The microstructure of semi-solid annular specimen prepared by inclined cooling body-centrifugal casting was observed.It was found that compared with those of the specimen obtained by conventional forming method

primary austenite in the semi-solid high Cr white cast iron becomes fine and equiaxed.The morphology and distribution of primary austenite in the semi-solid high Cr white cast iron are changed with the distance increase from the outer profile of the annular specimen

divided into four regions from external layer to internal layer

such as fine small austenite dendrite region

interface region of primary equiaxed austenite region and fine small dendritic austenite region and primary equiaxed austenite region

bulky primary dendritic austenite region

in which interface region lies about 10～15 mm from outer profile.