On the evolution of secondary hardening carbides during continuous versus isothermal heat treatment of high speed steel HS 6-5-2

FAGERSTA D-950

Alloy Digest ◽

10.31399/asm.ad.ts0307 ◽

1976 ◽

Vol 25 (9) ◽

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Chemical Analysis ◽

Physical Properties ◽

High Speed ◽

High Speed Steel ◽

Heat Treating ◽

Secondary Hardening ◽

Excellent Response ◽

Economic Considerations

Abstract FAGERSTA D-950 is a high-speed steel that combines economic considerations in a properly balanced chemical analysis. An optimum carbon-vanadium ratio provides a high attainable hardness along with good mechanical properties. Its wide hardening range and excellent response to secondary hardening is rather unique and can offer some advantages in heat treatment. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-307. Producer or source: Fagersta Steels Inc..

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Secondary Hardening of an AISI M3:2 High Speed Steel Sinter 23 Hot Isostatic Pressed

Materials Science Forum ◽

10.4028/www.scientific.net/msf.899.361 ◽

2017 ◽

Vol 899 ◽

pp. 361-365

Author(s):

Oscar Olimpio de Araújo Filho ◽

Cezar Henrique Gonzalez ◽

Severino Leopoldino Urtiga Filho ◽

C.A.N. Oliveira ◽

Noelle D’emery Gomes Silva ◽

...

Keyword(s):

Heat Treatment ◽

High Speed ◽

Hot Isostatic Pressing ◽

High Speed Steel ◽

Secondary Hardening ◽

Tempering Temperature ◽

Hardness Tests ◽

Powder Metallurgy Process ◽

Secondary Hardness ◽

Metallurgy Process

The main aim of this work was to study the behavior of the secondary hardening of AISI M3:2 high speed steel named Sinter 23® produced by powder metallurgy process of hot isostatic pressing (HIP). The M3:2 high speed steel Sinter 23® was submitted to heat treatment of hardening with austenitizing temperatures of 1140 oC, 1160 oC, 1180 oC and 1200 oC and tempering at 540 oC, 560 oC and finally 580 oC. The effectiveness and response of the heat treatment was determined using hardness tests (Vickers and Rockwell C hardness) and had its property of secondary hardness evaluated. The results showed that the secondary hardening peak of Sinter 23® high speed steel (tempering temperature at which maximum hardness is attained) is at 540 °C for the lower austenitization temperatures of 1140 °C and 1160 °C, and it is at 560 °C for the higher austenitizing/quenching temperatures of 1180 °C and 1200°C.

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UNS T12001

Alloy Digest ◽

10.31399/asm.ad.ts0495 ◽

1989 ◽

Vol 38 (1) ◽

Keyword(s):

Heat Treatment ◽

Physical Properties ◽

Tool Steel ◽

High Speed ◽

High Speed Steel ◽

Heat Treating ◽

General Purpose ◽

Steel Mills

Abstract UNS T12001 is a general-purpose, tungsten, high-speed steel containing nominally 18% tungsten, 4% chromium and 1% vanadium. It is suitable for practically all high-speed applications. This steel has been the standard of the industry for many years because of its cutting ability, ease of heat treatment and minimum tendency to decarburize. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-495. Producer or source: Tool steel mills.

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CPM REX 25

Alloy Digest ◽

10.31399/asm.ad.ts0365 ◽

1980 ◽

Vol 29 (7) ◽

Keyword(s):

Heat Treatment ◽

High Speed ◽

High Speed Steel ◽

High Hardness ◽

Heat Treating ◽

High Speeds ◽

Aisi Type ◽

Tool Performance ◽

End Mills ◽

Machining Operations

Abstract CPM REX 25 is a super high-speed steel made without cobalt. It is comparable to AISI Type T15 cobalt-containing high-speed steel in response to heat treatment, properties, and tool performance. CPM REX 25 is recommended for machining operations requiring heavy cuts, high speeds and feeds, and difficult-to-machine materials of high hardness and abrasion resistance. Typical applications are boring tools, drills, gear cutters, punches, form tools, end mills and broaches. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: TS-365. Producer or source: Crucible Materials Corporation.

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Hardening of Selective Laser Melted M2 Steel

10.31399/asm.cp.ht2021p0007 ◽

2021 ◽

Author(s):

Mei Yang ◽

Yishu Zhang ◽

Haoxing You ◽

Richard Smith ◽

Richard D. Sisson

Keyword(s):

Heat Treatment ◽

High Speed ◽

Cutting Tools ◽

High Speed Steel ◽

High Hardness ◽

Steel Part ◽

X Ray Diffraction ◽

X Ray ◽

Heat Treated ◽

Near Net Shape

Abstract Selective laser melting (SLM) is an additive manufacturing technique that can be used to make the near-net-shape metal parts. M2 is a high-speed steel widely used in cutting tools, which is due to its high hardness of this steel. Conventionally, the hardening heat treatment process, including quenching and tempering, is conducted to achieve the high hardness for M2 wrought parts. It was debated if the hardening is needed for additively manufactured M2 parts. In the present work, the M2 steel part is fabricated by SLM. It is found that the hardness of as-fabricated M2 SLM parts is much lower than the hardened M2 wrought parts. The characterization was conducted including X-ray diffraction (XRD), optical microscopy, Scanning Electron Microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) to investigate the microstructure evolution of as-fabricated, quenched, and tempered M2 SLM part. The M2 wrought part was heat-treated simultaneously with the SLM part for comparison. It was found the hardness of M2 SLM part after heat treatment is increased and comparable to the wrought part. Both quenched and tempered M2 SLM and wrought parts have the same microstructure, while the size of the carbides in the wrought part is larger than that in the SLM part.

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