The asquenched microstructure and tempering behavior of rapidly solidified tungsten steels |
| |
Authors: | J J Rayment B Cantor |
| |
Affiliation: | (1) Materials and Molecular Research Division, Lawrence Berkeley Laboratory, 94720 Berkeley, CA;(2) Department of Metallurgy and Science of Materials, University of Oxford, Oxford, England |
| |
Abstract: | Transmission electron microscopy, and microhardness testing were used to examine the as-quenched structure and mechanical
properties of a series of rapidly solidified (RS) iron-tungsten-carbon-alloys ranging from 6 to 23 pct tungsten with a constant
W:C atomic ratio of 2:1, and Tl high speed tool steel. The RS iron-tungsten-carbon alloys were found to exhibit a significant
change in microstructure and hardness as the tungsten and carbon content was increased. The change in morphology was from
lath martensite in the lower tungsten alloys to a solidification structure of δ-ferrite cells surrounded by austenite and
M6C carbide, in the higher tungsten alloys. A model is proposed to explain the morphologicl change. In addition, the tempering
behaviors of RS Fe-6.2 wt pct W-0.21 wt pct C, Fe-23 wt pct W-0.75 wt pct C and Tl high speed tool steel were examined and
compared to those observed for the conventional solution-treated and quenched alloys. A discussion is also included on the
microstructural dependence upon cooling rate of RS high speed tool steels.
formerly of School of Engineering and Applied Sciences, University of Sussex, Falmer, Brighton, England. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|