中碳钢温变形微观组织演变

doi:10.13228/j.boyuan.issn0449-749x.20160124

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Abstract The warm compression test for medium carbon steel was carried out on Gleeble-3500 thermal-simulation machine. The effects of deformation temperature (550， 600， 650， 700 ℃) and strain rate (0.001， 0.01， 0.1， 1， 10 s－1) on the microstructure evolution were studied. The processing map was established to explore the best parameter combination to generate the evenly distributed and fine cementite particles on the ferrite matrix. The results show that during the warm deformation， dynamic spheroidization of lamellar cementite and ferrite dynamic recrystallization occurred， and the flow stress was influenced by the evolution of microstructure. According to the processing map， the best processing parameter that the temperature range of 630-700 ℃ and the strain of 0.30-10 and 0.001-0.007 s－1 could be obtained. The composite microstructure with ultrafine ferrite grains and uniform distribution of cementite particle was obtained.

Received: 05 April 2016 Published: 29 August 2016

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LI Hong-Bin. Investigation on microstructure evolution of medium carbon steel during warm deformation[J]. Iron and Steel, 2016, 51(9): 63-69.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20160124 OR http://www.chinamet.cn/Jweb_gt/EN/Y2016/V51/I9/63

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