Microstructural Evolution of Nickel-aluminum Bronze during Heat Treatment Process

Jin Yunxue; Du Chunyan; Wang Lei

doi:10.15980/j.tzzz.2014.09.078

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Microstructural Evolution of Nickel-aluminum Bronze during Heat Treatment Process
Vol. 34, Issue 9, Pages: 1004-1008(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.09.078

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[1]金云学,都春燕,王磊.镍铝青铜组织在热处理过程中的演变规律[J].特种铸造及有色合金,2014,34(09):1004-1008.

Jin Yunxue, Du Chunyan, Wang Lei. Microstructural Evolution of Nickel-aluminum Bronze during Heat Treatment Process. [J]. Special Casting & Nonferrous Alloys 34(9):1004-1008(2014)
[1]金云学,都春燕,王磊.镍铝青铜组织在热处理过程中的演变规律[J].特种铸造及有色合金,2014,34(09):1004-1008. DOI： 10.15980/j.tzzz.2014.09.078.

Jin Yunxue, Du Chunyan, Wang Lei. Microstructural Evolution of Nickel-aluminum Bronze during Heat Treatment Process. [J]. Special Casting & Nonferrous Alloys 34(9):1004-1008(2014) DOI： 10.15980/j.tzzz.2014.09.078.

摘要

采用SEM、OM、XRD和力学性能测试

研究了镍铝青铜热处理前后的组织和性能。结果表明

镍铝青铜的铸态组织为α相和κ相

在850、900、950和1 000℃固溶2h后

合金的硬度先上升后下降

α相和κ相减少并生成马氏体型β′相。合金在900℃固溶2h后再经300、350、400、450、500、600和700℃时效后有明显的时效硬化。时效时间为1h时硬度达到峰值

500℃及以上温度时效后时效硬化现象消失。

Abstract

Microstructure and properties of nickel-aluminum bronze before and after heat treatment were investigated by using SEM

XRD and mechanical property testing.The results show that the microstructure of as

cast nickel aluminum bronze is composed ofαphase andκphase

and increasing the solution temperature from 850℃to 1 000℃for 2h

the hardness of the alloy is increased firstly and then decreased.Meanwhile

theαphase andκphase are reduced and the martensiteβ′phase is generated.Aging hardening exhibits obvious with aging temperature from 300 to 700℃after solution at 900℃for 2h

where the hardness reaches the peak with aging for 1h

and the phenomenon of aging hardening disappears with aging temperature more than 500℃.