Microstructure and Wear Properties of FeCrC, FeW and Feti Modified Iron Based Alloy Coating Deposited by PTA Process on AISI 430 Steel

Abstract The plasma transferred arc (PTA) process was used for developing wear resistance of AISI 430 steel substrate. Appropriate quantities of FeCrC, FeW and FeTi powders were combined to create conditions that synthesized M7C3 particles into reinforced Fe-based composite surface coating. The phase transformations on new created coated surfaces were comprehensively examined by using a combination of scanning electron microscopy (SEM), microanalysis by energy dispersive spectrometry (EDS), X-Ray diffraction (XRD), microhardness and abrasive wear tests. The microstructure studies of the superficial layers of the coating revealed presence of a mixture of the dendritic phase structure of austenite (γ) and fine eutectic M7C3 carbides. The results show that; the concentrations of the elements (Cr, W, Ti) added as ferroalloys, the size of dendrites formed in the coated surface, the change of hardness of the coated surfaces, the carbide volume rate and thickness of the coating changed by the variation of the processing parameters (ratio of reinforcement particulates and heat input).

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Study on Manufacturing Process and Applying of Galvalume

Materials Science Forum ◽

10.4028/www.scientific.net/msf.704-705.1406 ◽

2011 ◽

Vol 704-705 ◽

pp. 1406-1409

Author(s):

Meng Song ◽

Yun Li Feng ◽

Jing Bo Yang

Keyword(s):

Annealing Treatment ◽

Alloy Coating ◽

Alloy Layer ◽

X Ray Diffraction ◽

X Ray ◽

High Elongation ◽

Coated Surface ◽

Short Time ◽

Zn Alloy ◽

Thermal Simulation Experiment

Annealing and dip galvanizing treatments of Galvalume were studied by using methods of Gleeble thermal simulation experiment and optical microscopy (OM), scanning electronic microscopy (SEM), X-ray energy dispersive analysis (EDAX), X-ray diffraction (XRD) and so on. Meanwhile, surface morphology, microstructure, phases and the respective compositions of Al-Zn alloy coating plate were analyzed. The results show that decreased rate and prolonged time of annealing treatment cause less effect on process ability of product, which all because of the short time of annealing process in continuous aluminum-zinc treatment. However, coarse grain which causes low strength, high elongation and r value occurs when rising annealing temperature. To get better coated surface, in-zinc pot temperature should be controlled in the range of 590~610°C, and height of air-knife nozzle should be kept in the range of 150~200mm. Surface layer of 55％Al-Zn alloy coating is covered by Al-Zn alloy, the intermediate alloy layer is consisted of binary and ternary compounds, such as θ phase (FeAl3), Al0.3Fe3Si0.7 and Al3.21Si0.47. Keywords: Galvalume, Process, Microstructure, Properties

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Growth Mechanism of Micro-Arc Spark Deposited Stellite Alloy Coatings

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.455.83 ◽

2013 ◽

Vol 455 ◽

pp. 83-87

Author(s):

Chun Hua Zhang ◽

Chao Wang ◽

Song Zhang ◽

Ming Sheng Wang ◽

Yu Jiang Xie ◽

...

Keyword(s):

Growth Mechanism ◽

Steel Substrate ◽

Solidification Rate ◽

Single Pulse ◽

Alloy Coating ◽

Processing Parameters ◽

High Energy ◽

Smooth Transition ◽

Phase Identification ◽

Chemical Compositions

Micro-arc spark deposition with Stellite6 alloy as the coating material on SCH13 steel substrates was carried out using high-energy micro-arc process with different processing parameters. The microstructure, chemical compositions and phase identification of the deposition layers were examined by using scanning electron microscopy (SEM), energy dispersive Xray spectroscopy (EDS) and X-ray diffraction (XRD), respectively. Meanwhile the form and growth mechanism of a single pulse deposit were focused on. The results show that the morphology of the single pulse deposit is splashshape. A large number of single pulse deposits deposited and superimposed continuously and then deposition layers with a certain thickness were formed. The epitaxial growth coating with columnar grains was then achieved by the micro-arc spark deposition. The prepared Stellite6 alloy coating has a good metallurgical combination with the SCH13 steel substrate and the elements at the interface are smooth transition. Because of the effects of the temperature gradient and the solidification rate, the microstructure of the deposition layer is slightly coarser with the increasing of the processing voltage. The coatings are consisted of γ-Co solid solution and chromium carbides.

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Wear Characterization of Al/ B4C surface composite produced by TIG arc process

INTERNATIONAL JOURNAL OF ADVANCED PRODUCTION AND INDUSTRIAL ENGINEERING ◽

10.35121/ijapie201804221 ◽

2018 ◽

Vol 3 (2) ◽

pp. 01-05

Author(s):

N. Yuvaraj ◽

Keyword(s):

Optical Microscope ◽

X Ray Diffraction ◽

Wear Properties ◽

Composite Surface ◽

X Ray ◽

Surface Composite ◽

Surface Composites ◽

Scanning Electron ◽

Wear Characterization

Aluminum-based surface composites were fabricated by the TIG arc process. B4C micro and nanoparticles were filled separately on the grooves of the Aluminum substrate and modified the surfaces with different TIG arc speeds. The modified composite surface was characterized by optical microscope, Scanning Electron microscope, and X-ray diffraction. The microhardness and wear properties of the composite surface were evaluated. The results of this study revealed that the newly formed nanocomposite surface enhances the hardness and wear characteristics. The wear worn-out surfaces of the composite surface were analyzed through SEM studies in order to understand the wear mechanisms

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Formation of Composite Surface Layers TiNiTa + cBN-Co-NiAl-Y Considering their Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.886.8 ◽

2017 ◽

Vol 886 ◽

pp. 8-12 ◽

Cited By ~ 1

Author(s):

Peter Olegovich Rusinov ◽

Zhesfina Michailovna Blednova

Keyword(s):

Processing Parameters ◽

X Ray Diffraction ◽

Surface Layers ◽

Composite Surface ◽

Optimal Processing ◽

Steel Material ◽

Protective Environment ◽

Surface Modified ◽

Oxygen Fuel ◽

State Composition

We developed formation technology of composition "steel - material with shape memory effect - high-temperature ceramic wear layer" by means of high-velocity oxygen-fuel spraying in the protective environment of mechanically activated powders TiNiTa and cBN-Co-NiAl-Y. We determined optimal processing parameters. We revealed regularities in the formation of nanosized state composition on the basis of the complex X-ray diffraction and electron microscopy studies. We carried out tests om steel 1045 with a surface-modified layer TiNiTa + cBN-Co-NiAl-Y in high-cycle fatigue, which confirmed the increase in endurance limit.

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Microstructure and Wear Properties of TiC/Fe-Based Composite Coating Prepared by PTA Weld-Surfacing Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.652-654.1780 ◽

2013 ◽

Vol 652-654 ◽

pp. 1780-1786

Author(s):

Zhong Li Zhao ◽

Kai Fang Dang ◽

Jun Hai Liu ◽

Da Ming Wu ◽

Ying Liu ◽

...

Keyword(s):

Composite Coating ◽

Adhesive Wear ◽

Steel Substrate ◽

Wear Test ◽

X Ray Diffraction ◽

Scanning Electron Micrograph ◽

Wear Properties ◽

X Ray ◽

Q235 Steel ◽

Plasma Transferred Arc

The TiC/Fe-based composite coating was fabricated by plasma transferred arc (PTA) weld-surfacing process on substrate of Q235 steel with the mixture of ferrotitanium, ferrochromium and ferrosilicium powders. The microstructure and wear properties of the coating were investigated by means of X-ray diffraction (XRD), scanning electron micrograph (SEM), energy dispersive X-ray analysis (EDS), microhardness test and wear test. The results show that the coating consists of TiC, (Cr,Fe)7C3 and austenite. The composite coating is metallurgically bonded to the Q235 steel substrate. TiC particles formed by PTA weld-surfacing process presented cubic or “dendrite flower-like” morphology. The wear-resisting property of the coating was greatly improved compared with the substrate. The coating has excellent adhesive wear and grinding abrasion resisting force.

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Mechanical Performance of the Annealed NiTi Shape Memory Alloy Coating onto 316L Stainless Bio-Steel

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.297-301.365 ◽

2010 ◽

Vol 297-301 ◽

pp. 365-369 ◽

Cited By ~ 2

Author(s):

Tuty Asma Abubakar ◽

M. Rahman ◽

Denis P. Dowling ◽

Joseph Stokes ◽

M.S.J. Hashmi

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Mechanical Behaviour ◽

Mechanical Performance ◽

Steel Substrate ◽

Parent Phase ◽

Alloy Coating ◽

Niti Shape Memory Alloy ◽

X Ray Diffraction ◽

Ball Joints

This paper presents the mechanical performance of the annealed NiTi Shape Memory Alloy (SMA) coating deposited onto 316L stainless steel substrate. The as-deposited SMA coating, Ni55.9 Ti44.1, showed an amorphous behaviour. The crystalline NiTi (SMA) coating was produced by annealing the as-deposited NiTi with a thickness about 2.0 µm, at above its crystallisation temperature in a vacuum ambient. The annealed NiTi coatings were characterised to determine the effect of the annealing parameters on their mechanical behaviour. The NiTi phases and structures were determined by x-ray diffraction (XRD) and scanning electron microscopy (SEM) whereas the mechanical properties were measured using the Rockwell C adhesion test. Three main phases; NiTi B2 parent phase, Ni3Ti and TiO2 were found in the annealed samples and the intensities of each phase were dependent on the annealing temperature and annealing time. Each phase significantly affected the mechanical behaviour of the coatings. Higher intensities of Ni3Ti and TiO2 phases were believed to contribute to the low adhesion of the annealed NiTi coatings due to their brittle properties. The annealing parameters; 600 °C for durations of 30 min was considered as the optimum parameter, yielding no fine cracks at the Rockwell C indentation interface compared to other samples at high magnification under the SEM. Adding a hard top layer of TiN would potentially provide a hard coating with an interlayer capable of absorbing impact which would be very suitable for ball joints used in hip replacement therapy.

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Study on Hot Dip and Coating Structure of 55% Al-Zn Alloy Coated Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.276 ◽

2011 ◽

Vol 415-417 ◽

pp. 276-280 ◽

Cited By ~ 1

Author(s):

Yan Hong Leng ◽

Yun Li Feng ◽

Meng Song

Keyword(s):

Simulation Experiment ◽

Alloy Coating ◽

Alloy Layer ◽

X Ray Diffraction ◽

Coating Structure ◽

X Ray ◽

Coated Surface ◽

Zn Alloy ◽

Thermal Simulation Experiment ◽

Air Knife

Hot dip galvanizing treatments of Galvalume were studied by using methods of Gleeble thermal simulation experiment and optical microscopy(OM), scanning electronic microscopy (SEM), X-ray energy dispersive analysis(EDAX), X-ray diffraction(XRD) and so on. Meanwhile, surface morphology, microstructure, phases and the respective compositions of Al-Zn alloy coating plate were investigated, the formation of hot dipped 55％Al-Zn alloy coating were analyzed. The results show that to get better coated surface, in-zinc pot temperature should be controlled in the range of 590~610°C, and height of air-knife nozzle should be kept in the range of 150~200mm. Surface layer of 55％Al-Zn alloy coating is covered by Al-Zn alloy, the intermediate alloy layer is consisted of binary and ternary compounds, such as θ phase (FeAl3), Al0.3Fe3Si0.7and Al3.21Si0.47.

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Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Materials ◽

10.3390/ma14102621 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2621

Author(s):

Aneta Bartkowska

Keyword(s):

Corrosion Resistance ◽

Tool Steel ◽

Laser Processing ◽

Chemical Elements ◽

Steel Substrate ◽

Processing Parameters ◽

Beam Power ◽

Laser Beam Power ◽

High Microhardness ◽

The Impact

The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Chromium and boron as well as their mixtures were prepared in various proportions and then were applied on steel substrate in the form of precoat of 100 µm thickness. Depending on the type of precoat used and laser processing parameters, changes in microstructure and properties were observed. Coatings produced using precoat containing chromium and boron mixture were characterized by high microhardness (900 HV0.05–1300 HV0.005) while maintaining good corrosion resistance. It was also found that too low laser beam power contributed to the formation of cracks and porosity.

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Comparison of Focused Ion Beam and Conventional Techniques on Tem Specimen Preparation of Metal-Ceramic Interfaces

Microscopy and Microanalysis ◽

10.1017/s1431927600024429 ◽

1998 ◽

Vol 4 (S2) ◽

pp. 860-861 ◽

Cited By ~ 1

Author(s):

A. Ramirez de Arellano López ◽

W.-A. Chiou ◽

K. T. Faber

Keyword(s):

Focused Ion Beam ◽

Ceramic Coating ◽

Steel Substrate ◽

Ion Beam ◽

Specimen Preparation ◽

Inhomogeneous Materials ◽

Cross Sectional ◽

Fine Grain ◽

Basic Industry ◽

Coated Surface

The results of TEM analyses of materials are critically dependent on the quality of the sample prepared. Although numerous techniques have been developed in the last two decades, differential thinning of inhomogeneous materials remains a serious problem. Recently, focused ion beam (FIB) technique has been introduced for cross-sectional sample preparation for TEM and SEM.A novel system for depositing a fine-grain (∼ 200 nm) ceramic coating on a metal surface via a patent pending Small-Particle Plasma Spray (SPPS) technique has been developed at the Basic Industry Research Laboratory of Northwestern University. To understand the properties of the coated surface, the ceramic/metal interface and the microstructure of the ceramic coating must be investigated. This paper presents a comparison of the microstructure of an A12O3 coating on a mild steel substrate prepared using conventional and FEB techniques.

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