Effects of Aging Treatment on Thermal Expansion Coefficient and Resistivity of Casted Cu-49.29Cr Alloy

Zhao Jinzhu

doi:10.15980/j.tzzz.2018.06.027

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Effects of Aging Treatment on Thermal Expansion Coefficient and Resistivity of Casted Cu-49.29Cr Alloy
Vol. 38, Issue 6, Pages: 678-680(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.06.027

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[1]赵金柱.时效处理对Cu-49.29Cr合金热膨胀系数与电阻率的影响[J].特种铸造及有色合金,2018,38(06):678-680.

Zhao Jinzhu. Effects of Aging Treatment on Thermal Expansion Coefficient and Resistivity of Casted Cu-49.29Cr Alloy. [J]. Special Casting & Nonferrous Alloys 38(6):678-680(2018)
[1]赵金柱.时效处理对Cu-49.29Cr合金热膨胀系数与电阻率的影响[J].特种铸造及有色合金,2018,38(06):678-680. DOI： 10.15980/j.tzzz.2018.06.027.

Zhao Jinzhu. Effects of Aging Treatment on Thermal Expansion Coefficient and Resistivity of Casted Cu-49.29Cr Alloy. [J]. Special Casting & Nonferrous Alloys 38(6):678-680(2018) DOI： 10.15980/j.tzzz.2018.06.027.

摘要

对Cu-49.29Cr合金进行不同温度的时效处理

采用光学显微镜、透射电镜、电阻率测试仪和膨胀仪探讨了时效处理对Cu-49.29Cr合金热膨胀系数与电阻率的影响。结果表明

时效处理能降低合金的电阻率

经550℃保温2h时效处理后

合金的电阻率出现最小值

为4.958×10

-8

Ω·m

较铸态合金减小了7.71×10

-9

Ω·m

但对热膨胀系数影响不大。

Abstract

Direct aging treatment with different temperature was carried out on as-cast Cu-49.29 Cr alloy

and effects of aging treatment on thermal expansion coefficient and resistivity of as-cast Cu-49.29 Cr alloy were analyzed by optical microscope

transmission electron microscopy

resistivity tester and dilatometer.The results show that aging treatment can decrease the resistivity of the alloy.After aging treatment at 550 ℃for 2 h

the alloy can obtain a lower resistivity of 4.958×10

-8

Ω·m

decreased by 7.71×10

-9

Ω·m compared with that of the as-cast alloy.However

the change of thermal expansion coefficient can be neglected.