Journal
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH
Volume 28, Issue 4, Pages 242-247Publisher
MANEY PUBLISHING
DOI: 10.1179/1743133615Y.0000000005
Keywords
Grain refinement; DHP copper; Particle inoculation; Grain growth restriction; Columnar to equiaxed transition; Oxygen free copper
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Funding
- EPSRC
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The viability of grain refining phosphorus deoxidised, high residual phosphorus Cu (DHP-Cu) by particle inoculation through the formation of in situ Zr, Ti, Nb, La, Ce, Gd and Nd oxide particles, additions of WC and NbB2 particles as well as additions of Ti + B, Zr + B, Al + B and Ca + B with the purpose of forming in situ boride particles have been investigated under TP-1 casting conditions. Nominal additions of P in the range of 300-690 wt ppm and of Ag of 150 wt ppm have also been explored. In comparison, it appears that it is more difficult to grain refine DHP-Cu by particle inoculation than it is by the combined addition of P + Ag solute elements to a residual content of 396 ppm P and 143 ppm Ag (and having very low contents of Ti, Zr, Al, Ca and B microalloying elements) for the conditions studied.
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