利用电阻炉加热，采用电子显微镜及图象分析仪，研究了近液相线铸造a 356铝合金在二次加热过程中的组织变化。

Using resistance furnace, the structure of A356 aluminum alloy casted by nearby liquidus semi-continuous was studied during remelting by means of electron microscope and image analysis apparatus.

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对武汉钢铁（集团）公司100炉次钢材试样进行了化学成分全分析，显微组织参数和力学性能测试，并对它们之间关系进行了统计回归分析。

Samples of 100 heats were collected from Wuhan Iron and Steel Corporation (Wugang). A comprehensive chemical analysis was made and mechanical properties and microstructural parameters were measured.

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