The microstructure obtained as the weld cools from the liquid phase to ambient temperature is called the as–deposited or primary microstructure. Its major components include allotriomorphic ferrite, Widmanstätten ferrite, and acicular ferrite (Fig. 1). There may also be some martensite, retained austenite or degenerate pearlite. These latter phases occur in very small fractions, and are known b...

In this research (using induction furnace process) nodular iron with three different percentages of copper (residual, 0.5% and 1,2%) was obtained. Chemical analysis was performed by mass spectrometry and microstructures were characterized by Optical Microscopy (ASTM E3) and Scanning Electron Microscopy (SEM). The study of mechanical behavior was carried out in a mechanical test machine (ASTM E8...

Pack carburizing is a method of surface hardening steel which carried out by diffusing carbon into the material where initially solid. This study aims to determine effect pack treatment on microstructure and hardness AISI 1010 steel. The was then cooled slowly in oven temperatur 150oC followed air cooling. Single Quenching reheating temperature 870oC holding it at that for 60 minutes. done cool...

3 IMR KINKEN Research Highlights 2012 IMR KINKEN Research Highlights 2012 To reduce the fuel consumption by automobiles, medium carbon steels for forging parts, such as shafts and connecting rods, must be further strengthened. When carbide-forming elements such as Ti, Nb, and V, are alloyed with carbon steels, a fine dispersion of alloy carbides and large precipitation hardening can be achieved...

In today’s era of plasma and laser cutting, machines using oxy-acetylene flame are also meritorious due to their simplicity and cost effectiveness. The objective to devise a Computer controlled Oxy-Fuel profile cutting machine arose from the increasing demand for metal cutting with respect to edge quality, circularity and lesser formation of redeposit material. The System has an 8 bit micro con...

the effects of steel wire patenting process parameters on very fine interlamellar spacing in the pearlitic steel wire were investigated and the optimized condition of the process was achieved. in this work, the initial nanopearlitic structure was obtained in a 0.72 wt% carbon steel wire before the wire drawing process. the results were the minimum interlamellar spacing of 35 nm and maximum ulti...

In this study, we performed scanning transmission X-ray microscopy with a spatial resolution of approximately 50 nm to investigate the two-dimensional mapping chemical states carbon in Fe–C alloy. The lamellar texture (pearlite) consisting ferrite (α-Fe) and θ-Fe3C an interval 100 was identified by absorption from 1s→2p excitation image. It clearly observed that there exist more than two types ...

This paper investigates how electrolytic plasma hardening (PEH) bears upon the changes in phase structural and tribological properties of steel 0.34C-1Cr-1Ni-1Mo-Fe, which is widely used manufacturing highly stressed gears. The samples 0.34C-1Cr-1Ni-1Mo-Fe went through PEH an electrolyte containing aqua solution 20% calcined soda (Na2CO3) 10% carbamide ((NH2)2CO). initial stated to have followi...