Open AccessThe study on the characterization of sintered hot forging and austenite stainless steels
Author(s) -
Sittipong Eiumtadanai,
Sithipong Mahathanabodee,
Ruangdaj Tongsri,
Bhanu Vetayanugul,
Sumate,
Poomiapiradee
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1137/1/012031
Subject(s) - materials science , forging , sintering , porosity , compaction , metallurgy , austenite , volume fraction , powder metallurgy , composite material , microstructure
The powder metallurgical (PM) process, consisting of compaction and sintering, is commonly used to produce sintered structural parts applied in various industrial fields. Sintered parts always have porosity due to limited materials transport by solid-state diffusion from powder particles to voids between them. Sintered specimens with low porosity show superior mechanical properties. Hot forging is one of processes for enhancing density of sintered parts. This process was applied to sintered austenitic stainless steels ( 303L, 304L, 310L and 316L). The hot-forged specimens showed increased density. This led to remarkable increase of hardness (up to 5 times). Due to the hot working nature of the process, microscopic changes in the hot-forged specimens during the process were examined. It was found that grain size and volume fraction of twins were significantly deceased.