Effect of electromagnetic centrifugal casting on solidification microstructure of cast high speed steel roll

Zhang, T.; Wang, Q.; Xianming, Song; Fu, Hanguang

doi:10.1002/mawe.201100633

Cited by 11 publications

(5 citation statements)

References 4 publications

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“…Except having excellent fracture resistance, its surface must have excellent wear and heat resistance, because the quality of rolls not only affects the product cost, but also immediately determines product quality and working rate of rolling mill. For these reasons, the study on improving the wear resistance of hot rolling rolls causes home and overseas attention, the materials of hot rolling rolls have been improved and developed ceaselessly, from common chilled iron [1], indefinite chilled alloy iron [2], high chromium cast iron and high chromium cast steel [3] to high speed steel (HSS) [4] and powder metallurgy (PM) hard metal [5] that are now widely used in overseas market.…”

Section: Introductionmentioning

confidence: 99%

A study of heat treatment of high‐boron high‐speed steel roll

Cen¹,

2013

Materialwissenschaft Werkst

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High-boron high-speed steel (HSS) is a cheap roll material. In the paper, the authors research the effect of heat treatment on the microstructure and properties of high-boron high-speed steel HSS roll containing 0.54% C, 1.96% B, 3.82% W, 7.06% Mo, 5.23% Cr and 2.62% Al by means of the optical microscopy (OM), the scanning electron microscopy (SEM), X-ray diffraction (XRD) and hardness test. The results showed that as-cast structure of boron-bearing high-speed steel HSS consisted of martensite, pearlite, M 2 (B, C), M 3 (B, C) and M 23 (B, C) 6 type borocarbides. After quenching, the matrix transformed into the lath martensite, and M 3 (B, C) dissolved into the matrix. When quenching temperature is lower than 1050 8C, the hardness is increased with the increase of quenching temperature under oil cooling, while quenching temperature excels 1100 8C, the hardness will decrease with the increase of quenching temperature. Under the condition of salt bath and air cooling, the effect of quenching temperature on the hardness is similar to the above law, but the quenching temperature obtaining the highest hardness is higher than that of oil cooling. The highest hardness is obtained while tempering at 525 8C. The hardness of high-boron high-speed steel HSS roll is 66.5 HRC, and its impact toughness excels 13.1 J/ cm 2 . Using in pre-finishing stands of high-speed hot wire-rod rolling mill, the wear rate of highboron HSS rolls is 0.26 mm/one thousand tons steel. However the manufacturing cost of highboron HSS rolls is obviously lower than that of powder metallurgy hard alloy rolls, it is only 28% of that of powder metallurgy (PM) hard alloy rolls.Keywords: High speed steel roll / boron alloying / heat treatment / rolling steel / wear resistance /

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Section: Introductionmentioning

confidence: 99%

A study of heat treatment of high‐boron high‐speed steel roll

Cen¹,

2013

Materialwissenschaft Werkst

Self Cite

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“…The Vickershardness of eutectic boride is in the range of 1430 -1480 [13]. The design idea of high boron iron-basedalloyistouse boride to replace carbide in white castiron, and to use medium or low carbon matrix to replace high carbon matrix.…”

Section: Introductionmentioning

confidence: 99%

“…However, the toughness of the material in some conditions still cannot meet the requirements. Alloying is another way to improve toughness of Fe-B-C ternary alloysteel [13]. It should be noted that most of the works on improving toughness of high boron iron-based alloy mainly focus on thistwo ways.…”

Section: Introductionmentioning

confidence: 99%

Effect of isothermal quenching methods on impact toughness and wear resistance in high boron steel

Liu

et al. 2015

International Journal of Materials Research

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Effect of isothermal quenching methods on impact toughness and wear resistance in high borons teelIsothermal quenching methodswere applied to highboron steel for improving the impact toughness and wear resistance. The effect of different heat treatment processes on the microstructure and mechanical properties was studied. Each of the specimens was characterized using metallographictechniques, scanning electronic microscope, energy dispersives pectroscopy, X-ray diffraction, toughness and hardness testing. The results indicate that the as-cast high boron steel consistso fp earlite matrix and eutectic boride M 2 Ba nd Fe 3 (C, B) type distributing along grain boundaries. After isothermal quenching, the matrix of highboron steel is changed from pearlite to martensite and lower bainite. The impact toughness and wear resistance of high boron steel after isothermal quenching are better than that of high boronsteel after water quenching.

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“…Third, the service life of the roll is usually short because it is difficult to obtain both high surface hardness and core part toughness [1,2]. In light of this condition, centrifugal casting [3,4], a continuous pouring process for cladding (CPC) [5], and electroslag surfacing with the liquid metal method (ESSLM) [6] have been developed for the production of bimetallic compound rolls. Compared to single material rolls, the compound roll consists of internal material with toughness and external material with stronger hardness.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Compound Rolls Produced by Electroslag Remelting Cladding Method

Hou

Dong

Deng

et al. 2018

Metals

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Electroslag remelting cladding (ESRC) with a t-shape current carrying mold was adopted to make a compound roll including a working layer and mandrel. A comprehensive coupled transient model was established to reveal the basic phenomena of electromagnetic fields, flow fields, temperature fields, and multiphase flow. Meanwhile, the movement of the mandrel and working layer relative to the slag pool was simulated by dynamic mesh technology to reveal the interface bonding mechanism. The mechanism is as follows: The temperature of the mandrel increases and the mandrel melts slightly when the mandrel passes through the slag pool. The fusion layer is a mixture of molten steel of mandrel and working layer that is the connector between the mandrel and the working layer. Therefore, the interface bonding quality is dependent on a fusion layer that is affected by the voltage/power. The investigation indicates that the fusion layer thickness is between 2 and 4 mm in the condition of 40 V that benefits from obtaining a good interface bonding quality.

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Effect of electromagnetic centrifugal casting on solidification microstructure of cast high speed steel roll

Cited by 11 publications

References 4 publications

A study of heat treatment of high‐boron high‐speed steel roll

A study of heat treatment of high‐boron high‐speed steel roll

Effect of isothermal quenching methods on impact toughness and wear resistance in high boron steel

Simulation of Compound Rolls Produced by Electroslag Remelting Cladding Method

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