Effects of Ultrasonic-Aided Quenching on the Corrosion Resistance of GB 35CrMoV Steel in Seawater Environment

Jiang, Xin; Zhou, Yajun; Chen, Shi; Mao, Daheng

doi:10.3390/met8020104

Cited by 10 publications

(10 citation statements)

References 16 publications

(23 reference statements)

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“…Reference material used in this investigation was commercial GB 35CrMoV steel, which is a mid-carbon steel commonly used in the industry due to its high fatigue limit, high static strength and good creep strength. Thus, it is widely used in the production parts, such as main shafts, crankshafts, gears and turbine impellers [19][20][21][22]. Excellent wear resistance is necessary for smooth operation and long service life of parts.…”

Section: Methodsmentioning

confidence: 99%

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Yao

Zhou

2018

Metals

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Wear resistance of metallic materials can be effectively improved by the deep cryogenic treatment. In this study, different deep cryogenic treatment conditions were considered, with different soaking durations between quenching and tempering. The main objective is investigating the effects of deep cryogenic treatment and exploring the relationship between the mechanical properties and the microstructure of GB 35CrMoV steel. Hardness and relative wear ratios of samples were evaluated by the Vickers-hardness test and the pin-on-disk wear test, respectively. Worn surface was characterized by a non-contact optical surface profiler. Microstructures were studied by scanning electron microscope (SEM) and X-ray diffraction (XRD). Significant improvements in hardness and wear resistance are observed for higher cryogenic soaking times; the root mean square deviation (RMS) parameter (Sq) was employed to evaluate the effect of deep cryogenic treatment on the worn surface roughness; the improvements were ascribed to the precipitated carbides. The mechanism can be interpreted not only as the promoted effect of deep cryogenic treatment in the decomposition kinetics of martensite, but also as the acceleration on the Ostwald ripening process.

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Section: Methodsmentioning

confidence: 99%

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Yao

Zhou

2018

Metals

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“…It can be easily seen from Figure 5a,b, that the polarization curves obtained at different strain rates and deformation temperatures are similar in morphology and the I corr displacement is obvious. There is no passivation and the anode region is an active dissolution of metal, which are the results of the characteristic adsorption of Cl − onto the surface of the specimen, preventing the formation of the passivation film [1]. In addition, the E corr shift of the polarization curve and obvious changes in the anode region can also be observed, where the anode region represents the dissolution of the matrix at high potential and the cathode region delegates the cathodic hydrogen evolution reaction associated with water reduction [12].…”

Section: Resultsmentioning

confidence: 99%

“…In general, the reactions in the second and third parts occur in the middle- and low-frequency regions of EIS, which are related to the corrosion resistance of the specimens. The corrosion resistance of the samples is evaluated by combining the corrosion product resistance R f with the charge transfer resistance R ct (R corr = R f + R ct ) [1,33,35,40]. Generally, the corrosion resistance enhances as R corr increases.…”

Section: Resultsmentioning

confidence: 99%

“…It is well-known that 35CrMoV steel is a high-quality steel with good hardenability, creep properties, high strength, and a high fatigue limit. It is generally used to manufacture gear, marine power equipment, advanced turbine blowers and impellers, compressor engines, and other important parts which operate under high stress [1]. Under certain conditions, such as high stress and complex marine conditions (especially for complex marine conditions with strong corrosiveness), Cl − has a strong penetrating power that can cause pitting corrosion of carbon steel and easy penetration of the surface defects.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Hot Deformation Process Parameters on Microstructure and Corrosion Behavior of 35CrMoV Steel

Yang

Zhou

et al. 2019

Materials

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Hot deformation experiments of as-cast 35CrMoV steel, with strain rates of 0.01 s−1 and 10 s−1, deformation temperatures of 850, 950, and 1050 °C, and an extreme deformation reaching 50%, were carried out using a Gleeble-3810 thermal simulator. Electrochemical corrosion experiments were conducted on the deformed specimens. The microstructure was observed by optical microscope (OM), and the corrosion morphology and corrosion products of the specimens were investigated by scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), confocal laser scanning microscopy (CLSM), and X-ray diffraction (XRD) techniques. The results show that the grain size increased gradually with an increase in the deformation temperature at the same strain rate, whereas the corrosion resistance deteriorated. At the same deformation temperature, the grain size becomes smaller as the strain rate increases, which enhances the corrosion resistance. This is mainly attributed to the fine grains, which can form more grain boundaries, increase the grain boundary area, and accelerate the formation of the inner rust layer at the beginning of corrosion. Moreover, fine grains can also refine the rust particles and enhance the bonding strength between the inner rust layer and the matrix. The denseness and stability of the inner rust layer increases as the corrosion process progresses, thereby improving corrosion resistance.

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“…As a type of mechanical energy, ultrasound is widely used in the field of material processing [10,11]. Wu et al [12] applied ultrasonic vibration to the tungsten electrode in PAW torch, and then acoustic energy field is exerted in the plasma arc.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ultrasonic Vibration on the Transport Coefficients in Plasma Arc Welding

Chen

2020

Metals

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In ultrasound assisted plasma arc welding (U-PAW), the exerted ultrasonic vibration on the tungsten electrode interacts with the plasma arc and changes its heat-pressure characteristics. It is of great significance to investigate the underlying interaction mechanism. In this study, the calculation method of transport coefficients in U-PAW is developed. Translational thermal conductivity (including electrons thermal conductivity and the thermal conductivity of heavy particles) and electrical conductivity are calculated by considering the second-order approximation of Maxwell velocity distribution function, while the method of Butler et al. is adopted to calculate the reaction thermal conductivity in U-PAW. The effective value of the ultrasound velocity gradient tensor is employed to describe the effects of ultrasonic vibration on transport coefficients in ultrasound assisted plasma arc. The calculation results show that when the ultrasound is applied, the thermal conductivity of heavy particles in the plasma increases significantly and the electron thermal conductivity increases within some extent. The thermal conductivity of the reaction also increased to a great extent, and the electrical conductivity decreases a little bit. Although the thermal diffusion coefficient also has some increase, but the ordinary diffusion coefficient is obviously reduced due to the application of the ultrasound. With the updated transport coefficients, the plasma arc pressure on the anode surface is numerically computed, and the predicted pressures of PAW and U-PAW can be consistent with the measured ones.

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Effects of Ultrasonic-Aided Quenching on the Corrosion Resistance of GB 35CrMoV Steel in Seawater Environment

Cited by 10 publications

References 16 publications

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Effect of Hot Deformation Process Parameters on Microstructure and Corrosion Behavior of 35CrMoV Steel

Effects of Ultrasonic Vibration on the Transport Coefficients in Plasma Arc Welding

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