Arc Additive Manufacturing Method for Flange Parts

Abstract

The invention relates to an arc additive manufacturing method for a flange, which includes: selecting a substrate, wire material, protective gas and equipment; adopting the arc additive manufacturing method to complete multi-layer and multi-channel accumulation on the substrate from inside to outside in a spiral path Complete the production of the bottom surface and lower neck of the flange; complete the accumulation of multiple layers and single channels on the lower neck with a circular path to complete the production of the upper neck of the flange, and control the temperature, current, lap rate, and behavior between layers Speed; cut off the excess part of the substrate, perform solution treatment, control temperature, constant temperature time, and water cooling. The invention gets rid of the constraints of complex tooling, molds and special tools, and the formed blank only needs a small amount of finishing, which greatly simplifies the processing procedure, shortens the product manufacturing cycle, and can realize personalized production in a customized manner. The quality of non-destructive testing is qualified, the metal is pure, the structure and plastic toughness are optimized, the anisotropy phenomenon is improved, and the performance meets the quality and performance requirements of similar forgings.

Description

technical field [0001] The invention relates to an arc additive manufacturing method for a flange. Background technique [0002] At present, the operating cycle of nuclear power units in my country exceeds 20 years. Due to the complex working conditions of nuclear power plants, the components are required to serve safely for a long period of time under extreme conditions. As an important component of the piping system, flange components must withstand high temperature, high pressure, and corrosion. Therefore, damage such as corrosion and erosion will inevitably occur and even need to be replaced, and this replacement is unplanned in many cases and no spare parts are available. [0003] Traditional flange parts are formed by steel ingot smelting, casting, forging, etc., and undergo auxiliary heat treatment and final machining. The final performance meets the technical requirements. However, the traditional method has many manufacturing processes and long production cycles. Le...

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Problems solved by technology

[0002] At present, the operating cycle of nuclear power units in my country exceeds 20 years. Due to the complex working conditions of nuclear power plants, the components are required to serve safely for a long period of time under extreme conditions. As an important component of the piping system, flange components must withstand high temperature, high pressure, and corrosion. environment, so corrosion, erosion and other damage will inevitably occur and even need to be replaced, and this replacement is unplanned in many cases, and no spare parts are available

[0003] Traditional flange parts are formed by steel ingot smelting, casting, forging, etc., and undergo auxiliary heat treatment and final machining. The final performance meets the technical requirements. However, the traditional method has many manufacturing processes and long production cycles. Less, it is difficult to form batch production, resulting in high production cost and long production cycle of a single component, which will inevitably lead to extended maintenance cycle of power plant units, which will seriously affect the economics of power plant operation

[0004] As a rapid prototyping technology, additive manufacturing has been widely used in aerospace and other fields due to its high degree of manufacturing flexibility, short molding cycle, and fast processing speed. Mainly, but this type of method is limited by the space and efficiency of the equipment, it is not suitable for the additive manufacturing of large components such as flanges, and the arc additive manufacturing method can solve the problem of space and efficiency, and is suitable for the production of large components

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