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Yu L.-Y.,University of Sichuan | Yu L.-Y.,Sichuan Colleges and Universities | Luo H.,University of Sichuan | Luo H.,Sichuan Colleges and Universities | Liu L.,University of Sichuan
Corrosion and Protection | Year: 2010

In order to study the pitting corrosion of 2205 duplex stainless steel(2205DSS) in 0. 5 mol/L and 1 mol/L HCl solution, the pitting corrosion morphology of 2205DSS in 0. 5 mol/L and 1 mol/L HCl solutions were analyzed by atomic force microscope (AFM) at different time; potentiodynamic polarrization curves were tested to evaluate the pitting corrosion resistance of 2205DSS in 0. 5 mol/L and 1 mol/L HCl solutions. The results indicated that 2205DSS had good pitting corrosion resistance in HCl solution.


Wang J.,Sichuan Colleges and Universities | Fu S.,Chengdu Electromechanical College | Jiang B.,Chengdu Electromechanical College | Wang Y.,Sichuan University
Advanced Materials Research | Year: 2012

(Ti, W) C particles reinforced Fe-based surface composite coatings were fabricated by in-situ synthesis and powder metallurgy route. The microstructure, interface and wear properties were investigated by X-ray diffraction, scanning electron microscopy and dry sliding wear test. The results show that (Ti, W) C carbides form via in situ reaction between titanium, ferrotungsten and graphite. The morphology of (Ti, W) C is mainly rectangular form. The interface between (Ti, W) C and iron matrix is found to be free from cracks and deleterious phases. The coating reinforced by (Ti, W) C particles possesses higher wear resistance than that of the substrate. © (2012) Trans Tech Publications.


Wang J.,Sichuan Colleges and Universities | Fu S.,Chengdu Electromechanical College | Jiang B.,Chengdu Electromechanical College | Wang Y.,Sichuan University
Advanced Materials Research | Year: 2012

This study dealt with the processing, microstructure and wear behavior of vanadium carbide reinforced iron matrix composite. Powder technology combined with in situ synthesis was used to successfully fabricate the composite. The microstructure of the composite was characterized by X-ray diffraction, scanning electron microscope and transmission electron microscope. The microstructural study reveals that the round VC particles are distributed uniformly in the iron matrix, the interface between the iron matrix and VC is clean, and no interface precipitates is found. Dry-sliding wear behavior of VC-Fe composite was tested using MM-200 wear testing machine. The results indicate that the composite has excellent wear resistance, and microploughing and grooving are the dominant wear mechanisms for the composite. Hardness and bend strength of the composite are 62HRC and 990.1MPa, respectively. © (2012) Trans Tech Publications.


Wang J.,Sichuan Colleges and Universities | Fu S.,Chengdu Electromechanical College | Li Y.,Sichuan Colleges and Universities
Advanced Materials Research | Year: 2012

A powder metallurgy technique combined with in-situ synthesis technique was applied to produce (Ti,W)C particulates reinforced iron matrix composite. The sintered composites were characterized by X-ray diffraction and scanning electron microscopy. (Ti,W)C and α-Fe were detected by X-ray diffraction analysis. The scanning electron micrographs revealed the morphology and distribution of the reinforcements. The results show that the rectangular (Ti,W)C carbides are distributed uniformly in the composite. The (Ti,W)C/Fe matrix interface is found to be free from cracks and deleterious phases. The reasons for the formation of coarse (Ti,W)C particles were also discussed. © (2012) Trans Tech Publications.


Wang J.,Sichuan Colleges and Universities | Fu S.,Chengdu Electromechanical College | Gao R.,Chengdu Electromechanical College
Advanced Materials Research | Year: 2012

This study dealt with the formation mechanism and microstructure of titanium carbide particulate reinforced Fe-based composite. The microstructure of the composite was characterized by scanning electron microscopy (SEM), the microstructural study reveled that the TiC particles were distributed uniformly in the iron matrix, and TiC particles had various morphology. The formation mechanism of titanium carbide was also investigated by differential thermal analysis (DTA) and X-ray diffraction(XRD). The experimental results indicated that titanium carbide formed at 1138.2°C. © (2012) Trans Tech Publications.


Wang J.,Sichuan Colleges and Universities | Fu S.,Chengdu Electromechanical College | Ding Y.,Sichuan Colleges and Universities | Wang Y.,Sichuan University
Advanced Materials Research | Year: 2012

A wear resistant TiC-Cr 7C 3 /Fe surface composite was produced by cast technique and in-situ synthesis technique. The microstructure and dry-sliding wear behavior of the surface composite was investigated using scanning electron microscope(SEM), X-ray diffraction(XRD) and MM-200 wear test machine. The results show that the surface composite consists of TiC and Cr 7C 3 as the reinforcing phase, α-Fe and γ-Fe as the matrix. The surface composite has excellent wear-resistance under dry-sliding wear test condition with heavy loads.


Wang J.,Sichuan Colleges and Universities | Fu S.,Sichuan Colleges and Universities | Jiang S.,Engineering Training Center | Cheng H.,Sichuan Colleges and Universities
Advanced Materials Research | Year: 2012

High manganese matrix composite, reinforced by TiC particles, was synthesized in situ by means of conventional powder metallurgy route. The microstructure was investigated by means of Scanning electron microscopy. Pin-on-disc dry sliding wear tests had been carried out to study the wear behavior of TiC-reinforced high manganese steel matrix composites. The results show that TiC carbides are distributed uniformly in the composite. The abrasive wear resistance of the composites is higher than that of the unreinforced high manganese steel. © (2012) Trans Tech Publications, Switzerland.


Jin Y.,University of Sichuan | Jin Y.,Sichuan Colleges and Universities | Ye F.,University of Sichuan | Huang B.,University of Sichuan | Yang R.,University of Sichuan
Nanoscience and Nanotechnology Letters | Year: 2012

VC-Cr3C2 nanocomposite powders with 20-100 nm were synthesized from precursors by vacuum carbothermal reduction at 900 °C for 2 h. The phase composition of the synthesized products with various ratios of chromium and vanadium was investigated systemically. The present study shows that there are not single-phase VC and Cr3C2 in VC-x wt% Cr3C2 (with 10 ≤ × ≤ 90) nanocomposite powders. When low-concentration V or Cr element exists in the reaction system, (V, Cr) C or (Cr, V)3C2 solid solution phase forms easily but the solubility of Cr atoms in VC lattices is larger than that V atoms in Cr3C2. With the increase of Cr addition, there is a shifting trend of (V, Cr) C diffraction peaks toward higher angle. Two phases of (V, Cr) C solid solution and Cr2VC2 compound exist in VC-50 wt% Cr3C2 and VC-70 wt% Cr3C2 system. Copyright © 2012 American Scientific Publishers.


Yu L.-Y.,University of Sichuan | Yu L.-Y.,Sichuan Colleges and Universities | Luo H.,University of Sichuan | Luo H.,Sichuan Colleges and Universities | And 2 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2010

The effect of different heat treatments on properties of the 2205 duplex stainless steel (2205DSS)-16MnR steel clad plates were investigated through the mechanical properties test and the corrosion rate examination. The results show that the tensile strength and yield strength of the annealing plates are over 490 MPa and 325 MPa respectively, more than that of the explosive state. The elongation and impact property at 0 °C of the annealing plates are also over that of the explosive state. The maximum corrosion rate is 1. 15 mg/dm 2 -d( mdd) which accorded with the ASTM A923 standard.


Hong L.,University of Sichuan | Hong L.,Sichuan Colleges and Universities | Lan-Ying Y.,University of Sichuan | Lan-Ying Y.,Sichuan Colleges and Universities | And 3 more authors.
Metal Science and Heat Treatment | Year: 2010

Corrosion resistance, structure, phase composition, and microhardness of aluminized layer on steel TP347H are studied. Aluminum saturation of the surface of stainless steel TP347H is performed from a solid-phase source in a chamber furnace at 900°C for 6 h. The properties of the aluminized layer are studied using the methods of light and scanning electron microscopy, energy dispersive x-ray spectrum analysis, x-ray diffractometry, and measurement of microhardness. © 2010 Springer Science+Business Media, Inc.

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