Journal ArticleDOI
Application of the divorced eutectoid transformation to the development of fine-grained, spheroidized structures in ultrahigh carbon steels
TLDR
In this paper, a two-step thermomechanical processing method for obtaining fully spheroidized structure in UHC steels is described, where the first step is a hot a warm working (HWW) procedure, followed by air cooling.About:
This article is published in Scripta Metallurgica.The article was published on 1984-08-01. It has received 114 citations till now. The article focuses on the topics: Austenite.read more
Citations
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Journal ArticleDOI
Steels for bearings
TL;DR: In this paper, the structure and properties of bearing steels prior to the point of service are first assessed and described in the context of steelmaking, manufacturing and engineering requirements, followed by a thorough critique of the damage mechanisms that operate during service and in accelerated tests.
Journal ArticleDOI
The divorced eutectoid transformation in steel
John D. Verhoeven,E.D. Gibson +1 more
TL;DR: The divorced eutectoid transformation (DET) was shown to be faster in the presence of small spheroidal cementite particles with spacings on the order of a few microns as mentioned in this paper.
Journal ArticleDOI
The Cementite Spheroidization Process in High-Carbon Steels with Different Chromium Contents
TL;DR: In this article, a bimodal distribution of spheroidized cementite particles is experimentally observed in high-carbon steel with different chromium (Cr) contents.
Journal ArticleDOI
Influence of microstructure on tensile properties of spheroidized ultrahigh-carbon (1.8 Pct C steel
TL;DR: In this article, a Hall-Petch type relationship exists between the yield strength and the ferrite grain size and carbide particle size within grain interiors, and the fracture strength was found to be uniquely dependent on the coarse carbide particles typically found at grain boundaries.
Journal ArticleDOI
The role of the divorced eutectoid transformation in the spheroidization of 52100 steel
TL;DR: In this paper, the authors evaluated the heat treatment conditions that promote the divorced eutectoid transformation (DET) reaction in 52100 steel and found that the DET is dominant over the pearlite reaction for austenitization at temperatures of 830 °C and below and for cooling rates of 500 °C/h and below.
References
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PatentDOI
Superplastic ultra high carbon steel
TL;DR: An ultra high carbon steel with a fine grained iron matrix stabilized by cementite in predominantly spheroidized form at elevated temperatures is treated by heat treatment and mechanical working under sufficient deformation to refine the iron grain and spherolyize the cementite as mentioned in this paper.
Journal ArticleDOI
Mechanical behavior of superplastic ultrahigh carbon steels at elevated temperature
Bruno Walser,Oleg D. Sherby +1 more
TL;DR: In this article, it was shown that superplastic properties of UHC steels with fine equiaxed ferrite or austenite grains (∼1 μm) stabilized by fine spheroidized cementite particles can be observed at normal forming rates.
Journal ArticleDOI
Influence of chromium on superplasticity in ultra-high carbon steels
J. Wadsworth,Oleg D. Sherby +1 more
TL;DR: The influence of chromium additions to ultra-high carbon steels has been investigated in this paper, where chromium is found to enhance greatly the superplastic properties of a common bearing steel and a plain 1.6% C steel.
Journal ArticleDOI
Mechanical prperties and microstructure of heat-treated ultrahigh carbon steels
TL;DR: In this paper, the mechanical properties of submicron grain size plain carbon steels (1.3 and 1.6% C) have been studied after heat treatment and it has been shown that such steels can be austenitized and quenched to high hardness (Rc = 67), high compression fracture strength (4345 MPa (about 630 klbf in−2)), and good compression ductility (about 10%).
Journal ArticleDOI
The development of fine structure superplasticity in cast ultrahigh carbon steels through thermal cycling
TL;DR: In this paper, superplastic structures have been developed in an as-cast ultrahigh carbon steel, containing 1.6% C, by heat treatment alone, and an optimum structure was found after about 10 cycles and strain rate sensitivities of about 0.45 and elongations to failure of over 300% have been achieved.