A model is developed to calculate the composition of reoxidation inclusions that form during pouring of steel castings. The software package Thermo-Calc is used to obtain the inclusion phase fractions and compositions as a function of the temperature and oxygen content of the steel. Oxygen is assumed to be continually absorbed by the steel until the liquidus temperature is reached. Both lever r...

This paper presents a study to evaluate the mechanical properties of commercially available GRP composite fasteners for the fairing band assembly components of the hull mounted sonar domes on Canadian frigates. The study was undertaken as part of an effort to develop an all-composite fairing band assembly for a stainless steel sonar dome, to eliminate corrosion problems that occur with the use ...

There are multitudinous, multispecies, nonlinearity, multiphase and so on complex system time and space scales characteristics in steel plate production process, whose defects are divided into dominant defects and hidden defects. Real-time dynamic steel plate defects information can not be effectively and quickly converted, it is difficult to find the relationship among defects facts, defects r...

Article history: Received 10.9.2012 Received in revised form 10.12.2012 Accepted 10.12.2012 27SiMn steels with different original structures were zero time holding quenched after pretreatments including general quenching and normalizing, respectively, then their tensile strength and hardness were determined and also microstructures were analyzed.. The experimental results show that thus quenche...

This study investigates the seismic behavior of deconstructable composite steel/concrete floor systems consisting of precast concrete planks and deconstructable clamping connections attaching the planks to the steel floor beams. The system is proposed to promote sustainable design of composite steel/concrete floor systems in steel buildings via reuse of the structural steel and concrete compone...

The corrosion of carbon steel in the chloride-dominated groundwaters anticipated inside a failed spent fuel waste container has been studied in the presence of small concentrations of added hydrogen peroxide. Solutions with peroxide concentrations in the micro-molar range were found to accelerate steel corrosion slightly leading to the formation of Fe-containing corrosion product deposits but n...

The quality of the steel surface is a crucial parameter. An improved method based on machine vision for steel surface defects detection is proposed. The experiment is based on 20 images for each of 6 distinct steel defects, a total of 120 defective images achieved from the detection system. 128 different features are extracted from the images and feature dimensions are reduced by the principle ...

In order to study the problem of surface fluctuations and slag entrapment, the nail board experiment and simulation computation method was used to optimize the method for measuring liquid level characteristics in mold. The influence of steel nails diameter and the distance between steel nails on the measurement results was studied. The height of the liquid surface and the surface velocity at di...

Over one-quarter of steel produced annually is used in the construction of buildings. Making this steel causes carbon dioxide emissions, which climate change experts recommend be reduced by half in the next 37 years. One option to achieve this is to design and build more efficiently, still delivering the same service from buildings but using less steel to do so. To estimate how much steel could...

In this article boron steel is analyzed on the example of steel grade B27. In view of the fact that steel is supplied in a state after hot rolling, and the choice of a suitable heat treatment is left to the buyer steel were examined after conventional heat treatments. Steel was studied in state as delivered, after normalization, after quenching and after quenching and tempering at different tem...