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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 32 No. 3, 2012.

Original scientific paper

The influences of specimen diameter on continuous cooling transformation curves measured with dilatation method

Xudong Zhou ; Henan University of Science and Technology
Xiangru Liu

Full text: english PDF 907 Kb

page 173-180

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Abstract

The continuous cooling transformation (CCT) curves of C45 steel were measured by the dilatation method with different diameter specimens in a Gleeble 1500D. The microstructures were analyzed by an optical microscope OLYMPUS-PMG3. The experimental results show that: the effects of the specimen diameter on the CCT curves are significant. With increasing the specimen diameter, the temperature in the specimen core increases and the supercooled austenite transformation temperature measured decreases, which makes the CCT curves moving down. However, the specimen diameter has no significant influence on the microstructures of the sample. In order to obtain precise CCT curves measured in the Gleeble 1500D, the specimen diameter should be machined into the small size, such as Ф6 mm or less in diameter.

Keywords

Heat treatment; Continuous cooling transformation (CCT) curve; Dilatation method; Specimen diameter; Microstructure

Hrčak ID:

91978

URI

https://hrcak.srce.hr/91978

Publication date:

5.11.2012.

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