Carbide formation during precipitation hardening of SS440C steel

S. H. Salleh, Mohd. Zaidi Omar, J. Syarif, Shahrum Abdullah

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

SS440C martensitic stainless steel been extensively used in automotive applications such as ball bearing, valve components, races and many other automotive components. Heat treatment processes such as precipitation hardening will greatly affect the microstructure and the mechanical properties of this material. In this present study, effect of heating time and temperature on microstructure and hardness had been investigated. Microstructures and hardness of as-quenched and the as-treated conditions were described. High carbon content (1wt%) in this steel depressed the martensite start, Ms, temperature and hence may increased the amounts of retained austenite. This, in return will lower the hardness value of the steel samples. Microscopic observation shows that the M7C3 spheroidal carbides start to precipitates along the austenite grain boundaries for all samples. Nevertheless, precipitation heat treatment at 1100°C for 60 minutes had resulted with the highest value of hardness compared to the other samples.

Original languageEnglish
Pages (from-to)83-91
Number of pages9
JournalEuropean Journal of Scientific Research
Volume34
Issue number1
Publication statusPublished - 2009

Fingerprint

carbides
Age hardening
Steel
Hardness
Hardening
steel
hardening
hardness
Carbides
microstructure
Microstructure
Heat Treatment
Austenite
Hot Temperature
Heat treatment
heat treatment
Martensitic stainless steel
Martensite
Temperature
Ball bearings

Keywords

  • Carbides
  • Hardness test
  • Precipitation hardening
  • Retained austenite
  • SS440C steel

ASJC Scopus subject areas

  • General

Cite this

Carbide formation during precipitation hardening of SS440C steel. / Salleh, S. H.; Omar, Mohd. Zaidi; Syarif, J.; Abdullah, Shahrum.

In: European Journal of Scientific Research, Vol. 34, No. 1, 2009, p. 83-91.

Research output: Contribution to journalArticle

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