Pressure pipe tee joint extrusion forming method

Abstract

The invention provides a pressure pipe tee joint extrusion forming method. The method comprises the following steps that a continuous casting blank serves as a raw material, and an extrusion blank is manufactured through a construction forming method; the extrusion blank is placed in a combined tee joint die, a tee joint branch pipe and a tee joint main pipe are sequentially extruded through an integrated extrusion forming process, and a tee-joint-shaped blank is manufactured; and after the combined tee joint die is adopted to demold the tee-joint-shaped blank, a pressure pipe tee joint finished product is manufactured through machining. According to the pressure pipe tee joint extrusion forming method, welding seams of the pressure pipe tee joint are reduced, the tensile property of materials and the uniformity of impact energy are improved, and under the condition that the working condition load is complex, safety is improved, and the manufacturing period is shortened.

Description

Technical field[0001]The present invention relates to the field of nuclear power main pipe manufacturing, and more particularly to a three-way extrusion molding method.Background technique[0002]In the atomic energy fast heap project, the pressure tube is used to connect a loop pump support the exit and a large gateboard with a large gateboard, providing a flow path for cooling sodium liquid, a part of a circuit main cooling system.[0003]Once the pressure tube is installed, it is not reached in service, and is a non-replaceable member. The conditions of pressure tube conditions are complex, including pre-service pre-pressure test, installation, sodium sodium, start hea, replacement, full power, expected operating events, rare accidents, limit accidents, withholding loads contain pressure, temperature, fluid flow Vibration, main pump rotation load, so its failure mode includes intensity, low-week fatigue, and high-week fatigue.[0004]As an important part of the pressure tube, the shape...

AI Technical Summary

Problems solved by technology

[0007] In view of this, aiming at the technical problem of the current lack of tee manufacturing process for nuclear power fast reactor pressure tubes, the present invention provides a pressure tube tee extrusion forming method, which reduces the weld seam of the pressure tube tee and improves the tensile properties of the material , The uniformity of impact energy, in the case of complex working conditions and loads, improve safety and shorten the manufacturing cycle

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