Heat Treatment & Rubber Curing Salts
Hubbard-Hall manufactures molten heat treatment or heat treating salts to serve both the metal treating and rubber curing industries. These molten salts are manufactured using raw materials with the highest purity. Hubbard-Hall’s heat molten metal heat treatment salts are widely used for the following purposes: hardening, annealing, tempering, and isothermal quenching. Learn more about Heat Treatment Salt Product Melting Points.
Hardening and quenching in molten salt baths offer many benefits over other methods.
Benefits Over Other Methods
- Faster heating cycles
- Scale-free parts
- No pitting
- Reduced part distortion
- Elimination of quench cracks
- Easily washed
Designed to provide excellent fluidity and great stability, Hubbard-Hall’s neutral heat treatment salts are formulated with a balanced mixture of chlorides. The Neutral Salts highlighted in this section include only 1 non-barium product (neutral salt B). Selection of neutral salts is generally based on operating range.
Quenching and Tempering Salts
This line of heat treatment salts is composed of nitrate-nitrite salts for use as steel tempering or quenching media. All are completely water soluble, easily washed and have similar high-transfer rates and heat capacity.
Rubber Curing Salts
Rubber curing heat treatment salts are a high purity, eutectic mixture of nitrate and nitrite salts. They are formulated specifically for curing extruded rubber profiles at the lowest possible temperature ranges. All chemicals used in these rubber curing salts are water-soluble and do not form any insolubles. Therefore, the solidified salt is easily removed from the surface in a hot water spray rinsing station at the end of the trough just after emerging from the salt trough.
Solution Heat Treating/Annealing of Aluminum
Molten heat treatment salts provide the high degree of temperature uniformity required for the satisfactory heat treatment of aluminum alloys. Hubbard-Hall’s aluminum heat treatment salts are free flowing and high purity products.
Molten descaling salts can be used to remove oxide scales from both ferrous and non-ferrous metals. Molten Descaling Salts have the ability to produce clean, scale-free surfaces without base metal loss, pitting or etching.