电渣熔铸3Cr2W8V模块

PRODUCING DIE BLANK OF 3Cr2W8V STEEL BY ESC TECHNOLOGY

The paper studied a method for using damaged dies to produce die blanks by electroslag shaped casting. It is shown that the products of electroslag shaped casting are provided with good purity, high density, uniform distribution of elements, isotropy and smooth surface, the service life of which is 15 % to 20 % longer than that of the conventional forging products. The smelting quality can be improved by controlling the shape of consumable electrode tip, which affects the area of the slag/metal interface in electroslag shaped casting process. The mould used in the process is made of red copper and the motion of water in the jacket is maintained in a state of turbulent flow. It is essential to conirol the thickness of slag crust formed on the mould wall no more than 1mm in order to obtain the casting products with excellent uniformity in regard to chemical composition and structure. The properties of the dies can be improved through pre treatment-high tempreature annealing or normalizing.