Fig. 1. Laser cladding and tensile specimen. (a) Experimental equipment; (b) laser cladding process;(c) schematic of sectioned tensile specimens; (d) geometry of tensile specimen

Fig. 2. Schaeffler diagram of cladding layer and XRD spectra of laser cladding layers in different states.(a) Schaeffler diagram; (b) XRD spectra of specimens in different states

Fig. 3. Microhardness distribution curves of specimens in different states

Fig. 4. Tensile curves and fracture morphologies of specimens of laser cladding layers in different states. (a) Tensile curves; (b) fracture morphology of as-cladded specimen; (c) fracture morphology of as-tempered (100 ℃) specimen; (d) fracture morphology of as-tempered (200 ℃) specimen; (e) fracture morphology of as-tempered (400 ℃) specimen; (f) fracture morphology of as-tempered (600 ℃) specimen

Fig. 5. SEM images of specimens of laser cladding layers in different states. (a) As-cladded; (b) as-tempered (400 ℃)

Fig. 6. TEM analysis of as-cladded specimen and as-tempered specimen at 400 ℃. (a) Bright field image and selected area electron diffraction (SAED) of as-cladded specimen; (b) dark field image and SAED of austenite in as-cladded specimen; (c) dark field image and SAED of M₂₃C₆ carbide in as-cladded specimen; (d) bright field image and SAED of as-tempered (400 ℃) specimen; (e) dark field image and SAED of austenite in as-tempered (400 ℃) specimen; (f) dark field image and SAE

Fig. 7. Polarization curves of different specimens