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METHOD FOR EVALUATING DUCTILE CAST IRON MOLTEN METAL AND DUCTILE CAST IRON CAST USING THE SAME
METHOD FOR EVALUATING DUCTILE CAST IRON MOLTEN METAL AND DUCTILE CAST IRON CAST USING THE SAME
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机译：用相同方法评估球墨铸铁熔融金属和球墨铸铁的方法
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摘要
PROBLEM TO BE SOLVED: To provide a method for evaluating ductile cast iron molten metal for stabilizing at a low level, the generation of a shrinkage cavity upon casting by ductile cast iron molten metal, and to provide ductile cast iron cast using the method.;SOLUTION: Zr is added to ductile cast iron molten metal, a dendritic austenite structure present as a part of solid phases is made fine in the eutectic solidification stage of a solidification process for the ductile cast iron molten metal, so that the fluidity between the solid phases of the remaining liquid of the molten metal is improved in a solidification process. A part of the Zr-added molten metal is extracted to prepare a test piece. The test piece is treated so as to be in a state at which a dendritic austenite structure can be observed. The treated test piece is observed with a microscope. By evaluating the generation degree of the dendritic austenite structure in the test piece, the molten metal is evaluated regarding the generation of a shrinkage cavity in a mold.;COPYRIGHT: (C)2010,JPO&INPIT
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