[1]吴迪,赵红亮.Al-3Ti-0.2C-5Sr铝合金细化剂制备工艺及凝固过程[J].郑州大学学报(工学版),2015,36(06):14.[doi:10.3969/i.issn.1671 -6833.2015.06.004]
　ZHAO Hongliang,ZHAO Kaixin,SUN Qiyan.Preparation and Solidification Process of Al-3Ti-0.2C-5Sr Grain Refiner[J].Journal of Zhengzhou University (Engineering Science),2015,36(06):14.[doi:10.3969/i.issn.1671 -6833.2015.06.004]
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Al-3Ti-0.2C-5Sr铝合金细化剂制备工艺及凝固过程()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
36
期数:
2015年06期
页码:
14
栏目:
出版日期:
2015-12-25

文章信息/Info

Title:
Preparation and Solidification Process of Al-3Ti-0.2C-5Sr Grain Refiner
作者:
吴迪; 赵红亮
1.郑州大学材料科学与工程学院,河南郑州450001;2.河南机电高等专科学校汽车工程系,河南新453002
Author(s):
ZHAO Hongliang1; ZHAO Kaixin2; SUN Qiyan1
1. School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China; 2. Department of AutomotiveEngineering & Technology，Henan Mechanical and Electrical Engineering College，Xinxiang 453002，China
关键词:
细化剂; 制备; 凝固相变; Al-Ti-Sr相
Keywords:
grain refiner;  preparation;  solidification process; Al-Ti-Sr phase
分类号:
TG292
DOI:
10.3969/i.issn.1671 -6833.2015.06.004
文献标志码:
A
摘要:
研究了浇铸温度﹑冷却速度和保温时间对AlI-3Ti-0.2C-5Sr铝合金细化剂显微组织的影响,并通过DSC分析及液淬实验研究了其凝固过程.结果表明: Al-3Ti-0.2C-5Sr铝合金细化剂主要由TiAl,相、AI-Ti-Sr相、TiC颗粒及少量AlI,Sr相组成;随着浇铸温度的降低,合金中TiAl,相由长条状逐渐转变为块状,AlI-Ti-Sr相由包覆状转变为包覆状和块状共同存在;随着冷却速度的降低，TiAl,相尺寸减小,包覆状Al-Ti-Sr相增厚;随着保温时间的延长，TiAl,相逐渐消失,包覆状AlI-Ti-Sr相转变为大块状;Al-3Ti-0.2C-5Sr细化剂的液固区间为800 ~640 ℃,各相析出顺序为: TiAl,相、AlI-Ti-Sr相、Al,Sr相、a-Al相.
Abstract:
The influence of casting temperature,holding time and cooling rate on Al-3Ti-0.2C-5Sr alloy mi-crostructure,and the solidification processes were studied by DSC analysis and liquid quenching experiments.The results show that,Al-3Ti-0.2C5Sr grain refiner is composed of TiAl, phase,Al-Ti-Sr phase,TiC phaseand small amounts of Al,Sr phase. With the increase of casting temperature,strip TiAl; phases in the alloygradually transforms into massive,and the coated Al-Ti-Sr phases can change into block Al-Ti-Sr phases.With the decreasing cooling rate,size of TiAl, decreases the coated Al-Ti-Sr phases thickens. With the in-crease of the holding time,TiAl, phase gradually disappears, and the coated Al-Ti-Sr phases become big blockphases. Liquid-solid temperature range of Al-3Ti-0.2C-5Sr grain refiner is 800 ~ 640 ℃,precipitation se-quence of phases is TiAl, phases,Al-Ti-Sr phases,Al,Sr phases and o-Al.

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