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第五章 铸件宏观组织及其控制 PowerPoint PPT Presentation


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第五章 铸件宏观组织及其控制. 第一节 铸件的宏观组织 第二节 表面激冷区及柱状晶区的形成 第三节 内部等轴晶的形成机理 第四节 铸件宏观结晶组织的控制. 内部等轴晶区. 表层急冷晶区. 中间柱状晶区. 第一节 铸件的宏观组织. 激冷晶区的晶粒细小 ; 柱状晶区的晶粒垂直于型壁排列,且平行于热流方向 . 内部等轴晶区的晶粒较为粗大 ;. 图 5-2 几种不同类型的铸件宏观组织示意图 ( a )只有柱状晶 ; ( b )表面细等轴晶加柱状晶 ; ( c )三个晶区都有 ; ( d )只有等轴晶.

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第五章 铸件宏观组织及其控制

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