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Tool Steel - Low Friction Coatings for metal - 2012-12-10 22:48:00
Extrusion tool steel, in particular at higher temperatures, many challenges. Except that it is both adhesive and wear, but oxidation products of concern as well. Iron oxide, for example, from the oxygen can significantly speed up the wear. Consider the minimum oxygen content of your material, stripping the oxide sand blasting or even to maintain the atmosphere in the absence of oxygen. Proper Graphite coating ensures continuous lubrication, a relatively low coefficient of friction, thermal insulation, and chemical compatibility, as well as tool steel and billet. Consider the compounds, such as boron nitride.
For cutting tool steel, liquids (oils) and dry film lubricants generally work best. And their proportions are generally multidimensional: heat removal (in particular, water-miscible liquids), to reduce adhesive wear, by reducing the coefficient of friction, washing away loose metal particles, and inhibition of corrosion.
In the form of tool steel applications, such as disk-(tin), annoying is the primary problem. Additional requirements for the Graphite lubricant, for example by reducing both abrasive wear and corrosive chemicals. Mild forms require only a low molecular weight mineral oil or soap against wear. More extreme conditions require a solid film soaps, excessive wear. In some cases, the dry film lubricants, such as polyethylene (PE), Teflon or polytetrafluoroethylene (PTFE), which are used in the form of coatings or powders can provide an excellent way to prevent adhesive wear.