Treatment:
Penetrate to the steel surface nitrogen to form a hardened layer of nitrogen-rich chemical treatment called nitriding , also commonly known as nitriding, soft nitriding , salt bath soft nitriding .

Nitriding heat treatment of steel has the following advantages :
1 nitriding steel carburized parts to have a higher surface hardness and wear resistance, surface hardness up to 950-1200HV, equivalent to HRC65-72. And this high hardness and high wear resistance can be maintained to 560-600 ° C without degrading , and has good thermal stability.
(2) Since the volume swell nitride , is formed on the surface of large residual stress, the carburized steel having a high fatigue strength ratio and low notch sensitivity ; 3 dense nitride layer is a nitride film having good corrosion resistance and anti-seize properties
4 Due to the nitriding treatment temperature is low, and no longer heat treatment nitriding, carburizing treatment thus deformed steel small. Therefore, nitriding treatment is widely used in machinery industry, especially suitable for many of the final heat treatment of precision parts , such as grinding spindle , boring boring bar , machine screw and a variety of cold mold, hot die , plastic mold and high speed steel molding tool , adopted nitriding treatment .

Su's heat treatment Co. Ltd. was founded in 1990, after decades of development, scale is continually expanding, is located in Shajing Town Baoan District Shenzhen City Bridge second industrial zone, covering an area of 3000 square meters, the main business is to take all the metal, alloy steel, beryllium copper, heat treatment of high speed steel, cryogenic treatment (-196 C), nitrogen gas, liquid nitrogen, QPQ salt bath production line, high-frequency quenching, blackening and carburizing, the surface of hard and stainless steel processing.
The company is equipped with power of heat treatment technology, established a perfect quality testing equipment, equipped with vacuum quenching furnace, vacuum furnace, pit furnace, furnace, liquid nitrogen atmosphere furnace, rotary furnace, large mesh belt furnace, improve metallographic inspection equipment, material failure analysis, scientific management and complete, rigorous technology, skilled operation.
Company will be excellent quality and perfect service, and actively challenge, satisfy customer demand, has passed ISO9001:2000 in 2003 September (SGS) international quality certification. Has now become a reputable manufacturers.