How to weld Inconel.
Inconel is a highly corrosion resistant alloy that performs very well in extreme environments.Inconel is a registered trademark of the Special Metals family. They are registered as an austenitic nickel-chromium based superalloy.
Inconel alloys maintain high tensile strength even at the melting or burning temperatures of many other golds. Welding is the process of joining separated metal parts together, usually by heating them to the melting point to achieve a fusion. When heated, Inconel produces a layer of dense, stable, inert oxide to protect the surface from further erosion.Inconel retains its strength over a wide range of temperatures, which is ideal for high-temperature applications, where aluminium and steel succumb to creep due to heat-induced crystal vacancies.
The excellent and flexible corrosion resistance of Inconel alloys over such a wide range of temperatures and pressures is the main reason for their widespread adoption in chemical processing.Inconel alloys are oxidation-corrosion resistant components that are ideally suited for use in high-pressure and kinetic-energy end environments. When heated, Inconel produces a dense and durable layer of inert oxide that protects the surface from further erosion.
Applications for Inconel Alloys.
Inconel alloys are corrosion-resistant super alloys that are typically used in extreme environments where, despite tremendous heat and corrosion resistance, the quality of the end product is critical. These Inconel super alloys are widely used in chemical processing, nuclear, petrochemical, aerospace aviation and marine industries. Due to all these properties, Inconel alloys can be used in a variety of applications, including seawater applications.
The use of Inconel can be found in the following industries:
-Nuclear reactors
-Torch towers on offshore oil platforms.
-Components that need to be exposed to high mechanical stress and seawater
-Pollution control equipment
Welding Inconel.
Tip 1: Welding Inconel with an Automated Welding System
Completing welding operations by hand is inconsistent. When a welder enters the process, a few welds may be sloppy, the next few welds may be the fastest, and the majority of the welds may be problematic due to welder fatigue when performing the same action over and over again.
The benefits of using an Inconel automated welding system include increased consistency, safety and final quality. Instead of having a person carry Inconel electrodes and an arc welder, they can easily set up a robot as if they were supervising a dangerous job.
Tip 2: Use Tungsten Inert Gas (TIG)
Many professional welders recommend adding filler material to the TIG welding process. Although this arc welding method does not usually require filler material, due to the difficulty of Inconel welding, it is recommended that filler material be used to hold two metal parts together without destroying them.
Due to the extremely high melting points of most Inconel alloys, it is often impractical to directly join two Inconel pieces (especially larger pieces). Instead, the best way to weld Inconel alloys is usually to use a welding process that combines high temperatures with filler material.
Tip 3: Inconel 625 is a reliable filler material.
Using a metal that is too large for the metal being joined can lead to problems such as bimetallic corrosion or differences in thermal expansion at high temperatures. After all, having a “heat-resistant” Inconel basket will not do you much good if the welds joining the pieces together are separated during heat treatment.
Post time: Jul-22-2023
