The effect of a single quenching double tempering process on the mechanical properties of NiCrMo alloyed steel casting

This research aimed to improve the mechanical properties of NiCrMo alloyed steel casting, especially in terms of toughness. Toughness is a combination of tensile strength, yield strength, and elongation. The method used was a multi-heat treatment process involves normalizing, tempering, double tempe...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 850; no. 1; pp. 12040 - 12046
Main Authors Bandanadjaja, B, Purwadi, W, Lilansa, N, Idamayanti, D, Putra, T R S
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2020
Subjects
Alloying
Casting alloys
Elongation
Heat treating
Heat treatment
Iron and steel making
Mechanical properties
Normalizing (heat treatment)
Quenching
Tempered martensite
Tempering
Tensile strength
Toughness
Yield strength
Yield stress
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Summary:This research aimed to improve the mechanical properties of NiCrMo alloyed steel casting, especially in terms of toughness. Toughness is a combination of tensile strength, yield strength, and elongation. The method used was a multi-heat treatment process involves normalizing, tempering, double tempering, and an additional intermediate process of quenching. The results obtained through the normalizing process followed by single quenching on oil media and double tempering (single quenching double tempering) produced the best-combined result of tensile strength, yield strength, and elongation. The modulus of toughness increased by up to 745 % compared to the as-cast condition from 20 N.mm/mm3 to 149 N.mm/mm3. The best mechanical properties were obtained from tempered martensite microstructure. It is free from rest martensite and secondary carbide.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/850/1/012040