分级时效对QBe2铍青铜力学性能及微观组织的影响

刘俊伟; 刘军; 鲁世强; 袁明华; 戴木海

doi:10.15980/j.tzzz.2018.03.031

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分级时效对QBe2铍青铜力学性能及微观组织的影响
Effects of Multi-step Aging on Mechanical Properties and Microstructure of QBe2 Beryllium Bronze
2018年38卷第3期页码：345-348
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.03.031

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[1]刘俊伟,刘军,鲁世强,袁明华,戴木海.分级时效对QBe2铍青铜力学性能及微观组织的影响[J].特种铸造及有色合金,2018,38(03):345-348.

Liu Junwei, Liu Jun, Lu Shiqiang, et al. Effects of Multi-step Aging on Mechanical Properties and Microstructure of QBe2 Beryllium Bronze[J]. Special Casting & Nonferrous Alloys, 2018,38(3):345-348.
[1]刘俊伟,刘军,鲁世强,袁明华,戴木海.分级时效对QBe2铍青铜力学性能及微观组织的影响[J].特种铸造及有色合金,2018,38(03):345-348. DOI： 10.15980/j.tzzz.2018.03.031.

Liu Junwei, Liu Jun, Lu Shiqiang, et al. Effects of Multi-step Aging on Mechanical Properties and Microstructure of QBe2 Beryllium Bronze[J]. Special Casting & Nonferrous Alloys, 2018,38(3):345-348. DOI： 10.15980/j.tzzz.2018.03.031.

摘要

研究了分级时效热处理工艺对QBe2铍青铜力学性能与微观组织的影响。结果表明

硬态QBe2铍青铜分级时效最佳工艺为240℃×2h+400℃×4h

此时合金伸长率为17.7%

弹性模量为144.7GPa

抗拉强度为833MPa。铍青铜微观组织主要含α相、β相及γ相。分级时效既可以细化QBe2铍青铜中的β相

也可以控制晶间反应的数量

提高合金的综合力学性能。

Abstract

The influence of multi-step aging treatment on the mechanical properties and microstructure of QBe2 beryllium bronze alloy was analyzed.The results reveal that the optimum process of hard-state QBe2 beryllium bronze alloy is 240 ℃×2 h + 400 ℃×4 h

where the elongation

the elasticity modulus and the tensile strength of the alloy reach 17.7%

44.7 GPa and 833 MPa

respectively.The microstructure of beryllium bronze alloy is mainly composed ofαphase

βphase andγphase.The multi-step aging can refine theβphase in the microstructure of the QBe2 beryllium bronze alloy and control the number of intergranular reactions to improve the comprehensive mechanical properties of the alloy.