Research into water-based colloidal-graphite lubricants for forging of carbon steels and Ni-based alloys

Abstract

The presented paper describes the topical problem in metal forging production. It deals with the choice of an optimal lubricant for forging of carbon steels and Ni-based alloys. Within the scope of the paper, the properties of several water-based colloidal-graphite lubricants were investigated. The physicochemical and technological properties of these lubricants are presented. It was found that physicochemical properties of lubricant compositions have an influence on friction coefficient value and as a result on die life during forging process. The ring compression method was used to estimate the friction coefficient value. Both mechanical press and screw press were used for the test. The comparative analysis of the investigated lubricants was carried out. The die life was estimated on the basis of statistics obtained with the help of an automated forging line. The practical recommendations were given to choose an optimal water-based colloidal-graphite lubricant for forging of carbon steel or Ni-based alloy.

Thermochemical Stability and Friction Properties of Soft Organosilica Networks for Solid Lubrication

“…Polysiloxanes with phenyl substituents have shown higher load capacity of the oil, a parameter related to the ability of the lubricant to prevent or reduce wear [ 14 ]. Other examples of lubricants used in high temperature processes are aqueous suspensions of graphite [ 15 ], polytetrafluoroethylene [ 16 ] and molybdenum sulfide [ 17 ]. Their lubrication mechanism is similar to that of silicon oil, involving the sliding of molecules or platelets when a shear force is applied [ 18 ].…”

Tuning the Structure and Ionic Interactions in a Thermochemically Stable Hybrid Layered Titanate‐Based Nanocomposite for High Temperature Solid Lubrication

“…Similarly, layered ceramics can undergo plastic deformation when a shear force is applied parallel to the planes, which is at the basis of the application of such ceramics as solid lubricants . Nowadays, graphite is extensively used in industry for lubrication purposes in a wide range of temperatures, due to its relatively high thermal stability, decomposing in air above 700 °C . The layers are held together by weak van der Waals forces, thus the layers can easily slide over each other .…”

Hybrid n-Alkylamine Intercalated Layered Titanates for Solid Lubrication

“…12 Nowadays, graphite is extensively used in industry for lubrication purposes over a wide range of temperatures. 13 Graphite has a relatively high thermal stability, decomposing in air above 700 °C. Never-theless, there are some problems related to its use, for instance, the formation of a dirty working environment and pitting corrosion on metal surfaces due to its electrical conductivity.…”

“…The layers can easily slide over each other when a shear force is applied . Nowadays, graphite is extensively used in industry for lubrication purposes over a wide range of temperatures . Graphite has a relatively high thermal stability, decomposing in air above 700 °C.…”