Spheroidize Annealing and Mechanical Property Evaluation of AISI 1040 Steel

Harisha, S R and Sharma, S S and Kini, Achutha U (2017) Spheroidize Annealing and Mechanical Property Evaluation of AISI 1040 Steel. In: Asia Conference on Mechanical and Materials Engineering, 09/06/2017, Tokyo Japan.

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Abstract

The austenite phase present in steel above the critical temperature has the tendency to form variety of non equilibrium phases depending upon the degree of supercooling or cooling rates. The near spherical or curved shaped carbides records least resistance for machining because the blunt cornered shapes are having least free energy with minimum internal stresses. There is a need to formulate the heat treatment process to tailor the characteristics in line with the application. The age old normalizing treatment provides more nucleation sites required for so that finer spheroids are dispersed in the matrix to improve toughness with balanced bulk hardness related properties to improve machinability. In line with requirements, the heat treatment cycle to balance mechanical and microstructural properties of AISI 1040 structural steel is designed. It is observed that lower spheroidizing temperature gives finer spheroids, more in number with better improvement in toughness whereas higher Spheroidization temperature reduces hardness values with lesser spheroid density, accordingly reduces strength and impact resistance. The balanced improvement in properties may be incorporated for metal removal operations to improve productivity and tool life.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Spheroidization, Normalizing, Hardness, Impact Strength, Wear Test
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 23 Jun 2017 10:18
Last Modified: 10 Jul 2017 11:07
URI: http://eprints.manipal.edu/id/eprint/149144

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