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Jominy Hardenability test - Lab Report Example

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High school
Author : egerlach
Lab Report
Engineering and Construction
Pages 7 (1757 words)


Name Institution Date Jominy Hardenability Test. Abstract. Hardenability is a property that involves determining the distribution, as well as hardness depth often introduced through the process referred to as quenching with the use of a condition called austenization…

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Jominy Hardenability test

Following this, the part surfaces were cooled at a somewhat faster rate leading to high hardness. Through this, the inside of the part cooled at a somewhat slow rate and, therefore, did not get hardened up. Moreover, due to the T-T-T diagram, variation in hardness was not linear considering the outward part to the central part (Bain 6). It was evidenced that the hardenability of steel was dependent on the steel composition, the grain size austenitic, and the steel structure before quenching. The hardenability of steel increased with the content of carbon, as well as the content of alloy. This indicates that the Maximum hardness was influenced by the metal mass being quenched. Considering a small portion, heat was extracted rapidly, thereby, surpassing the specific steel critical rate of cooling. This implied that the part was fully martensitic. Critical rate of cooling is the cooling rate that must be exceeded to inhibit the formation of nonmartensite products. Whenever the section size increased, it was hard to have the heat extracted fast to surpass the critical rate of cooling and avoid the establishment of the non-martensitic components. The steel hardenability was found to correlate directly with the critical rates of cooling. ...
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