Effect of Initial Microstructure on The Mechanical Properties of an Intercritically Quenched and Tempered HB400 Grade Heavy Plate

Zhao, Fan; Qu, Jinbo; Qiao, Ke

doi:10.1002/9781119223399.ch29

Cited by 1 publication

(1 citation statement)

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“…The tensile strength and hardness of the steel with quenching pretreatment are higher than that after normalizing. Fan et al [32] found that the hardness values of the samples with two initial microstructures, i.e. bainite and martensite, were almost the same, but the toughness of the latter was higher than that of the former after intercritical quenching and subsequent tempering.…”

Section: Introductionmentioning

confidence: 99%

Effect of intercritical heat treatment process on the microstructure and mechanical properties of low alloy structural steels with residual element tin

Sun

Wang

Shen

et al. 2022

Ironmaking & Steelmaking

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The intercritical heat treatment process is considered a novel technology to solve the mismatch of strength and toughness of low alloy steel containing residual elements. In the present study, the effects of initial microstructure and intercritical quenching temperature on microstructural morphology, mechanical properties and fracture appearance of the experimental tin-bearing steel have been investigated. The results show that, under the same intercritical quenching and tempering (IQ-T) heat treatment parameters, the initial microstructures of bainite and ferrite (B-F) and complete martensite (M) yield different ferrite morphologies, block and strip-like ferrite, respectively. It is found that after IQ-T process, the tensile strength of the steel containing 0.09% tin with B-F as initial microstructure is 1061 MPa, but the impact energy value is only 26 J; while the steel with M has achieved the combined properties of high strength and excellent toughness, and the optimal intercritical quenching temperature is 770°C.

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Section: Introductionmentioning

confidence: 99%