. . . . . . . . . . . . . . . . . . "1664894"^^ . . "Quench polish quench"@en . . . "3858"^^ . . "1053702811"^^ . . . . "Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. It is sometimes known by the brand name of Tufftride, Tenifer or Melonite. Three steps are involved: nitrocarburize (\"quench\"), polish, and post-oxidize (\"quench\"). This process is often used when two or more of the following properties are required in a workpiece: \n* wear resistance \n* corrosion resistance \n* lubricity \n* fatigue strength"@en . . . . . . . "Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. It is sometimes known by the brand name of Tufftride, Tenifer or Melonite. Three steps are involved: nitrocarburize (\"quench\"), polish, and post-oxidize (\"quench\"). This process is often used when two or more of the following properties are required in a workpiece: \n* wear resistance \n* corrosion resistance \n* lubricity \n* fatigue strength Common applications of the process are for piston rods of shock absorbers, cylinders and rods for hydraulic systems, pumps, axles, spindles, firearm slides and barrels and valves."@en . . . . . . . . . . . . . . . . . . . . .