Modifying Cast Tungsten-Molybdenum High-Speed Steels with Niobium, Zirconium, and Titanium

Чаус, А. С.

doi:10.1007/s11041-005-0031-5

Cited by 45 publications

(12 citation statements)

References 11 publications

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“…6,13 This theoretical prediction has been experimentally proven. [1][2][3][4][5][6] With regard to fundamentals, it is known that the higher melting point and the similarity of a crystal lattice of the inoculant phase compared with the solidifying primary solid solution phase (ferrite in the case of AISI M2 HSS), the higher its potential inoculating effectiveness. With this in mind, attention has turned to another strong carbide former, tungsten, [17][18][19][20][21] which possesses very similar chemical and physical properties as above mentioned carbide formers.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and properties evaluation of M2 high speed steel after inoculating addition of powder W and WC

Чаус

2014

Materials Science and Technology

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Melt treatment methods that involve the addition of small amounts of surface-active or/and inoculating elements have permitted the development of improved high speed steels (HSSs) with greater carbide control. In this work, addition of powdered W and WC into the melt was used to improve the as cast microstructure of AISI M2 HSS and, as consequence, its properties after full heat treatment. Under the action of inoculants, there was a refinement of the primary grains of the matrix and a transition from a columnar dendritic mode of solidification (typically found in uninoculated AISI M2) to a predominantly equiaxed morphology in the inoculated steels. SEM and EDS confirmed that the inoculation favoured the formation of the M 6 C eutectic at the expense of the M 2 C and MC variants, which prevailed in the as cast microstructure of the uninoculated steel. The relationship between microstructure and the properties is discussed.

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Section: Introductionmentioning

confidence: 99%

Microstructural and properties evaluation of M2 high speed steel after inoculating addition of powder W and WC

Чаус

2014

Materials Science and Technology

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“…[ 15 ] Furthermore, Chaus et al found that ceramic particles greatly improved the nucleation rate during the solidification of molten HSS. [ 16 ] Our testing experiments are conducted to change carbide morphology and distribution within T1 HSS. It is well known that Cr 7 C 3 particles have high strength and hardness, and have strong wear resistance and corrosion resistance at room temperature and high temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Properties of T1 High‐Speed Steel Modified by In Situ Fe–Cr–Ti–C–N Nanocomposite Inoculants

Bai

Cui

Wang

et al. 2020

steel research int.

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A Fe‐based nanocrystalline inoculant is designed and prepared via in situ synthesis based on material thermodynamics, where mechanical grinding in a ball grinder and heating in a vacuum tube furnace are important steps. The microstructure and mechanical properties of T1 high‐speed steel (T1 HSS) with and without addition of the inoculant are investigated using high‐resolution transition electron microscopy (HRTEM), scanning electron microscopy (SEM), X‐ray diffraction (XRD), and Vickers hardness testing (VHT). The Cr7C3 particles in the inoculant near the grain boundary of the Fe3W3C phase serve as a base for martensite and M6C heterogeneous nucleation, thereby increasing the nucleation rate and refining the matrix structure. The T1 HSS with the added inoculant exhibits superior hardness, impact toughness, and wear resistance after tempering treatment compared with the uninoculated control, where the hardness increases from 62.3 to 65.7 HRC with inoculation. Furthermore, the wear rate decreases from 0.0704% to 0.0551%, and the impact energy of T1 HSS after inoculation increases from 36.75% to 22.0638 J cm−2 under the same experimental conditions.

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“…and incur higher production cost, restricting the application of high speed steel rolls [5][6]. Through changing concentration of boron and carbon to control the volume fraction of borides and carbides in matrix, the high boron high-speed steel was developed that can be used as excellent wear-resistant material and the cost of production is decreased at the same time [7][8][9][10]. Investigations have discovered that borides (such as FeB, Fe 2 B) can increase hardness and wear resistance of cast iron-boron alloy [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Through changing concentration of boron and carbon to control the volume fraction of borides and carbides in matrix, the high boron high-speed steel was developed that can be used as excellent wear-resistant material and the cost of production is decreased at the same time [7][8][9][10]. Investigations have discovered that borides (such as FeB, Fe 2 B) can increase hardness and wear resistance of cast iron-boron alloy [10,11]. But the corrosion resistance and high temperature oxidation resistance of high boron high-speed steel are poor, and the hardness of matrix is decreased significantly under high temperature, resulting in the matrix could not provide good support to the hard phase and wear resistance become poor, so the application of this alloy steel is restricted [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic calculation and analysis for aluminum‐alloyed high boron high speed steel

Yang

Wang

et al. 2018

Materialwissenschaft Werkst

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The equilibrium solidified phase diagrams of high boron high speed steel have been calculated and the vertical section of iron-carbon pseudo-binary phase diagrams has been drawn with different aluminum concentration. The effect of aluminum on phase diagrams and solidification microstructure has been investigated by using optical microscope, scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry. The results show that the austenite region shrinks to a small area and the d-iron changes into a-iron directly during cooling process when the aluminum content reaches 1.5 wt.%. The addition of excessive amount of aluminum favors the formation of ferrite, which leads to the hardness decreasing. Moreover, excessive amount of aluminum (Al ! 1.5 wt.%) will make network M 2 B borocarbides tend to break. Alloying with aluminum raises the solubility of carbon in the matrix and reduces the quenched hardness. The calculation results are agreed with the ones from experimental. The calculation of phase diagrams method has been successfully used for the computation of phase equilibrium in the multi-component high boron high-speed steel system. The work provides a practical method for engineers and researchers in related areas.Keywords: High boron high speed steel / phase diagram calculation / aluminum / solidification / Thermo-Calc Schlü sselwö rter: Hochborhaltige Schnellarbeitsstä hle / PhasendiagrammBerechnungen / Aluminium / Erstarrung / Thermo-Calc

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Modifying Cast Tungsten-Molybdenum High-Speed Steels with Niobium, Zirconium, and Titanium

Cited by 45 publications

References 11 publications

Microstructural and properties evaluation of M2 high speed steel after inoculating addition of powder W and WC

Microstructural and properties evaluation of M2 high speed steel after inoculating addition of powder W and WC

Microstructures and Properties of T1 High‐Speed Steel Modified by In Situ Fe–Cr–Ti–C–N Nanocomposite Inoculants

Thermodynamic calculation and analysis for aluminum‐alloyed high boron high speed steel

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