Investigations on microstructures and properties of B containing cast steel for wear resistance applications

Fu, H.; Lei, Yongping; Xing, Jiandong; Huang, Linghui

doi:10.1179/174328108x271484

Cited by 21 publications

(11 citation statements)

References 16 publications

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“…Meanwhile, for the martensite matrix in Fe-B cast alloy and Cr15 white cast iron, the SiC abrasive can easily cut into the matrix. Even for the eutectic (Cr, Fe) 7 C 3 carbides in Cr15 white cast iron with the hardness of 1,370-1,450 HV [22], the tested carbides can also be broken by abrasion particles in the form of micro cutting. Figure 14 shows the worn surfaces of Cr15 white cast iron and C 5 alloy under 50 N load.…”

Section: Heat Treatment Microstructure and Hardness Of Fe-b Cast Alloymentioning

confidence: 97%

Investigations on Microstructures and Two-body Abrasive Wear Behavior of Fe–B Cast Alloy

Xing

et al. 2011

Tribol Lett

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The microstructures of Fe-B alloys containing different carbon and boron concentrations have been investigated. The solidification microstructures of Fe-B alloy consist of the eutectic boride, pearlite, and ferrite. Borides precipitate along the grain boundary during the formation of eutectic. After heat treatment, the phases in Fe-B alloy are composed of the boride and martensite. With increase of carbon and boron concentrations, the Rockwell hardness of Fe-B alloy becomes larger. Meanwhile, by using a pin-on-disk abrasion tester, the effects of carbon and boron concentrations on the wear behaviors including ploughing depth, roughness, and wear weight loss under different loads have been studied. The results show that the wear resistance of Fe-B alloy with higher carbon and boron concentrations is comparable with the high chromium white cast iron.

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Section: Heat Treatment Microstructure and Hardness Of Fe-b Cast Alloymentioning

confidence: 97%

Investigations on Microstructures and Two-body Abrasive Wear Behavior of Fe–B Cast Alloy

Xing

et al. 2011

Tribol Lett

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“…Some researchers have reported that the addition of boron element in the high chromium cast steel can increase the hardness and improve the abrasion resistance of high chromium cast steel [11,12]. The proper boron concentration in the low alloy cast steel benefits to obtain high hardness boride and improves the wear resistance of cast steel [13,14], which also reduces the addition of scarce nickel, molybdenum, and tungsten elements, and therefore decrease the production cost of wear resistant cast steel.…”

Section: Introductionmentioning

confidence: 97%

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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“…In the specimen with B doping, ∼2.5 m sized B-rich second phase particles precipitated. These particles can be found even after aging for 200 h at 500 • C. Microprobe analysis shows the composition of these particles to be (FeAl) 2 B. Fu et al also found that the water-quenching can induce the formation of eutectic Fe 2 B along the grain boundaries in B-containing cast steels [12]. These particles were not found in specimens without B doping.…”

Section: Methodsmentioning

confidence: 91%

“…This is due to the precipitation of boride particles in the B-doped specimen. Fu et al [12] also found that the borides distributed along the grain boundaries can enhance the hardness and strength. After water-quenching and aging for 200 h, the B-doped steel sustains a plastic strain of about 8% before failure, compared with ∼1% for the B-free steel.…”

Section: Figurementioning

confidence: 95%