Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Zhu, Hongmei; Li, Yongzuo; Li, Baichun; Zhang, Zhenyuan; Qiu, Changjun

doi:10.3390/coatings8120451

Cited by 22 publications

(8 citation statements)

References 19 publications

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“…Therefore, the increasing portion of F accounts for the reduction in the microhardness and strength, but the enhancement in the toughness of the specimens with higher V addition, consistent with the previous study [28]. Table 2 lists the data of the Rm, Re, and elongation of the laser-cladded MSS coatings with and without V addition developed in this study, and is compared with other Fe-based MSS coatings prepared by the laser cladding technique from the literature [8,21,25,[29][30][31]. It can be apparently concluded that the 0.5%V-bearing MSS coating achieved in this work exhibits a striking combination of high strength and high ductility.…”

Section: Mechanical Propertiessupporting

confidence: 83%

“…The reasons accounting for the microhardness and tensile strength change of the specimens could be associated with the following factors: On the one hand, the formation of the refined martensite, nano-sized precipitates VN and Cr 23 C 6 can generate fine-grain strengthening and second-phase strengthening effects, which significantly enhances the microhardness and tensile strength [3,8,25]. On the other hand, the ferrite stabilizer element V can promote the F phase formation [17].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating

Zhu

et al. 2020

Materials

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Martensitic stainless steel (MSS) coatings with different vanadium (V) contents (0–1.0 wt%) by microalloying have been successfully fabricated utilizing a unique laser cladding technique. The microstructure and properties of the resulting MSS coatings, with and without element V addition, have been carefully investigated by various advanced techniques, including XRD, SEM, TEM, microhardness tester, universal material testing machine, and electrochemical workstation. It was found that the V-free coating was mainly composed of martensite (M) and ferrite (F), trace M23C6 and M2N, while the V-bearing coatings consisted of M, F, M23C6, and VN nano-precipitates, and their number density increased with the increase of V content. The V microalloying can produce a significant impact on the mechanical properties of the resulting MSS laser-cladded specimens. As the V content increased, the elongation of the specimen increased, while the tensile strength and microhardness increased firstly and then decreased. Specifically, the striking comprehensive performance can be optimized by microalloying 0.5 wt% V in the MSS coating, with microhardness, tensile strength, yield strength, and elongation of 500.1 HV, 1756 MPa, 1375 MPa, and 11.9%, respectively. However, the corrosion resistance of the specimens decreased successively with increasing V content. The microstructure mechanisms accounting for the property changes have been discussed in detail.

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Section: Mechanical Propertiessupporting

confidence: 83%

Section: Mechanical Propertiesmentioning

confidence: 99%

Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating

Zhu

et al. 2020

Materials

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“…They showed that high-quality coatings with high hardness (over 60 HRC) and wear resistance can be produced. Zhu et al demonstrated the beneficial effect of Low-Temperature Tempering on the microstructure and properties of martensitic stainless steel coatings produced by laser cladding [32]. They proved that the post-treatment leads to martensite decomposition into finer tempered martensite with precipitations of numerous nano-sized Fe 3 C carbides [32].…”

mentioning

confidence: 99%

“…Zhu et al demonstrated the beneficial effect of Low-Temperature Tempering on the microstructure and properties of martensitic stainless steel coatings produced by laser cladding [32]. They proved that the post-treatment leads to martensite decomposition into finer tempered martensite with precipitations of numerous nano-sized Fe 3 C carbides [32]. Chen et al investigated the laser cladding of Fe-based coatings on rotating shafts made of 35CrMo steel, working in the seawater environment [33].…”

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confidence: 99%

Hybrid Laser Deposition of Fe-Based Metallic Powder under Cryogenic Conditions

Lisiecki

Ślizak²

2020

Metals

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The purpose of this study was to demonstrate the novel technique of laser deposition of Fe-based powder under cryogenic conditions provided by a liquid nitrogen bath. Comparative clad layers were produced by conventional laser cladding at free cooling conditions in ambient air and by the developed process combining laser cladding and laser gas nitriding (hybrid) under cryogenic conditions. The influence of process parameters and cooling conditions on the geometry, microstructure, and hardness profiles of the clad layers was determined. The optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive spectrometer (EDS), and XRD test methods were used to determine the microstructure and phase composition. The results indicate that the proposed technique of forced cooling the substrate in a nitrogen bath during the laser deposition of Fe-based powder is advantageous because it provides favorable geometry of the clad, low dilution, a narrow heat-affected zone, a high hardness and uniform profile on the cross-sections, homogeneity, and refinement of the microstructure. The influence of the forced cooling on microstructure refinement was quantitatively determined by measuring the secondary dendrite arm spacing (SDAS). Additionally, highly dispersed nanometric-sized (200–360 nm) precipitations of complex carbides were identified in interdendritic regions.

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“…Plasma surfacing is one of the widely used methods for steel surface strengthening [1][2][3] owing to several advantages, including the wide variety of surfacing materials, low dilution rate, and high production efficiency [4,5]. Compared with thermal spraying and chemical deposition, plasma surfacing increases the bonding force of the surfacing layer formed with the matrix, resulting in metallurgical bonding and a thickness larger than that obtained using other methods [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Content and Elements Mo and V on the Microstructure and Properties of Stainless Steel Powder Surfacing Layer

Wei

Han

et al. 2020

Coatings

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This study evaluated the effect of an increase in carbon content and the presence of the elements Mo and V on the microstructure and properties of the surfacing layer of stainless steel powder for knives and scissors production. Various types of high-quality stainless steel powder (5Cr 13 , 8Cr 13 , and 8Cr 13 MoV) were deposited on the surface of low-grade stainless steel used to produce knives and scissors (2Cr 13 ). The microstructure, comprehensive hardness, wear resistance, impact toughness, and corrosion resistance of the stainless steel powder surfacing layers were tested and analyzed. Results indicate that the increase in carbon content and the presence of Mo and V improve the comprehensive hardness and wear resistance of the stainless steel powder surfacing layer, and both exert the superposition effect. However, the increase in carbon content and the presence of Mo and V slightly influence the impact toughness of the surfacing layer. In addition, the increase in carbon content significantly reduces the corrosion resistance of the surfacing layer. This adverse effect is reduced when Mo and V exist. Other advantages of the presence of Mo and V in the stainless steel powder surfacing layer include the refinement of grain size, reduction of carbide particle size, and improvement of the metallurgical bonding of the surfacing layer and the matrix.Coatings 2020, 10, 371 2 of 16 barber tools, which are seldom used in daily life. Therefore, to manufacture high-quality knives and scissors that can be used by the general public, this study explores a method to produce such instruments by plasma surfacing. The surfacing layer obtained by plasma surfacing can achieve large thickness [20,21]. This characteristic is used for surfacing powders of high-grade materials for knife and scissors production on the surface of massive low-grade materials for knife and scissors production. The composite material is then longitudinally cut. The thicker surfacing layer is directly used to produce the edge of knives and scissors, while the matrix (low-grade materials) is used to produce the body of knives and scissors. The method belongs to local strengthening of knives and scissors. The advantage of this method is that only the edge of a knife or scissors is mainly forced and abraded during use [22][23][24]; most high-grade materials are in an idle state of inaction. Limiting the use of high-grade materials to the production of the edge of a knife or scissors can not only meet the requirements for knife and scissors production but also reduce waste (of high-quality materials) and limit costs. However, no studies have been reported on surfacing high-quality stainless steel powder for knife and scissors production, and no methods have been developed to evaluate the microstructure and properties of the surfacing layer of high-quality stainless steel powder for such production.This study mainly aims to explore the microstructure and properties of the surfacing layer of high-quality stainless steel powder for knife and scissors product...

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Effects of Low-Temperature Tempering on Microstructure and Properties of the Laser-Cladded AISI 420 Martensitic Stainless Steel Coating

Cited by 22 publications

References 19 publications

Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating

Influence of Vanadium Microalloying on Microstructure and Property of Laser-Cladded Martensitic Stainless Steel Coating

Hybrid Laser Deposition of Fe-Based Metallic Powder under Cryogenic Conditions

Effect of Carbon Content and Elements Mo and V on the Microstructure and Properties of Stainless Steel Powder Surfacing Layer

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