Ultra High Carbon Steels Obtained by Powder Metallurgy

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

Powder Technology ◽

10.1016/j.powtec.2020.01.002 ◽

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

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Ultra High Carbon Steels Obtained by Powder Metallurgy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.530-531.328 ◽

2006 ◽

Vol 530-531 ◽

pp. 328-333 ◽

Cited By ~ 1

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).

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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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BÖHLER S692/S693 MICROCLEAN

Alloy Digest ◽

10.31399/asm.ad.ts0739 ◽

2017 ◽

Vol 66 (2) ◽

Keyword(s):

Powder Metallurgy ◽

Physical Properties ◽

Small Diameter ◽

Heat Treating ◽

Powder Metal ◽

High Carbon ◽

Low Sulfur ◽

Machining Characteristics

Abstract Böhler (or Boehler) S692 Microclean is a high sulfur, high carbon PM M4, with higher manganese and 0.22 sulfur for improved machining characteristics, and is available in rounds greater than or equal to 64.16 mm (2.562 in.) diameter. S693 Microclean is the low sulfur version of high carbon PM M4, available in flats and small diameter rounds. PM refers to powder metallurgy. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on surface qualities as well as heat treating and powder metal forms. Filing Code: TS-739. Producer or source: Böhler Edelstahl GmbH & Company KG.

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LESCO T-15 PM

Alloy Digest ◽

10.31399/asm.ad.ts0498 ◽

1990 ◽

Vol 39 (8) ◽

Keyword(s):

Powder Metallurgy ◽

Physical Properties ◽

Tool Steel ◽

Abrasion Resistance ◽

High Speed ◽

Heat Treating ◽

High Carbon ◽

Steel Company ◽

Good Retention ◽

Hot Hardness

Abstract LESCOT-15 PM is a special purpose tungsten type high-speed tool steel containing cobalt for good retention of hot hardness and high carbon and vanadium for enhanced abrasion resistance. It is produced by powder metallurgy. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-498. Producer or source: Latrobe Steel Company. Originally published August 1989, revised August 1990.

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