Wear properties of AISI 1015 steel coated with Stellite 6 by microlaser welding

Apay, Serkan; Gülenç, Behçet

doi:10.1016/j.matdes.2013.09.056

Cited by 40 publications

(21 citation statements)

References 20 publications

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“…According to Li's research, the microstructure of laser additive manufacturing consisted of γ', MC and γ [25]. According to the research of microstructure of Stellite-6 [26][27][28], the Stellite-6 deposition microstructure might consist of γ (Co) and carbide formations (M 23 C 6 , M 6 C, M 7 C 3 ). Figure 6a illustrates the microstructures of K465 by LMDS, and white precipitates appear discontinuously in the interdendritic, which was an MC phase.…”

Section: Phase Compositionsmentioning

confidence: 99%

Microstructure and Microhardness of Laser Metal Deposition Shaping K465/Stellite-6 Laminated Material

Wang

Zhao

et al. 2017

Metals

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K465 superalloy with high titanium and aluminum contents was easy to crack during laser metal deposition. In this study, the crack-free sample of K465/Stellite-6 laminated material was formed by laser metal deposition shaping to control the cracking behaviour in laser metal deposition of K465 superalloy. The microstructure differences between the K465 superalloy with cracking and the laminated material were discussed. The microstructure and intermetallic phases were analyzed through scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The results showed that the microstructure of K465/Stellite-6 laminated material samples consisted of continuous dendrites with a similar structure size in different alloy deposition layers, and the second dendrite arm spacing was finer compared with laser metal deposition shaping K465. The intermetallic phases in the different alloy deposition layers varied, and the volume fraction of carbides in K465 deposition layer of the laminated material was higher than only K465 deposition under the fluid flow effect. In addition, the composition and microhardness distribution of laminated materials variation occurred along the deposition direction.Keywords: laser metal deposition shaping; laminated material; microstructure; microhardness BackgroundK465 superalloy, known as a nickel-based alloy, is widely used for gas turbine blades and vanes [1]. K465 superalloy parts are mainly formed by conventional casting, leading to some disadvantages in forming efficiency and mechanical properties. Laser metal deposition shaping (LMDS) is an efficient way for producing components with near-net-shaped, directional solidification, and controlled porosity or chemical composition gradient [2,3], and it also knows direct laser fabrication (DLF), or laser solid form (LSF [12], and CM247LC [13] were prone to cracking. The crack sensitivity of nickel-based superalloy increases with the increasing of aluminum and titanium elements. As a result, the research focus of LMDS K465 superalloy concentrates on controlling the cracks. Based on previous studies, the crack category of laser deposition superalloy may contain solidification cracking, grain boundary liquation cracking and ductility dip cracking [10]. Among them, the liquation cracks are the most serious in nickel-based superalloy with a high content of (Al + Ti), and may originate from the liquation of low melting point eutectic in the previous build layers. Chen et al. [6] have found that liquation cracking in laser deposited 718 alloy was on account of

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Section: Phase Compositionsmentioning

confidence: 99%

Microstructure and Microhardness of Laser Metal Deposition Shaping K465/Stellite-6 Laminated Material

Wang

Zhao

et al. 2017

Metals

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“…Stellite superalloy hardfacing over various industrially active substrate materials has been reported to be carried out using various weld overlaying processes like GTAW, GMAW, Plasma transferred arc etc [5][6][7][8][9][10][11][12]. Laser welding for hardfacing using Stellite 6 has also been applied covering a range of aspects including parametric optimization, wear characterization of clads etc [13][14][15][16][17]. Supersonic laser deposition has also been used for Stellite 6 surfacing [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Investigations on high temperature wear and metallurgical characteristics of Stellite 6 GTA (Gas Tungsten Arc) weld claddings

Prakash

Shahi

2020

Mater. Res. Express

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Stellite 6, a cobalt based superalloy was deposited on mild steel AISI 1020 using Gas tungsten arc welding (GTAW) process. The claddings were overlaid in four conditions viz. single layer cladding, double layer cladding, single layer cladding with remelting and double layer cladding with remelting, where remelting of the topmost layer was carried out using autogeneous GTA arc itself. The chemical composition, microstructure, wear mechanism and phase composition of the substrate and coatings were characterized by spectroscopy, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy and x-ray diffraction. The hardness and wear characteristics of different cladded samples were measured using microhardness tester and pin on disc high temperature tribometer respectively. The results show that remelting of Stellite 6 clad layers resulted into microstructural modification that increased their hardness significantly which consequentially improved their wear performance. Oxidative layer formation that occurred at 300°C reduced frictional resistance which resulted into better wear performance of Stellite 6 clad pins. Further, a critical clad thickness was established based upon the wear performance of these claddings and it was observed that 5 mm Stellite clad thickness was sufficent enough to impart uniform wear behavior to these claddings when subjected to high temperature two body abrasive wear applications.

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“…The Mo and W formed with C affect the solid solution and precipitation-hardening phase to improve the strength of Stellite 6. [9][10][11] Ceramic powders that contain N, C, B and Si are introduced into composite powders and combined with Stellite 6. 5,[12][13][14][15] Phases B 4 C and TiB 2 provide a homogenous morphology and excellent mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of Stellite 6 alloy powders incorporated with Ti/B4C using plasma-arc-surfacing processes

Zhu¹,

Ouyang²,

Chen³

et al. 2019

Mater. Tehnol.

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Composite powders including Ti, B4C and Stellite 6 were deposited on the 316 stainless steel using plasma-transferred arc welding to improve the wear resistance. Microstructural characterisation using an optical microscope and a Vickers hardness tester was performed on the surface to determine the coating and hardness. Scanning electron microscopy and energy-dispersive-spectroscopy line scanning were also applied to characterise the microstructure, the chemical composition and the process of wear. Results showed that Ti, B4C and Stellite 6 considerably affected the microstructure and morphology of the coating. The in-situ new phases, namely, TiC and TiB, remarkably improved the wear resistance compared with the Stellite 6 coating only.Avtorji so kompozitne prahove iz zlitine Stellite 6, Ti in B4C nana{ali na povr{ino preizku{ancev s plazemskim napr{evanjem (PTAW), da bi izbolj{ali njihovo odpornost proti obrabi. Izvedli so mikrostrukturno in mehansko karakterizacijo povr{ine z uporabo opti~nega mikroskopa in Vickersovega merilnika trdote. Prav tako so izvedli preiskave z vrsti~nim elektronskim mikroskopom (SEM) in linijsko energijsko disperzijsko spektroskopijo (EDS), da bi ugotovili mikrostrukturo, kemijsko sestavo in potek obrabe. Rezultati raziskav so pokazali, da so Ti, B4C in Stellite 6 znatno vplivali na mikrostrukturo in morfologijo prevleke. In-situ sinteza novih faz (TiC in TiB) med plazenskim napr{evanjem kompozitnih prahov je mo~no izbolj{ala odpornost prevlek proti obrabi v primerjavi s prevlekami, izdelanimi samo iz prahu Stellita 6. Klju~ne besede: in-situ sinteza novih faz, mikrostruktura, PTAW (plazemsko napr{evanje), odpornost proti obrabi

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Wear properties of AISI 1015 steel coated with Stellite 6 by microlaser welding

Cited by 40 publications

References 20 publications

Microstructure and Microhardness of Laser Metal Deposition Shaping K465/Stellite-6 Laminated Material

Microstructure and Microhardness of Laser Metal Deposition Shaping K465/Stellite-6 Laminated Material

Investigations on high temperature wear and metallurgical characteristics of Stellite 6 GTA (Gas Tungsten Arc) weld claddings

Microstructure and mechanical properties of Stellite 6 alloy powders incorporated with Ti/B4C using plasma-arc-surfacing processes

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