Effect of sliding speed on wear behaviour of nitrided martensitic stainless steel under boric acid and MoS₂ lubrication

Abstract

Sliding counter bodies frequently undergo boundary lubrication at lubricant starved areas with dominated surface interaction under dry sliding condition. The effect of sliding speed (1?0-2?5 m s 21 ) on the friction and wear performance of nitrided martensitic stainless steel in the presence of dry lubricants like boric acid and MoS 2 has been investigated, and the results are presented in this work. Under dry condition, wear loss increases and friction coefficient decreases with sliding speeds. The lubricant coated samples show minimal wear loss at all sliding speeds (2?5 m s 21 ). The friction coefficient shows a decreasing trend for the MoS 2 coated sample, while the boric acid coated sample shows an increasing trend. This is possibly due to the temperature induced conversion of boric acid to boric oxide. The fine debris mixture formed during sliding may also pin the lamellar shearing of solid lubricants to increase friction.

Preparation, tribological behaviour and lubrication performances of nano‐CaWO4:Eu3+ as EP additive in water‐soluble fluid for laminated copper cladding steel sheet during cold rolling

“…1,2 Along with rapid development of lubricant containing nanoparticles as extreme pressure (EP) additives, which have shown excellent tribological properties and have broad application prospects in the field of rolling lubrication. 3 In recent years, MoS 2 , 4 SiO 2 , 1 Mn 3 B 7 O 13 Cl, 5 Cu 6 and ZnWO 4 7 as superior wear-resistance and frictionreducing additives were used in the process of metal working lubrication. Compared with others types of lubricants, the water-soluble fluids have better cooling performance and lower environmental pollution, so it has been widely used in metal rolling.…”

The anti-wear enhancement of boric acid + molybdenum disulfide derived tribofilm

“…In this study, anti-wear and friction reduction of boric acid (H 3 BO 3 ) þ MoS 2 tribofilm were investigated to be a possible antiwear additive in the light of surface energy, tribochemical formations and its synergetic effect on friction and wear which is very scant in the literature where MoS 2 and H 3 BO 3 only compared with each other. [32][33][34] H 3 BO 3 þ MoS 2 mixtures in mineral base oil tested with a tribometer against ZDDP, H 3 BO 3 , and MoS 2 base oil mixture in the 12541 bare steel and American Iron and Steel Institute (AISI) 52100 steel ball tribological system. The friction coefficient and wear rates were evaluated via a tribometer and optical profilometer analysis.…”

Effect of surface textures on friction properties of Al2O3/TiC ceramics

“…[5][6][7][8][9][10][11][12] Surface texturing has been used for friction and wear reduction applications such as piston rings, piston pins, hydrodynamic bearings, seal rings and cutting tools. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] This improvement in tribological properties of the textured surfaces is attributed to several physical mechanisms such as wear debris entrapment, storage of solid lubricants, local increase of lubricant supply by fluid reservoir creation and increase in load carrying capacity by a hydrodynamic effect. In the author's previous study, [17][18] microholes were made using microelectrical discharge machining on the rake or the flank face of the carbide tools, and MoS 2 solid lubricants were filled into the microholes to form the self-lubricated tools.…”