Services

Abrasive blasting works by placing a part in a blast cabinet and bombarding the part surface with an abrasive media propelled by compressed air at high velocity. Abrasive blasting removes surface contamination such as rust or paint and is often used to prepare the part surface for painting or other operations..  Read More

NATIONAL HEAT TREAT operates five batch atmosphere furnaces, each equipped with an integral oil quench. These furnaces are used for a variety of operations.  Read More

Box furnaces are used for a variety of operations including tempering, annealing, and normalizing.  Read More

Gas Nitriding is a surface hardening process in which nitrogen is diffused into the surface of a part to create a layer of hard nitride particles.  This imparts abrasion and wear resistance to the part.  Parts to be nitrided should be in the finish machined condition and previously heat treated to the desired mechanical properties.  Read More

OPEN FIRE HEAT TREATING is done in a furnace with an oxidizing atmosphere. Open Fire treatment can lead to the formation of oxide scales on part surfaces and is not suitable for finish-machined parts.  Read More

NATIONAL HEAT TREAT offers a wide range of testing and inspection procedures, performed in our own metallurgical laboratory or by qualified independent labs. Our testing equipment is calibrated at regular intervals by an independent third-party agency.  Read More

WHY VACUUM HEAT TREATING? At the elevated temperatures used in heat treating, metal surfaces react with oxygen, hydrogen, water vapor and other atmospheric gases to cause undesirable effects including oxidation, decarburization, cracking, corrosion damage, and discoloration. This is especially problematic when finish machined parts are being heat treated. Vacuum heat treating solves this problem by heat treating in a special vessel from which virtually all of the air has been removed. Quenching is performed using high velocity argon or nitrogen gas.  Read More