scholarly journals Micro-structure Refinement in Low Carbon High Manganese Steels through Ti-deoxidation: Austenite Grain Growth and Decomposition

2009 ◽  
Vol 49 (7) ◽  
pp. 1036-1045 ◽  
Author(s):  
Naoki Kikuchi ◽  
Seiji Nabeshima ◽  
Yasuo Kishimoto ◽  
Yasuhide Ishiguro ◽  
Seetharaman Sridhar
Keyword(s):  
Grain Growth ◽  
Structure Refinement ◽  
Low Carbon ◽  
Micro Structure ◽  
High Manganese ◽  
Austenite Grain ◽  
High Manganese Steels ◽  
Austenite Grain Growth ◽  
Manganese Steels

Austenite Grain Growth in High Manganese Steels

2019 ◽  
Vol 50 (12) ◽  
pp. 5760-5766 ◽  
Author(s):  
Madhumanti Bhattacharyya ◽  
Yves Brechet ◽  
Gary R. Purdy ◽  
Hatem S. Zurob
Keyword(s):  
Grain Growth ◽  
High Manganese ◽  
Austenite Grain ◽  
High Manganese Steels ◽  
Austenite Grain Growth ◽  
Manganese Steels

scholarly journals Micro-structure Refinement in Low Carbon High Manganese Steels through Ti-Deoxidation, Characterization and Effect of Secondary Deoxidation Particles

2011 ◽  
Vol 51 (12) ◽  
pp. 2019-2028 ◽  
Author(s):  
Naoki Kikuchi ◽  
Seiji Nabeshima ◽  
Takako Yamashita ◽  
Yasuo Kishimoto ◽  
Seetharaman Sridhar ◽  
...  
Keyword(s):  
Structure Refinement ◽  
Low Carbon ◽  
Micro Structure ◽  
High Manganese ◽  
High Manganese Steels ◽  
Manganese Steels

Evaluation of Austenite Grains Growth in High Nb and Low Nb HSLA Steel

2020 ◽  
Vol 1000 ◽  
pp. 404-411
Author(s):  
Eddy S. Siradj
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Oil And Gas ◽  
Hsla Steel ◽  
Large Diameter ◽  
Low Carbon ◽  
Austenite Grain Size ◽  
Austenite Grain ◽  
Reheating Process ◽  
Austenite Grain Growth

This study was presented due to the increasing demand of High Strength Low Alloy (HSLA) steel, such as demand for thinner-walled and large diameter pipes in oil and gas industries. In order to meet the imposed economic restrictions, the high standard of all kinds of steel properties is required and can be achieved by controlling the steel microstructure. The austenite grain size influences the microstructure and properties of steel significantly, in which fine austenite grain size leads to higher strength, better ductility, and higher toughness. Studying the behavior of steel grain growth during the reheating process is still being a fascinating subject. P.R. Rios and D Zollner [1] mentioned that grain growth is the most important unresolved issue that has been a topic of research for many years. In this research, the behavior of austenite grain growth at a high niobium-low carbon (High Nb-low C) and low Nb-high C HSLA steel was evaluated, and the result was compared with other investigation. The results found that the austenite grain growth at high Nb-high C steel was slower than the growth at a low Nb-low C steel. The activation energy of austenite grain growth and both constant A and exponent n ware determined close agreement was obtained between the prediction of the model and the experimental grain size value.

Effect of Nb on the Austenite Microstructural Homogeneity of Hot Rolled Rebars

2021 ◽  
Vol 1016 ◽  
pp. 1127-1133
Author(s):  
Beatriz Pereda ◽  
Felipe Bastos ◽  
Beatriz López ◽  
J.M. Rodriguez-Ibabe
Keyword(s):  
Solid Solution ◽  
Grain Growth ◽  
Carbon Steels ◽  
Low Carbon ◽  
Austenite Grain ◽  
Flat Rolling ◽  
Microalloying Elements ◽  
Grain Growth Kinetics ◽  
Austenite Grain Growth

While the role of Nb in flat rolling of low carbon steels has been investigated in many works, the information about the use of Nb in rebar rolling of higher carbon grades is more limited. Rebar rolling presents differences relative to flat rolling that can affect the role of Nb, such as the application of higher number of rolling passes, higher strain rates, lower interpass times, and, consequently, enhanced adiabatic heating. Increasing the number of passes can contribute to austenite grain refinement. However, the high finishing temperatures in rebar rolling can lead also to significant austenite grain growth and microstructural heterogeneity development before phase transformation. This phenomenon will directly influence the final grain size and can also lead to the appearance of second hard phases in the final product. One of the options to avoid austenite grain growth is to add microalloying elements that retard grain growth kinetics, either in solid solution or as precipitates. This can open new roles for the application of Nb in rebar rolling. To analyze this, in this work laboratory torsion tests were performed with two 0.2%C steels microalloyed with two different Nb contents (0.029% and 0.015%). Soaking temperatures from 1100°C to 1250°C were applied to obtain different amounts of Nb in solid solution before grain growth study. The study shows that not only finish rolling temperature and cooling time, but also reheating temperature and the amount of Nb remaining in the form of undissolved precipitates are important factors controlling austenite grain growth.

Effect of magnesium addition in low-carbon steel part 1: behaviour of austenite grain growth

2017 ◽  
Vol 46 (3) ◽  
pp. 292-300 ◽  
Author(s):  
Xiaobing Li ◽  
Tongsheng Zhang ◽  
Yi Min ◽  
Chengjun Liu ◽  
Maofa Jiang
Keyword(s):  
Carbon Steel ◽  
Grain Growth ◽  
Low Carbon Steel ◽  
Steel Part ◽  
Low Carbon ◽  
Austenite Grain ◽  
Austenite Grain Growth ◽  
Magnesium Addition
Sign in / Sign up

Export Citation Format

Share Document