Effect of Austenite Grain Size on Hardenability and Impact Toughness of SCM435H

Ji Lin Chen; Shi Peng Ruan; Li Jun Wang; Jin Po Zhai; Chao Liu

doi:10.4028/www.scientific.net/MSF.867.50

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HomeMaterials Science ForumMaterials Science Forum Vol. 867Effect of Austenite Grain Size on Hardenability...

Effect of Austenite Grain Size on Hardenability and Impact Toughness of SCM435H

Abstract:

The effects of austenite grain size on hardenability and impact toughness were investigated. The results show that: Since the beginning of the two-phase region with quenching temperature, the austenite grain size from the initial 4+6 mixed crystal at 740°C, and gradually increased to 10 at 860°C; Austenite grain size and hardenability was directly proportional to the austenite grain size increased from 8μm to 36μm, the biggest change is the hardness 10HRC; Austenite grain size and impact toughness is linear, with the decrease of grain size, the impact energy increases linearly, and the austenite grain size and impact toughness curve fitting. Comprehensive analysis for ensuring the hardenability of cold heading steels should be considered optimal matching of material strength and plasticity.

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Periodical:

Materials Science Forum (Volume 867)

Pages:

50-54

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.867.50

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Online since:

August 2016

Authors:

Ji Lin Chen*, Shi Peng Ruan, Li Jun Wang, Jin Po Zhai, Chao Liu

Keywords:

Austenite Grain Size, Hardenability, Impact Toughness, Quenching, SCM435H

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