Microscopic Characteristics and Properties of Fe-Based Amorphous Alloy Compound Reinforced WC-Co-Based Coating via Plasma Spray Welding

Abstract

Plasma spray welding, as one of the material surface strengthening techniques, has the advantages of low alloy material consumption, high mechanical properties and good coating compactness. Here, the Co alloy, WC and Fe-based amorphous alloy composite coating is prepared by the plasma spray welding method, and the coating characteristics are investigated. The results indicate that the coatings have a full metallurgical bond in the coating/substrate interface, and the powder composition influences the microstructures and properties of the coating. The hardness of coatings increases with the mass fraction of the Fe-based amorphous alloy. The spray welding layer has a much higher wear resistance compared with the carbon steel, and the Fe-20 exhibits a superior wear resistance when compared to others. The results indicate that the amorphous alloy powders are an effective additive to prepare the coating by plasma spray welding for improving the wear resistance of the coating.

Determination of abrasion resistance of Fe28Cr5C1Mn coating applied to 30MnB5 boron alloy cultivator blades via electric arc spray

“…Figure 7(b) represents the XRD graph of the surface coated with Fe28Cr5C1Mn. The X-ray tests of the coatedshows that the morphology is predominantly (atomic 90%) metal-based Fe-Cr solid solution, similar to the findings in the literature 25,31,[51][52][53]. In addition to Fe, Cr, C, and Mn, it is prominent from the XRD test in Figure7(b) that FeC, Fe 2 C, Fe 3 C, Fe 5 C 2 , Fe 7 C 3 , Fe 19 Mn, Fe 1.8 Mn 1.2 C, CrC, Cr 3 C, Cr 3 C 2 , Cr 7 C 3 , Cr 23 C 6 , CrFe 4 , (Cr, Fe) 7 C 3 , Mn 3 C, Mn 23 C 6 , Mn 7 C 3 , Mn 1.8 Fe 1.2 C, Mn 5 C 2 , and CrFe 4 are formed in metastable sub-stoichiometric carbide structures called Fe and Cr alloy phases and the Mn-phase (M x C; here M: metal).…”

“…This has extensively developed the wear, hardness, and other mechanical behaviors of the arc spray coating surface, as noted in previous studies. 52,68 Although harsher elements fractured the carbide phases; the primary carbides in the coating matrix imparted high wear strength. This feature provided the Fe28Cr5C1Mn coated sample to wear less than the 30MnB5 steel sample.…”

“…shows that the morphology is predominantly (atomic 90%) metal-based Fe-Cr solid solution, similar to the findings in the literature. 25,31,[51][52][53] In addition to Fe, Cr, C, and Mn, it is prominent from the XRD test in Figure 7(b) that FeC, Fe 2 C, Fe 3 C, Fe 5 C 2 , Fe 7 C 3 , Fe 19 Mn, Fe 1.8 Mn 1.2 C, CrC, Cr 3 C, Cr 3 C 2 , Cr 7 C 3 , Cr 23 C 6 , CrFe 4 , (Cr, Fe) 7 C 3 , Mn 3 C, Mn 23 C 6 , Mn 7 C 3 , Mn 1.8 Fe 1.2 C, Mn 5 C 2 , and CrFe 4 are formed in metastable sub-stoichiometric carbide structures called Fe and Cr alloy phases and the Mn-phase (M x C; here M: metal). The elements Fe, Cr, and Mn can easily form these carbides, as they have a strong affinity for element C. This can be seen in the secondary peaks associated with oxidized structures.…”

Research on microstructure and properties of 3D plasma spray welding repair layer of continuous casting segmented rollers

“…The wear surface of the spray welding layer also exhibited slight abrasive wear characteristics. Xu et al [12] chose WC, Co, and Fe-based alloy composite powders and enhanced coatings were prepared on the surface of 42CrMo steel using the plasma spray welding method. The hardness of the coating increased with the the mass fraction of Fe-based amorphous alloy.…”

Special Issue on “Advances in Plasma Diagnostics and Applications”

“…Xu et al deposited an Fe-based amorphous alloy, reinforced WC-Co-based coating, on 42CrMo steel, using plasma spray welding [4]. The coatings have a full metallurgical bond in the coating/substrate interface and the powder composition plays an important role in the micro-structures and properties of the coating.…”