Effect of Ultrasonic Treatment on the Solidification Microstructure of Die-Cast 35CrMo Steel

被引:14
|
作者
Liang, Gen [1 ]
Shi, Chen [1 ,2 ]
Zhou, Yajun [1 ]
Mao, Daheng [1 ]
机构
[1] Cent S Univ, Coll Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Natl Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China
关键词
35CrMo steel; casting; solidification microstructure; ultrasonic treatment; grain refinement; GRAIN-REFINEMENT; VIBRATION;
D O I
10.3390/met6110260
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effects of ultrasonic treatment (UST) on the solidification microstructure of a 35CrMo steel cast ingot were investigated. To avoid the erosion of a high-temperature melt, a T-shaped ultrasonic waveguide unit was used to introduce ultrasonic vibrations into a 35CrMo steel die casting melt. The experimental results show that the microstructure of the ingot was refined by ultrasonic treatment. While the microstructure of untreated 35CrMo steel is coarse dendritic grains, after the introduction of ultrasonic treatment, the solidification microstructure transforms from coarse dendritic to equiaxed grains, and the dendrites are also refined. Samples from different positions of the ingots were subjected to different ultrasonic effects, and the effects on grain refinement also varied due to the severe attenuation of the ultrasound in the melt. The mechanisms of grain refinement using ultrasonic treatment for 35CrMo steel melt are presented.
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页数:8
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