Microstructure and Mechanical Properties of STD11 Steel According to Reheat Treatment

Gi Yeon Park; Eui Pyo Kwon; Gi Ho Heo

doi:10.3740/MRSK.2022.32.3.139

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2022 Vol.32, Issue 3 Preview Page Next Page

Microstructure and Mechanical Properties of STD11 Steel According to Reheat Treatment STD11 금형강 재열처리에 따른 미세조직 및 기계적 특성

March 2022. pp. 139-145

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Abstract

Reheat treatment process of mold is necessary when partial machining of the mold is required, such as shape correction for an existing mold. If defects such as cracks or significant deterioration of mechanical properties of the mold occur during reheat treatment, it is impossible to reuse the mold. In this study, reheat treatment was performed up to two times for STD11 tool steel, and microstructure and mechanical properties according to the reheat treatment were evaluated. Carbide fraction and grain size of prior austenite were almost unchanged after the reheat treatment. Hardness and impact toughness increased significantly after QT treatment, and these properties were maintained without significant change even after the reheat treatment. It is concluded that up to two iterations of reheat treatment does not cause deterioration of properties of STD11 tool steel. Based on these results, a mold for a face-lifted front bumper was manufactured through machining and reheat-treating of an existing mold.

Keywords

STD11

reheat treatment

microstructure

mechanical properties

metal mold

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 32
No :3
Pages :139-145
Received Date : 2022-01-13
Revised Date : 2022-02-24
Accepted Date : 2022-02-24
DOI :https://doi.org/10.3740/MRSK.2022.32.3.139

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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