Effect of Cold Rolling Deformation on Aging Precipitation of Cu-Cr-Sn-Zn Alloy

Su, Juan; Jia, Shu Guo; Ren, Feng; Liu, Ping; Tian, Baohong

doi:10.4028/www.scientific.net/amr.79-82.1507

Cited by 3 publications

(2 citation statements)

References 7 publications

(7 reference statements)

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“…1. Whether the lead frame meets the requirements or not depends on the quality of bending process [7,8]. There is a balance between the strength and the bending workability, so the research of spring amount of different copper alloys is very necessary.…”

Section: Bending Process Analysis and Simulation Pretreatmentmentioning

confidence: 99%

Simulation Analysis of Springback for Lead Frame Copper Alloy

Ren

Yang

2012

AMR

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The bending performance of lead frame materials is a very important in improving the quality of lead frame alloys and meeting the needs of high performance integrated circuit. The sringback amount of curvature variation of CuFeP , CuCrZrMg , CuNiSi and CuCrSnZn alloy are researched by numerical simulation. Bending model is built by 3D modeling software, and the necessary post-processing is carried out. The bending springback amount △K of the four kinds of copper alloy materials are calculated out. The results show that the sringback amount of curvature variation of four copper alloys at the same condition from large to small in turn is CuCrZrMg, CuNiSi, CuFeP, CuCrSnZn. Smaller the minimum relatively bending radius of copper alloy used in lead frame, less the springback amount and better the forming performance.

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Section: Bending Process Analysis and Simulation Pretreatmentmentioning

confidence: 99%

Simulation Analysis of Springback for Lead Frame Copper Alloy

Ren

Yang

2012

AMR

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“…However, traditional Cu-Cr alloys have poor resistance to softening at high temperatures, which is challenging to meet the needs of industry [20][21][22]. Moreover, the conductivity and ultimate tensile strength of copper alloys were limited to around 80% IACS and 500 MPa for this significant research field [23][24][25]. Researchers are looking for an effective way to improve the strength and softening temperature with acceptable electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Effects of Zn addition on the microstructure and properties of Cu–Cr alloys

Lei

Xu³

et al. 2023

Materials Science and Technology

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Many attempts were conducted to improve Cu–Cr alloys’ softening temperature, strength, and electrical conductivity. After homogenised treatment at 900°C for 4 h, hot rolled by 80% at 900°C, solid solution treated at 940°C for 2 h, cold rolled by 50%, and aged at 450°C for 1 h, cold rolled by 50%, and aged at 450°C for 0.5 h, the tensile strength, yield strength, microhardness, and electrical conductivity of the fabricated Cu–2Cr–1Zn alloy were 616.7, 540.1 MPa, 176.7 HV, and 71.5% IACS, respectively, with a softening temperature of 530°C. Orowan precipitation strengthening was the primary strengthening mechanism. These findings bring an effective way to improve the strength and softening temperature with a small loss of electrical conductivity.

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