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Theoretical and technological research on improving cleanliness of casting Al alloy(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2010年05期
Page:
44-49
Research Field:
工艺与材料
Publishing date:

Info

Title:
Theoretical and technological research on improving cleanliness of casting Al alloy
Author(s):
WANG Lin;  YANG Huan-qing
Xi’an Space Engine Factory, Xi’an 710100, China
Keywords:
mechanism analysis;  rotary blowing-flux method;  ZL104 alloy;  purification parameter
PACS:
TG292-33
DOI:
-
Abstract:
Based on the mechanism analysis of floating refinement, it's concluded that the increase of flux quantity can improve degassing effect; however, the excess flux probably results in secondary reaction inclusion in liquid aluminum; the increase of degassing time can improve degassing effect before the equilibrium concentration of H is reached; and H content decreases first and then increases with the prolongation of stewing time. In order to determine the H content in liquid aluminum after purification by rotary blowing-flux method, a multi-factor experiment for purification parameters was designed according to uniform design theory. The rotary blowing-flux process specifications were determined based on the stepwise regression and linear regression analyses of the experimental results: the addition of the refining flux is 0.2%, the degassing time 10 min and stewing time 15 min.

References:

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