Influence of temperature processing on the microstructure and hardness of the 420 stainless steel produced by hot pressing

Ângela Cunha*, A. Marques, M. Gasik, B. Trindade

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
42 Downloads (Pure)

Abstract

In this study, samples of 420 stainless steel were obtained by hot pressing from powder at temperatures from 1,100 to 1,200°C. The aim was to explore the influence of the processing temperature on their grain size, microstructure, densification and mechanical properties. The results showed that it is possible to produce dense samples at these sintering temperatures. The sintering temperature influenced the density, grain size, structural phases, and hardness of the samples. Martensite and austenite were present in the samples sintered at 1,100, 1,150, and 1,180°C. Precipitation of Cr23C6 was observed after sintering at 1,200°C. This sample was the one with the highest density (99.7% densification) and hardness (771.9 HV).

Original languageEnglish
Pages (from-to)333-340
Number of pages8
JournalMaterials and Manufacturing Processes
Volume38
Issue number3
Early online date13 May 2022
DOIs
Publication statusPublished - 17 Feb 2023
MoE publication typeA1 Journal article-refereed

Keywords

  • 420 stainless steel
  • grain size
  • hot pressing
  • microhardness
  • microstructure

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