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浇注温度和机械振动对消失模铸造镁合金组织和力学性能的影响

Effects of Pouring Temperature and Mechanical Vibration on Microstructure and Mechanical Properties of Lost Foam Casting Magnesium Alloy

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【作者】 王元庆樊自田李继强田学锋董选普

【Author】 WANG Yuan-qing, FAN Zi-tian, LI ji-qiang, TIAN Xue-feng, DONG Xuan-pu(State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China)

【机构】 华中科技大学材料成形与模具技术国家重点实验室华中科技大学材料成形与模具技术国家重点实验室 湖北武汉430074湖北武汉430074

【摘要】 研究结果表明:低的浇注温度有利于细化AZ91D消失模铸件试样的晶粒和提高其力学性能,但低于740℃时晶粒细化程度和力学性能相差不大;机械振动能明显细化不同浇注温度下的消失模AZ91D晶粒,且在740℃温度下细化程度最好;机械振动能大幅提高AZ91D消失模铸件试样的力学性能,其中抗拉强度和断后伸长率相比于铸态的,分别提高了23.2%和20.8%。

【Abstract】 The effects of pouring temperature and mechanical vibration on microstructure and mechanical properties of AZ91D alloy via LFC were investigated in this paper. The results showed that it is propitious to refine the grain of AZ91D alloy via LFC and improve its mechanical properties at low pouring temperature, but the refined effort is not obvious and its mechanical properties is near after lowering to 740 ℃; the grain of AZ91D alloy at different pouring temperature can be obviously refined by mechanical vibration, and the refined effort is best at 740 ℃; mechanical vibration can also improve its mechanical properties to a great extent, and the values of tensile strength, elongation are respectively improved by 23.2%、20.8%, compared to as-cast.

【基金】 国家自然科学基金资助项目(50275058)
  • 【文献出处】 铸造 ,Foundry , 编辑部邮箱 ,2007年03期
  • 【分类号】TG249.5
  • 【被引频次】27
  • 【下载频次】383
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