Forging dies at high temperatures are under contact pressure, variable mechanical loads and thermal shock, furthermore they should withstand wear and friction in a high level. So, in order to increase die life, the selection of die material, coating and hardness is essential. In this review, various methods used for die life enhancement such as carbide coating, using the super alloy stellite 6 ...

The use of echocardiography, phonocardiography, and spectroanalysis has enhanced the ability to detect prosthetic valve dysfunction even before the onset of symptoms in many patients. Reduction in the intensity of the opening and closing clicks and the appearance of new murmurs have been the most frequently reported observations in predicting prosthetic valve dysfunction. Simultaneous echocardi...

The article describes problems of welding heterogeneous welds be specific heat resistant steel X15CrNiSi20-25 with cobalt alloy Stellite 6. Heterogeneous are produced by GTAW (141 according to standard EN ISO 4063) method. major goals the experiment were performing preliminary specifications (pWPS) for a welded part. Further was necessary this weldment set parameters on mechanical testing.

In this work, we accomplished the crack-free directed energy deposition (DED) of a multi-layer Cobalt-Chromium alloy coating (Stellite 21) on Inconel 718 substrate. Stellite alloys are used as materials given their resistance to wear, corrosion, and high temperature. The main challenge in DED coatings is proclivity for crack formation during printing. objective work characterize effect input de...