Affiliation:
1. Tatung University
2. Chinese Culture University
Abstract
The effects of vacuum carburizing under an acetylene atmosphere at 950 and 1000,
followed by gas quenching and tempering at various temperatures on the properties of AISI S7
shock-resistant tool steel were studied. As carburized specimens undergo low temperature
tempering, the surface hardness of the quenched specimens carburized at 1000 is lower than those
of the specimens carburized at 950, due to the large amount of retained austenite in specimens
carburized at 1000. Under high temperature tempering, specimens carburized at 1000 have
higher surface hardness than specimens carburized at 950. As specimens are tempered in the
range between 450 to 550, the surface hardness of carburized specimens show a modest
increase due to the secondary hardening effects. According to the fracture toughness data, the
toughness of carburized specimens peaked at tempering at 600.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
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