77 Result(s)
within
Guo-dong Wang
Manufacturing, Machines, Tools, Processes
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Article
Microstructure Evolution and Property of Spray-Formed Cu-10 wt% Fe Alloy During Cold Rolling
In order to obtain homogeneity and fine-scale microstructure of Cu–Fe alloy, a Cu-10 wt% Fe alloy slab was prepared by spray forming. The effects of cold rolling reduction on the alloy microstructure, mechanic...
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Article
Modeling flow stress and grain size of GCr15 bearing steel at high-temperature deformation near end of solidification
Hot-core heavy reduction rolling is an innovative technology for continuous casting billet at the end of solidification. The deformation characteristics of GCr15 bearing billet were investigated over the tempe...
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Article
Heat transfer characteristics for double-jet in different flow regions on a thick plate
During multi-jet cooling, the complex hydrodynamic characteristics caused by the interaction between jets will affect the heat transfer of the plate. To further clarify the heat transfer characteristics in dif...
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Article
Microstructure and mechanical properties of hot-rolled low-carbon steel containing Ti–Ca oxide particles: a comparison between base metal and HAZ
The effect of inclusion-induced nucleation on hot-rolled steel base metal was evaluated in comparison with welding heat-affected zone (HAZ). Microstructure and mechanical properties of hot-rolled low-carbon st...
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Article
Effect of deformation parameters in unrecrystallization range on microstructural characteristics in Al-bearing hot-rolled TRIP steel
The scanning electron microscope, transmission electron microscope, optical microscope, X-ray diffraction and hardness tests were used to investigate the effect of deformation parameters in unrecrystallization...
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Article
Effects of Processing Variables on Microstructure and Yield Ratio of High Strength Constructional Steels
The process of “controlled rolling+relaxation+ultra fast cooling (UFC)” for high strength constructional steel with low yield ratio was presented. Microstructure and corresponding relationship with low yield r...
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Article
Microstructural evolution and properties of a high strength steel with different direct quenching processes
A high strength low alloy steel with low carbon equivalent was selected for simulating online direct quenching and coiling (DQ-C) process. The influence of stop quenching temperature on mechanical properties a...
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Article
Microstructure and mechanical properties of precipitation strengthened fire resistant steel containing high Nb and low Mo
Through the thermo-mechanical control process (TMCP), a high Nb low Mo fire resistant steel with the yield strength (YS) of 521 MPa at room temperature (RT) and 360 MPa at elevated temperature (ET) of 600 °C w...
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Article
An On-line Finite Element Temperature Field Model for Plate Ultra Fast Cooling Process
Taking the element specific-heat interpolation function into account, a one-dimensional (1-D) finite element temperature field model for the on-line control of the ultra fast cooling process was developed base...
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Article
Influence of Finishing Cooling Temperature and Holding Time on Nanometer-size Carbide of Nb-Ti Microalloyed Steel
The nanometer-size carbides formed in ferrite matrix of Nb-Ti microalloyed steel at different finishing cooling temperatures and holding time have been investigated. The characteristics of nanometer-size carbi...
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Article
Microstructure and Abrasive Wear Behavior of Medium Carbon Low Alloy Martensitic Abrasion Resistant Steel
The effect of processing parameters such as hot rolling and heat treatment on microstructure and mechanical properties was investigated for a new 0. 2 7 mass % C and Ni, Mo-free low alloy martensitic abrasion ...
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Article
Upgrade Rolling Based on Ultra Fast Cooling Technology for C-Mn Steel
By measuring the expansion curves of a C-Mn steel at different cooling rates by using an MMS-300 thermomechanical simulator, continuous cooling transformation curves were obtained. The new process “ultra fast ...
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Article
Effect of Annealing Time on Microstructure and Mechanical Properties of Cold-Roled Niobium and Titanium Bearing Micro-aloyed Steel Strips
Effects of annealing time on microstructure of cold-roled niobium-titanium bearing micro-aloyed steel strips were investigated by optical microscopy, scanning electron microscopy, electron back-scater difracti...
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Article
Effect of Controlled Cooling on Microstructure and Mechanical Properties of H-Beam
Based on ANSYS, an analytical model was established for H-beam during controlled cooling. The temperature fields during controlled cooling and air cooling were analyzed and the microstructure and mechanical pr...
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Article
Impact Toughness of an NM400 Wear-Resistant Steel
An NM400 wear-resistant steel was hot rolled and then the plates were heat-treated by direct quenching and tempering (DQT) and reheat quenching and tempering (RQT) techniques, respectively. The Charpy impact t...
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Article
Development of New Generation Cooling Control System After Rolling in Hot Rolled Strip Based on UFC
Ultra-fast cooling (UFC) is an advanced technology in hot rolling field. Through this technology, great changes on the run-out table are produced in the strip cooling process. In order to adapt to these change...
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Article
Improvement of Hole-Expansion Property for Medium Carbon Steels by Ultra Fast Cooling After Hot Strip Rolling
The improvement of hole-expansion properties for medium carbon steels by ultra fast cooling (UFC) after hot strip rolling was investigated. It was found that finely dispersed spherical cementite could be forme...
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Article
Heat Transfer During Quenching by Plate Roller Quenching Machine
For plate quenching on a roller quenching machine, heat transfer process is investigated. According to the practical online experiment of plate center temperature, average heat transfer coefficient under diffe...
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Article
Limit Analysis of Defect-Free Pipe Elbow Under Internal Pressure With Mean Yield Criterion
With mean yield (MY) criterion, an analytical solution of the collapse load for a defect-free pipe elbow under internal pressure is first obtained. It is a function of ratio of thickness to radius t0/r0, strain h...
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Article
Effects of Tempering Temperature and Mo/Ni on Microstructures and Properties of Lath Martensitic Wear-Resistant Steels
The tempering behavior was experimentally studied in lath martensitic wear-resistant steels with various Mo/Ni contents after tempering at different temperatures from 200 to 600 C. It is shown that a good comb...
