Jominy Hardenability test - Lab Report Example

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Jominy Hardenability test

During testing, water was sprayed on one side of the steel bar when still hot so as to enhance a one-dimensional transfer of heat during cooling. Moving away from the end that was quenched made the temperature rate of change to be altered. The rate of cooling is observed being low as the temperature increases. When the hardness of the surface is measured as a distance function from the end, a profile of hardness was obtained. This profile can be applied to any specimen that is made from steel (Callister 4). Hardenability is, therefore different from hardness as hardness refers to a measure of the extent of resistance for a solid matter towards different types of permanent shapes whenever some amount of force is applied to the solid matter. The macroscopic hardness is hardness with intermolecular bonds that are strong. It occurs whenever the character of the solid matter under force appears to be complex. In this respect, there are a variety hardness measurements. These include indentation hardness, scratch hardness, and rebound hardness (Bain 3).Comparing the experimental and published hardenability values, it is evidenced that the two pairs of curves are similar to each other. The curves have a similar gradient with just a few differences. These differences were brought about due to experimental errors. Some of the experimental errors came about due to air resistance, parallax, the heterogeneous trait of the calibration plate, faultiness of the Rockwell scale, and wrong calculation. ...Show more

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The power "Jominy Hardenability Test" describes that experiment setting was driven by the urge to investigate the Jominy hardenability test. Apart was hardened through quenching by water and oil. The hardenability of steel increased with the content of carbon, as well as the content of the alloy…
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