Liquid cyaniding salt series (Liquid cyaniding salt and Restorable salt in liquid cyaniding) The technique is similar to Teffier. But the salt is R&D by Gnail. Heattreatment temperature: 720癈 or so Thickness of the surface hardening layer: 0.08 to 0.3mm Colour after heattreatment: Grey Comparing with high hardness, high intension and wearability surface after quenching, the plasticity and toughness can keep well at core by liquid cyaniding. A lot of workpiece needed anti-strike and antiwear were heattreated by the technology, such as motorcycle gears, machine gears, low modul motor gears, highspeed sartorius parts, tools, bicycle parts, mandril of plastic machine, food machine parts and sheet-shaped hardwares with hardness and toughness, etc.