Marc Glasser of Rolled Alloys, Temperance, Mich., presented a discussion of techniques for welding stainless steels and nickel-base alloys at the ASM International Heat Treat 2019 conference in Detroit. The ability to make weld repairs is often overlooked in the selection of heat-resistant alloys. However, wrought alloys have a distinct advantage in this area, because wrought alloys can be weld repaired even after extensive use.
Components that exhibit creep in the hottest areas can be easily checked for functionality with a magnet. Where necessary, the damaged area can be removed, and a new fabricated section or a patch can be welded into place, rather than completely replacing an entire fabrication.
Procedures for welding heat-resistant alloys are increasingly well documented. By understanding how both heat-resistant stainless steels and nickel alloys differ from carbon steels, good welding practices can be identified. Furthermore, tools are available to aid welders and maintenance workers in the proper welding consumables, shielding gases, and operating parameters needed to make a proper weld.
This paper covered factors to consider for obtaining the best welds for both heat-resistant austenitic stainless steels and nickel-base alloys; illustrated tools available to guide welders and engineers in determining the best alloys and consumables; and discussed the best practices for welding of these alloys.
Title: Tools and Best Practices for Heat Resistant Alloy Welding
Author: Marc Glasser, Rolled Alloys, Temperance, Michigan
www.rolledalloys.com
