Gradient control method for microstructure ultrafine crystallization of deep cone copper shaped charge liner

US11519062B2 · kind B2 · utility

Assignee

• No.59 Research Institute of China Ordnance Industry · CN

Inventors

• Qiang Chen · Sollentuna, SE
• Dayu SHU · Chongqing, CN
• Qiang Zhao · Milpitas, US
• Zude Zhao · Chongqing, CN
• Luchang Che · Chongqing, CN
• Yang-Cheng Wu · Hsinchu, TW
• Chuankai Hu · Chongqing, CN
• Hui Li · Hubei, CN

Key dates

• Filing date: Mar 5, 2019
• Grant date: Dec 6, 2022
• Expiry date: Jul 22, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42B1/032
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A gradient control method for a microstructure ultrafine crystallization of a deep cone copper shaped charge liner includes the steps of an extrusion forming, a recrystallization heat treatment, and a high-frequency percussion. A multi-pass extrusion is used in the extrusion forming, and in the high-frequency percussion step, a percussion speed is 30,000 to 40,000 times/min, a percussion force is 1600 N to 2000 N, and a number of percussion times is 1 to 3. The forming and surface quality control of the deep cone shaped charge liner are realized by the control technology of the present invention; the plasticity of the material is improved, and fine crystal structures are obtained; and an ultrafine grain gradient structure distributed along the thickness direction is formed in the inner surface of the shaped charge liner.