Aging precipitation characteristics of lead frame Cu-Cr-Zr-Mg alloy

Qi Ming Dong; Juan Hua Su; Ping Liu; He Jun Li; Bu Xi Kang

Aging precipitation characteristics of lead frame Cu-Cr-Zr-Mg alloy

Qi Ming Dong
, Juan Hua Su
, Ping Liu
, He Jun Li
, Bu Xi Kang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

This paper presents the effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy. Optimal conditions for good hardening and electrical conductivity can be obtained by solution treating at 920°C for 1 h and aging at 470°C for 4h and at 550°C for 1 h. The hardness and electrical conductivity can reach 108 HV, 73%IACS and 106 HV, 76%IACS, respectively. Aging precipitation was dealt with by transmission electronic microscope (TEM). At 470°C aging for 4h the fine precipitation of an ordered compound CrCu₂(Zr,Mg) is found in matrix as well as fine Cr and Cu₄Zr. Aging at 550°C for 1 h some precipitates are still coherent with matrix. The CrCu₂(Zr,Mg) completely dissolves into Cr and Cu₄Zr.

Original language	English
Pages (from-to)	157-160
Number of pages	4
Journal	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
Volume	25
Issue number	5
State	Published - Oct 2004

Keywords

Aging
Cu-Cr-Zr-Mg alloy
Electrical conductivity
Hardness
Precipitation phase

Cite this

@article{86ba2e53415a45138ef192f85c330605,

title = "Aging precipitation characteristics of lead frame Cu-Cr-Zr-Mg alloy",

abstract = "This paper presents the effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy. Optimal conditions for good hardening and electrical conductivity can be obtained by solution treating at 920°C for 1 h and aging at 470°C for 4h and at 550°C for 1 h. The hardness and electrical conductivity can reach 108 HV, 73\%IACS and 106 HV, 76\%IACS, respectively. Aging precipitation was dealt with by transmission electronic microscope (TEM). At 470°C aging for 4h the fine precipitation of an ordered compound CrCu2(Zr,Mg) is found in matrix as well as fine Cr and Cu4Zr. Aging at 550°C for 1 h some precipitates are still coherent with matrix. The CrCu2(Zr,Mg) completely dissolves into Cr and Cu4Zr.",

keywords = "Aging, Cu-Cr-Zr-Mg alloy, Electrical conductivity, Hardness, Precipitation phase",

author = "Dong, \{Qi Ming\} and Su, \{Juan Hua\} and Ping Liu and Li, \{He Jun\} and Kang, \{Bu Xi\}",

year = "2004",

month = oct,

language = "英语",

volume = "25",

pages = "157--160",

journal = "Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment",

issn = "1009-6264",

publisher = "Chinese Mechanical Engineering Society",

number = "5",

}

TY - JOUR

T1 - Aging precipitation characteristics of lead frame Cu-Cr-Zr-Mg alloy

AU - Dong, Qi Ming

AU - Su, Juan Hua

AU - Liu, Ping

AU - Li, He Jun

AU - Kang, Bu Xi

PY - 2004/10

Y1 - 2004/10

N2 - This paper presents the effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy. Optimal conditions for good hardening and electrical conductivity can be obtained by solution treating at 920°C for 1 h and aging at 470°C for 4h and at 550°C for 1 h. The hardness and electrical conductivity can reach 108 HV, 73%IACS and 106 HV, 76%IACS, respectively. Aging precipitation was dealt with by transmission electronic microscope (TEM). At 470°C aging for 4h the fine precipitation of an ordered compound CrCu2(Zr,Mg) is found in matrix as well as fine Cr and Cu4Zr. Aging at 550°C for 1 h some precipitates are still coherent with matrix. The CrCu2(Zr,Mg) completely dissolves into Cr and Cu4Zr.

AB - This paper presents the effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy. Optimal conditions for good hardening and electrical conductivity can be obtained by solution treating at 920°C for 1 h and aging at 470°C for 4h and at 550°C for 1 h. The hardness and electrical conductivity can reach 108 HV, 73%IACS and 106 HV, 76%IACS, respectively. Aging precipitation was dealt with by transmission electronic microscope (TEM). At 470°C aging for 4h the fine precipitation of an ordered compound CrCu2(Zr,Mg) is found in matrix as well as fine Cr and Cu4Zr. Aging at 550°C for 1 h some precipitates are still coherent with matrix. The CrCu2(Zr,Mg) completely dissolves into Cr and Cu4Zr.

KW - Aging

KW - Cu-Cr-Zr-Mg alloy

KW - Electrical conductivity

KW - Hardness

KW - Precipitation phase

UR - https://www.scopus.com/pages/publications/12444281064

M3 - 文章

AN - SCOPUS:12444281064

SN - 1009-6264

VL - 25

SP - 157

EP - 160

JO - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

JF - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

IS - 5

ER -

Aging precipitation characteristics of lead frame Cu-Cr-Zr-Mg alloy

Abstract

Keywords

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