Carbide Valve Plug Tip Fastening Without Brazing Stress Risers

The attachment structure is segmented into distinct components: a countersunk bore in the plug base, a carbide insert with its own bore, and a separate cap screw. This segmentation eliminates the stress risers that occur in monolithic shrink fit or brazed joints by distributing the attachment function across multiple discrete elements, each performing a specific function without creating stress concentration at material interfaces.

The patent replaces thermal processes (shrink fit heating, brazing) with a purely mechanical fastening system using a cap screw. This substitution eliminates the need for specialized thermal processing equipment and procedures, simplifying manufacturing while maintaining secure attachment. The mechanical fastening system can be assembled using standard tools and processes.

The attachment system transitions from a permanent or difficult-to-disassemble joint (shrink fit or brazing) to a dynamic, easily adjustable mechanical fastening system. The cap screw can be readily loosened and tightened, allowing for simple maintenance, inspection, and retrofitting of carbide inserts without requiring specialized thermal processing equipment or procedures.