A study of microstructural evolution of AISI D2 tool steel during Direct Partial Remelting method

Research output: Contribution to journalArticle

Abstract

Tool steels are difficult to weld using conventional fusion welding process. Therefore, in this study, a thixotropic property of metal was utilized to join an AISI D2 tool steel by using uncommon direct partial re-melting (DPRM) method. The aim of this study is to analyse the effect of DPRM on microstructural evolution and hardness property of the welded joint of D2 tool steel. The microstructural analysis showed that the inherent carbides in D2 tool steel fully dissolved when the heating temperature reached between 1250°C and 1280° °C. Overall, the grain size and shape factor of DPRM samples were within the limit of semisolid processing parameter which are 100 μm and 2, respectively. Based on the microstructural evolution analysis, grain size, shape factor, and hardness value obtained, this study successfully affirmed that with suitable globular microstructure and high bonding quality a sound weld joint of D2 tool steel components can be attained at temperature range of 1280 °C, 1300 °C and 1320 °C.

Original languageEnglish
Pages (from-to)689-693
Number of pages5
JournalInternational Journal of Mechanical Engineering and Robotics Research
Volume7
Issue number6
DOIs
Publication statusPublished - 1 Nov 2018

Fingerprint

Remelting
Tool steel
Microstructural evolution
Welds
Melting
Hardness
Grain size and shape
Carbides
Welding
Fusion reactions
Acoustic waves
Heating
Temperature
Microstructure
Processing
Metals

Keywords

  • D2 tool steel
  • DPRM
  • Hardness
  • Liquid fraction
  • Microstructure

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Artificial Intelligence

Cite this

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abstract = "Tool steels are difficult to weld using conventional fusion welding process. Therefore, in this study, a thixotropic property of metal was utilized to join an AISI D2 tool steel by using uncommon direct partial re-melting (DPRM) method. The aim of this study is to analyse the effect of DPRM on microstructural evolution and hardness property of the welded joint of D2 tool steel. The microstructural analysis showed that the inherent carbides in D2 tool steel fully dissolved when the heating temperature reached between 1250°C and 1280° °C. Overall, the grain size and shape factor of DPRM samples were within the limit of semisolid processing parameter which are 100 μm and 2, respectively. Based on the microstructural evolution analysis, grain size, shape factor, and hardness value obtained, this study successfully affirmed that with suitable globular microstructure and high bonding quality a sound weld joint of D2 tool steel components can be attained at temperature range of 1280 °C, 1300 °C and 1320 °C.",
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AU - Sajuri, Zainuddin

AU - Omar, Mohd. Zaidi

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Tool steels are difficult to weld using conventional fusion welding process. Therefore, in this study, a thixotropic property of metal was utilized to join an AISI D2 tool steel by using uncommon direct partial re-melting (DPRM) method. The aim of this study is to analyse the effect of DPRM on microstructural evolution and hardness property of the welded joint of D2 tool steel. The microstructural analysis showed that the inherent carbides in D2 tool steel fully dissolved when the heating temperature reached between 1250°C and 1280° °C. Overall, the grain size and shape factor of DPRM samples were within the limit of semisolid processing parameter which are 100 μm and 2, respectively. Based on the microstructural evolution analysis, grain size, shape factor, and hardness value obtained, this study successfully affirmed that with suitable globular microstructure and high bonding quality a sound weld joint of D2 tool steel components can be attained at temperature range of 1280 °C, 1300 °C and 1320 °C.

AB - Tool steels are difficult to weld using conventional fusion welding process. Therefore, in this study, a thixotropic property of metal was utilized to join an AISI D2 tool steel by using uncommon direct partial re-melting (DPRM) method. The aim of this study is to analyse the effect of DPRM on microstructural evolution and hardness property of the welded joint of D2 tool steel. The microstructural analysis showed that the inherent carbides in D2 tool steel fully dissolved when the heating temperature reached between 1250°C and 1280° °C. Overall, the grain size and shape factor of DPRM samples were within the limit of semisolid processing parameter which are 100 μm and 2, respectively. Based on the microstructural evolution analysis, grain size, shape factor, and hardness value obtained, this study successfully affirmed that with suitable globular microstructure and high bonding quality a sound weld joint of D2 tool steel components can be attained at temperature range of 1280 °C, 1300 °C and 1320 °C.

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