Preparation of Al-Ti-C.Sr Refiner by Orthogonal Experiment and Extrusion
[1]ZHAO Hongliang,GAO Ya,SUN Qiyan,et al.Preparation of Al-Ti-C.Sr Refiner by Orthogonal Experiment and Extrusion[J].Journal of Zhengzhou University (Engineering Science),2014,35(03):27-30.[doi:10.3969/j.issn.1671-6833.2014.03.007]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
35
Number of periods:
2014 03
Page number:
27-30
Column:
Public date:
2014-06-30
- Title:
- Preparation of Al-Ti-C.Sr Refiner by Orthogonal Experiment and Extrusion
- CLC:
- TG223
- Abstract:
- This paper prepared Al-Ti-C-Sr grain refiner by in - situ reaction with pure aluminum and K2TiF6 graphite powder, pure strontium. Orthogonal experiment was applied to oplimize the composition and preparation proeess of the Al-Ti-C-Sr reliner. The prepared Al-Ti-C-Sr refiner by oplimal scheme was extruded andthe mierostruelure and relining performanee were studied. The results show the oplimal scheme: compositionwas Al-3’Ti-0.2C-5Sr, K,TiF, and graphite powder were held 60 min, pure strontium was held 15 min. when Al-3Ti-0.20-5Sr was exlruded, the size of TiAl3, Al4Sr and Al-Ti-Sr phases decreases, and TiC phases distributed uniformly in the matrix. Afer adding extruded Al-3Ti-0.2C-5Sr in A356, the average grain size de.ereases from 1195 um to 350 ym, the seeondary dendrite arm spacing deereases from 23.2 um to 21.5 um.
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