第38卷第4期 2017年8月
·工艺研究·
热处理技术与装备
RECHULIJISHUYUZHUANGBEI
深冷处理对Cu-1.34Ni-1.02Co-0.61Si合金
带材组织性能的影响
李小龙12，余玖明1,2,3，杨子萱12周海涛1,2
Vol.38,No.4 Aug,2017
（1.中南大学材料科学与工程学院，湖南长沙410083；2.中南大学有色金属材料科学与工程教育部
重点实验室，湖南长沙410083；3.江西省科学院应用物理研究所，江西南昌330029）
摘要：本文以时效态Cu-1.34Ni-1.02Co-0.61Si合金带材为研究对象，利用深冷处理、拉伸试验、 SEM、TEM、显微硬度和导电率的测量等方法，研究了不同深冷处理保温时间对合金带材组织和性能的影响规律。经研究发现：深冷处理能一定程度地细化合金带材的晶粒度，并减少缺陷数量，使得组织结构更加均匀，同时致密度逐渐提高。另外，深冷处理能促进合金带材进一步析出细小的第二相，提高合金带材的力学性能和导电性能。相比于未经深冷处理的合金带材，深冷处理保温48h后合金带材的显微硬度、抗拉强度、导电率分别提高了约3.13%、2.93%、4.38%，达到264HV、879MPa、 48.81%IACS。
关键词：Cu-1.34Ni-1.02Co-0.61Si带材；深冷处理；组织；力学性能；导电性能中图分类号：TG156.91文献标志码：A
文章编号：16734971(2017)04-0008-05
EffectofCryogenicTreatmentontheMicrostructureand
Properties of Cu-Ni-Co-Si Alloy Strip
LI Xiao-long"-2,YU Jiu-mingl-2.3,YANG Zi-xuan'-2,ZHOU Hai-tao'-2
(1. School of Material Science and Engineering,Central South University,Changsha Hunan 410083,China; 2. Educational Key Laboratory of Non-Ferrous Metal Materials Science and Engineering, Central South University
Changsha Hunan 410083, China;3.Institute of Applied Physics,Jiangxi
Academy of Sciences,Nanchang Jiangxi330029,China)
Abstract: In this paper, the effect of different cryogenic treatment time on the microstructure and proper-ties of alloy strip for the aging state Cu-1. 34Ni-1. 02Co-0. 61Si alloy strip was studied by methods of cryo genic treatment, tensile test, SEM, TEM, measurement of micro-hardness and electrical conductivity. It is found that the grain size can be suitably refined and number of defects could be reduced by the cryogenic treatment, which make the structure of alloy strip more uniform and the density of alloy strip increase grad-ually. In addition, the cryogenic treatment can promote further the precipitation of tiny second phase so as to enhance the mechanical properties and electrical conductivity of the alloy strip. Compared to the alloy strip without deep cryogenic treatment, the Vickers hardness, tensile strength and electrical conductivity of alloy strip after cryogenic treatment for 48 h are increased by about 3.13% , 2.93% and 4.38% , respec-
tively and achieved about 264 HV, 879 MPa,48.81% IACS. 收稿日期：2017-04-11
作者简介：李小龙（1990.10-），男，硕士研究生，主要从事有色金属材料的研制与加工。
联系电话：15580876900；E-mail：lixlcsu@163.com
基金项目：潮南省科技计划2015CK2068县域经济项目。万方数据