Austenite Grain Stability of Titanium-Modified Carburizing Steel

Takashi Tanaka; Takeshi Fujimatsu; Kazuya Hashimoto; Kazuhiko Hiraoka

doi:10.4028/www.scientific.net/SSP.118.3

Paper Titles

Austenite Grain Stability of Titanium-Modified Carburizing Steel
p.3

Effect of Deep Cryogenic Treatment on Carbide Precipitation and Mechanical Properties of Tool Steel
p.9

Study on the Microstructure and Mechanical Properties of 17-4 PH Stainless Steel Depending on Heat Treatment and Aging Time
p.15

Evaluation of the Life Limit of Standard Hardness Block HRC64 at Ambient Temperature
p.21

Dissolution of Cementite Plates by Drawing, Re-Precipitation with Annealing and Corresponding Changes in Tensile Behavior in a Pearlite Steel
p.27

Effect of Annealing Temperature on Mechanical Properties of Cold Drawn Pearlitic Steel Wires
p.31

Heat Treatment Behavior of Tungsten Heavy Alloy
p.35

Aging Precipitation Behavior of Cu-Ag-Cr Alloy
p.41

Influence of Thermo-Mechanical Heat Treatment on the Thermoelectric Properties of Ag Added Bi₁Sb₃Te₆ Compounds
p.47

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Austenite Grain Stability of Titanium-Modified Carburizing Steel

Abstract:

It is important to suppress grain coarsening during the carburizing treatment of automobile components such as gears and shafts so that high strength is maintained and heat treatment distortion is minimized. Two manufacturing methods are often used for the cost reduction. One is the increasing carburizing temperature. The other is the adoption of cold forging instead of hot forging. These methods are likely to result in grain coarsening in the case of conventional steels. It is well known that the key factors to control the grain growth are the initial austenite grain size and the volume and mean size of precipitates. In this study, the grain growth property of Ti-modified steel was investigated to confirm the influence of precipitates, and compared with those of Nb-modified and conventional steels. The influence of forging temperature on the grain growth property in a Ti-modified steel was also investigated.