Preparation and Solidification Process of Al-3Ti-0.2C-5Sr Grain Refiner
[1]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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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36卷
Number of periods:
2015 06
Page number:
14-
Column:
Public date:
2015-12-25
- Title:
- Preparation and Solidification Process of Al-3Ti-0.2C-5Sr Grain Refiner
- Keywords:
- grain refiner; preparation; solidification process; Al-Ti-Sr phase
- CLC:
- TG292
- DOI:
- 10.3969/i.issn.1671 -6833.2015.06.004
- 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.
- References:
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