Centrifugal ductile iron pipe mould is referred as cast pipe mould, which is used in the production of centrifugal cast ductile iron pipe. It is a kind of large - scale hot - working tooling, which belongs to the consumed prodicts in centrifugal casting industry. The cast pipe mould is always in bad working conditions in production: high-speed rotation, the outer surface is contained by cooling medium(water), the inner surface(working surface) is 1320-1400℃ hot metal adhesion. The cast pipe mould is always under the cold and heat alternating stress, tensile stress and torsion stress and other forces.