Metal Surface Heat Treatment

Nitriding Quenching Salt

QPQ technology is a revolutionary new technology in the field of metallurgy. It permeates variety of metal elements to the surface in the two different nature of the bath which can improve wear...

Molten Salt for Quenching

CTRI QPQ independently developed a unique salt bath formula in late 1980s after long time research and development.

Nitriding Oxide Base Salt

In recent years, CTRI made new progress. CTRI successfully developed second generation of QPQ technology and improved QPQ equipment, making it easier for customer operation, further reducing...

Salt Quenching Steel Valve High Temperature

According to the result of slid-wear testing, the wear resistance of medium carbon steel with QPQ treatment is 30 times than conventional quenching.

Salt Quenching Steel Valve Low Temperature

In recent years, CTRI made new progress. CTRI successfully developed second generation of QPQ technology and improved QPQ equipment, making it easier for customer operation, further reducing...

Heat Treatment Furnace

Provide detailed technical data, complete set of process documents, equipment drawings, complete sets of special equipment (a total of six series of specifications for selection), paid supplies...