Microstructure and Mechanical Properties of In Situ WC Particles Reinforced Iron-Based Composite Coating

2011 ◽  
Vol 194-196 ◽  
pp. 1803-1806
Author(s):  
Yong Hong Fu ◽  
Li Bin Niu
Keyword(s):  
Cast Iron ◽  
Composite Coating ◽  
Gray Cast Iron ◽  
Centrifugal Casting ◽  
Fracture Morphology ◽  
Gray Cast ◽  
In Situ Techniques ◽  
The Matrix ◽  
Iron Based

A kind of centrifugal casting plus in situ techniques of fabricating iron-based composite coating reinforced by tungsten carbide (WC) particles was developed. The experimental results show that the reinforcing particles were generated by reaction between dissolved tungten wires and carbon from gray cast iron molten. The composite coating mainly consists of primary WC carbides, some fine secondly WC carbides as the reinforcing phase and pearlite accompanied by negligible graphite flakes as the matrix. Compared with the unreinforced gray cast iron, the in situ synthesized WC particles can enhance the ultimate tensile strength and decrease elongation rate of the composite coating. Fracture morphology reveals that fracture mode of composite coating is brittle and ductile mixed fractures, the fracture mechanism of the composite is not only related with the introduction of reinforcement but also with the reduction of graphite flakes in the matrix

Study on the (Fe,Cr)7C3 Particles Reinforced Iron-Based Composite Coating

2014 ◽  
Vol 809-810 ◽  
pp. 569-572
Author(s):  
Li Bin Niu ◽  
Zhen Xu ◽  
Jian Hong Peng
Keyword(s):  
Cast Iron ◽  
Composite Coating ◽  
Composite Coatings ◽  
Centrifugal Casting ◽  
Energy Dispersive Spectrum ◽  
Optical Microscope ◽  
Ductile Cast Iron ◽  
In Situ Techniques ◽  
Pin On Disc ◽  
Iron Based

An iron based composite coating reinforced by (Fe,Cr)7C3particles, with a thickness of 4.0 mm, was fabricated on the ductile cast iron substrate by means of a centrifugal casting and in situ techniques. The microstructure and properties of the composite coatings were investigated by optical microscope, X-ray diffraction, scanning electron micrograph, energy dispersive spectrum, microhardness tester and pin-on-disc wear tester. Results show that the composite coatings consists of primary (Fe,Cr)7C3carbides as the reinforcing phase and interdendritic (Fe,Cr)7C3/γ eutectics accompanied by negligible graphite nodules as the matrix. The reinforcements are metallurgical bonded to the ductile cast iron substrate. Compared with unreinforced ductile cast iron, the composite coatings offer virtually a unique wear resistant behaviour under the condition of dry sliding with loads.

Laser Alloying in-situ Carbide Particle Reinforced Composite Layers on the Gray Cast Iron with Ni-base Powder

Applied laser ◽  
2010 ◽  
Vol 30 (4) ◽  
pp. 249-253
Author(s):  
郑伟 Zheng Wei ◽  
马明星 Ma Mingxing ◽  
朱有慧 Zhu Youhui ◽  
张伟明 Zhang Weiming ◽  
孙康和 Sun Kanghe ◽  
...  
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Carbide Particle ◽  
Gray Cast ◽  
Laser Alloying ◽  
Base Powder ◽  
Reinforced Composite ◽  
Composite Layers ◽  
Particle Reinforced Composite

Friction and wear behavior of TaC ceramic layer formed in-situ on the gray cast iron

2019 ◽  
Vol 135 ◽  
pp. 181-188 ◽  
Author(s):  
Nana Zhao ◽  
Yurong Zhao ◽  
Yiqi Wei ◽  
Xin Wang ◽  
Jie Li ◽  
...  
Keyword(s):  
Cast Iron ◽  
Friction And Wear ◽  
Gray Cast Iron ◽  
Wear Behavior ◽  
Ceramic Layer ◽  
Gray Cast ◽  
Friction And Wear Behavior

137 Nondestructive Evaluation of Chill Content in Gray Cast Iron Based on AC Magnetization Method

2007 ◽  
Vol 2007.42 (0) ◽  
pp. 73-74
Author(s):  
Jun MATSUKAWA ◽  
Tetsuya UCHIMOTO ◽  
Toshihiko ABE ◽  
Toshiyuki TAKAGI ◽  
Takeshi SATO ◽  
...  
Keyword(s):  
Cast Iron ◽  
Nondestructive Evaluation ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Iron Based ◽  
Ac Magnetization

scholarly journals Wear Behavior and Its Correlation with Mechanical Properties of TiB2Reinforced Aluminium-Based Composites

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
N. B. Dhokey ◽  
K. K. Rane
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Wear Behavior ◽  
Gray Cast ◽  
Synthesis Process ◽  
Reinforced Composite ◽  
Cast Composites ◽  
Made In

Aluminium-based TiB2reinforced composite is a promising material to be used as brake drum material, and it may emerge as substitute for conventional gray cast iron. Aluminium-based composites containing 2% by wt copper reinforced with 2.5 and 5 wt% TiB2composites were made in induction furnace by in situ synthesis process using simultaneous addition of halide fluxes (K2TiF6and KBF4). These cast composites were evaluated for microstructures, hardness, flow curve properties, and tensile properties. It was observed that overall wear behavior gave reasonably good correlation with mechanical properties of composites as compared to gray cast iron.

In Situ Observation of Semisolid Fe-2.5C-1.5Si Gray Cast Iron

2016 ◽  
Vol 256 ◽  
pp. 63-68
Author(s):  
Davi Munhoz Benati ◽  
Kazuhiro Ito ◽  
Kazuyuki Kohama ◽  
Hajime Yamamoto ◽  
Eugênio José Zoqui
Keyword(s):  
Cast Iron ◽  
Liquid Phase ◽  
Laser Scanning ◽  
Gray Cast Iron ◽  
Solid Phase ◽  
Laser Scanning Confocal Microscopy ◽  
Raw Material ◽  
Gray Cast ◽  
Heating Process

Fe-2.5C-1.5Si gray cast iron evaluated in previous works exhibited promising potential as semisolid raw material presenting low levels of maximum stress and viscosity, similar to Al-Si alloys. This work is intended to investigate phase transformations and liquid phase formation for the Fe-2.5C-1.5Si gray cast iron in order to understand the performance of the alloy during the semisolid processing. Thus in situ heating experiments via high temperature laser scanning confocal microscopy were performed to analyze the solid-to-liquid transition. At room temperature alloy presented a matrix of pearlite and ferrite with type D flake graphite. During the heating process the main transformations observed were graphite precipitation on the austenite grain boundaries, graphite precipitates and flakes graphite growing and coarsening with the increasing of temperature and the beginning of melt around 1140°C. Coarsened flakes at high temperatures resulted in a liquid continuous network after melting, thereby the liquid phase was formed surrounding and wetting homogeneously the solid phase. This favors the detachment of grains from each other and leads to the intended solid globules immersed in liquid.

Sign in / Sign up

Export Citation Format

Share Document