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自从德国人威尔蒙于1960年发现铝合金沉淀时效硬化现象以来,弥散强化作为铝合金的一种主要强化手段广泛应用于工业生产中。与此同时,人们对铝合金的时效机理也进行了大量的研究工作。研究方法通常有电阻法、硬度法、热分析法以及与之相配合的组织结构分析法。最近我们使用北京光学仪器厂的LCP-1型差热膨胀仪对Al-4.4Cu-1.26Mg-0.6Mn合金的时效过程进行了研究。实践表明,热分析法是研究铝合金时效过程的有效方法。它能够确定G.P区和亚稳
Since the German Wilmon found the phenomenon of precipitation hardening of aluminum alloy in 1960, dispersion strengthening has been widely used in industrial production as a main strengthening method of aluminum alloy. At the same time, a great deal of research work has been done on the aging mechanism of aluminum alloy. Research methods are usually resistance method, hardness method, thermal analysis method and the organization structure analysis. Recently, we used the LCP-1 differential thermal expansion instrument from Beijing Optical Instrument Factory to study the aging process of Al-4.4Cu-1.26Mg-0.6Mn alloy. Practice shows that the thermal analysis method is an effective method to study the aging process of aluminum alloys. It is capable of determining the G.P region and metastability