| 镁合金的热裂行为测试研究 |
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| 引用本文： | 王业双,张咏波,丁文江,王渠东.镁合金的热裂行为测试研究[J].特种铸造及有色合金,2001(3):13-15. |
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| 作者姓名： | 王业双 张咏波 丁文江 王渠东 |
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| 作者单位： | 上海交通大学 |
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| 摘 要： | 以ZQS－2000型双试棒合金热裂－线收缩仪的机械部分为基础，提出了一种用以测试镁合金热裂行为的新的测试方法。铸造时采用覆膜砂作为铸型材料，解决了镁合金在浇注过程中的燃烧问题；通过A／D转换，用微机对凝固过程中的温度、应力和收缩信号数据进行采集和进一步的处理，并描绘其曲线。试验测得，在通常凝固条件下，AZ91合金并不按平衡相图凝固，而是有共晶相析出；AZ91合金最容易产生热裂的温度在实际凝固结束温度（424℃）附近。
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| 关 键 词： | 热裂行为 微机 测试 应力 凝固 镁合金 线收缩 |
| 文章编号： | 1001-2449(2001)03-0013-03 |
| 修稿时间： | 2000年10月18 |
Hot Tearing Behavior
Testing of Mg Alloy |
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| Wang Yeshuang,Zhang Yongbo,Ding Wenjiang,WANG Qudong.Hot Tearing Behavior
Testing of Mg Alloy[J].Special Casting & Nonferrous Alloys,2001(3):13-15. |
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| Authors: | Wang Yeshuang Zhang Yongbo Ding Wenjiang WANG Qudong |
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| Abstract: | Based on the mechanical parts assembly of the twin bar tester of hot tearing- linear contraction for alloy, a new way to testing hot tearing behavior of Mg alloy was developed. In the system, resin precoated sand was used as molding material to solve the combustion of Mg alloy during pouring process. The signal data of temperature, stress and shrinkage were recorded and further treated with curves drawn by computer through A/D conversion. Results indicated that AZ91 alloy would precipitate eutectic phase not coinciding with equilibrium phase diagram under the conventional solidification condition. The temperature most susceptible to be hot torn was located near the practical solidified-end temperature(420 ℃) for AZ91 alloy. |
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| Keywords: | Hot Tear Microcomputer Testing Stress Solidification Mg Alloy |
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