东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (10): 1426-1430.DOI: 10.3969/j.issn.1005-3026.2015.10.013

• 材料与冶金 • 上一篇    下一篇

铸造工艺参数对半连续铸造A390合金管坯宏微观组织的影响

左克生， 张海涛， 秦克， 崔建忠   

  1. (东北大学 材料电磁过程研究教育部重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2014-09-14 修回日期:2014-09-14 出版日期:2015-10-15 发布日期:2015-09-29
  • 通讯作者: 左克生
  • 作者简介:左克生(1987-)，男，安徽安庆人，东北大学博士研究生; 崔建忠(1950-)，男，黑龙江双城人，东北大学教授，博士生导师.
  • 基金资助:
    国家重点基础研究发展计划项目(2012CB723307-03)； 国家自然科学基金资助项目(51204046)； 中央高校基本科研业务费专项资金资助项目(N130409003).

Effects of Casting Process Parameters on Macrostructure and Microstructure of A390 Alloy Hollow Billet Produced by DC Casting

ZUO Ke-sheng， ZHANG Hai-tao， QIN Ke， CUI Jian-zhong   

  1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China.
  • Received:2014-09-14 Revised:2014-09-14 Online:2015-10-15 Published:2015-09-29
  • Contact: ZHANG Hai-tao
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摘要： 采用半连续铸造方法制备了A390合金管坯.研究了铸造速度和铸造温度对A390合金管坯宏微观组织的影响.结果表明:随着铸造速度由90mm/min提升至120mm/min、铸造温度由800℃增加至850℃，管坯中初生Si宏观分布趋于均匀，初生Si颗粒的平均尺寸逐渐减小.截面尺寸为164mm/60mm的半连续铸造A390合金管坯的最佳铸造工艺参数为:铸造速度110mm/min、铸造温度850℃，可以获得初生Si宏观分布均匀、初生Si颗粒平均尺寸不超过26μm的管坯，管坯内侧的抗拉强度为264MPa，延伸率为0.5%.

关键词: A390合金, 初生Si, 管坯, 铸造温度, 铸造速度

Abstract: DC casting was used to produce A390 alloy hollow billet. The effects of the casting speed and temperature on the macrostructure and microstructure of A390 alloy hollow billets were studied. The results showed that the distribution of primary Si in the hollow billet became more even and the average size of primary Si particle decreased gradually with the increase of the casting speed from 90mm/min to 120mm/min and casting temperature from 800℃ to 850℃，respectively. The optimum casting process parameters for the A390 alloy hollow billets of 164mm/60mm were obtained with the casting speed of 110mm/min and casting temperature of 850℃. The primary Si particles uniformly distributed with their average size less than 26μm obtained under the optimum casting process parameters. The ultimate tensile strength and elongation at the inner wall of the hollow billets were 264MPa and 0.5%， respectively.

Key words: A390 alloy, primary Si, hollow billet, casting temperature, casting speed

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