Continuous cooling transformation of 960 MPa grade high strength steel

doi:10.13251/j.issn.0254-6051.2021.03.033

Abstract

Abstract: Continuous cooling transformation of 960 MPa grade high strength steel was analyzed by using DIL850L thermal dilatometer combined with metallographic and scanning electron microscopes. The results show that when the cooling rate is in the range of 0.1-2 ℃/s, the room temperature microstructure is of ferrite, pearlite and bainite; the ferrite and bainite are obtained in the range of 2-10 ℃/s; and the microstructure is all bainite in the range of 20-80 ℃/s. The high temperature transformation zone and the medium temperature transformation zone in the CCT curves are not separated, and the phase transformation temperature decreases with the increase of cooling rate.

Key words: 960 MPa high strength steel, microstructure, CCT curves

CLC Number:

TG142.1

Sun Yan, Zhao Nan, Xue Feng, An Zhiguo, Guo Yintao. Continuous cooling transformation of 960 MPa grade high strength steel[J]. Heat Treatment of Metals, 2021, 46(3): 166-169.

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