Apparent Morphologies and Nature of Packet Martensite in High Carbon Steels

The space morphology of martensite in 15, 45 and T9 steels quenched from high temperatures had been observed under a scanning electron microscope using a thin-foil specimen which were deeply etched. The results show that the space appearance of packet martensite is not lath-like in shape, but sheet-like in low carbon steel, and thin plate-like in medium and high carbon steels. The stereoscopic models of two kinds of packet martensite, named sheet-like and thin plate-like martensite by authors, were proposed.

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Precipitation at the transformation interface of pearlite in steel

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100177696 ◽

1990 ◽

Vol 48 (4) ◽

pp. 912-913

Author(s):

F. A. Khalid ◽

D. V. Edmonds

Keyword(s):

Thin Foil ◽

Carbon Steels ◽

Model Alloy ◽

Low Carbon ◽

High Carbon ◽

Growth Interface ◽

Medium Carbon ◽

Interphase Precipitation ◽

Solution Treated ◽

Wide Range

The austenite/pearlite growth interface in a model alloy steel (Fe-1lMn-0.8C-0.5V nominal wt%) is being studied in an attempt to characterise the morphology and mechanism of VC precipitation at the growth interface. In this alloy pearlite nodules can be grown isothermally in austenite that remains stable at room temperature thus facilitating examination of the transformation interfaces. This study presents preliminary results of thin foil TEM of the precipitation of VC at the austenite/ferrite interface, which reaction, termed interphase precipitation, occurs in a number of low- carbon HSLA and microalloyed medium- and high- carbon steels. Some observations of interphase precipitation in microalloyed low- and medium- carbon commercial steels are also reported for comparison as this reaction can be responsible for a significant increase in strength in a wide range of commercial steels.The experimental alloy was made as 50 g argon arc melts using high purity materials and homogenised. Samples were solution treated at 1300 °C for 1 hr and WQ. Specimens were then solutionised at 1300 °C for 15 min. and isothermally transformed at 620 °C for 10-18hrs. and WQ. Specimens of microalloyed commercial steels were studied in either as-rolled or as- forged conditions. Detailed procedures of thin foil preparation for TEM are given elsewhere.

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Effect of wire electrode discharge machining process parameters on the surface roughness, hardness, and microstructure of the high carbon steels

Materials Today Proceedings ◽

10.1016/j.matpr.2021.02.269 ◽

2021 ◽

Author(s):

Muralidhara Rao ◽

Vijeesh Vijayan ◽

Athul Anil ◽

Prithvi Kumar Rai ◽

Nirmith R. Jain

Keyword(s):

Surface Roughness ◽

Process Parameters ◽

Carbon Steels ◽

Machining Process ◽

Wire Electrode ◽

High Carbon ◽

Electrode Discharge

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The Influence of Carbonitriding and Heat Treatment on the Properties of Low- and High-Carbon Steels

Materials Science Forum ◽

10.4028/www.scientific.net/msf.163-165.239 ◽

1994 ◽

Vol 163-165 ◽

pp. 239-246 ◽

Cited By ~ 5

Author(s):

M. Przylecka ◽

W. Gestwa ◽

M. Kulka

Keyword(s):

Heat Treatment ◽

Carbon Steels ◽

High Carbon

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.591-593.271 ◽

2008 ◽

Vol 591-593 ◽

pp. 271-276 ◽

Cited By ~ 1

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.

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