Preparation of SiC-Low Chromium Cast Iron Composite Material by Cast-Infiltration

2011 ◽  
Vol 189-193 ◽  
pp. 3972-3975
Author(s):  
Ning An
Keyword(s):  
Wear Resistance ◽  
Composite Material ◽  
Cast Iron ◽  
Composite Layer ◽  
Dimensional Accuracy ◽  
Steel Matrix ◽  
Matrix Composites ◽  
Sic Particles ◽  
The Matrix ◽  
Chromium Cast Iron

Low-chromium cast iron as the matrix, SiC particles as reinforcement, water glass sand in ordinary dry type, no negative pressure conditions, the use made of composite diffusion agent, prepared the surface of SiC particulate reinforced steel matrix composites. The results show that: SiC particles penetrate the surface of the composite material has excellent wear resistance, with the content of SiC particles increase the wear resistance of composite cast layer increased, when the SiC particle content of 20%, the wear resistance to achieve the best good. The hardness of up to 3000HV composite layer above. Smooth casting surface roughness, dimensional accuracy is more accurate, composite layer and substrate is good.

Preparation of WC-Low Chromium Cast Iron Composite Material by Cast-Infiltration

2010 ◽  
Vol 154-155 ◽  
pp. 1104-1109
Author(s):  
Ning An
Keyword(s):  
Composite Material ◽  
Cast Iron ◽  
Water Glass ◽  
White Cast Iron ◽  
Composite Layer ◽  
Dimensional Accuracy ◽  
Casting Surface ◽  
High Chromium Cast Iron ◽  
Surface Composite ◽  
Chromium Cast Iron

Use of Low-chromium white cast iron as matrix, WC as reinforcement particles, in conditions of Quartz sand in ordinary water glass dry, non-vacuum, using self-made penetration compound was prepared by WC particles reinforced surface composite material with superior wear resistance, is 2.73 times that of high chromium cast iron composite layer hardness can reach HRC60 or more. Smooth casting surface roughness, dimensional accuracy is more accurate, composite layer and substrate is good.

scholarly journals Wear Resistance of TiC Reinforced Cast Steel Matrix Composite

2017 ◽  
Vol 17 (1) ◽  
pp. 143-146 ◽  
Author(s):  
S. Sobula ◽  
E. Olejnik ◽  
T. Tokarski
Keyword(s):  
Wear Resistance ◽  
Matrix Composite ◽  
Base Alloy ◽  
Cast Steel ◽  
Composite Layer ◽  
Wear Loss ◽  
Steel Matrix ◽  
Soft Matrix ◽  
Base Steel ◽  
The Matrix

Abstract Wear resistance of TiC-cast steel metal matrix composite has been investigated. Composites were obtained with SHSB method known as SHS synthesis during casting. It has been shown the differences in wear between composite and base cast steel. The Miller slurry machine test were used to determine wear loss of the specimens. The slurry was composed of SiC and water. The worn surface of specimens after test, were studied by SEM. Experimental observation has shown that surface of composite zone is not homogenous and consist the matrix lakes. Microscopic observations revealed the long grooves with SiC particles indented in the base alloy area, and spalling pits in the composite area. Due to the presence of TiC carbides on composite layer, specimens with TiC reinforced cast steel exhibited higher abrasion resistance. The wear of TiC reinforced cast steel mechanism was initially by wearing of soft matrix and in second stage by polishing and spalling of TiC. Summary weight loss after 16hr test was 0,14÷0,23 g for composite specimens and 0,90 g for base steel.

Pressureless Infiltration Fabricated Steel Matrix Composites Reinforced with WC by the Local Electromagnetism Induction Heating

2011 ◽  
Vol 284-286 ◽  
pp. 106-109
Author(s):  
Li Bin Niu ◽  
Wan Chang Sun ◽  
Zi Min Fan
Keyword(s):  
Induction Heating ◽  
Composite Layer ◽  
Homogeneous Distribution ◽  
Steel Matrix ◽  
Matrix Composites ◽  
High Chromium Cast Iron ◽  
Three Samples ◽  
The Matrix ◽  
Sand Mould ◽  
Moving Speed

A pressure-less infiltration technique was introduced to fabricate WC particles reinforced steel matrix composites through rapidly melting matrix by local electromagnetism induction heating. The four specimens were attained by adjusting the moving speed of sand mould and comparatively investigated. The results showed that the thickness of composite layer was about 4.0 mm. While the moving speed of sand mould was 3.0 cm/min, the reinforced particles had the better homogeneous distribution into the matrix and the metallurgical bonding with the matrix. The wear amount of composites firstly decreased up to a lower value and then increased. Except the sample produced under the speed 1.0 cm/min, the wear-resistant behavior of other three samples were superior to that of high chromium cast iron.

scholarly journals Effects of Heat-Treatment on the Microstructure and Wear Resistance of a High-Chromium Cast Iron for Rolls

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Zhi-hong Guo ◽  
Fu-ren Xiao ◽  
Su-ling Lu ◽  
Han-yun Li ◽  
Bo Liao
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Retained Austenite ◽  
Tempered Martensite ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
The Matrix ◽  
The Impact ◽  
Chromium Cast Iron ◽  
Martensite Matrix

The variations of microstructure and mechanical properties of a high-chromium cast iron for rolls were studied from as-cast to the final heat treatments. Results show that the as-cast microstructure of the HCCI consists of M7C3carbide, M23C6carbide, martensite matrix, and retained austenite. The large dendritic M7C3carbide surrounds the matrix, and the M23C6carbide is mainly distributed in the matrix. Part of M23C6carbide transforms to M7C3carbide and is dissolved in austenite during austenization at 1020°C. Thus, the amount of M23C6carbide decreases, whereas that of M7C3carbide increases after quenching; the highest hardness is also obtained. After tempering, the martensite transforms to a tempered martensite, and some carbide precipitates in the martensite matrix. The hardness also changes from HRC62.1, which corresponds to quenching, to HRC55.2 and HRC56.3, which correspond to once and twice tempering, respectively. However, tempering could improve the impact toughness and wear resistance of the HCCI.

ABK METAL

Alloy Digest ◽  
1953 ◽  
Vol 2 (11) ◽  
Keyword(s):  
Wear Resistance ◽  
Compressive Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Brake Shoe ◽  
Nickel Chromium ◽  
Chromium Cast Iron

Abstract ABK Metal is a nickel-chromium cast iron with excellent wear resistance, recommended for severe abrasive service. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength. It also includes information on wear resistance as well as casting, heat treating, machining, and joining. Filing Code: CI-4. Producer or source: American Brake Shoe Company.

Enhancement of tribological properties and characteristic of polymer matrix composite (UHMWPE reinforced with short fibres of polyester) for Total Disc Replacement (TDR)

2020 ◽  
Vol 2 (102) ◽  
pp. 55-65
Author(s):  
M.N. Obaid ◽  
S.H. Radhi
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Wear Resistance ◽  
Composite Material ◽  
Thermal Properties ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Total Disc Replacement ◽  
Short Fibres ◽  
The Matrix

Purpose: The number of people suffering from Degenerative Disc Disease (DDD) is increasing. The disease causes heavy pain and restrict a number of day-to-day life activities. In extreme cases, the degraded disc is removed under total disc replacement which is usually made up of Ultra-High Molecular Weight Polyethylene (UHMWPE). The material has astounding biocompatible characteristics mechanical properties and wear resistance. However, these characteristics are insufficient in arthroplasty application. Therefore, research investigations are ongoing to improve tribological properties through reinforcement that may result in a composite material of UHMWPE. Thus the current study is aimed at reinforcing UHMWPE with short fibres of polyesters to enhance the tribological properties and surface characteristic so as to improve wear resistance and nourish the fibroblast cells on synthetic disc. Design/methodology/approach: The researcher prepared UHMWPE composite material, reinforced with different weight fractions of short polyester fibres (2, 4, 6, 8 and 10% following hot press method. Further pin-on-disc device was used to study the tribological properties (coefficient of friction and volume of wear). The study tested surface roughness and surface characteristics by atomic force microscopy (AFM) device, hardness by shore D device, contact angle to study the effect of polyester short fibres on wettability of UHMWPE surface and tested the thermal properties and crystalline degree using Differential Scanning Calorimetry measurement (DSC) device. Findings: The results infer that the wear resistance got improved when using 2% w.t polyester though it got decreased initially. However, the value was still more than neat UHMWPE. There was a decrease observed in coefficient of friction, but after 4 w.t% polyester, the coefficient of friction got increased due to increasing percentage of fibres which make it harder and stiff compared to UHMWPE. There was a decline observed in surface roughness due to alignment of the fibres with smooth surface. The contact angle got increased in a moderate range while the roughness enhanced the growth of fibroblast cell. The hardness of composite material got increased, because the fibres turned stiffer and harder than the matrix. DSC results infer the improvements in thermal stability due to high thermal properties of polyester fibres compared to UHMWPE. The degree of crystallinity got increased which in turn enhanced wear resistance, especially at 6 w.t % polyester fibres. There was a mild increase observed in density since the density of polyester is higher than polymer. Research limitations/implications: The major challenge was the dispersion of fibres. Uniform distribution of fibres within the matrix (UHMWPE) was achieved through two steps of mixing processes such as mechanical mixture and twin extruder. In future studies, fatigue tests must be conducted to study the behaviour of prepared composite materials under fatigue cycle. Practical implications: A significant objective is how to connect among different properties to obtain good improvement in tribological and surface properties so as to enhance wear resistance and growth of fibrolase cells. Originality/value: In this study, polymeric short fibres were used as reinforcement with polymeric matrix to enhance the wettability of fibres with matrix. In this way, the bonding among them got increased which supports the tribological, surface, and crystalline behaviour.

Investigations of the Fracture of Composites Matrix-Coating Under Tension

1998 ◽  
Author(s):  
V.E. Panin ◽  
V.A. Klimenov ◽  
S.V. Panin
Keyword(s):  
Steel Matrix ◽  
Matrix Composites ◽  
Coating Quality ◽  
Deformation Stages ◽  
The Matrix ◽  
Sprayed Coating ◽  
Plasma Sprayed

Abstract Deformation stages and specific features were studied by mesomechanical methods under tension of plasma sprayed coating-steel matrix composites. The effect of coating quality on the deformation of the matrix at the mesolevel was revealed. The results obtained make it possible to predict reliability and durability of this kind of coating and of the entire composite.

scholarly journals Development of High-Performance SiCp/Al-Si Composites by Equal Channel Angular Pressing

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 738 ◽  
Author(s):  
Qiong Xu ◽  
Aibin Ma ◽  
Junjie Wang ◽  
Jiapeng Sun ◽  
Jinghua Jiang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Equal Channel Angular Pressing ◽  
High Performance ◽  
Adhesive Wear ◽  
Processing Route ◽  
Matrix Composites ◽  
New Approach ◽  
Angular Pressing ◽  
The Matrix ◽  
Industry Applications

Relatively low compactness and unsatisfactory uniformity of reinforced particles severely restrict the performance and widespread industry applications of the powder metallurgy (PM) metal matrix composites (MMCs). Here, we developed a combined processing route of PM and equal channel angular pressing (ECAP) to enhance the mechanical properties and wear resistance of the SiCp/Al-Si composite. The results indicate that ECAP significantly refined the matrix grains, eliminated pores and promoted the uniformity of the reinforcement particles. After 8p-ECAP, the SiCp/Al-Si composite consisted of ultrafine Al matrix grains (600 nm) modified by uniformly-dispersed Si and SiCp particles, and the composite relative density approached 100%. The hardness and wear resistance of the 8p-ECAP SiCp/Al-Si composite were markedly improved compared to the PM composite. More ECAP passes continued a trend of improvement for the wear resistance and hardness. Moreover, while abrasion and delamination dominated the wear of PM composites, less severe adhesive wear and fatigue mechanisms played more important roles in the wear of PM-ECAP composites. This study demonstrates a new approach to designing wear-resistant Al-MMCs and is readily applicable to other Al-MMCs.

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