What is a common remedy for preventing chromium from forming carbides in stainless steel?

Adding titanium to stainless steel is a common remedy for preventing chromium from forming carbides. During the welding process or at elevated temperatures, chromium can combine with carbon to form chromium carbides, particularly in high-temperature applications. This reaction leads to depletion of chromium in the surrounding metal, which subsequently reduces the corrosion resistance of the stainless steel.

Titanium has a strong affinity for carbon and can form titanium carbides instead, which helps to stabilize the chromium in the stainless steel matrix. By doing so, titanium serves to maintain the alloy's corrosion resistance and overall mechanical properties, making it a beneficial addition in specific stainless steel grades, especially in environments where carbide precipitation could occur.

This practice is particularly relevant in the context of weldability and heat treatment of stainless steel, where maintaining a high level of chromium is crucial for performance and longevity in corrosive environments.