89 Result(s)
within
Guo-dong Wang
Metallic Materials
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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...
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Article
Evolution of Through-Thickness Texture in Ultra Purified 17 %Cr Ferritic Stainless Steels
Texture inhomogeneity usually takes place in ferritic stainless steels due to the lack of phase transformation and recrystallization during hot strip rolling, which can deteriorate the formability of final she...
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Article
Optimal Heating in Heat-Treatment Process Based on Grey Asynchronous Particle Swarm Optimization
To ensure plate heating quality and reduce energy consumption in heat-treatment process, optimal heating for plates in a roller hearth furnace was investigated and a new strategy for heating procedure optimiza...
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Article
Rolling With Simplified Stream Function Velocity and Strain Rate Vector Inner Product
The dual-stream function velocity field is reduced in order to analyze two-dimensional plate broadside rolling in roughing. The strain rate vector inner product and integral mean value theorem, as well as co-l...
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Article
Microstructure Evolving Behaviors of Undercooled Ultrafine Austenite Grains During Deformation
Samples with ultrafine grained austenite were prepared by repetitive rapid heating and quenching for three times and were used to investigate the dynamic microstructural evolving behaviors at different tempera...
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Article
Crack Properties of Lean Duplex Stainless Steel 2101 in Hot Forming Processes
The crack behavior of LDX 2101 by hot compression tests in the temperature range of 950 to 1 150 °C and strain rate range of 0.01 to 30 s−1 was studied. The hot workability map of LDX 2101 was constructed and the...
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Article
Formation of Phosphorous Surface Inverse Segregation in Twin-Roll Cast Strips of Low-Carbon Steels
The formation of phosphorous surface inverse segregation (SIS) in twin-roll cast strips of low-carbon steels was studied. High phosphorous strips were fabricated by using a pilot twin-roll strip caster and a m...
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Article
Effects of twin-dislocation and twin-twin interactions on the strain hardening behavior of TWIP steels
Tensile tests of Fe-30Mn-5Si-2Al steel were carried out for different strains of 0.05, 0.14, 0.26, and up to the strain-to-failure in order to observe the evolution of microstructure during deformation and inv...
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Article
Development of Ti-Microalloyed 600 MPa hot rolled high strength steel
A high strength steel with yield strength on the order of 600 MPa was developed successfully with only addition of titanium alloying element based on a low-carbon steel. The results showed that the hot deforma...
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Article
Effect of phosphorus on the microstructure and mechanical properties of strip cast carbon steel
Carbon steel strips with different phosphorus and carbon contents were produced by using the twin roll strip casting process. Fine grains and dendrite structure were observed in high-P steels. Negative phospho...
