CASTING MATERIAL FOR ABRASION-RESISTANT PUMP BLOCK OF NUCLEAR-POWERED STEAM TURBINE AND MANUFACTURING METHOD THEREFOR

摘要

A method for preparing a casting material for an abrasion-resistant pump block of a nuclear-powered steam turbine, comprising the following steps: placing, in percentage by mass, 2-3.5% of aluminium, 7-8% of iron, 1-3% of manganese, 5-7% of nickel and the balance of copper in a mains frequency induction furnace, heating same to 1100°C, and maintaining the temperature after same has completely melted. In the provided casting alloy material for an abrasion-resistant pump block of a nuclear-powered steam turbine, titanium boride ceramic particles are added to a traditional bronze material to increase the hardness of the casting alloy material; and a corresponding rare earth element of lanthanum or cerium is appropriately added to further refine and improve the particle structure of the internal material of the alloy, so that the strength and hardness of the alloy material can be achieved without further forging or heat treatment of the material, so as to further satisfy the requirements of the materials for the abrasion-resistant pump block of a nuclear-powered steam turbine.