Fabrication & Microstructure of TiB2+TiC Duplex Particulates Reinforced Carbon Steel Matrix Surface Composite

2013 ◽  
Vol 575-576 ◽  
pp. 198-202
Author(s):  
Chang Qing Guo
Keyword(s):  
Carbon Steel ◽  
Uniform Distribution ◽  
Compound Layer ◽  
Steel Matrix ◽  
Surface Compound ◽  
Transitional Layer ◽  
Composite Matrix ◽  
Microstructural Investigation ◽  
Surface Composite ◽  
Matrix Surface

This paper presents a novel fabrication process that combines SHS with V-EPC (vacuum expandable pattern casting) and microstructural features of TiB2+TiC duplex particulates reinforced surface composite with carbon steel matrix. Macro structural observation shows that the surface composite is dense and there are no obvious defects. Microstructural investigation demonstrates that the composite from surface to core is consisted of three different layers, i.e., the top surface compound layer, the interim transitional layer and the bottom carbon steel matrix. A large amount of fine TiB2 and TiC duplex particles are evenly distributed in the composite matrix, while the concentration are significantly decreased and non-uniform distribution increased for these particles in the interim layer.

The Effect of Relative Thickness on Microstructures of TiB2/TiC Particles Reinforced Carbon Steel Matrix Surface Composite

2014 ◽  
Vol 940 ◽  
pp. 3-6
Author(s):  
Chang Qing Guo
Keyword(s):  
Carbon Steel ◽  
Low Cost ◽  
Compound Layer ◽  
Steel Matrix ◽  
Surface Compound ◽  
Relative Thickness ◽  
Surface Composite ◽  
High Temperature Synthesis ◽  
Matrix Surface ◽  
The Matrix

This paper introduces a process that combines a vacuum expandable pattern casting V-EPC with self-propagation high–temperature synthesis SHS of TiB2/TiC particles for fabricating the TiB2/TiC duplex particulates reinforced carbon steel matrix surface composite, and the effect of relative thickness δ on metallurgical quality and microstructures. FeTi-FeB-FeCr system with low cost is adopted as the SHS reactant. Experimental results show that with increasing δ, the surface composite is gradually formed and the metallurgical quality improved. The typical microstructures of the composite from surface to core are consisted of three different layers, i.e., the surface compound layer, the interim transitional layer and the carbon steel base. A certain amount of fineTiB2/TiC particles is distributed in the matrix of the surface compound layer.

The Effect of Ferrous-Titanium Addition on Microstructure of TiB2+TiC Duplex Particles Reinforced Surface Composite with Carbon Steel Matrix

2013 ◽  
Vol 631-632 ◽  
pp. 476-480
Author(s):  
Chang Qin Guo ◽  
Wen Hua Han
Keyword(s):  
Carbon Steel ◽  
Uniform Distribution ◽  
Compound Layer ◽  
Steel Matrix ◽  
Surface Compound ◽  
Titanium Addition ◽  
Surface Composite

This paper presents a fabricating process and microstructural features of TiB2+TiC duplex particulates reinforced surface composite with carbon steel matrix. The effect of ferrous-titanium addition on microstructures is investigated and analyzed. The results showed that the surface compound layer do not exhibit at lower addition, but appear at higher addition. With increasing ferrous-titanium addition, the concentration and size of the synthesized particles at the surface compound layer are decreased, but the tendency of uniform distribution increased.

Fabrication of TiB2/TiC Duplex Particles Reinforced Carbon Steel Matrix Surface Composite

2014 ◽  
Vol 1052 ◽  
pp. 40-44 ◽  
Author(s):  
Chang Qing Guo ◽  
Xiao Yan Hua ◽  
Ji Wei Han
Keyword(s):  
Carbon Steel ◽  
Compound Layer ◽  
Steel Matrix ◽  
Surface Compound ◽  
Temperature Synthesis ◽  
Composite Surface ◽  
Surface Composite ◽  
High Temperature Synthesis ◽  
Matrix Surface ◽  
Micro Structures

A process that combines a vacuum expandable pattern casting V-EPC with self-propagation high-temperature synthesis SHS of TiB2/TiC particles for the fabrication of the TiB2+TiC duplex particulates reinforced carbon steel matrix surface composite are introduced in this paper. The effect of ferrotitanium addition in the SHS reactants on the macro and micro structures as well as hardness is investigated. It has been found that with the increase of ferrotitanium addition, the concentration of synthesized particles in the layer gradually increases to maximum, then decreases. The hardness gradually decreases from the surface compound layer to core and the maximum hardness of 1682HV is obtained on the composite surface.

The Effect of Different Tungsten-Containing Materials Addition on the Reinforcements in the Surface Compound Layer with Steel Substrate

2014 ◽  
Vol 651-653 ◽  
pp. 128-132
Author(s):  
Chang Qing Guo ◽  
Xiao Ping Liu
Keyword(s):  
Carbon Steel ◽  
Optical Microscopy ◽  
Steel Substrate ◽  
Compound Layer ◽  
Experimental Results ◽  
Surface Compound ◽  
Bearing Materials

The effect of different tungsten-bearing materials addition in a surface preform, such as Ni-base WC particles, ferrotungsten powders and casting WC particles, on the reinforcement phases at the surface compound layer with a carbon steel substrate is investigated under the condition of vacuum expandable pattern casting V-EPC. The microstructures and reinforcement phases are characterized by optical microscopy, SEM and EDS. Experimental results show that it is impossible to synthesize the independent WC particles in each condition. The tungsten-containing materials are all inclined to decompose during steel infiltration and the released tungsten elements tend to combine with carbon to form fish born-like or strip-like WC or W2C carbides and dissolve in other type of carbides and matrix.

Microstructural Observation of SiC Surface Alloyed Carbon Steel

2011 ◽  
Vol 308-310 ◽  
pp. 2565-2568
Author(s):  
Chang Qing Guo
Keyword(s):  
Casting Process ◽  
Compound Layer ◽  
Optical Microscope ◽  
Carbon Steels ◽  
Expanded Polystyrene ◽  
Surface Compound ◽  
Polystyrene Spheres ◽  
Transitional Layer ◽  
Sic Particles ◽  
Fine Pearlite

EPS (expanded polystyrene spheres) template with a 5 mm coating on a surface that is mainly consisted of SiC particles are prepared. Carbon steels are then poured in the templates using V-EPC (Vacuum Expandable Pattern Casting) process. The microstructures are observed and analyzed using optical microscope, SEM and EDS. Macrostructural observation showed that the surface alloyed zone is dense and there are no obvious defects, such as gas bubbles, occluded gas holes and delimitation. Microstructural investigations indicated that the samples from top to bottom are obviously consisted of three different layers, i.e., the surface compound layer, the interim transitional layer and the bottom matrix layer. SiC particles are totally decomposed during infiltration. The microstructures in the surface compound layer are consisted of a large amount of graphite flakes, carbides, Si rich ferrites and dendritic pearlites. There is a fine pearlite strip at the top of the transitional layer and small amounts of carbide particles within the matrix grains and net carbides at the grain boundaries can be also observed in this layer.

An Investigation on Erosion Wear Characteristics of SiC Particle Reinforced Steel Matrix Surface Composite

2009 ◽  
Vol 620-622 ◽  
pp. 323-326
Author(s):  
Zhi Guo Xing ◽  
Zhen Lin Lu ◽  
Yong Xin Zhou ◽  
Jian Liu
Keyword(s):  
Cast Iron ◽  
Steel Matrix ◽  
Erosion Wear ◽  
Slurry Erosion ◽  
High Chromium Cast Iron ◽  
Surface Composite ◽  
Matrix Surface ◽  
Reinforced Steel ◽  
Chromium Cast Iron ◽  
Sic Particle

The erosion wear characteristics of SiC particles reinforced steel matrix surface composite were studied by self-made slurry erosion wear test apparatus with quartz slurries, and contrasted with that of plain carbon steel, high chromium cast iron and low chromium cast iron. The results indicated that the erosion wear rate of the four tested materials has the different changes not only with the quartz particles sizes in slurry, but also with the erosion angle of slurry. The erosion wear rate of SiC particle reinforced steel matrix surface composite is the lowest in four kinds of tested materials under the test conditions. And that of high chromium cast iron is less than that of low chromium cast iron under the same test conditions. The SiC particles embedded the steel matrix could prevent the steel surface from wear brought by quartz particles in slurry erosion wear, and protect the steel matrix, so that the erosion wear resistance of steel matrix could be increased.

scholarly journals Dynamic Characteristics Study for Surface Composite of AMMNCs Matrix Fabricated by Friction Stir Process

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1240 ◽  
Author(s):  
Essam Moustafa
Keyword(s):  
Dynamic Properties ◽  
Processing Parameters ◽  
Damping Capacity ◽  
Dynamic Characterization ◽  
Composite Matrix ◽  
Composite Surface ◽  
Friction Stir ◽  
Surface Composite ◽  
Matrix Surface ◽  
Number Of Passes

In the present work, Aluminum Metal Matrix Surface Nano Composites (AMMSNCs) were manufactured using Friction Stir Processing (FSP). Moreover, the fabricated surface composite matrix was exposed to a different number of tool passes with different processing parameters. The tensile test and microstructure examinations were used to study the mechanical properties of the composite surface. The dynamic properties were predicted using modal analysis and finite element methods. After this, dynamic characterization was achieved by combining the numerical and experimental methods to investigate the effects of changing the number of passes on the natural frequency and the damping capacity of the AMMSNCs manufactured using FSP. The results indicated that the damping capacity and dynamic behavior improved with an increased number of FSP passes.

Interfacial Bonding Behavior of Stainless Steel / Carbon Steel in Cold Rolling Process

2020 ◽  
Vol 982 ◽  
pp. 121-127
Author(s):  
Shuo Li ◽  
Qing Dong Zhang
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Great Influence ◽  
Rolling Process ◽  
Interfacial Bonding ◽  
304 Stainless Steel ◽  
Nanoindentation Test ◽  
Real Contact Area ◽  
Steel Matrix ◽  
Bonding Quality

A cylindrical indenter was designed to simulate the roller and 304 stainless steel / Q235A carbon steel plate with different roughness were bonded together. The interfacial bonding behavior was investigated by SEM, ultrasonic “C” scanning detection and nanoindentation test. The result reveal that with the increase of contact pressure between interfaces, the atoms of dissimilar metals begin to diffuse across interfaces in some regions, then form island-like bonding regions, and eventually extend to the whole interface. There are no obvious cracks on the surface of stainless steel and carbon steel after deformation. The cold roll-bonding mechanism of stainless steel and carbon steel is that elements on both sides of the interface diffuse and form a shallow diffusion layer under pressure to ensure the joint strength, and the joint bonding strength is greater than the strength of carbon steel matrix. In addition, the surface morphology of base metal has a great influence on the interfacial bonding quality. The higher surface roughness values increases the hardening degree of rough peak, which makes real contact area difficult to increase and reduce the interfacial bonding quality.

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