Metal founding – Process – With measuring – testing – inspecting – or condition determination
Patent
1992-10-30
1994-04-26
Lin, Kuang Y.
Metal founding
Process
With measuring, testing, inspecting, or condition determination
249DIG4, 7386458, 7386453, 73DIG9, 374139, 374157, B22D 200, G01N 110, G01K 1312
Patent
active
053058151
ABSTRACT:
A method and apparatus for predicting nodularity of a hypo or hyper eutectic cast iron melt during casting is described. The method is particularly useful for NiMg-treated melts but can also be used for rare earth treated melts. A small sample of the melt is poured into a sample cup to which up to 0.025% wt bismuth is added and a cooling curve is produced during cooling. In a NiMg treated melt, a .DELTA.T (TER-TEU) of at least 9.degree. C. indicates good nodularity. In an RE treated melt, a .DELTA.T of less than 6.degree. C. at a TER/TEU of 1140.degree. C. also indicates good nodularity will be observed upon the solidification of the melt.
REFERENCES:
patent: 4059996 (1977-11-01), Cure
Pan Ping Zhu
Smith Reginald W.
Hicks Richard J.
Lin Kuang Y.
Queen's University
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