Effects of Mechanical Vibration and Pouring Temperature on Solidified Structure of Superalloy K4169
Effects of Mechanical Vibration and Pouring Temperature on Solidified Structure of Superalloy K4169
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DOI：
10.4028/www.scientific.net/amr.842.332
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发表时间：
2013-11
期刊：
影响因子：
--
通讯作者：
X. Xie;L. Chen;C. Xiao;Xin Tang
中科院分区：
文献类型：
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作者：
X. Xie;L. Chen;C. Xiao;Xin Tang
研究了机械振动作用下不同振幅和浇注温度对K4169高温合金凝固组织的影响。使用的振动幅度和浇注温度分别为1.5、1.75和2毫米以及1380、1430、1480和1530°C。实验结果表明，机械振动的应用使得K4169高温合金晶粒细化，等轴晶比例增加。枝晶生长受到抑制，显微组织由发达的枝晶晶转变为细小的等轴晶。随着振动幅度的增加，合金的晶粒尺寸减小。随着浇注温度的升高，合金晶粒尺寸先增大后减小，拐点为1430℃。当浇注温度为1380℃时，机械振动处理的合金晶粒最细。
The influences of different vibration amplitude and pouring temperature on solidified structure of superalloy K4169 under the action of mechanical vibration were investigated. The vibration amplitudes and pouring temperatures used were 1.5, 1.75 and 2 mm and 1380, 1430, 1480 and 1530°C, respectively. The experimental results show that application of mechanical vibration leads to increase in grain refinement and proportion of equiaxed grains of superalloy K4169. The dendrite growth is restrained and the microstructure is changed from well-developed dendrite grains to fine equiaxed grains. Grain size of the alloy decreases as vibration amplitude increases. With the increase of the pouring temperature, grain size of the alloy increases firstly, then decreases and the turning point is 1430°C. When the pouring temperature is 1380°C, grain size of the alloy with mechanical vibration treatment is the finest.