Al-Cu-Mn合金形变时效硬化和热稳定性的研究

来源期刊：中南大学学报(自然科学版)1987年第6期

论文作者：张纬斌 崔祺 刘武

文章页码：635 - 641

关键词：铝合金； 铜合金； 锰添加合金； 镁添加合金； 冷形变； 人工时效； 加工硬化； 沉淀硬化； 热稳定性； 显微组织(金相学)；Al-Cu-Mn合金；形变热处理

Key words：aluminium alloys； copper alloys； manganese additions； magnesium alloy additions； cold deformation； artificial ageing； work hardening； precipitation hardening； thermal stability； micro-struture (metallography)；Al-Cu-Mn alloys；thermo-mechanical treatment

摘    要：本文研究了Al-Cu-Mn合金淬火—冷形变—人工时效—退火后,室温硬度(HRF)随冷形变度(ε％)、退火温度(t,℃)和退火时间(τ,h)而变化的规律.得出了HRF-f(ε,t,τ)关系的回归方理.用τ为1h的HRF-f(ε,t)曲线和t为200℃的HRF-f(ε,τ)曲线,说明了合金形变时效硬化效果和热稳定性.通过金相分析与TEM研究,阐明了形变时效硬化和热稳定化的机理.

Abstract: In this paper, we studied how the hardness of Al-Cu-Mn alloy at room temperature varies with the cold-rolling degree(ε%), annealing tamperature(t℃) and time(τ,h). Thus a regression equation relating to HRF-f(ε,t,τ) correlation was worked out. The strain-age-hardening effectiveness and thermo-stability were illustrated by HRF-f(ε,t) (when τ=1h) and HRF-f(ε,τ) (when t=200℃) curves. The mechanism of strain-age-hardening and thermo-stabilization was demonstrated through optical and electron-micrographic analyses.