A novel approach on production of carbon steels using graphene via powder metallurgy

2022 ◽  
pp. 1-9
Author(s):  
Yasin Akgul ◽  
Ahmet Nusrev Tanrıverdi ◽  
Mehmet Akif Erden
Keyword(s):  
Powder Metallurgy ◽  
Carbon Steels ◽  
Novel Approach

Sintered High Carbon Steels: Effect of Thermomechanical Treatments on their Mechanical and Wear Performance

2008 ◽  
Vol 591-593 ◽  
pp. 271-276 ◽  
Author(s):  
M.A. Martinez ◽  
R. Calabrés ◽  
J. Abenojar ◽  
Francisco Velasco
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Powder Metallurgy ◽  
Thermomechanical Treatment ◽  
Bending Strength ◽  
Carbon Steels ◽  
Tool Steels ◽  
High Carbon ◽  
Wear Performance ◽  
Metallographic Study

In this work, ultrahigh carbon steels (UHCS) obtained by powder metallurgy with CIP and argon sintered at 1150°C. Then, they were rolled at 850 °C with a reduction of 40 %. Finally, steels were quenched at 850 and 1000 °C in oil. In each step, hardness, bending strength and wear performance were evaluated. Obtained results are justified with a metallographic study by SEM. Both mechanical properties and wear resistance are highly favoured with the thermomechanical treatment that removes the porosity of the material. Moreover, final quenching highly hardens the material. The obtained material could be used as matrix for tool steels.

A novel approach using powder metallurgy for strengthened RABiTS composite substrates for coated superconductors

2008 ◽  
Vol 21 (2) ◽  
pp. 025006 ◽  
Author(s):  
HongLi Suo ◽  
Yue Zhao ◽  
Min Liu ◽  
Shuai Ye ◽  
YongHua Zhu ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Novel Approach ◽  
Composite Substrates

THE FORMATION OF ULTRAFINE FERRITE THROUGH STATIC TRANSFORMATION IN LOW CARBON STEELS

2008 ◽  
Vol 22 (18n19) ◽  
pp. 2804-2813
Author(s):  
Y. ADACHI ◽  
M. WAKITA ◽  
H. BELADI ◽  
P. D. HODGSON
Keyword(s):  
Deformation Temperature ◽  
Carbon Steels ◽  
Grain Structure ◽  
Dynamic Strain ◽  
Ultrafine Grain ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Novel Approach ◽  
Wide Range ◽  
Ultrafine Grain Structure

A novel approach was used to produce an ultrafine grain structure in low carbon steels with a wide range of hardenability. This included warm deformation of supercooled austenite followed by reheating in the austenite region and cooling (RHA). The ultrafine ferrite structure was independent of steel composition. However, the mechanism of ferrite refinement changed with the steel quench hardenability. In a relatively low hardenable steel, the ultrafine structure was produced through dynamic strain induced transformation, whereas the ferrite refinement was formed by static transformation in steels with high quench hardenability. The use of a model Ni -30 Fe austenitic alloy revealed that the deformation temperature has a strong effect on the nature of the intragranular defects. There was a transition temperature below which the cell dislocation structure changed to laminar microbands. It appears that the extreme refinement of ferrite is due to the formation of extensive high angle intragranular defects at these low deformation temperature that then act as sites for static transformation.

Strong grain-size effect on martensitic transformation in high-carbon steels made by powder metallurgy

2020 ◽  
Vol 363 ◽  
pp. 652-656
Author(s):  
Tao Jiang ◽  
Junjie Sun ◽  
Yingjun Wang ◽  
Hongji Liu ◽  
Shengwu Guo ◽  
...  
Keyword(s):  
Grain Size ◽  
Powder Metallurgy ◽  
Martensitic Transformation ◽  
Size Effect ◽  
Carbon Steels ◽  
Grain Size Effect ◽  
High Carbon

Ultra High Carbon Steels Obtained by Powder Metallurgy

2006 ◽  
pp. 328-333
Author(s):  
M.A. Martínez ◽  
J. Abenojar ◽  
J.M. Mota ◽  
R. Calabrés
Keyword(s):  
Powder Metallurgy ◽  
Carbon Steels ◽  
High Carbon

Ultra High Carbon Steels Obtained by Powder Metallurgy

2006 ◽  
Vol 530-531 ◽  
pp. 328-333 ◽  
Author(s):  
M.A. Martinez ◽  
J. Abenojar ◽  
J.M. Mota ◽  
R. Calabrés
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Reference Material ◽  
Carbon Content ◽  
Carbon Steels ◽  
High Carbon ◽  
High Carbon Content ◽  
Damascus Steel ◽  
Sintered Steels ◽  
Ancient Iron

The objective of the present work is to study the manufacturing process of steels with high carbon content (1.5–2.1wt%) obtained by powder metallurgy. The reference material was the Damascus steel, which was employed to manufacture swords named after it and has been widely known due to its very good mechanical properties. The main reasons of the success of this product are: the high carbon content of the initial steel and the thermomechanical treatment (forge and quenching) that ancient iron forgers kept secretly during centuries. Different carbon contents (2 to3 wt%) were added to the same Fe powder matrix (ASC 300), and compacted and sintered steels are heat laminated (750°C) with a reduction of 20%. For 2% carbon content, the result is a steel with yield strength of 450 MPa, Young’s Modulus of 14.3 GPa and hardness of 109 HV(30).

Forming Limit Analysis of Molybdenum Reinforced Carbon Steels

2018 ◽  
Vol 777 ◽  
pp. 306-310 ◽  
Author(s):  
Ananthanarayanan Rajeshkannan ◽  
Sumesh Narayan
Keyword(s):  
Plastic Deformation ◽  
Free Surface ◽  
Powder Metallurgy ◽  
Ductile Fracture ◽  
Limit Analysis ◽  
Metal Forming ◽  
Carbon Steels ◽  
Die Design ◽  
Cold Forging ◽  
Forming Limit

The occurrence of ductile fracture during the plastic deformation of powder metallurgy materials is adverse and damaging and the prediction of fracture is very important in the early stages as early modifications will prevent failure. This will tend to save a lot of money and forming limit studies in many metal forming processes is up most important. Forming limit analysis on the cold forged molybdenum reinforced carbon steels were carried out in this work. In this study two key strain hardening parameters are used to study the formability characteristics. This analysis is effectively used for design of powder metallurgy parts and most importantly the die design as repressing needs to be employed before pores appear as cracks on the free surface. The cold forging was carried out on Fe-0.8%C, Fe-0.8%C-1%Mo, Fe-0.8%C-1.5%Mo and Fe-0.8%C-2.0%Mo and the formability behavior of the same is presented.

Lattice Imaging of Twin, Lath and α/Martensite Boundaries in Duplex Low Carbon Steels

1977 ◽  
Vol 35 ◽  
pp. 118-119
Author(s):  
J. Y. Koo ◽  
G. Thomas
Keyword(s):  
High Resolution Electron Microscopy ◽  
Ferrite Matrix ◽  
Carbon Steels ◽  
Bright Field Image ◽  
Low Carbon ◽  
Lattice Imaging ◽  
Bright Field ◽  
Lattice Image ◽  
New Information ◽  
Resolution Electron

High resolution electron microscopy has been shown to give new information on defects(1) and phase transformations in solids (2,3). In a continuing program of lattice fringe imaging of alloys, we have applied this technique to the martensitic transformation in steels in order to characterize the atomic environments near twin, lath and αmartensite boundaries. This paper describes current progress in this program.Figures A and B show lattice image and conventional bright field image of the same area of a duplex Fe/2Si/0.1C steel described elsewhere(4). The microstructure consists of internally twinned martensite (M) embedded in a ferrite matrix (F). Use of the 2-beam tilted illumination technique incorporating a twin reflection produced {110} fringes across the microtwins.

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