Abrasive Wear Characteristics of In Situ TiC-Reinforced Iron Matrix Surface Gradient Composites

2012 ◽  
Vol 535-537 ◽  
pp. 81-85 ◽  
Author(s):  
Liang Liang Wang ◽  
Yun Hua Xu ◽  
Li Sheng Zhong
Keyword(s):  
Titanium Carbide ◽  
Abrasive Wear ◽  
Wear Testing ◽  
Synthesis Process ◽  
Titanium Plate ◽  
Iron Matrix ◽  
Surface Gradient ◽  
Matrix Surface ◽  
Carbide Particles

An in-situ synthesis process combining an infiltration casting with a following heating treatment was applied to fabricate special titanium carbide (TiC) particles-reinforced iron matrix surface gradient composites in this article. The microstructure and wear-resistance of the titanium carbide particle reinforced iron matrix surface gradient composites were researched by using differential scanning calorimetry, X-ray diffraction, scanning electron microscopy and abrasive wear testing. The results showed that two materials had been reacted completely between the titanium plate and gray cast iron, and the titanium carbide particles distributed in the matrix with the thickness of 266.7 μm reaction layer. The average size of titanium carbide between titanium plate and iron matrix was about 1-2μm. Under the same condition, the wear mechanism of titanium carbide particles-reinforced iron matrix surface gradient composites appeared as: micro-ploughing, micro-cutting and broken titanium carbide.

Study on TaC Reinforced Iron Matrix Surface Gradient Composites Produced In Situ

2016 ◽  
Vol 848 ◽  
pp. 38-42 ◽  
Author(s):  
Na Na Zhao ◽  
Yun Hua Xu ◽  
Ke Song ◽  
Liu Liu Shen ◽  
V.E. Ovcharenko
Keyword(s):  
Volume Fraction ◽  
Tantalum Carbide ◽  
Ceramic Layer ◽  
Wear Testing ◽  
Micro Hardness ◽  
Iron Matrix ◽  
Surface Gradient ◽  
Matrix Surface ◽  
Dense Ceramic

Tantalum carbide (TaC) gradient composites were fabricated via in-situ fabrication method from the tantalum plate and gray cast iron. The morphology, phase constituents, micro-hardness, and relative abrasion resistance of the composites were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), micro-hardness tester and abrasive wear testing machine. The surface layer, which was ~160μm thick, was dense ceramic layer composed by ~90% submicron TaC particulates. The highest micro-hardness value of the dense ceramic layer was 13.84 GPa. In the sub-layer, the gradient distribution of TaC particulates reflected in the volume fraction decreased from 90% to 0%. While the micro-hardness value decreased from 10.81 GPa to 4.10 GPa. The metallurgical combination of the interface between the composites and matrix was perfect. The wear resistance of TaC reinforced iron matrix surface gradient composites increased significantly.

General Process for In Situ Formation of Iron-Matrix Surface Composites Reinforced by Carbide Ceramic

2016 ◽  
Vol 852 ◽  
pp. 467-471
Author(s):  
Xi Zhang ◽  
Li Sheng Zhong ◽  
Na Na Zhao ◽  
Vladimir E. Ovcharenko ◽  
Hong Wu ◽  
...  
Keyword(s):  
Ductile Cast Iron ◽  
Synthesis Process ◽  
Iron Matrix ◽  
General Process ◽  
Ceramic Particles ◽  
Surface Composites ◽  
Matrix Surface ◽  
Wide Range ◽  
Particulate Reinforced

Ceramic particles with high hardness and thermal stability can be used to fabricate in situ carbide particulate-reinforced iron-matrix surface composites with high macro-hardness while retaining high toughness. This paper describes a general process by which in situ carbide particulate-reinforced iron-matrix surface composites with hard ceramic particles are readily formed by a novel in situ synthesis process that combines an infiltration casting process with subsequent heat treatment. The basis of our approach is integrating selected plates of different alloys that can form carbide easily into a metal matrix with a certain amount of carbon such as gray or ductile cast iron by casting to form alloy plates reinforced iron-matrix surface composites. Subsequent thermal treatment of resulting composites leads to alloy elements of plate reacting to the carbon in the matrix to form carbide particles. This approach is applicable to a wide range of materials and morphologies, and can be used in composites and machining tools, as well as in the wear-resistant component industry.

Microstructure and Abrasive Wear Characteristics of In Situ WC Bundles – Reinforced Iron Matrix Composites

2011 ◽  
Vol 284-286 ◽  
pp. 265-268 ◽  
Author(s):  
Li Sheng Zhong ◽  
Yun Hua Xu ◽  
Peng Yu ◽  
Xiao Jie Liu ◽  
Fang Xia Ye ◽  
...  
Keyword(s):  
Weight Loss ◽  
Tungsten Carbide ◽  
Synthesis Process ◽  
Matrix Composites ◽  
Tungsten Carbides ◽  
X Ray Diffraction ◽  
Iron Matrix ◽  
The Matrix ◽  
Carbide Particles

An in-situ synthesis process combining an infiltration casting with a subsequent heat treatment was applied to fabricate special tungsten carbide (WC) bundles-reinforced iron matrix composites in this work. The microstructure and wear-resistance of the tungsten carbide bundles reinforced iron matrix composites were studied by using scanning electron microscopy, X-ray diffraction and wear tester. Results showed that the tungsten carbide bundles distributed in the matrix with the center-to-center spacing 2.2 mm, and the diameter of each tungsten carbide bundle is about 1 mm. Most of the tungsten carbides agglomerated, but still there were tungsten carbide particles and the size of tungsten carbide particle was about 10—15 μm. The weight loss of the tungsten carbides bundle reinforced iron matrix composites increased with the increase of the loads and the weight loss of the composites is much less than those of the gray cast iron under the same condition. The wear mechanism of tungsten carbide bundles-reinforced iron matrix composites appears as: micro-cutting, micro-ploughing, broken tungsten carbide and broken particles re-embedded in the matrix.

Growth Kinetics of In Situ Preparation of Dense TiC Ceramic Layer-Reinforced Gray Cast Iron Matrix Surface Composites

2015 ◽  
Vol 17 (11) ◽  
pp. 1562-1567 ◽  
Author(s):  
Shaozhong Fan ◽  
Lisheng Zhong ◽  
Yunhua Xu ◽  
Yonghong Fu ◽  
Liangliang Wang
Keyword(s):  
Cast Iron ◽  
Growth Kinetics ◽  
Gray Cast Iron ◽  
Ceramic Layer ◽  
Iron Matrix ◽  
In Situ Preparation ◽  
Surface Composites ◽  
Matrix Surface ◽  
Kinetics Of

Microstructure and Wear Properties of In Situ Production of (Fe,Cr)7C3 Particulate Bundles Reinforced Iron Matrix Composites

2013 ◽  
Vol 652-654 ◽  
pp. 64-68 ◽  
Author(s):  
Jing Lai Tian ◽  
Fang Xia Ye ◽  
Li Sheng Zhong ◽  
Yun Hua Xu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Treatment Time ◽  
Heat Treatment Time ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Matrix Composites ◽  
Wear Properties ◽  
Iron Matrix

In-situ production of (Fe,Cr)7C3 particulate bundles-reinforced iron matrix composites were prepared by infiltration casting between Cr wires and white cast iron at 1200°C plus subsequent heat treatment. The composites prepared under different heat treatment time were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), macrohardness test and pin-on-disc wear resistance test. The results show that the composite is mainly consist of (Fe,Cr)7C3 carbides and γ-Fe. The area of the particulate bundles gradually increases with the increase of heat treatment time, the microstructure evolved from eutectic to hypoeutectic, and the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics, respectively. The (Fe,Cr)7C3 particulate bundles reinforced composite has high macrohardness and excellent wear resistance under dry sliding wear testing conditons.

Study on Microstructure of Vanadium and Chromium-Carbide Reinforced Fe Matrix Surface Composite

2011 ◽  
Vol 399-401 ◽  
pp. 425-429
Author(s):  
Jing Wang ◽  
Si Jing Fu ◽  
Yi Chao Ding ◽  
Yi San Wang
Keyword(s):  
Chromium Carbide ◽  
In Situ Synthesis ◽  
X Ray Diffraction ◽  
Iron Matrix ◽  
X Ray ◽  
Surface Composite ◽  
Matrix Surface ◽  
Scanning Electron ◽  
Cast Technique

Vanadium and chromium-carbide particulates reinforced iron matrix surface composite was produced by cast technique and in-situ synthesis technique. The microstructure of the surface composite was studied by scanning electron microscope(SEM) and X-ray diffraction(XRD). The results show that the production of an iron matrix surface composite reinforced by vanadium and chromium-carbide particulates using the process is feasible. Spherical VC particles and strip-chunky Cr7C3 are generated in the surface composite. An excellent metallurgy-bond is observed between the surface composite and the mater-steel.

The Synthesis, Wearing Properties of Titanium Carbide Particle Beams Reinforces the Cast Iron Matrix Overall Composite Materials by In Situ

2014 ◽  
Vol 651-653 ◽  
pp. 145-149
Author(s):  
Kai Wang ◽  
Liang Liang Wang ◽  
Yun Hua Xu ◽  
Li Sheng Zhong
Keyword(s):  
Cast Iron ◽  
Titanium Carbide ◽  
Carbide Particle ◽  
Testing Machine ◽  
Particle Beam ◽  
Distribution Analysis ◽  
Matrix Composites ◽  
Iron Matrix ◽  
Uniform Dispersion

This paper describes a wire composite method which consists of the use of a cast-penetrated-heat treatment process to elaborate cast iron and titanium silk. After 12 h at 1138 °C heat preservation and oven cooling, the cast iron matrix in situ generated a titanium carbide particle beam that reinforced the iron matrix composites as a whole. By XRD, the SEM (EDS) on the overall composite material of the macro and micro structure and composition distribution were studied. The results showed that the titanium was fully reflected and it generated fascicles in the titanium carbide hard phase of particles and uniform distribution. Analysis of single wire on the composition and morphology observation found that the titanium carbide particle beam presents three characteristics: uniform dispersion, long strips, and an aggregation phase. The ML-100 abrasive wearing-testing machine, with two bodies of titanium carbide, reinforced iron matrix composites overall the wearing experiment that was carried out: the result shows that its wearing resistance is about 4.2 times greater than the cast iron standard sample.

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