Microstructural Evolution of In Situ (Fe,Cr)7C3 Particles Reinforced Iron Matrix Composites

2012 ◽  
Vol 503-504 ◽  
pp. 408-411
Author(s):  
Li Bin Niu ◽  
Jing Lai Tian ◽  
Xiao Gang Wang
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Cross Section ◽  
Microstructural Evolution ◽  
Gray Cast Iron ◽  
Treatment Time ◽  
Matrix Composites ◽  
Iron Matrix ◽  
Metallurgical Bonding

A kind of (Fe,Cr)7C3particles reinforced iron matrix composite was prepared by metallurgical bonding between Cr wires and gray cast iron at 1200°C with subsequent heat treatment. The obtained composites were comparatively characterized by XRD, SEM and microhardness tests. The results showed that the composites mainly consisted of α-Fe matrix and the reinforcements of particle bundles, which include (Fe,Cr)7C3 carbides and γ-Fe. The cross-section of the reinforcements gradually increase with heat treatment time, and the microstructures change from eutectic to hypoeutectic, the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics.

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

2012 ◽  
Vol 602-604 ◽  
pp. 456-459
Author(s):  
Jing Lai Tian ◽  
Fang Xia Ye ◽  
Li Sheng Zhong ◽  
Yun Hua Xu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
White Cast Iron ◽  
Treatment Time ◽  
Reference Sample ◽  
Chemical Compositions ◽  
Matrix Composites ◽  
Iron Matrix ◽  
Pin On Disc

In-situ production of (Fe,Cr)7C3 particulate bundles -reinforced iron matrix composite was prepared by infiltration casting between Cr wires and white cast iron at 1200°C plus subsequent heat treatment. The composites under different heat treatment times were comparatively characterized by scanning electron microscopy (SEM) and pin-on-disc wear resistance tests. The results show that the area of the particle bundles gradually increases with the heat treatment time increasing, and the chemical compositions change from eutectic to hypoeutectic, the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics. Under 5 N loads, the composites appear excellent wear resistance, which is 36 times for the reference sample.

Infiltration Casting and In Situ Fabrication of (Fe,Cr)7C3 Particulates Bundle – Reinforced Iron Matrix Composites

2011 ◽  
Vol 284-286 ◽  
pp. 273-276
Author(s):  
Li Sheng Zhong ◽  
Yun Hua Xu ◽  
Xin Cheng Liu ◽  
Fang Xia Ye ◽  
Jing Lai Tian ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Cast Iron ◽  
Phase Analysis ◽  
Matrix Composite ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Matrix Composites ◽  
Iron Matrix

The method of infiltration casting plus heat treatment process employing chromium wires and cast iron applied to in-situ synthesized (Fe,Cr)7C3 particulates bundle reinforced iron matrix composites. The phase analysis, microstructure, microhardness and wear-resistance of composite were observed and measured. The results show that it is possible to fabricate (Fe,Cr)7C3 particulates bundle reinforced iron matrix composite produced by this technology, and a special structure which called particulates bundle was fabricated. (Fe,Cr)7C3 particulates bundle were distributed in the forms of granular, lath-shaped and hexagon-shaped in the particulates bundle. The macrohardness of particulates bundle was 52 HRC, and the relative wear resistance of the composites is 2.3—23 times higher than that of the cast iron.

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.

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

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

2016 ◽  
Vol 852 ◽  
pp. 461-466 ◽  
Author(s):  
Xin Wang ◽  
Li Sheng Zhong ◽  
Na Na Zhao ◽  
Vladimir E. Ovcharenko ◽  
Yun Hua Xu
Keyword(s):  
Cast Iron ◽  
High Hardness ◽  
Ductile Cast Iron ◽  
Matrix Composites ◽  
Iron Matrix ◽  
General Process ◽  
Ceramic Particles ◽  
Wide Range ◽  
The Matrix

Ceramic particles (such as VC, NbC, TiC, and WC), which exhibit high hardness and thermal stability, can be used for in situ fabrication of carbide-reinforced iron matrix composites with high macro-hardness and toughness. In this study, we describe a novel in situ process comprising infiltration casting and heat treatment to form carbide-reinforced iron matrix composites with hard ceramic particles. Our proposed approach was used to integrate different alloy wires, which can easily form carbides, into the metal matrix and cast a known amount of carbon, such as gray cast iron, ductile cast iron, or ordinary white cast iron, to form alloy-reinforced iron matrix composites. Thermal treatment of the resulting composites allowed the alloy elements of the wire to react with carbon in the matrix to form evenly distributed carbide particles. This approach can be applied to a wide range of materials with different morphologies for fabricating composites, machining tools, and wear-resistant components.

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.

Microstructures and Wear-Resistant Properties of In Situ WCp/W Wire Hybrid Reinforced Iron Matrix Composites via Electromagnetic Field

2009 ◽  
Vol 79-82 ◽  
pp. 1463-1466 ◽  
Author(s):  
Li Bin Niu ◽  
Yun Hua Xu ◽  
Hong Wu
Keyword(s):  
Electromagnetic Field ◽  
Gray Cast Iron ◽  
Wear Loss ◽  
Matrix Composites ◽  
Iron Matrix ◽  
Wear Resistant ◽  
Pin On Disc ◽  
Reference Samples ◽  
Properties Of Composites

In the paper, tungsten carbide (WC) particles can be in-situ synthesized by applying electromagnetic field to the system consisting of tungsten wires and gray cast iron melt at 1573 K. The microstructures and wear-resistant properties of composites reinforced by both WC particles and the residual tungsten wires were investigated by XRD, SEM, EDS, micro-hardness and pin-on-disc wear measurements. The results show that, with enhancing frequencies of electromagnetic field from 0 to 5 KHz, the amounts of in-situ WC particles increased and of the residual tungsten wires gradually decreased until tungsten wires completely reacted. Due to the higher hardness of in-situ WCp(2100-2231HV0.1) and the strong interfacial bonding, the composites displayed an excellent wear-resistant properties. When the frequency was 5 kHz, the wear loss for the composite fabricated was optimal and 2.69 times lower than that of reference samples.

Microstructural evolution in ultrasonically processed in situ AZ91 matrix composites and their mechanical and wear behavior

2014 ◽  
Vol 53 ◽  
pp. 475-481 ◽  
Author(s):  
Sachin Vijay Muley ◽  
Satya Prakash Singh ◽  
Piyush Sinha ◽  
P.P. Bhingole ◽  
G.P. Chaudhari
Keyword(s):  
Microstructural Evolution ◽  
Wear Behavior ◽  
Matrix Composites

scholarly journals Sintering and Mechanical Properties of (SiC + TiCx)p/Fe Composites Synthesized from Ti3AlC2, SiC, and Fe Powders

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2453
Author(s):  
Mingtao Wang ◽  
Zecheng Wang ◽  
Zhiyue Yang ◽  
Jianfeng Jin ◽  
Guoping Ling ◽  
...  
Keyword(s):  
Ceramic Particle ◽  
Matrix Composites ◽  
Plastic Response ◽  
Excellent Performance ◽  
Iron Matrix ◽  
Particle Content ◽  
Reinforcing Effect ◽  
In Situ Formation ◽  
Hybrid Reinforcement

Ceramic-particle-reinforced iron matrix composites (CPR-IMCs) have been used in many fields due to their excellent performance. In this study, using the fast resistance-sintering technology developed by our team, iron matrix composites (IMCs) reinforced by both SiC and TiCx particles were fabricated via the addition of SiC and Ti3AlC2 particles, and the resulting relative densities of the sintering products were up to 98%. The XRD and EDS analyses confirmed the in situ formation of the TiCx from the decomposition of Ti3AlC2 during sintering. A significant hybrid reinforcing effect was discovered in the (SiC + TiCx)p/Fe composites, where the experimental strength and hardness of the (SiC + TiCx)p/Fe composites were higher than the composites of monolithic SiCp/Fe and (TiCx)p/Fe. While, under the condition of constant particle content, the elongation of the samples reinforced using TiCx was the best, those reinforced by SiC was the lowest, and those reinforced by (SiC + TiCx) fell in between, which means the plastic response of (SiC + TiCx)p/Fe composites obeyed the rule of mixture. The successful preparation of IMCs based on the hybrid reinforcement mechanism provides an idea for the optimization of IMCs.

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