冷却槽对自孕育法制备ZA92镁合金组织的细化作用<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.012.021

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Abstract ZA92 magnesium alloy was prepared by self-inoculation method(SIM). Refined role of cooling channel on microstructure was studied, and refined mechanism was analyzed. Results show that nucleation in melt were effected by chilling action of cooling channel, flow velocity and shear force of the melt. The suitable slope angle of cooling channel was favorable for liberation and proliferation of the grains.When the melt was flowing on the cooling channel, the microstructure evolution was coarse dendrite→fined dendrite→equiaxed grain→rose crystal→near spherical crystal. Neither smaller nor bigger cooling channel angle was benefitial for refined grain. When cooling channel angel was between 30-45°, the distribution of grain size was more concentrated and smaller, and the average grain size was between 47.5-51.4 μm.

Key words： cooling channel ZA92 magnesium alloy refined grain self-inoculation method

Published: 25 June 2017 Online: 2018-05-08

CLC number:

TG146.2

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	Articles by authors
	LI Chun
	FAN Xinhui
	YUAN Xunfeng
	NAN Ning
	HAN Xi
	LI Yuandong

Cite this article:

LI Chun,FAN Xinhui,YUAN Xunfeng, et al. Grain Refinement Effect of Cooling Channel on ZA92 Magnesium Alloy Prepared by Self-inoculation Method[J]. Materials Reports, 2017, 31(12): 98-103.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.012.021 OR https://www.mater-rep.com/EN/Y2017/V31/I12/98

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