TiC Particle Reinforced Reactive Plasma Cladding Composite Coating by the Precursor Carbonization-Composition Process

2011 ◽  
Vol 291-294 ◽  
pp. 167-171
Author(s):  
Jun Bo Liu ◽  
Li Mei Wang ◽  
Jun Sheng Jiang ◽  
Guang Ming Cao
Keyword(s):  
Composite Coating ◽  
Fusion Zone ◽  
Composite Powder ◽  
Base Material ◽  
Q235 Steel ◽  
Plasma Cladding ◽  
Reactive Plasma ◽  
Tic Particle ◽  
Composition Process

Fe-Cr-Ti-C composite powder was prepared by precursor carbonization-composition process using the mixture of ferrotitanium, chromium, iron powders and precursor sucrose as raw materials. In situ synthesized TiC particle reinforced composite coating was fabricated on substrate of Q235 steel by reactive plasma cladding process using Fe-Cr-Ti-C composite powder. Microstructure of the coating was observed by scanning electron microscope (SEM), the phases in the coating were determined by X-ray diffraction (XRD), and the wear resistance of the composite coating was evaluated under dry sliding wear test conditions at room temperature. Results indicate that the composite coating consists of in-situ the reinforcing TiC carbide, (Cr,Fe)7C3 eutectics and austenitic, and is metallurgically bonded to the Q235 steel substrate. TiC carbide in the composite coating showed the gradient distribution. TiC particles present granular in the fusion zone and central zone, and present dendritic in the surface of the composite coating. Hardness of the coating from surface to fusion zone is little difference, the average hardness of the coating is about HV0.2750, is as 3.2 times as the base. The wear mass loss of Q235 base material is 12 times as that of the composite coating.

Performance of Reactive Plasma Cladding TiC Particle Reinforced High Chromium Fe-Based Ceramics Composite Coating

2012 ◽  
Vol 430-432 ◽  
pp. 1032-1035
Author(s):  
Li Mei Wang
Keyword(s):  
Composite Coating ◽  
Fusion Zone ◽  
Base Material ◽  
Central Zone ◽  
Dry Sliding Wear ◽  
Reactive Material ◽  
High Chromium ◽  
Q235 Steel ◽  
Plasma Cladding ◽  
Tic Particle

TheIn SituSynthesized Tic Particle Reinforced High Chromium Fe-Based Ceramics Composite Coating Was Fabricated on the Substrate of Q235 Steel by Plasma Cladding Process Using Fe-Cr-Ti-C Composite Powder as Reactive Material. Microstructure of the Coating Was Observed by Scanning Electron Microscope (SEM), the Phases Were Determined by X-Ray Diffraction (XRD), and the Wear Resistance Was Evaluated under Dry Sliding Wear Test Conditions at Room Temperature. Results Indicate that the Composite Coating Consists of the Reinforcing Tic Carbide, (Cr,Fe)7C3Eutectic as Well as Austenite, and Is Metallurgically Bonded to the Q235 Steel Substrate. the Gradient Distribution of Tic Carbides Is Observed. Tic Particles Present in the Granular Shape in the Fusion Zone and Central Zone while Present in the Dendritic Shape on the Surface of the Composite Coating. Hardness of the Coating from Surface to Fusion Zone Varies a Little; the Average Hardness of the Coating Is about HV0.2750 which Is 3.2 Times as much as that of the Base. the Wear Mass Loss of Q235 Base Material Is 13 Times Higher than that of the Composite Coating.

Performance of Reactive Plasma Cladding TiC Particle Reinforced High Chromium Fe-Based Ceramics Composite Coating

2012 ◽  
Vol 201-202 ◽  
pp. 1106-1109
Author(s):  
Li Mei Wang
Keyword(s):  
Composite Coating ◽  
Fusion Zone ◽  
Base Material ◽  
Central Zone ◽  
Dry Sliding Wear ◽  
Reactive Material ◽  
High Chromium ◽  
Q235 Steel ◽  
Plasma Cladding ◽  
Tic Particle

The in-situ synthesized TiC particle reinforced high chromium Fe-based ceramics composite coating was fabricated on the substrate of Q235 steel by plasma cladding process using Fe-Cr-Ti-C composite powder as reactive material. Microstructure of the coating was observed by scanning electron microscope (SEM), the phases were determined by X-ray diffraction (XRD), and the wear resistance was evaluated under dry sliding wear test conditions at room temperature. Results indicate that the composite coating consists of the reinforcing TiC carbide, (Cr,Fe)7C3 eutectic as well as austenite, and is metallurgically bonded to the Q235 steel substrate. The gradient distribution of TiC carbides is observed. TiC particles present in the granular shape in the fusion zone and central zone while present in the dendritic shape on the surface of the composite coating. Hardness of the coating from surface to fusion zone varies a little; the average hardness of the coating is about HV0.2750 which is 3.2 times as much as that of the base. The wear mass loss of Q235 base material is 13 times higher than that of the composite coating.

Cracking Behavior of Two Kinds of Plasma Cladding Layers by Precursor Carbonization-Composition Process

2013 ◽  
Vol 690-693 ◽  
pp. 2046-2050
Author(s):  
Jun Bo Liu
Keyword(s):  
Composite Powder ◽  
Raw Materials ◽  
Base Material ◽  
Fiber Direction ◽  
X Ray Diffraction ◽  
Cracking Behavior ◽  
Plasma Cladding ◽  
Reactive Plasma ◽  
Composition Process ◽  
Cladding Layers

In-situ synthesized two kinds of Fe-Cr-C and Fe-Cr-C-Ti layers were fabricated on the base of Q235 steel by reactive plasma cladding process using composite powder prepared by precursor carbonization-composition process as raw materials. The composite powder is composed of ferrotitanium, chromium, iron and precursor sucrose. Microstructure of the layer was observed by scanning electron microscope (SEM). The phases in the layer were determined by X-ray diffraction (XRD). Results indicate that the Fe-Cr-C layer consists of primary (Cr,Fe)7C3 carbide, chrysanthemum-shaped eutectic (Cr,Fe)7C3 carbide and eutectic austenite. The cracks in Fe-Cr-C layer might originate at the interface of the layer and the base material as well as at the pores or edges of the layer. These cracks expand along primary (Cr,Fe)7C3 grain boundaries in a crystalline form. Because the grains of primary (Cr,Fe)7C3 are fiber-shaped and the fiber direction are perpendicular to the surface of the layer, so the cracks expand perpendicularly throughout of the Fe-Cr-C layer. The Ti addition into Fe-Cr-C plays an important role in synthesizing TiC and austenite, reducing primary (Cr,Fe)7C3 and improving the microstructure of eutectic (Cr,Fe)7C3. Therefore, Fe-Cr-C-Ti has good performance in toughness and crack-resistance.

Wear Resistance of Fe-Cr-C-TiFe Fe-Based Composite Coating Prepared by Precursor Carbonization-Composition Process and Plasma Cladding

2011 ◽  
Vol 704-705 ◽  
pp. 1237-1243 ◽  
Author(s):  
Jun Bo Liu ◽  
Li Mei Wang
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Composite Coating ◽  
Room Temperature ◽  
Base Material ◽  
High Hardness ◽  
Bearing Steel ◽  
Q235 Steel ◽  
Plasma Cladding ◽  
Composition Process

The sucrose was used as a carbonaceous precursor to fabricate composite alloy powder of Fe-Cr-C-TiFe by the precursor carbonization-composition process using the powder matirial of chromium, iron, tungsten, nickel and ferrotitanium. And the powder of Fe-Cr-C-TiFe was used to form a high-chromium iron-base composite coating on substrate of Q235 steel by plasma cladding process. The microstructure and hardness of the coating were investigated by scanning electron microscope (SEM), energy disperse spectroscopy (EDS), microhardness tester. Wear resistance of the coating was tested on wear tester at room temperature and high temperature 600°C compared with the base material Q235 steel and bearing steel. Results show that the coating consists of TiC, (Cr,Fe)7C3 and austenite and the hardness of the coating is 3.4 times as high as the base body Q235 steel. The wear resistance of the coating at room temperature is 11-15 times as high as the base body Q235 steel. The wear resistance of the coating at high temperature 600°C is 2.45 times as high as Q235 steel and is 1.5 times as high as bearing steel. The composite coating has excellent wear resistance because the reinforce phase TiC and (Cr,Fe) 7C3 in the coating have high hardness and good wear resistance. They can play key roles in process of friction and wear.

Influence of Process Parameters on Microstructure of Reaction Plasma Cladding TiC-Fe-Cr Coating

2021 ◽  
Vol 1027 ◽  
pp. 170-176
Author(s):  
Li Mei Wang ◽  
Jun Bo Liu ◽  
Jun Hai Liu
Keyword(s):  
Process Parameters ◽  
Composite Powder ◽  
Early Stage ◽  
Influence Of Process Parameters ◽  
Synthetic Process ◽  
Plasma Cladding ◽  
Cr Coating ◽  
Composition Process ◽  
Cladding Layers

In order to improve the quality and properties of the coating, a certain amount of Ti was added to the plasma cladding Fe-Cr-C coating in the early stage. And Fe-Cr-C-Ti composite powder was prepared by precursor carbonization-composition process. In situ synthesized TiC-Fe-Cr coatings were fabricated on substrate of Q235 steel by plasma cladding process with Fe-Cr-C-Ti composite powder. Microstructure of the coating with different process parameters, including cladding current, cladding speed, number of overlapping cladding layers, were analyzed by scanning electron microscope (SEM). The results show that the structure of the TiC-Fe-Cr coating is greatly affected by the fusion current, the cladding speed and the overlapping cladding process. In this test, when the cladding current of 300A and the cladding process parameter of the cladding speed of 50 mm/min are clad with three layers, a well-formed and well-structured TiC-Fe-Cr coating can be obtained. Which are the best synthetic process parameters in this test.

Microstructure Analysis of TiC Reinforced Ni-Based Composite Coating by Plasma Cladding

2012 ◽  
Vol 538-541 ◽  
pp. 286-289
Author(s):  
Jin Xia Gong ◽  
Jin Bin Lu ◽  
Ying Liu
Keyword(s):  
Uniform Distribution ◽  
Composite Coating ◽  
Formation Mechanism ◽  
Eutectic Structure ◽  
Microstructure Analysis ◽  
Micro Hardness ◽  
Q235 Steel ◽  
Maximum Value ◽  
Plasma Cladding ◽  
Tic Particle

TiC reinforced Ni-based composite coating added with 10% TiC and 20% TiC particles were prepared on the surface of Q235 steel by plasma cladding, respectively. SEM as well as EDS and XRD were used to investigate the microstructure and formation mechanism of composite coating. The results show that between composite coating and substrate is metallurgical combination, and the microstructure of composite coating is composed of basic microstructure dendrite γ-Ni, interdendritic eutectic structure (α-Fe+Cr23C6+CrB) and dispersed TiC particle. Part of TiC particles melt when the composite coating added with 10% TiC particles, in the composite coating added with 20% TiC particles, part of TiC particles precipitate after dissolution. TiC particles have a uniform distribution with the size 3~5µm. The maximum value of micro-hardness of composite coating added with 10% TiC and 20% TiC particle is 460 HV0.2 and 620 HV0.2, respectively.

Microstructure and Hardness of TiC/Ni-Based Coating by Plasma Cladding

2012 ◽  
Vol 510 ◽  
pp. 734-737 ◽  
Author(s):  
Bin Sun ◽  
Wen Yong Zhang ◽  
Jin Bin Lu ◽  
Zhi Xin Wang
Keyword(s):  
Composite Coating ◽  
Formation Mechanism ◽  
Eutectic Structure ◽  
Micro Hardness ◽  
Q235 Steel ◽  
Maximum Value ◽  
Plasma Cladding ◽  
Tic Particle

TiC reinforced Ni-based composite coating added with 10% TiC particles was prepared on the surface of Q235 steel by plasma cladding. SEM as well as EDS and XRD were used to investigate the microstructure and formation mechanism of composite coating. The results show that between composite coating and substrate is metallurgical combination, and the microstructure of composite coating is composed of basic microstructure dendrite γ-Ni, interdendritic eutectic structure (α-Fe+Cr7C3+Fe3C) and dispersed TiC particle. The maximum value of micro-hardness of composite coating added with 10% TiC particle is 440 HV0.2.

Investigation on TiCP/Al Composite Coating by TIG Cladding

2014 ◽  
Vol 490-491 ◽  
pp. 29-33 ◽  
Author(s):  
Wen Bo Tang ◽  
Cong Hui Lu ◽  
Yan Peng Li
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Testing Machine ◽  
Wear Testing ◽  
Alloy Surface ◽  
Al Composite ◽  
The Matrix ◽  
Tic Particle

TiCp/Al composites coating was in-situ synthesized on the L1060 alloy surface by TIG cladding. The microstructure and the phase of the coating were analyzed by OM, SEM, ADS and XRD, and the properties was been tested by micro-hardnessmeter and wear testing machine. The results show that the composite coating has no porosity, inclusions and other defects. The microstructure of the composite coating mainly consists of TiC particle and aluminum. Microstructural evidence suggests that the formation of TiC occur not only by reaction between Ti dissolved in Al and Al4C3, but also by reaction between C dissolved in Al and Al3Ti. The hardness of the composite coating obtained by TIG cladding is up to 120HV0.2. The wear resistance of composite coating is 1.6 times more than that of the matrix.

Study of Plasma Cladding Ni-Based Compound Powder Layers on Q235 Steel

2012 ◽  
Vol 174-177 ◽  
pp. 219-222
Author(s):  
Zhi Xin Wang ◽  
Li Qian ◽  
Wei Tie Yang
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
X Ray Diffraction ◽  
Microstructure Formation ◽  
X Ray ◽  
Q235 Steel ◽  
Microhardness Distribution ◽  
Resistance Increase ◽  
Plasma Cladding ◽  
Scanning Electron

By plasma cladding technology, the Ni60B/TiC composite coating metallurgically bonded to Q235 steel were prepared using Ni-based alloy and TiC powders. The microstructure formation mechanism of the clad layers was investigated by scanning electron microscopy (SEM) and X-ray Diffraction (XRD). The microhardness distribution and wear resistance of the specimens were tested. The results show that metallurgical combination is achieved between coating and substrate, the microstructure of composite coating is composed of dendrite γ-Ni, α-Fe, added TiC and FeNi. The hardness and wear resistance of composite coating have relationship with TiC particles content and TiC particles distribution. The hardness and wear resistance increase with the increase of TiC particles content.

Sign in / Sign up

Export Citation Format

Share Document