this paper deals with the investigation of the microstructure and hardness of steel samples cladded with satellite 6-wc composites by using gas tungsten arc welding (gtaw) process. for this purpose, steel samples were coated with unreinforced and reinforced stellite (by 20, 30 and 40 wt.% wc). the cladded samples were evaluated by metallographic studies, microhardness measurement and x-ray diff...

In order to improve the wear properties of FeCoCrNi high entropy alloy (HEA), laser cladding was applied fabricate FeCoCrNiAlx HEA coatings with different Al additions. The Al-modified exhibited excellent metallurgical bonding interfaces substrates. microstructure FeCoCrNiAl0.5 coating same as coating: face-centered cubic (FCC). However, FeCoCrNiAl different: body-centered (BCC) more atoms dist...

Ni-WC composite coatings on 35CrMoV alloy surface were successfully prepared by mechanical vibration field-assisted laser cladding technology. Optical microscopy (OM) and scanning electron (SEM) used to study the microstructure of without at different frequencies; phase composition layer was studied X-ray diffraction (XRD); an energy dispersive spectrometer (EDS) for elemental plane analysis. T...

Cr-Ni coatings with the mass ratios of 17% Cr-83% Ni, 20% Cr-80% Ni and 24% Cr-76% Ni were fabricated on H13 hot work mould steel using a laser cladding (LC). The surface-interface morphologies, chemical elements, surface roughness and phase composition of the obtained Cr-Ni coatings were analysed using a scanning electron microscope (SEM), energy disperse spectroscopy (EDS), atomic force micro...

In order to improve the high temperature oxidation and ablation resistance of C/C composites, ZrB2-ZrC-SiC ultra-high composite ceramic coatings were prepared on composites by laser cladding using Zr, B4C, Si as raw materials. The microstructure coating was characterized scanning electron microscopy (SEM) X-ray diffraction (XRD). Air isothermal (1600 °C, 80 min) oxyacetylene flame (2400 kW/m2, ...

Abstract Laser cladding technology is an advanced material surface modification technology, which has the advantages of good combination coating and substrate, environmental protection process. In this paper, for laser AlCrCuFeNi2 high-entropy alloy coatings, effects different powers scanning speeds on temperature velocity fields were analyzed by numerical simulation. early stage process, heat ...

To improve the surface properties of 5083 aluminum, Al0.8FeCrCoNiCu0.5Yx (x = 0, 0.05, 0.1, and 0.2) high-entropy alloy coatings were prepared by laser cladding. The phase structure microstructure characterized XRD SEM. tribological coating tested a friction wear tester. An electrochemical workstation corrosion resistance coating. results show that when Y content is less than 0.2, in FCC1, BCC1...

Known as having a stress self-accommodation characteristic, the laser cladding shape memory alloy (SMA) coatings have been widely used in material failure repair. Nevertheless, their further development is greatly limited by low microhardness (250 HV0.2) and corrosion resistance. Benefiting from capability of refined grain adjusted microstructure, rare earth oxides play key role improving prope...

When laser cladding is used to repair parts, the interaction of parameters has a significant influence on equipment performance. In order explore process and quality Ni60PTA coating, statistical relationship between (laser power, scanning speed, powder feeding rate) responses (dilution ratio, ratio layer width height, contact angle) was established by experiments using response surface method (...