Measurement and Analysis of Time-Temperature-Transformation Curves of Boron Steel 22MnB5

Abstract:

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Hot stamping of quenchable boron steels is a new and complex forming technology integrating metal hot forming and quenching process. In order to gain the Time – Temperature - Transformation (TTT) curves of 22MnB5, the phase-transformation temperatures of boron steel 22MnB5 are measured by DIL 805A/D quenching and deformation dilatometer. According to the expansion curves of phase-transformation at some constant temperatures, the start and finish temperatures of phase-transformation are calculated by using the expansion method and the tangential method. The types of metallographic phases after phase-transformation are judged by the optical microscope and micro hardness. The TTT curves of 22MnB5 are drawn in terms of the results of testing and calculating.

Info:

Periodical:

Edited by:

Honghua Tan

Pages:

484-489

DOI:

10.4028/www.scientific.net/AMM.29-32.484

Citation:

L. F. He et al., "Measurement and Analysis of Time-Temperature-Transformation Curves of Boron Steel 22MnB5", Applied Mechanics and Materials, Vols. 29-32, pp. 484-489, 2010

Online since:

August 2010

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Price:

$35.00

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