High-performance stamping forming process of 6061 aluminum alloy with pre-hardening

Mingyang DONG, Zhili HU, Peng LIU

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Journal of Materials Engineering ›› 2025, Vol. 53 ›› Issue (4) : 15-22. DOI: 10.11868/j.issn.1001-4381.2024.000086
HIGH-PERFORMANCE FORMING MANUFACTURING TECHNOLOGY FOR TRANSPORTATION EQUIPMENT ALUMN

High-performance stamping forming process of 6061 aluminum alloy with pre-hardening

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Abstract

The 6061 aluminum alloy billets are subjected to solution quenching treatment under a solution heat treatment condition of 550 ℃ for 30 min. After quenching， the billets are artificially aged at 140 ℃ for 6 h to 18 h to obtain pre-hardening （PH） billets. The formability and mechanical properties of the pre-hardening 6061 aluminum alloy billets are evaluated using room-temperature Erichsen cupping tests and uniaxial tensile tests. Additionally， the stamping trials for hat-shaped beam components are conducted to verify the feasibility of this technique for engineering applications. The results show that the yield strength （YS） of the PH-12 h pre-hardening billets is 186 MPa higher than that of the O-temper billets， and the tensile strength （TS） is 215 MPa higher than that of the O-temper billets， while the elongation （EL） and cupping values are comparable to those of the O-temper billets. The PH-18 h pre-hardening billets exhibit a maximum tensile strength of 391 MPa after 10% deformation， significantly exceeding that of the T6-temper aluminum alloy， demonstrating that the pre-hardening billets possess excellent strength-ductility balance. Furthermore， the hat-shaped beam components formed from pre-hardening billets exhibit tensile and yield strengths superior to those of the T6-temper aluminum alloy.

Key words

6061 aluminum alloy / cold stamping / pre-hardening / mechanical property / formability

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Mingyang DONG , Zhili HU , Peng LIU. High-performance stamping forming process of 6061 aluminum alloy with pre-hardening. Journal of Materials Engineering. 2025, 53(4): 15-22 https://doi.org/10.11868/j.issn.1001-4381.2024.000086

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