粉末挤压提高Al-5Ti-1B合金组织均匀性和晶粒细化效率

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI:10.1051/metal/2020069

Shun-cheng Wang, Huilan Huang, Zhibo Zhang, K. Zheng

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引用次数: 0

摘要

采用X射线衍射仪、扫描电镜和电子探针对粉末挤压法和连铸连轧法制备的Al-5Ti-1B合金棒材的组织均匀性和晶粒细化效率进行了详细研究。通过气体雾化和热挤压法制备的Al-5Ti-1B粉末合金中，TiB2和TiAl3颗粒均匀分布。经0.2%粉末挤压的Al-5Ti-1B合金棒材保温2 min后，样品为平均直径为183µm的等轴晶粒。即使保温时间延长到180 min，平均直径仍然稳定(229µm)。粉末挤压法制备的Al-5Ti-1B合金棒具有较好的晶粒细化和较强的抗晶粒粗化能力。

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Enhancement of microstructure uniformity and grain refining efficiency of Al-5Ti-1B alloy via powder extrusion

Microstructure uniformity and grain refining efficiency of Al-5Ti-1B alloy rod prepared by powder extruded process and continuous casting and rolling process are investigated in detail by X ray diffractometer, scanning electron microscope and electron probe. It is found that TiB2 and TiAl3 particles are uniformly distributed in the powder extruded Al-5Ti-1B alloy via gas atomization and hot extrusion process. The samples with 0.2% powder extruded Al-5Ti-1B alloy rod holding for 2 min consist of equiaxed grains with an average diameter of 183 µm. Even the holding time extended to 180 min, the average diameter is still stable (229 µm). Al-5Ti-1B alloy rod prepared by the powder extruded process presents better grain refinement and stronger resistance to grain coarsening.

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来源期刊

Revue De Metallurgie-cahiers D Informations Techniques 工程技术-冶金工程

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0.00%

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审稿时长

24 months