Effect of Ultrasonic Flexural Vibration on Solidification Structure and Mechanical Properties of Large-Size 35CrMoV Cast Ingot

Chen, Shi; Li, Fan; Wu, Yongjun; Mao, Daheng

doi:10.1155/2019/3421039

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…It was found that compared to non-treated alloy, the properties obtained by inducing ultrasonic vibration and pressure resulted in tensile strength, yield strength and elongation of 268 MPa, 192 MPa and 17,1% respectively and also reduced the porosity while solidification. Shi et al, [4] investigated the effects of ultrasonic flexural vibration guided into 35CrMoV steel through an L-shaped guide during solidification on the microstructures, microstructures and mechanical properties of 35CrMoV cast ingot. It was found that the size of grains was smaller compared to the conventional one.…”

Section: Introductionmentioning

confidence: 99%

Effect of Vibration on Mechanical Properties in Sand Casting Process using Organic Binder

Shah Alam Bhuiyan,

Anayet U Patwari,

Wasib U Navid

et al. 2023

ARAM

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Casting setups must create the components with a short lead time in today's highly competitive world market. This essential industry now demands defect-free castings with low production costs. Rejection of casted products is caused due to defective components which are influenced by various factors which includes process parameters, all of which can be optimized to improve the quality of the casted products. In this study, an experimental approach was made using vibrated assisted techniques to assess the applicability of the method and improvement of the quality of the casted parts using organic binders in terms of mechanical properties especially the tensile strength, hardness and micro-structure of the products. After investigations, it has been observed that with the influence of vibration frequency at 40 Hz with amplitude 2 V the tensile strength has been improved from 176.60 MPa to 180.81 MPa, hardness improvement from HB33 to HB36 and uniformity in the micro-structure has been observed.

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Section: Introductionmentioning

confidence: 99%

Effect of Vibration on Mechanical Properties in Sand Casting Process using Organic Binder

Shah Alam Bhuiyan,

Anayet U Patwari,

Wasib U Navid

et al. 2023

ARAM

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“…Because of its good hardenability, creep properties and high strength, 35CrMoV steel is mainly used to manufacture various small and medium-sized parts [1,2]. However, its poor tribological performance limits its application as an important tribological moving component [3,4].…”

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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“…The online ultrasonic purification of flow tank melt can solve the problem of poor purification effect of large volume melt, but the traditional straight rod type ultrasonic waveguide rod mainly exports the longitudinal vibration along the axial direction, and the vibration exported along the radial direction (flow direction of launder melt) is very little, which is not conducive to the effective purification of launder melt. In this study, an L-type high-temperature resistant ultrasonic waveguide rod [ 21 , 22 , 23 , 24 ] was developed to introduce ultrasonic bending vibration into the melt of 7085 aluminum alloy in the semi-continuous casting process to enhance the high-frequency vibration output along the flow direction of the melt in the launder, and an experimental study of ultrasonic bending vibration-assisted online purification of the melt of 7085 aluminum alloy was conducted.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Bending Vibration-Assisted Purification Experimental Study of 7085 Aluminum Alloy Melt

Chen

Liao

et al. 2022

Materials

Self Cite

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Aiming at the problem that melt inclusions in the casting process of 7085 aluminum alloy seriously affect the ingot quality, this study introduces ultrasonic bending vibration into the melt of the launder in the semi-continuous casting process of 7085 aluminum alloy and investigates the online purification effect of ultrasonic bending vibration on the melt of 7085 aluminum alloy through a metallographic analysis, SEM analysis, and EDS energy spectrum analysis. The results show that, under the action of the ultrasonic, the inclusions in the aluminum melt are transformed from a large number of elongated large inclusions with a size of more than 50 μm, and granular inclusions with a size of about 5–15 μm, into a small amount of smaller than 30 μm point-like small inclusions. In addition, the average area ratio of inclusions in the melted sample was reduced from 3.835 (±0.05)% to 0.458 (±0.05)%, and the residual refining agent in the aluminum melt was effectively removed. It was also found that under the action of ultrasonic bending vibration, the tiny inclusions in the melt aggregate with each other, and interact with the residual refining agent in the melt to further grow, and are attached to the inner surface of the ceramic cavity channel to be removed.

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Effect of Ultrasonic Flexural Vibration on Solidification Structure and Mechanical Properties of Large-Size 35CrMoV Cast Ingot

Cited by 4 publications

References 13 publications

Effect of Vibration on Mechanical Properties in Sand Casting Process using Organic Binder

Effect of Vibration on Mechanical Properties in Sand Casting Process using Organic Binder

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

Ultrasonic Bending Vibration-Assisted Purification Experimental Study of 7085 Aluminum Alloy Melt

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