Electric smelting forming method for ultra-supercritical high intermediate pressure rotor

Abstract

The invention provides an electric smelting forming method for an ultra-supercritical high intermediate pressure rotor. The method is efficient and low in cost and has the good mechanical property. The method comprises the steps that an electric smelting head and a base material are connected to two electrodes of a power source; in the forming process, metal raw material wires are conveyed to the surface of the base material through a conveying mechanism and the electric smelting head; under accumulation protection of granular auxiliary materials, an electric arc is generated between the raw material wires and the base material, and the auxiliary materials are accumulated and laid on a smelting portion to form a melting slag pool; currents flow through the raw material wires and the melting auxiliary material slag pool to form resistance heat and electric slag heat; under the effect of three heat composite high-energy heat sources of electric arc heat, resistance heat and electric slag heat, the raw material wires are smelted, and a local smelting pool is formed on the surface of the base material; the raw material wires and the auxiliary materials are continuously conveyed, and according to layered section data of a forming component, a computer is adopted to control relative moving between the electric smelting head and the base material; and rapid cooling layer-by-layer solidification accumulation of the smelting pools on the base material is achieved, and finally layer-by-layer accumulation is carried out to form a rotor component.

Description

technical field [0001] The invention relates to an electrofusion forming method for an ultra-supercritical high-medium-voltage rotor. Background technique [0002] The coal consumption of ultra-supercritical units for power generation is less than 300Kg / kwh, which is about 20g less coal per kilowatt-hour than subcritical units of the same capacity. Therefore, it is the main development direction of clean coal power generation technology in my country, and it is also a solution to the current power shortage and energy utilization. A realistic and effective approach to problems such as low environmental pollution and serious environmental pollution. [0003] Ultra-supercritical high and medium pressure rotors are alloy steel forgings that operate in high-temperature and high-pressure environments. The operating conditions are the most stringent, the safety requirements are the highest, and the product manufacturing is extremely difficult. Currently, only a few companies in Germ...

AI Technical Summary

Problems solved by technology

my country's supercritical technology started late. Although major domestic manufacturers have carried out a lot of technical research, the 12% Cr system high and medium pressure rotor as the core component is currently 12% Cr due to problems in the research and development of materials and the lack of corresponding supporting equipment. High and medium pressure rotors can only rely on imports

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