Mechanical properties of Cu-4.0wt%Ni-0.95wt%Si alloys with and without P and Cr addition

被引：27

作者：

Watanabe, Chihiro ^{[1
]}

Nishijima, Fumiya ^{[1
]}

Monzen, Ryoichi ^{[1
]}

Tazaki, Kazue ^{[2
]}

机构：

[1] Kanazawa Univ, Div Innovat Sci & Technol, Kanazawa, Ishikawa 9201192, Japan

[2] Kanazawa Univ, Div Environm Sci & Engn, Kanazawa, Ishikawa 9201192, Japan

来源：

PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷

关键词：

Cu-Ni-Si alloy; age-hardening; delta-Ni2Si precipitate; P addition; Cr addition; mechanical properties;

D O I：

10.4028/www.scientific.net/MSF.561-565.2321

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of P and Cr addition and two-step aging on the microstructure and mechanical properties of a Cu-4wt%Ni-0.95wt%Si alloy have been examined. The addition of 0.02wt%P improves both strength and elongation because it suppresses discontinuous precipitation reaction. The Cr addition to the Cu-Ni-Si-P alloy decreases greatly the grain size, resulting in an increase in elongation. Two-step aging, pre-aging at 300 or 350 degrees C and subsequent second-step aging at 450 degrees C, causes an increase in strength without reducing elongation. The increase in strength is attributable to the decrease in inter-precipitate spacing by the two-step aging. The two-step aged Cu-4wt%Ni-0.95wt%Si-0.02wt%P-0.02wt%Cr alloy attains a tensile strength of 830MPa, an elongation of 13% and an electrical conductivity of 35%IACS.

引用

页码：2321 / +

页数：2

共 9 条

[1]

LI JCM, 1963, T METALL SOC AIME, V227, P239

[2] PRECIPITATE STRUCTURE IN A CU-NI-SI ALLOY [J].