The term San Mai is used for the manufacture of knife blades consisting three layered steel composites. middle layer, which forms cutting edge, consists hard and on outside a soft stainless forged. Mr. Benjamin Kamon, an Austrian blacksmith, provided examined sample. Three different steels thin Ni layer are symmetrically connected (1.4301/1.3520/Ni/1.2519/Ni/1.3520/1.4301). cold work (1.2519) t...

Abstract During the operation of a boiler in power plant, water wall tube burst and leaked. In order to find out reason rupture, comprehensive experimental study was made on sample with macro morphology, chemical composition, metallography, SEM EDS. The results show that due high sulfur content combustion medium boiler, large amount sulfate containing elements will deposit outer during long-ter...

The applicability of flowdrill technology to join steel and aluminum alloys is studied. When used two overlapped thin-walled materials, a joint formed as secondary effect. quality the resulting bushings forming interference fit was investigated by metallography. joints were using combination uncoated deep drawn steel, galvanized high-strength low alloy alloy, in different positions joint. Subse...

The local approach to fracture (LAF) is a methodology aimed to calculate macroscopic fracture properties of a body, from the knowledge of the local stress strain field at the fracture site, and the modeling of the acting fracture mechanisms. In the present work, this method was applied to a CF8M steel, aged 30000 h at 325 °C, in order to elucidate if LAF could be able to describe the measured f...

The aim of this work was to study the corrosion behavior a Fe-Cr-Ni alloy (310 H stainless steel) in water at supercritical temperature 550 °C and pressure 250 atm for up 2160 h. At temperature, is highly aggressive environment, structural materials used water-cooled nuclear reactor (SCWR) critical problem. Selecting proper candidate one key issue development SCWRs. After exposure deaerated wat...

Pipelines are important in geothermal and most of the pipe materials carbon steel insulated. Pipe insulation that is often used general prone to wetness, heat loss, corrosion. Corrosion a problem especially Under Insulation (CUI). This corrosion results pipeline leakage. The selection nano-tech way overcome CUI extend service life usage. study JIS S45C 1×1 cm insulated with nanotechnology by dr...

The use of Fe-Al intermetallic compound coatings has been investigated in order to improve the tribological behaviour of carbon tool steel. The coatings were formed by a pack cementation process and subsequently diffusion annealing at 900˚C in an argon controlled atmosphere. The optimum diffusion time was selected on the basis of optimum thickness and tribological behaviour.&#10The microstructu...

Purpose. Determination of the conditions for disappearance a section intermittent flow and its effect on strain hardening low-carbon steel.
 Actuality. The use low carbon steels with stamping has significant limitation. Based this, issues ferrite grain size occurrence are relevant determining optimal structural state intended deep drawing.
 Research methods. structure samples was stud...