Frontiers of Mechanical Engineering >
Hot deformation behavior of a novel bimetal consisting of BTW1 and Q345R characterized by processing maps
Received date: 10 Mar 2019
Accepted date: 23 Jun 2019
Published date: 15 Dec 2019
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Only a few studies have been conducted on the flow behavior of the novel BTW1/Q345R bimetal, which is widely used in coal equipment. In this work, compression tests were conducted on BTW1/Q345R bimetal at a temperature range of 950 °C–1200 °C and strain rates of 0.05, 0.5, 5, and 15 s−1 by using a Gleeble-3800 thermomechanical simulator. A constitutive equation was validated by referring to the Arrhenius equation during the characterization of hot workability. The computed apparent activation energy of the BTW1/Q345R bimetal was 360 kJ/mol, and processing maps under different strain conditions were drawn. Analysis of the stress-strain relationship revealed that work hardening exerted a dominant effect on the thermal deformation of the BTW1/Q345R bimetal. The processing maps predicted that the optimal processing interval will increase with strain. Results showed that thermal deformation of the BTW1/Q345R bimetal should proceed when the temperature range varies from 1182 °C to 1200 °C and the strain rate interval is from 4.2 to 15 s−1.
Key words: BTW1/Q345R bimetal; constitutive equation; processing map; work hardening
Pengtao LIU , Lifeng MA , Weitao JIA , Tao WANG , Guanghui ZHAO . Hot deformation behavior of a novel bimetal consisting of BTW1 and Q345R characterized by processing maps[J]. Frontiers of Mechanical Engineering, 2019 , 14(4) : 489 -495 . DOI: 10.1007/s11465-019-0554-x
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