Influence of various heat treatment stages on evolution of microstructure and grain in H407 steel

Sun, Jianyun; Ji, Kai; Jiang, Chen Wei; Zhang, Yun Chang

doi:10.1007/s12540-016-6038-1

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…The results showed the crystalline grains of the coating are smaller after heat treatment for austenite and lath martensite grains, which are helpful in improving the hardness. Sun et al [15] studied the microstructure conversion and grain size development in various stages of heat treatment. Meanwhile, magnitude, shape, and distribution in the secondary phase during heat treatment were investigated to explore the function mechanism of micro-alloyed elements on the evolution of microstructure and grain during heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Improving Microstructures and Wear Properties of Ni60 Coating by Heat Treatment

Wang

Zhang

et al. 2022

Metals

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Ni60 self-lubricated anti-wear composite coatings were successfully precipitated on the 35CrMoV substrate by laser cladding technology. The effects of heat treatment on the macro-morphology, microstructure, precipitated phase, microhardness, and wear properties of the composite coatings with different heat treatment temperatures (25 °C, 500 °C, 600 °C, and 700 °C for 1 h) were investigated systemically. The macro-morphology, microstructure, precipitated phases, and elements distribution of laser cladding layers were detected by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS), respectively. The mechanical and tribological properties of the cladding layers were tested using a microscopic Vickers hardness tester and friction and wear tester, respectively. The results show that the main phases of Ni60 coatings are composed of γ-(Ni, Fe), Cr7C3, Cr23C6, CrB, CrFeB, and Cr2Ni3. In particular, the micro-structure and mechanical properties reach the best levels after heat treatment at 600 °C. The micro-hardness, average friction coefficient, and wear volume of the cladding layer are 771.4 to 915.8 HV1 and 0.434 and 2.9546 × 10−5 mm3, respectively. In conclusion, the micro-structure and mechanical properties of the cladding layer are greatly improved by the proper heat treatment temperature.

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Section: Introductionmentioning

confidence: 99%

Simultaneously Improving Microstructures and Wear Properties of Ni60 Coating by Heat Treatment

Wang

Zhang

et al. 2022

Metals

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“…The experiment showed that the grain size of the thermal treatment scheme is small, and the austenite and lath martensite grains are obvious, which is beneficial to improve the hardness. Sun et al [16] studied the microstructure transformation and grain size change in different thermal treatment stages. In the meantime, the size, shape and distribution of secondary phases during thermal treatment were studied, and the mechanism of microalloying elements on the microstructure and grain evolution during thermal treatment was discussed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Thermal Treatment on Microstructure and Wear Properties of Ni60/CeO2 Composite Coating 35CrMoV Steel by Laser Cladding

Bai

et al. 2022

Coatings

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Laser cladding Ni60/2.0 wt.%CeO2 self-lubricating anti-wear composite coatings on 35CrMoV steel were thermally treated at 25 °C, 500 °C, 600 °C and 700 °C for 1 h, respectively. The macroscopic morphology of composite coatings was characterized by optical microscopy. The evolution of microstructure was studied by scanning electron microscopy. The precipitated phase of the coating was analyzed by X-ray diffractometer. The microhardness and wear properties of the composite coatings were measured by microhardness tester and friction and wear test. The effects of thermal treatment and no thermal treatment on the mechanical properties of the composite coatings were systematically studied by the above experiments. The experimental analysis shows that the main phase composition of Ni60/2.0 wt.%CeO2 composite coating is γ-(Ni, Fe), Cr7C3, Cr23C6, CrB, CrFeB and Cr2Ni3. Meanwhile, in XRD, it can be seen that the diffraction peak has shifted to the left and the single diffraction peak is decomposed into double diffraction peaks with the thermal treatment at 700 °C, which indicates that the lattice in the coating phase has a certain distortion. Compared with the coatings without thermal treatment, Ni60 cladding layer has more uniform solute distribution and a denser and more uniform structure after thermal treatment at 700 °C. The laser cladding anti-wear composite coating demonstrates that the wear resistance performance shows the greatest improvement after thermal treatment at 700 °C.

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A Study of Thermal Cyclic Softening Behavior of Hot-Deformed Die Steel

Sun

Sha

et al. 2021

Met Sci Heat Treat

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Influence of various heat treatment stages on evolution of microstructure and grain in H407 steel

Cited by 4 publications

References 19 publications

Simultaneously Improving Microstructures and Wear Properties of Ni60 Coating by Heat Treatment

Simultaneously Improving Microstructures and Wear Properties of Ni60 Coating by Heat Treatment

Effects of Thermal Treatment on Microstructure and Wear Properties of Ni60/CeO2 Composite Coating 35CrMoV Steel by Laser Cladding

A Study of Thermal Cyclic Softening Behavior of Hot-Deformed Die Steel

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