORK】The quenching of aluminum alloys is suddenly quenched from high temperature to quenching. For example, steel blades must be hardened and sharpened in water. The quenching of aluminum materials is both water-cooled and quenched. The 6063 aluminum profiles used in construction are quenched by air-cooling, and the quenched aluminum profiles are aged for a certain period of time in the aging furnace. The internal crystals of the aluminum profiles are rearranged and the mechanical strength is significantly improved. Of all the metals in the alloy, only the aluminum alloy has a time-effect state.
Aluminum alloy extrusion molding temperature of 460 ~ 500 degrees, the general requirements after the quenching temperature of 200. Through high-temperature extrusion molding, the state of artificial aging after quench heat treatment (quenching) is air-cooled (T5); it is cooled by high-temperature extrusion molding process, and then the artificial aging state is water cooling (T6).
T5 is air-cooled after extrusion, T6 is water-cooled after extrusion, and the hardness increases after quenching with water. But if aluminum needs to be bent, try not to T6.
Some people think that the difference between T5 and T6 is only the difference in cooling speed, not the difference between air-cooled and water-cooled. The cooling rate of air cooling is large enough to achieve the effect of T6. Conversely, water cooling, but the cooling rate is not big enough, it can only be T5. Effect.
In fact, the T6 state can be either quenched online (water-cooled or forced-air cooling) or off-line quenched (quenched with a quenching furnace), but according to customer requirements and product specifications. In actual production, no matter which production process is adopted, the key is to achieve the mechanical strength requirements of the aluminum product.
Hardness is related to the speed of air cooling and the speed of water cooling. The better the cooling effect, the better the hardness will be after aging, why there will be T5 and T6, because the size of T5 air-cooled products will not be deformed, almost all the profiles like doors and windows will choose T5, and T6 material is relatively thin water-cooled The profile will deform when it encounters water. Specially, it is easy for something with an opening to deform when it encounters water. Of course, it is also possible to use water in the form of floating water, which is the kind of spray water. After the product is over water, the effect will be much better than the air-cooling effect. 6063-T5 is between 10-13 and 6063-T6 can reach 13 or more.
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