Large-size special-shaped stainless steel pipeline and efficient additive manufacturing device and method thereof

Abstract

The invention discloses a large-size special-shaped stainless steel pipeline and an efficient additive manufacturing device and method thereof, and innovatively provides a TIG + MIG double-gun electric arc additive manufacturing process, a medium carbon steel pipe base body with the surface wrapped with a layer of stainless steel thin plate is selected as a mold core, multiple sections of straight bent pipes with different lengths are prepared, grooves are prefabricated in the connecting positions of the straight pipes, and the large-size special-shaped stainless steel pipeline is manufactured. And laser deep penetration welding connection is carried out at the groove, so that the large-size special-shaped stainless steel pipeline with excellent performance is obtained.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a large-size special-shaped stainless steel pipe and its additive manufacturing equipment and method. Background technique [0002] Steel pipe refers to a steel material with a hollow section whose length is much greater than the diameter or circumference. According to the production process, it can be divided into seamless steel pipe and welded steel pipe. Seamless steel pipes can be used in various industries such as liquid pressure pipelines and gas pipelines. Welded pipes can be used for water pipes, gas pipes, heating pipes, electrical pipes, etc. And large-size special-shaped stainless steel pipes (the "special shape" here is not the cross-sectional shape of the steel pipe, but refers to the complex three-dimensional structure of the space), such as Figure 1a and Figure 1b As shown, it belongs to large metal parts. The traditional manufacturing methods m...

AI Technical Summary

Problems solved by technology

However, large-scale metal parts are prone to defects such as porosity, shrinkage cavity, and inclusions during the casting process; at the same time, when forging large-scale parts, there are insufficient tonnage of forging presses, high mold processing costs, etc., plus cumbersome manufacturing processes and long processing cycles. The problem has plagued the manufacture of related equipment for a long time and has become a bottleneck restricting the further development of the large metal pipe fittings manufacturing industry

Especially for materials with high alloy content such as stainless steel, in the process of preparing thick-walled pipe fittings, the traditional forming process is easy to cause defects such as uneven structure, and the huge difference between the welding process and the forming process will seriously cause the structure of the weld. performance flaws

Images