Effects of Aging Processes on the Mechanical Properties and Microstructure of Roll Casting Cu-Be Alloy

Zhou Yanjun; Chen Wei; Li Lihong; Kong Lingbao; Song Kexing; Liu Haitao; Guo Xiuhua

doi:10.15980/j.tzzz.2021.12.013

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Effects of Aging Processes on the Mechanical Properties and Microstructure of Roll Casting Cu-Be Alloy
Vol. 41, Issue 12, Pages: 1514-1517(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.12.013

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Zhou Yanjun, Chen Wei, Li Lihong, et al. Effects of Aging Processes on the Mechanical Properties and Microstructure of Roll Casting Cu-Be Alloy. [J]. Special Casting & Nonferrous Alloys 41(12):1514-1517(2021)
DOI：

Zhou Yanjun, Chen Wei, Li Lihong, et al. Effects of Aging Processes on the Mechanical Properties and Microstructure of Roll Casting Cu-Be Alloy. [J]. Special Casting & Nonferrous Alloys 41(12):1514-1517(2021) DOI： 10.15980/j.tzzz.2021.12.013.

摘要

对制备的Cu-0.33Be合金进行固溶(960℃×60 min)和不同时效工艺热处理

对比研究了锻态和时效过程中Cu-0.33Be合金的硬度、抗拉强度和拉伸断口形貌的变化。结果表明

时效处理可以显著改善Cu-0.33Be合金的硬度和抗拉强度

460℃时效60 min后

抗拉强度达到峰值661.6 MPa

此时硬度(HB)为207;时效60 min时晶粒最小

时效时间进一步延长

晶粒长大;微观断口形貌在锻态时为韧性断裂

随着时效时间延长

韧性断裂逐渐向脆性断裂转变

峰时效后为典型的脆性颗粒间断裂。

Abstract

The Cu-0.33 Be alloy was treated by solid solution at 960 ℃ for 60 min and different aging processes.The changing law of hardness

tensile strength and tensile fracture morphology of Cu-0.33 Be alloy under forging condition and during aging process were investigated.The results indicate that aging treatment can significantly enhance the tensile strength and hardness of Cu-0.33 Be alloy

which reach up to 661.6 MPa and 207（HB）

respectively

after aging at 460 ℃ for 60 min.The grain is fine with aging for 60 min

which grows as the aging time increases. The fracture morphology is characterized by ductile fracture in forging state

which is gradually converted to brittle fracture with the extension of aging time. After peak aging

the fracture is typical brittle intergranular fracture.