2results about How to "Grain refinement is obvious" patented technology

This invention discloses a laser-shock-assisted creep aging forming method for thin-walled components with complex curvature. The method includes: simulating and obtaining difficult-to-form regions; performing laser shock on the difficult-to-form regions of a large-size aluminum alloy thin-walled component sheet; wrapping and fixing a breathable felt around the impacted component; placing the component in a sealed space formed between a vacuum bag and the mold surface; evacuating the sealed space; and then sending the mold into an autoclave for creep aging. After completion, the component springs back, yielding the target surface. This method uses a laser to impact localized areas of a large-size aluminum alloy thin-walled component, introducing dislocations while achieving pre-forming. This provides a good surface foundation for subsequent high-precision creep aging forming of the component, and is suitable for forming parts with complex curvature.

This invention belongs to the field of aluminum-copper alloy casting technology, and particularly relates to an in-situ particle-reinforced aluminum-copper alloy and its preparation method. The aluminum-copper alloy comprises the following components by weight percentage: 6.0% < Cu < 7.5%, 0.3% < Mn < 0.5%, 0.2% < Cd < 0.5%, 0.1% < Zr < 0.3%, 0.05% < Ti < 0.5%, 0 < V < 0.2%, 0.005 < B < 0.5%, 0 < Ce < 0.5%, with the balance being Al. This invention enhances the strength and plasticity of the alloy by adding a powder mixture of K2TiF6, KBF4, and CeO2 to form dispersed in-situ TiB2 particles; simultaneously, the addition of Ce disperses the TiB2 particles and other precipitated phases in the matrix, resulting in significant grain refinement and narrowing of the dendrite spacing.