Fabrication of Microalloy Nitrided Layer on Low Carbon Steel by Nitriding Combined with Surface Nano-Alloying Pretreatment

Sun, Jian; Yao, Quantong

doi:10.3390/coatings6040063

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…A commercially available AISI 5140 steel with a chemical composition (wt.%) of 0.40 C, 0.23 Si, 0.7 Mn, 0.8 Cr, 0.03 Ni and Fe in balance was selected as the raw material. The raw material was cut into rectangular specimens with a gauge dimension of 20 × 15 × 3 mm 3 for DGPSA treatment (LDMC-10A, Ande Heat Treatment Technology Co., Ltd, Wuhan, China). A commercial Cr-Mo (50 wt.% Cr and 50 wt.% Mo) plate having a size of 55 × 50 × 3 mm 3 was selected as the source electrode for supplying alloying elements.…”

Section: Methodsmentioning

confidence: 99%

“…AISI 5140 steel is widely used as gear and bearing material due to its excellent comprehensive properties (good strength and toughness) [1]. However, in most cases, its hardness and corrosion resistance cannot meet the requirements of gears [2,3]. Surface strengthening methods such as carburizing [4,5], nitriding [6,7], and carbonitriding [8,9] are commonly used to improve the performance of the steel surface.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Heating Treatment on the Microstructure and Properties of Cr–Mo Duplex-Alloyed Coating Prepared by Double Glow Plasma Surface Alloying

Wang

Jiang

et al. 2019

Coatings

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In this study, Cr–Mo duplex-alloyed coating was prepared on carbon steel by double glow plasma surface alloying (DGPSA). The effect of annealing and quenching and tempering (Q&T) treatments on the microstructure and performance of the coating was investigated by X-ray diffraction (XRD), energy dispersive spectrometry (EDS), backscattering electron imaging (BSEI) and electron backscattering diffraction (EBSD) techniques. The results show that a gradient structured coating composed of an Fe–Cr–Mo solid solution (Fe–Cr–Mo SS) layer and an alloyed pearlite layer was obtained on the steel surface. The affected layer was adjacent to the coating. After annealing or Q&T, more carbides precipitated in the Fe–Cr–Mo SS layer and alloyed pearlite layer. Most of the C atoms in the subsurface were dragged into the coating to form carbides in the Fe–Cr–Mo SS and alloyed pearlite layers of the coating, transforming the affected layers into a carbon-poor zone. Annealing and Q&T hardly modified the thickness of the coating, but greatly changed the hardness and corrosion resistance of the coating. The Q&T treated samples had higher hardness and better corrosion resistance than the as-DGPSA treated and the annealed samples.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Heating Treatment on the Microstructure and Properties of Cr–Mo Duplex-Alloyed Coating Prepared by Double Glow Plasma Surface Alloying

Wang

Jiang

et al. 2019

Coatings

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show abstract

“…Therefore, the formation of an nc layer on the surface of LCSs is an effective method to enhance the atomic diffusion kinetics. For example, Sun et al fabricated a micro-alloy nitrided layer on an LCS by nitriding combined with a surface nano-alloying pretreatment [17]. P. Magudapathy et al studied the alloying of metal nanoparticles by ion-beam-induced sputtering [18].…”

Section: Introductionmentioning

confidence: 99%

Surface nano-alloying treatment of low carbon steel

Fu¹,

Gao²,

Pang³

et al. 2020

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A nano-structured alloying layer was fabricated by the addition of 304 stainless steel powder to the surface of a low carbon steel (LCS) plate by surface mechanical attrition treatment (SMAT). The coverage of the stainless steel layer was 93 % after SMAT for 60 min. The thickness of the surface layer was approximately 35 µm. The average grain size in the top layer was in the range of 55-65 nm with random crystallographic orientation, and the grain size increased with increasing depth from the treated surface. Both the surface hardness and wear resistance of the sample that underwent a surface nano-alloying treatment (SNAT) increased compared with those of the LCS sample. Additionally, the wear resistance increased for the nanocrystalline (nc) surface layer. Nanoindentation measurements indicated that micro-hardness in the nc surface layer was approximately 645 HV, which was three times as high as that of the LCS matrix.

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Effects of aluminum content and mechanical nano‐alloying time on the preparation of titanium‐aluminum composite coatings on magnesium‐lithium alloy

Sun

Zhu

et al. 2020

Materialwissenschaft Werkst

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A titanium‐aluminum composite coating was successfully fabricated on magnesium‐lithium alloy substrate by mechanical nano‐alloying treatment (SMNAT). The effects of aluminum content and mechanical nano‐alloying time on the microstructure and properties of titanium‐aluminum composite coatings were investigated. The experimental results showed that the ratio of titanium‐aluminum powder has a significant effect on the preparation of the coating. Low aluminum content and high aluminum content in the mixture powder resulted in the formation of the coatings with inhomogeneous thickness. The titanium‐aluminum ratio of 3 : 1 was considered to be optimal for fabricating the coating with homogeneous thickness under the selected milling parameters. The hardness of top surface layer on titanium‐ aluminum coatings decreased from 292.0 HV 0.01 to 121.4 HV 0.01 with the increase of aluminum content. Additionally, the prolongation of treatment time facilitated to increase the thickness and density of the coatings, resulting to enhance their hardness and corrosion resistance.

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Fabrication of Microalloy Nitrided Layer on Low Carbon Steel by Nitriding Combined with Surface Nano-Alloying Pretreatment

Cited by 5 publications

References 21 publications

Effect of Heating Treatment on the Microstructure and Properties of Cr–Mo Duplex-Alloyed Coating Prepared by Double Glow Plasma Surface Alloying

Effect of Heating Treatment on the Microstructure and Properties of Cr–Mo Duplex-Alloyed Coating Prepared by Double Glow Plasma Surface Alloying

Surface nano-alloying treatment of low carbon steel

Effects of aluminum content and mechanical nano‐alloying time on the preparation of titanium‐aluminum composite coatings on magnesium‐lithium alloy

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