Results 51 to 60 of about 86 (78)

Review of Nanobainite Steel Welding

Advanced Materials Research, 2012
Nanobainite steel is a new strong structural material with an ultimate tensile strength of 2500 MPa, and toughness in excess of 30-40 MPam1/2. However, so far, no suitable methods can realize its welding because of poor weldabilities. This paper reviews recent researches on welding of nanobainite steel and points out their merits and demerits.
Kun Fang, Jian Guo Yang, De Long Zhao, Kui Jing Song, Zhong Jie Yan, Hong Yuan Fang   +5 more
openaire   +1 more source

Effect of ausforming on nanobainite steel

Scripta Materialia, 2010
The effect of ausforming on kinetics, morphology and crystallography of nanobainite steel was examined by electron backscattered diffraction and transmission electron microscopy. Ausforming has been found to accelerate bainite transformation at 573 K. A characteristic microstructure consisting of blocky bainitic laths and retained austenite is observed
W. Gong, Y. Tomota, M.S. Koo, Y. Adachi
openaire   +1 more source

Nanoscale microstructural characterization of a nanobainitic steel

Acta Materialia, 2011
Abstract A 0.79 C–1.5 Si–1.98 Mn–0.98 Cr–0.24 Mo–1.06 Al–1.58 Co (wt.%) steel was isothermally heat treated at 200 °C for 10 days and 350 °C for 1 day to form a nanoscale bainitic microstructure consisting of nanobainitic ferrite laths with high dislocation density and retained austenite films. The microstructures of the samples were characterized by
I.B. Timokhina, H. Beladi, X.Y. Xiong, Y. Adachi, P.D. Hodgson   +4 more
openaire   +1 more source

Microstructures and properties of a novel carburizing nanobainitic bearing steel

Materials Science and Engineering: A, 2020
Abstract Nanobainite and dispersed carbides were gained on the surface layer of a modified carburizing 23Cr2Ni2Si1Mo bainitic bearing steel based on carburization, tempering at high temperature, and succedent low-temperature isothermal quenching. As compared with the conventional carburizing 20Cr2Ni4 martensitic bearing steel, the novel carburizing ...
Yanhui Wang, Zhinan Yang, Fucheng Zhang, Yuman Qin, Xubiao Wang, Bo Lv   +5 more
openaire   +1 more source

Extremely high strength achievement in medium-C nanobainite steel

Scripta Materialia, 2018
Abstract Nanobainite was produced in medium-C Si-rich steel through ausrolling at 500 °C and subsequent austempering at temperatures slightly above the martensite start temperature. The tensile properties were studied and compared to high-C nanobainite steels.
J. Zhao, K. Guo, Y.M. He, Y.F. Wang, T.S. Wang   +4 more
openaire   +1 more source

Characterization of Isothermally Heat-Treated High Carbon Nanobainitic Steels

Journal of Materials Engineering and Performance, 2013
Isothermal heat treatment close to the martensite-start temperature at various transformation times, followed by hardness and compression tests, has been performed for three new high carbon experimental nanobainitic steels. Microstructural characterization clearly revealed the formation of lower bainitic structures with plate thickness in the range of ...
G. Sidhu, S. D. Bhole, E. Essadiqi, D. L. Chen   +3 more
openaire   +1 more source

Electron beam hardening of nanobainitic steel

Surface Engineering
Nanobainitic steels with high Si content are very promising materials due to the very favourable combination of mechanical and functional properties. However, sometimes in order to achieve the required results, it is necessary to further increase the surface's layer hardness. One of the feasible methods of surface hardening is electron beam hardening.
Piotr Śliwiński, Marek St Węglowski, Andrzej N. Wieczorek, Emilia Skołek   +3 more
openaire   +1 more source

Effect of prior martensite on bainite transformation in nanobainite steel

Acta Materialia, 2015
Abstract Nanobainite transformation behavior was comparably studied using in situ neutron diffraction measurements, scanning electron microscopy and electron backscatter diffraction observations for two heat treatments: with and without partial quenching before isothermal holding at 523 or 573 K.
W. Gong, Y. Tomota, S. Harjo, Y.H. Su, K. Aizawa   +4 more
openaire   +1 more source

A Preliminary Study on Machinability Assessment of Nanobainite Steel

Volume 2B: Advanced Manufacturing, 2013
The demand for high strength materials and improvements in heat treatment techniques has given rise to this new form of high strength steel known as nanobainite steel. The production of nanobainite steel involves slow isothermal holding of austenitic steel around 200°C for 10 days, in order to obtain a carbon enriched austenite and cooling to room ...
Ashwin Polishetty, Guy Littlefair, Thomas Musselwhite, Chinmay Sonavane   +3 more
openaire   +1 more source

Acceleration of nanobainite transformation by multi-step ausforming process

Scripta Materialia, 2015
The effect of multi-step ausforming with small strain per pass (
Jianguo He, Aimin Zhao, Chao Zhi, Hongliang Fan   +3 more
openaire   +1 more source