metalurgy lab report
By: Bahredin Ali Muzeyin
Materials Engineering Department
Adama Science and Technology University
MAEng3301
October 15,2013
Abstract
Deferent carbon content steel examined to determine the microstructure, concentration and hardness of the specimens. 0.2% C, 0.4% C and 1.0% C steel specimens were prepared by cutting. Abrasive cutter was used to cut the steels. Furnace was used for heat treatment at 900°C to make the phases separate when seen by microscope. Mounting press was use to mount the specimen to make it suitable for handling at the time of grinding and polishing. Different kind of sand paper was used to grind and make smooth the spacmens and finally polishing cloth with diamond suspension was used to remove the extra scrachs . to diffrantiate the grain boundaries it was etched by nital solution. Finally the first observation was taken made by optical microscope and scanning electron microscope.
Introduction This paper contains some important experiment results concerning metals properties. The main aim of the laboratory experiment was to examine and to compare the microstructure and hardness of different carbon content metals, starting from 0.2%C, 0.4%C, 1.0C% content metals with different heat treatment and cooling mechanism. The experiment was started from the preparation of the samples. At the first step the samples was prepared by cutting in appropriate size by the abrasive cutter. After cutting of the specimens, the experiment was held heat treatment under 900Cº for one o’clock. For 0.4%C different mechanism of cooling (i.e. air cooling, furnace cooling and water quenching) was used. After proper cooling mounting was the next step. Hot press mounting machine was used for mounting the sample in order to make suitable for handling and to make the surface flat and zero slope for the next steps. After the mounting the next step was grinding with different
Materials Engineering Department
Adama Science and Technology University
MAEng3301
October 15,2013
Abstract
Deferent carbon content steel examined to determine the microstructure, concentration and hardness of the specimens. 0.2% C, 0.4% C and 1.0% C steel specimens were prepared by cutting. Abrasive cutter was used to cut the steels. Furnace was used for heat treatment at 900°C to make the phases separate when seen by microscope. Mounting press was use to mount the specimen to make it suitable for handling at the time of grinding and polishing. Different kind of sand paper was used to grind and make smooth the spacmens and finally polishing cloth with diamond suspension was used to remove the extra scrachs . to diffrantiate the grain boundaries it was etched by nital solution. Finally the first observation was taken made by optical microscope and scanning electron microscope.
Introduction This paper contains some important experiment results concerning metals properties. The main aim of the laboratory experiment was to examine and to compare the microstructure and hardness of different carbon content metals, starting from 0.2%C, 0.4%C, 1.0C% content metals with different heat treatment and cooling mechanism. The experiment was started from the preparation of the samples. At the first step the samples was prepared by cutting in appropriate size by the abrasive cutter. After cutting of the specimens, the experiment was held heat treatment under 900Cº for one o’clock. For 0.4%C different mechanism of cooling (i.e. air cooling, furnace cooling and water quenching) was used. After proper cooling mounting was the next step. Hot press mounting machine was used for mounting the sample in order to make suitable for handling and to make the surface flat and zero slope for the next steps. After the mounting the next step was grinding with different