首页|Enhancing the wear resistance of a cemented carbide/titanium alloy under magnetofluid lubrication via the magnetic response
Enhancing the wear resistance of a cemented carbide/titanium alloy under magnetofluid lubrication via the magnetic response
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NSTL
Elsevier
Pulsed magnetic field treatment (MT) was applied to cemented carbide (WC-12Co) for enhancing its wear resistance in contact titanium alloy (TC4). Based on the magnetic response after MT, ferromagnetic Ni and Fe_3O_4 nanoparticles and nonferromagnetic Cu were selected as additives to prepare lubricating fluids. The results reveal that the wear resistance of the cemented carbide/titanium alloy contact under cutting fluid lubrication was improved by MT. Significantly, the wear resistance was further enhanced by coupling of MT and Fe_3O_4 magnetofluid. The workpiece wear volume of coupling decreased by 33.9%, and the ball wear scar decreased by 36.4% compared with that of the untreated ball in cutting fluid lubricant. The enhanced wear resistance comes from the magnetic response of Fe_3O_4 to the treated magnetic ball (remanence) and improved hardness. The adsorption of Fe_3O_4 nanoparticles onto the treated magnetic ball reduces the adhesion of TC4 and forms a titanium alloy film containing Fe_3O_4 nanoparticles. In addition, increased hardness due to magnetostriction and magnetic domain enlargement during pulsed magnetization also contributes to the enhanced wear resistance.
Cemented carbideMagnetic responsePulsed magnetic fieldMagnetofluid
NSTL
Elsevier
