| 2A14合金的连续冷却转变动力学曲线及其应用 |
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| 引用本文： | 李红英,赵延阔,唐宜,王晓峰,邓云喆.2A14合金的连续冷却转变动力学曲线及其应用[J].中国有色金属学报,2011,21(5). |
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| 作者姓名： | 李红英 赵延阔 唐宜 王晓峰 邓云喆 |
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| 作者单位： | 1. 中南大学材料科学与工程学院,长沙,410083
2. 三一重工股份有限公司泵送研究院,长沙,410100 |
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| 摘 要： | 测定2A14合金连续冷却转变动力学曲线(CCT图),并对该曲线进行应用研究.通过DSC分析和SEM组织观察确定2A14合金合理的固溶温度,采用动态电阻法测得固溶后合金连续冷却过程的电阻-温度曲线,根据曲线斜率变化判断相变信息,绘制2A14合金的CCT图,利用透射电镜(TEM)观察连续冷却过程中合金的组织转变.结果表明:2A14合金适宜的固溶温度为505℃;随着冷却速度的增加,相变开始温度先降低,在达到某冷却速度时骤升,然后持续增加;相变主要集中在140～380℃的温度区间发生,抑制相变发生的临界冷却速度稍大于3.8.5℃/s;在实验范围内,20 mm厚的2A14合金板适宜采用60℃或100℃水淬,参考所测CCT图制定分级淬火工艺,可以在最大限度减小淬火应力的同时,抑制第二相的析出.
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| 关 键 词： | 2A14合金 连续冷却转变动力学曲线(CCT图) 原位电阻 相变 冷却速度 |
Continuous cooling transformation curve for 2A14 aluminum alloy and its application |
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| LI Hong-ying,HAO Yan-kuo,TANG Yi,WANG Xiao-feng,DENG Yun-zhe.Continuous cooling transformation curve for 2A14 aluminum alloy and its application[J].The Chinese Journal of Nonferrous Metals,2011,21(5). |
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| Authors: | LI Hong-ying HAO Yan-kuo TANG Yi WANG Xiao-feng DENG Yun-zhe |
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| Affiliation: | LI Hong-ying1,ZHAO Yan-kuo1,TANG Yi2,WANG Xiao-feng1,DENG Yun-zhe1(1.School of Materials Science and Engineering,Central South University,Changsha 410083,China,2.Institute of Pumping,SANY Heavy Industry Co.,Ltd.,Changsha 410100,China) |
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| Abstract: | The continuous cooling transformation(CCT) curve of 2A14 aluminum alloy and its application were studied.The solutionizing temperature was ascertained by DSC analysis and SEM observation.Electrical resistance-temperature curves of 2A14 alloy in the continuous cooling processes after solid solution treatment were obtained by in-situ resistance measurement.Messages of the phase transformation were judged by analyzing the slope change of the obtained curves.The CCT diagram for Al-Cu-Mg alloy was plotted.The mi... |
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| Keywords: | 2A14 alloy continuous cooling transformation(CCT) curve in-situ electrical resistance phase transformation cooling rate |
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