IN SITU DEPOSITION OF Fe-TiC NANOCOMPOSITE ON STEEL BY LASER CLADDING

2016 ◽  
Vol 24 (06) ◽  
pp. 1750080 ◽  
Author(s):  
MANSOUR RAZAVI ◽  
MOHAMMAD REZA RAHIMIPOUR ◽  
MOJDEH GANJI ◽  
MANSOREH GANJALI ◽  
MONIREH GANGALI
Keyword(s):  
Wear Resistance ◽  
Raw Materials ◽  
Steel Substrate ◽  
Nanocomposite Coating ◽  
Laser Method ◽  
In Situ Deposition ◽  
Coating Method ◽  
Crystallite Sizes ◽  
Laser Coating

The possibility of deposition of Fe–TiC nanocomposite on the surface of carbon steel substrate with the laser coating method had been investigated. Mechanical milling was used for the preparation of raw materials. The mixture of milled powders was used as a coating material on the substrate steel surface and a CO2 laser was used in continuous mode for coating. Microstructural studies were performed by scanning electron microscopy. Determinations of produced phases, crystallite size and mean strain have been done by X-ray diffraction. The hardness and wear resistance of coated samples were measured. The results showed that the in situ formation of Fe–TiC nanocomposite coating using laser method is possible. This coating has been successfully used to improve the hardness and wear resistance of the substrate so that the hardness increased by about six times. Coated iron and titanium carbide crystallite sizes were in the nanometer scale.

In Situ Synthesis of Fe–TiC Nanocomposite Coating on CK45 Steel From Ilmenite Concentrate by Plasma-Spray Method

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Alireza Firouzbakht ◽  
Mansour Razavi ◽  
Mohammad Reza Rahimipour
Keyword(s):  
Wear Resistance ◽  
Plasma Spray ◽  
Raw Materials ◽  
Nanocomposite Coating ◽  
In Situ Synthesis ◽  
Phase Identification ◽  
Wear Resistant ◽  
Spray Process ◽  
Ilmenite Concentrate

These days wear-resistant coatings including Fe–TiC composites because of their properties such as high melting point, hardness, and wear resistance are used in different fields such as aerospace, transport, cutting, and abrasive. In situ synthesis of Fe–TiC nanocomposite as a wear-resistant coating by the plasma-spray process is the purpose of this study. Ilmenite concentrate and carbon black were used as raw materials. Three kinds of powders with different conditions were prepared and sprayed on CK45 steel substrates in constant conditions. Microstructure, phase identification, wear resistance, and hardness of coated samples were determined. The results showed that activated sample was synthesized during the plasma spray, but in situ synthesize did not happen for inactive sample which was sprayed by plasma spray. Also, wear resistance and hardness tests showed by synthesis of Fe–TiC composite in coated samples, wear resistance, and hardness were increased.

Fabrication of SiC Particulates Reinforced MoSi2 Composite Coating by Laser Cladding

2008 ◽  
Vol 373-374 ◽  
pp. 304-307
Author(s):  
Sen Yang ◽  
Ming Run Wang ◽  
Tao Gong ◽  
Wen Jin Liu
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Continuous Wave ◽  
Steel Substrate ◽  
Laser Output Power ◽  
Scanning Velocity ◽  
Sic Particulates ◽  
Metallurgical Bond ◽  
Improve Wear Resistance

In order to improve wear resistance of carbon steel, laser cladding experiments were carried out using a 3kW continuous wave CO2 laser. The diameter of the laser beam was 3-5mm, the scanning velocity was 3-10mm/s, and the laser output power was 1.0-1.3kW. The experimental results showed that MoSi2/SiCP composites coating could be in-situ synthesized from mixture powders of molybdenum, silicon and SiC by laser cladding. A good metallurgical bond between the coating and the substrate could be achieved. The microstructures of the coating were mainly composed of MoSi2, SiC and FeSiMo phases. The average microhardness of the coating was about HV0.21300, about 6.0 times larger than that of steel substrate.

Characterization of In Situ Synthesized TiC-TiB2 Reinforced Fe Matrix Wear-Resistant Coating by TIG Arc/Cored-Wires Weld Overlaying Technology

2014 ◽  
Vol 1030-1032 ◽  
pp. 34-38 ◽  
Author(s):  
Meng Ru Liu ◽  
Han Chi Cheng ◽  
Lan Li ◽  
Shang Li ◽  
Chang Shun Huang
Keyword(s):  
Wear Resistance ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Micro Hardness ◽  
Cored Wire ◽  
Weld Overlay ◽  
Overlay Coating ◽  
Hardness Tester ◽  
Dense Microstructure

TiC-TiB2/ Fe matrix composite coatings were in-situ synthesized in the surface of Q235 steel substrate by TIG/cored-wire weld overlaying. The microstructure, micro-hardness and wear resistance of the weld overlay coating were investigated using SEM, XRD, Micro-hardness Tester and Pin-disc Wear Tester respectively. The results showed that the weld overlay coating presented a dense microstructure with defect-free of pore and crack, and better metallurgical bond with the substrate; TiC and TiB2 particulate distributed dispersively in Fe matrix of the weld overlay coatings. The highest Micro-hardness of the weld overlaying was 1657.58HV, which is 6 times higher than the substrate, and wear resistance are also improved at the room temperature under normal atmosphere conditions.

MICROSTRUCTURE AND PROPERTIES OF IN SITU SYNTHESIZED ZrC-ZrB2/Fe COMPOSITE COATING PRODUCED BY GTAW

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1438-1443 ◽  
Author(s):  
ZHENTING WANG ◽  
LILI CHEN ◽  
XIANYOU ZHANG
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Volume Fraction ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Energy Dispersive Spectrum ◽  
X Ray Diffraction ◽  
Gas Tungsten Arc ◽  
C 30

A metal matrix composite coating reinforced by ZrC - ZrB 2 particulates has been successfully fabricated utilizing the in situ reaction of Zr , B 4 C and Fe pre-placed mixed powders by gas tungsten arc welding (GTAW) cladding process. Various volume fraction of ZrC - ZrB 2 particulates composite coatings were produced through cladding different weight ratios of Zr + B 4 C (30%, 50%, 70%) to improve the wear resistance of AISI1020 steel substrate. The Microstructure of the coating was analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectrum (EDS), meantime microhardness and wear resistance at room temperature of the composite coating were examined by means of Microhardness Tester and Wear Tester, respectively. The results show that the main phases of the composite coating obtained by GTAW are ZrC , ZrB 2 and α- Fe , ZrC exhibits hexahedron and petal shapes, ZrC - ZrB 2 compound presents acicular and clubbed forms. With the increase of content of Zr + B 4 C , the maximum volume fraction of ZrC - ZrB 2 particulates can reach 16.5%, microhardness is up to 1300HV, and wear resistance is about twenty times higher than that of AISI1020 steel substrate.

scholarly journals Locally Reinforcement TiC-Fe Type Produced in Situ in Castings

2016 ◽  
Vol 16 (3) ◽  
pp. 77-82 ◽  
Author(s):  
E. Olejnik ◽  
Ł. Szymański ◽  
P. Kurtyka ◽  
T. Tokarski ◽  
W. Maziarz ◽  
...  
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Raw Materials ◽  
Cast Steel ◽  
Structural Elements ◽  
Wear Resistant ◽  
Mineral Raw Materials ◽  
Energy Consuming ◽  
The Subject

Abstract Refinement is one of the most energy consuming technological process, aimed at obtaining mineral raw materials of the proper grain size. Cast structural elements such as jaws or hammers in crushing machines operate under conditions of an intensive wear. The data indicate that 80 % of failures of machines and devices is caused by wearing of rubbing surfaces. This problem became the subject of several scientific and industrial investigations carried out in the whole world in order to produce materials ultra- wear resistant. Methods allowing to obtain wear resistant composite castings are discussed in the hereby paper. Within the performed research microstructures of the produced composite zones were presented and the comparative analysis with regard to mechanical and functional properties of local composite reinforcements in relation to the commercial alloys of increased wear resistance was performed. The results show almost twenty five times increase in wear resistance compared to manganese cast steel containing 18 % Mn.

Microstructure and Wear Resistance of In Situ Synthesized TiC-TiB2 Particulate Reinforced Ni-Based Composite Coating by Argon-Arc Cladding

2014 ◽  
Vol 1004-1005 ◽  
pp. 763-767
Author(s):  
Zhen Ting Wang ◽  
Fan Feng
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Steel Substrate ◽  
Energy Dispersive Spectrometer ◽  
X Ray Diffraction ◽  
Q235 Steel ◽  
Clad Layer ◽  
Precursor Powders ◽  
Particulate Reinforced

In situ synthesized TiC-TiB2reinforced Ni based coating was fabricated by argon arc cladding on Q235 steel substrate using titanium, boron carbide, Ni60 as the precursor powders. The phase composite on and microstructure of the clad layer were investigated by means of X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and Energy Dispersive Spectrometer (EDS). The results show that uniformly distributed TiC particles with the black petals shape and TiB2particles with rod shape could be synthesized by the situ reaction. Compared to those unreinforced Q235 steel substrate, the hardness and the wear resistance of TiC-TiB2reinforced Ni based composite coating were significantly enhanced.

The Influence of Heat Treatment on the Interface and Properties of Mo2FeB2 Cermets-Steel Clad Material

2014 ◽  
Vol 541-542 ◽  
pp. 199-203 ◽  
Author(s):  
Jun Song Peng ◽  
Ying Jun Pan ◽  
Heng Zhang
Keyword(s):  
Heat Treatment ◽  
Raw Materials ◽  
Steel Substrate ◽  
Liquid Phase Sintering ◽  
Interface Area ◽  
Distribution Of Elements ◽  
Before And After ◽  
Material Grain Size ◽  
Cladding Material

Using B, Mo, and Fe powders as raw materials, Mo2FeB2 cermets-steel clad material has been prepared on steel 45 substrate by means of in-situ reaction vacuum and liquid phase sintering technology, and the influence of heat treatment on microstructure and properties has been studied. The influence of heat treatment on microstructure, and distribution of elements of the cladding-substrate bonding interface area has been investigated by SEM, EDS. Results show that there is an excellent metallurgic bonding between the cladding layer and steel substrate both before and after heat treatment, and heat treatment not only brings the cladding material grain size and microstructure refinement but also increases the thickness of the transition layer.

In Situ TiB2 Particles Reinforced Copper Matrix Composite Coating on Mould Steel by Laser Cladding

2010 ◽  
Vol 654-656 ◽  
pp. 1856-1859 ◽  
Author(s):  
Xue Liu ◽  
Sen Yang
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Laser Cladding ◽  
Steel Substrate ◽  
Wear Test ◽  
Copper Matrix ◽  
Dry Sliding Wear ◽  
Cycle Duration ◽  
Tib2 Particles

To extend the mould cycle duration and to reduce cost, a TiB2 particulate reinforced Cu based composite coating was produced on hot-working die steel substrate using laser cladding. The experimental results showed that TiB2 particles embedded in copper based alloy were in-situ synthesized during laser processing. An excellent bonding between the coating and the substrate was obtained. The microstructure of the coating was mainly composed of -Cu dendrites and dispersed TiB2 particles. The maximum microhardness of the coating was about 800HV0.2. The wear resistance of the coating was evaluated under room temperature dry-sliding wear test condition. Due to the presence of a large amount of TiB2 particles, the composite coating exhibited excellent wear resistance compared with that of substrate.

NANOWIRE OXIDE FILM FOR LOW-TEMPERATURE ALUMINIZED 20 STEEL BY THERMAL OXIDATION

2021 ◽  
pp. 2150026
Author(s):  
MIN HUANG ◽  
YONG-CHUAN DUAN ◽  
YU WANG ◽  
YI-CHEN CAI ◽  
LIU-YI HU
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Low Temperature ◽  
Thermal Oxidation ◽  
Steel Substrate ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
X Ray

An aluminized coating for low-carbon steel with good corrosion and wear resistance was first prepared through low-temperature pack aluminization. Then, the low-temperature-aluminized steel substrate was subjected to thermal oxidation in air. The phase composition, surface morphology, roughness, and elemental distribution of the aluminized carbon steel both before and after thermal oxidation were analyzed through X-ray diffraction spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The corrosion resistance and wear resistance of the original carbon steel substrate, aluminized carbon steel, and oxidized carbon steel were tested. Results showed that nanowires composed of iron oxide and alumina formed in situ on the top layer of the aluminized carbon steel. The corrosion resistance and wear resistance of the low-carbon steel with the nanowire oxide coating were better than those of the original carbon steel and aluminized carbon steel because the in-situ nanowire oxide film improved the density of the aluminized coating.

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