Surface defect classification plays an important role in the assessment of production status and analyzing possible causes hot rolled strip steel. It is extremely challenging owing to rare occurrence various appearances defects. In this work, improved deep learning model proposed solve problem poor accuracy when only a few labeled samples can be available. Different from most inductive small-sa...

In order to satisfy the rudder horn casting standards of the International Association of Classification Societies, the properties of ASTM A216 steel should be improved. Therefore, in this article the rudder horn casting and accompanying specimens were cast moulded by arc furnace smelting, external refining, and modification treatment of the molten steel by lanthanum. The samples were first und...

The fatigue strength of flapper valves depends among other things on surface properties of the steel. This paper deals with the effect of a tumbling method*) on bending and tensile fatigue properties of test bars. For carbon steel SANDVIK 20C an improvement was observed in several test series, particularly in the transverse direction of the strip, whereas there was little effect for stainless s...

In the present work, the effects of chemical compositions on the hydrogen blistering and hydrogen induced cracking of A350LF2 steel with different S contents were studied. Four types of A350LF2 steels were evaluated by immersing samples in H2S-saturated NACE solution. The hydrogen blistering, crack length rate(CLR), crack thickness rate(CTR) and crack sensitivity rate(CSR) were evaluated. The r...

A holistic assessment of inclusions present within a cold rolled DP800 steel was performed. The comprised variety methods including optical microscopy and image processing, alongside quantitative, statistical analysis. ‘statistics extreme values’ approach applied, utilising outputs from microstructural qualitative analysis followed via the use SEM EDS to determine morphologies compositions mate...