In this study, direct laser deposition (DLD) of nickel-based superalloy powders (Inconel 625) on structural steel (42CrMo4) was analysed. Cladding layers were produced by varying the main processing conditions: power, scanning speed, feed rate, and preheating. The window established based conditions that assured deposited without significant defects a dilution between 15 30%. Scanning electron ...

Nonmetallic inclusions are harmful to the quality of 42CrMo4 steel. Therefore, formation and removal mechanism in steel during steelmaking process is investigated by industrial trials. The characteristics specimens were analyzed scanning electron microscopy energy dispersive spectroscopy. main type molten early stage ladle furnace (LF) refining MgO-Al2O3 irregular shape. CaO begins appear middl...

The influence of hydrogen on the mechanical behavior a quenched and tempered 42CrMo4 steel has been evaluated by means high internal pressure fracture tests carried out precharged notched cylindrical specimens. specimens were in 1 M H2SO4 + 0.25 g/l As2O3 solution for 3 h with 1.2 mA/cm2. Hydraulic performed at different loading rates. Hydrogen embrittlement resistance increased grain size refi...

The article presents an innovative method of forming hollow rail axles by cross rolling (CR) in a 3-roll mill. Assessing the correctness concept was conducted with numerical simulations Forge® NxT v.3.0. In order to investigate whether limitation form material cracking would occur analysed process critical values damage function for 42CrMo4 grade steel were determined. A new calibrating test, b...

Low-alloy 42CrMo4 steels were studied by 57Fe Mössbauer spectroscopy (MS), X-ray diffractometry (XRD), and Energy Dispersive Spectroscopy (EDS) measurements. The investigations performed on metallographic samples, which subjected to a series of successive grinding polishing with progressively finer grit. Conversion (CXMS) was used determine the occurrence austenite in steel samples. It is uniqu...