How to Produce 6111 6061 Automotive Aluminum Sheet

Different countries have different emphasis on aluminum alloys for automobiles. The Japanese automobile industry uses more 5xxx series alloys. The United States mostly uses 2xxx series alloys, while Europe is more interested in 6xxx series alloys. The ABS alloys that China focuses on developing are 6016, 6022, 6061 and 6111 aluminum.

It is difficult to stably produce ABS panel in batches and the technical threshold is high. It is a complex system project. The process parameters of each process should be strictly controlled in order to produce ABS with just the right combination of various properties.

In terms of the main processes, the upstream process of ABS is equivalent to the process of producing other bulk high-precision aluminum plates like smelting, casting, hot rolling, and cold rolling. In fact, the specific process parameters are different.

First of all, the alloy composition should be carefully designed, internal standards should be formulated, and the ingredients should be batched according to the internal standards to ensure that the ingot composition meets the requirements of the internal standards. The melting temperature should not be too high. It is best to control it within the limit specified in the regulations.

The charge and flux must comply with regulatory requirements and must be carefully refined, degassed, and slag removed. The amount of grain refiner added before casting should be appropriate.

During casting, a stable melt flow should be maintained, and the liquid level height, casting speed, cooling water temperature, pressure, and flow rate should be well controlled to cast an ingot with a dense and uniform dendrite grid and fine and consistent grains. The process of smelting and casting is very important. Only with high-quality ingots can high-quality aluminum sheet be rolled. Production practice shows that about 70% of defects in plate production are more or less related to smelting and casting.

Only a good structure of the hot-rolled aluminum blanks can ensure that the cold-rolled aluminum sheet has a precise and delicate crystal structure, and can ensure that ABS has good formability and flanging plasticity, achieving the best match of strength and plasticity. Homogenization annealing of the ingot is also a key process. The temperature should be higher and the holding time should be longer. It is necessary to ensure that the intra-granular deviation is completely eliminated and all the solid-soluble phases are dissolved. The cooling rate must also be appropriately controlled.

The initial rolling temperature is around 500°C, and that of 7xxx series alloy is around 475°C. The reduction rate in the first and second passes should be small, the reduction rate in the middle passes should be larger, and the final pass should be in the middle. The total reduction rate must be greater than 75 %. The casting organization must be completely eliminated. The final rolling temperature is 350℃±10℃.

Haomei Aluminum has the main 6xxx aluminum alloys like 6016 plate. Welcome to leave message below to inquire what you need.