A method for ultra-low temperature forming of aluminum alloy thin-walled components

Abstract

The invention belongs to the technical field of nonferrous metal material plastic forming, in particular to an ultralow-temperature formation method of an aluminum alloy thin-walled component. According to the ultralow-temperature formation method of the aluminum alloy thin-walled component, with an aluminum alloy annealed plate is used as a raw material, the aluminum alloy plate is cooled to 190+ / -10 DEG C with a coolant, after performing, solid solution treatment and quenching treatment are conducted, the preformed aluminum alloy component is cooled to 190+ / -10 DEG C again, and the aluminumalloy thin-walled component is finally formed. The ultralow-temperature formation method of the aluminum alloy thin-walled component can expand a formation control window of the aluminum alloy thin-walled component, lowers the risk that the inner portion of the component material is damaged, so that microcracks are formed, and is beneficial to achievement of the formation precision of the complicated thin-walled component and performance improvement of the component.

Description

technical field [0001] The invention belongs to the technical field of plastic forming of non-ferrous metal materials, and in particular relates to an ultra-low temperature forming method of an aluminum alloy thin-walled component. Background technique [0002] Aluminum alloys are widely used in lightweight structures of aerospace vehicles and transportation vehicles because of their advantages in specific strength and specific stiffness. For example, the thin-walled structure of an aircraft accounts for more than 50% of the weight of the whole aircraft structure, which needs to bear complex loads and meet the service performance requirements of high reliability and long life. At present, aluminum alloy thin-walled components mostly adopt room temperature forming manufacturing methods such as stretch forming, roll forming, and numerical control machining. However, due to the low room temperature plasticity of aluminum alloys, thermal forming is required for components with c...

AI Technical Summary

Problems solved by technology

However, since the development of aluminum alloys, the performance has been improved by adding alloy elements to form a variety of micro-nano phases, but at the same time it has also increased the complexity of microstructure evolution and genetic laws, and increased the sensitivity to the process conditions of the forming manufacturing process. , can easily lead to weakening of the final component performance

For example, aluminum-lithium alloys are prone to cracking, poor dimensional accuracy and difficult deformation control in the traditional forming and manufacturing process. After thermal processing and heat treatment, they are easy to corrode and form pitting, etc.

As another example, the elongation of aluminum alloy can be increased by more than 10 times by using superplastic forming method, but the aluminum alloy material softens during superplastic forming and a significant local necking occurs, which leads to a serious thinning of the local wall thickness of the component

These difficulties largely limit the application range of high-performance aluminum alloys, and also make it difficult for current forming manufacturing methods to meet the high-performance and high-precision forming requirements of complex thin-walled structural parts of aluminum alloys.

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