The effect of CaF2 and BaF2 solid lubricants on wear resistance of laserborided 100CrMnSi6-4 bearing steel
Journal Title: Archives of Materials Science and Engineering - Year 2017, Vol 1, Issue 86
Abstract
Purpose: In this paper, laser alloying with boron and solid lubricants was used in order to produce the self-lubricating layer on 100CrMnSi6-4 bearing steel. The influence of CaF2 and BaF2 on microstructure, hardness, chemical and phase composition as well as wear resistance of the layers was studied. Design/methodology/approach: The two-step process was used during laser alloying. First, the surface of the specimen was coated by a paste with alloying material. The alloying material consisted of the mixture of amorphous boron and self-lubricating additions (CaF2 and BaF2). Next, the surface was re-melted by a laser beam using TRUMPF TLF 2600 Turbo CO2 laser. The laser beam power 1.43 kW was used for laser alloying. The layer was characterized using X-ray diffraction, Scanning Electron Microscopy, Energy Dispersive Spectroscopy, microhardness tester. The dry sliding wear behaviour of the layer was investigated using the Amsler type wear test. Findings: The tribofilm, consisting of solid lubricants, was observed on the worn surfaces of laser-alloyed layers. It caused an increase in the wear resistance at room temperature. The presence of calcium fluoride and barium fluoride was confirmed in laser-alloyed layers using XRD and X-ray microanalysis by EDS method. Practical implications: Laser surface modification with solid lubricants had the important cognitive significance and gives grounds to the practical employment of this technology for reducing the abrasive wear. Originality/value: The wear mechanism of surface layer with solid lubricants was determined. The produced layer with laser alloying layers of boron and solid lubricant (CaF2 or BaF2) was compared.
Authors and Affiliations
A. Piasecki, M. Kotkowiak
Keywords
Related Articles
- EP ID EP223698
- DOI 10.5604/01.3001.0010.4869
- Views 84
- Downloads 0
Density of tin, silver and copper
Purpose: Purpose of this paper is to report on the development of a new density measure- ment cell. Design/methodology/approach: Measurement cell based on Archimedean principle and consisting of induction furnace and a...
The influence of the parameters of heat treatment on the mechanical properties of welded joints
Purpose: The main goal of the work is to determine the influence of the parameters of stress relief annealing on the mechanical and structural properties of welded joints made of chromium-molybdenum type 10CrMo9-10 steel...
Influence of plastic deformation temperature on the structure and mechanical properties of low-alloy copper alloys with Co, Ni and B
Purpose: This work presents the influence of chemical composition and plastic deformation temperature of CuCoNi and CuCoNiB as well as CuCo2 and CuCo2B alloys on the structure, mechanical properties and, especially on th...
Chromous capacities of ferrochromium and matte smelting slags
Purpose: of this paper is to extend the slag capacity concept to sparingly soluble cationic species encountered for example in matte smelting and ferrochromium processing in terms of chromous capacities. Design/methodolo...
CFD analysis of aerofoil using dimples and prevent radar signals using stealth technology
Purpose: The main objective of aircraft aerodynamics is to enhance the aerodynamiccharacteristics and maneuverability of the aircraft. This enhancement includes the reductionin drag and stall phenomenon. The airfoil whic...