Semisolid structure for M2 high speed steel prepared by cooling slope

Amin-Ahmadi, Behnam; Aashuri, Hossein

doi:10.1016/j.jmatprotec.2010.05.011

Cited by 23 publications

(17 citation statements)

References 15 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These steels were used in as-received condition without any modifications. For steel grades, initial process to produce spherical particles is less needed compared to nonferrous alloys [6]. The present work aims to provide globular joining structure in semisolid state by employing AISI D2 and M2 tool steels via applying an approximately 1 MPa constant compressive stress at nil strength temperature [7,8] of D2 and direct partial remelting in furnace with argon controlled atmosphere.…”

Section: Methodsmentioning

confidence: 99%

Fracture Surface Analysis in Thixojoined Tool Steels

Kalaki

Ketabchi

Zangeneh

2014

ISRN Materials Science

View full text Add to dashboard Cite

Thixojoining has been developed for D2 and M2 tool steels. The suitable globular microstructure and excellent bonding quality are obtained through this work. Scanning electron microscopy (SEM) observation along the joint interfaces showed a smooth transition zone with no cracks. In addition, fracture surface of the shear test samples showed that the fracture mode was transgranular. Finally, based on obtained results, this method presented high quality joint with nonequilibrium diffusion interface.

show abstract

Section: Methodsmentioning

confidence: 99%

Fracture Surface Analysis in Thixojoined Tool Steels

Kalaki

Ketabchi

Zangeneh

2014

ISRN Materials Science

View full text Add to dashboard Cite

show abstract

“…The application of Semi Solid Metal (SSM) processing for steels is still at the development stage due to a high melting temperatures and the narrow liquidus-solidus range for a low carbon steels, which are of interest for a common use. SSM processing has been investigated for several steels compositions, starting with experimentally easier high carbon, mostly X210CrW12 tool steels with a broad semisolid range [1][2][3], through intermediate like M2 steels [3,4,5], up to a low carbon containing steels [6,7]. In order to obtain an easy flow of the semi-solid slurry, a microstructure of the alloy prior to forming should consist preferably of solid solution metal spheroids in a liquid matrix [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…SSM processing has been investigated for several steels compositions, starting with experimentally easier high carbon, mostly X210CrW12 tool steels with a broad semisolid range [1][2][3], through intermediate like M2 steels [3,4,5], up to a low carbon containing steels [6,7]. In order to obtain an easy flow of the semi-solid slurry, a microstructure of the alloy prior to forming should consist preferably of solid solution metal spheroids in a liquid matrix [2][3][4][5][6][7]. Such a microstructure can be obtained when the steel is initially cold or hot deformed prior to heating to a semisolid range [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…In order to obtain an easy flow of the semi-solid slurry, a microstructure of the alloy prior to forming should consist preferably of solid solution metal spheroids in a liquid matrix [2][3][4][5][6][7]. Such a microstructure can be obtained when the steel is initially cold or hot deformed prior to heating to a semisolid range [1][2][3][4][5][6][7]. Another important technological factor is fast die filling to prevent solidification in the die gate area.…”

Section: Introductionmentioning

confidence: 99%

“…A reported piston rate of 0.5-1 m/s [4][5][6][7] was therefore applied. There are limited data concerning the microstructure of thixoformed steels [2][3][4][5][6][7]. In the X210CrW12 steel it was reported [2] that after DOI thixoforming the structure of such steel mostly consists of austenite.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Rapid Cooling From the Semisolid or Liquid Range on Structure and Properties of M2 Tool Steel

Maziarz¹,

Rogal²

2017

Acta Metall Slovaca

View full text Add to dashboard Cite

M2 tool steel was used as a feedstock material for casting from the the semisolid range between 1310-1350 o C corresponding to 25 -50 % of the liquid phase. The chemical composition of the investigated steel is following: 0.85%C, 3.9 %Cr, 6.7 %W, 4.7 %Mo and 1.7 % V. A specially constructed machine allowed thixoforming in a protective argon atmosphere and semisolid forming at a high piston velocity powered by a high air pressure. After heating of the feedstock using induction heating by the stamping of semi-liquid sample to a graphite mould pre-heated by resistance heating. The material after thixoforming from 1315 o C shows a globular microstructure with a relatively small globule's size between 30-50 µm. The crystal structure of globules contained, austenite and martensite, while that of the eutectic, ferrite and W 2 C, Fe 3 C, Mo 2 C, M 23 C 6 and VC carbides as determined by X-ray studies and confirmed using electron diffraction studies. The alloying elements like Mo, W and V are concentrated in the eutectic, while Cr only in thixoformed samples segregates to the carbides and indeed M 23 C 6 was identified. The hardness significantly increases up to 780 HV after thixo-forming due to formation of martensite. The other part was cast from the liquid phase at 1450 o C using melt spinning method allowing high cooling rate. The microstructure of melt spun ribbon shows a cellular microstructure of austenitic and martensitic structure without the eutectic. The WC and M 23 C 6 carbides were located at the cell's boundariers. The microhardness near 1300 HV of the ribbon was much higher than that of semisolid formed samples

show abstract

Enhanced Grain Refinement of W18Cr4V High‐Speed Steel Using in Situ TiN−Nb−Cr@Graphene/Fe Nanocomposite Inoculant

Bai

Cui

Zhang

et al. 2021

steel research int.

View full text Add to dashboard Cite

Traditional cast W18Cr4V high-speed steel (HSS) undergoes elemental segregation during solidification, which deteriorates its macroscopic mechanical properties. Previous reports have demonstrated that grain refinement overcomes this issue. Therefore, herein, the effect of an Fe-based nanocomposite inoculant on carbide dispersion is investigated. The inoculant comprises graphene-coated ceramic particles prepared in situ via mechanical grinding in a ball grinder, where material thermodynamics are considered. The microstructure of the inoculated W18Cr4V HSS is analyzed using transition electron microscopy, scanning electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction. The orientation relationship among the phases is ð200Þ NbC = = ð11 1Þ Fe 3 W 3 C = = ð002Þ Fe 3 C . The nanocomposite ceramic particles serve as a base for the heterogeneous nucleation of Fe 3 W 3 C and Fe 3 C, thereby increasing the nonuniform nucleation rate for enhanced grain refinement. This behavior plays a crucial role in the intragranular reinforcement of HSS.

show abstract

Semisolid structure for M2 high speed steel prepared by cooling slope

Cited by 23 publications

References 15 publications

Fracture Surface Analysis in Thixojoined Tool Steels

Fracture Surface Analysis in Thixojoined Tool Steels

Effect of Rapid Cooling From the Semisolid or Liquid Range on Structure and Properties of M2 Tool Steel

Enhanced Grain Refinement of W18Cr4V High‐Speed Steel Using in Situ TiN−Nb−Cr@Graphene/Fe Nanocomposite Inoculant

Contact Info

Product

Resources

About