By using 250 mm thick square cast block and D-type attached test block to simulate heavy section of wind power casting,comparatively analyzed the metallurgical structure and mechanical properties of test blocks treated with 2 special efficiency inoculants.The test results showed that the tensile strength and yield strength of S-O inoculants treated test block were better than that of Si-Al inoculants treated test block,and the graphite number was more than that of Si-Al inoculants treated test block.The low temperature impact property of D-type test block treated with Si-Al inoculants was better than that of S-O inoculants treated test block.The impact property difference of 250 mm test blocks treated with 2 inoculants were not obvious.The graphite numbers at geometric core place of 250 mm thick cast blocks treated with both 2 inoculants higher than that of top and bottom surfaces.
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