Microstructure, mechanical properties and high stress abrasive wear behavior of air-cooled MnCrB cast steels

Luo, Kaishuang; Bai, Bin

doi:10.1016/j.matdes.2009.11.040

Cited by 34 publications

(17 citation statements)

References 17 publications

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“…14) Abrasive wear resistance of a material depends on many factors like hardness of the material, size, shape, amount and distribution of the second phase particles and properties of abrasive particles along with the service conditions. 10,12,[14][15][16][17] It has been reported 18) that the abrasion resistance in pearlite-carbide and ferrite-carbide microstructure depends on the volume fraction of the carbides. The abrasion resistance in pearlitecarbide microstructures increases with the increase in carbide volume fraction up to 35%, while in ferrite-carbide microstructures, the carbide volume fraction does not seem to have a significant effect on the abrasion resistance.…”

Section: Introductionmentioning

confidence: 99%

Abrasive Wear Behaviour of Heat Treated En31 Steel

et al. 2013

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Ni-Cr-Mo steels are widely used in machine part members, gears and shafts. Steels with higher carbon content (~1%) are used for heavy machine parts and bearings. Abrasive wear resistance is often a very important requirement for these high carbon steels, apart from sliding wear properties. In the present study, En31 steel was subjected to varying heat treatments to generate different microstructures. An attempt has been made to correlate the two body abrasive wear resistance with the bulk hardness and microstructures. The microstructures were studied through a combination of scanning electron microscopy (SEM), energy dispersive spectrometer attached to SEM (i.e. SEM-EDS) and X-ray diffraction (XRD). The bulk hardness decreased with increase in tempering temperature from 423 K to 848 K. The precipitation of Cr7C3 after 598 K tempering did not cause an appreciable increase in the hardness. At higher tempering temperatures (848 K), the martensite decomposed to give ferrite and cementite. The abrasive wear tests were carried out on hardened and tempered specimens. The abrasive wear mass loss increased with increase in the tempering temperature. Hardness had a direct correlation with the two body abrasive wear behaviour in En31 steel -increase in hardness increased the abrasive wear resistance. The important material removal mechanism were micro cutting and micro ploughing, the relative contribution of each to total wear loss was influenced by abrasive wear test conditions.

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Section: Introductionmentioning

confidence: 99%

Abrasive Wear Behaviour of Heat Treated En31 Steel

et al. 2013

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“…Similar observations were reported by earlier investigators. [14][15][16][17] In the present investigation, although the abrasive wear increased with increasing hardness, it was not proportional to the hardness. It needs to be noted that in the present investigation, all the samples were tempered for 3 600 s only.…”

Section: X-ray Diffraction Analysismentioning

confidence: 88%

“…10) There have been several studies on the effect of heat treatment on microstructure and wear properties of alloy steels. [11][12][13][14][15][16][17] However, abrasive wear behavior of En24 steel has not been studied as a function of heat treatment variables such as hardening and tempering temperature. Similarly, no attempt has been made in the past to correlate dislocation density as a function of hardening temperature and morphology of the martensitic microstructure.…”

Section: Introductionmentioning

confidence: 99%

Structural and Wear Characterization of Heat Treated En24 Steel

2012

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Ni-Cr-Mo steels such as En24 steel are widely used in machine part members, gears and shafts. En24 steel is generally used in the hardened and tempered condition to achieve an optimum combination of hardness and ductility. In the present study, heat treatment response of En24 steel was investigated by variation of hardening and tempering temperature in relation to microstructure and hardness. The microstructures were studied through a combination of scanning electron microscopy (SEM) and X-ray diffraction (XRD). The hardness decreased with the increase in hardening temperature from 1 123 to 1 273 K, whereas it increased slightly with the increase in hardening temperature after tempering at 823 K. The martensitic microstructure (laths) became coarser with increase in hardening temperature. The hardness results were well supplemented by XRD results (Williamson-Hall (WH) & modified WH plots and qualitatively by dislocation density). The specimens tempered at different temperatures (in the range 473-823 K) exhibited decreasing hardness with increase in tempering temperature. The abrasive wear tests were carried out on hardened and tempered specimens. The abrasive wear volume loss decreased with increase in tempering temperature, which was attributed to coarsening of martensite. The worn out specimens were observed under SEM, which revealed micro ploughing and cutting as important mechanisms of material removal during abrasive wear.

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“…[14] The multiphase microstructure of the MnCrB cast steel after air cooling consists of granule bainite plus lower bainite/martensite, which has high tensile strength and good ductility. Especially, the impact toughness of the air-cooled MnCrB cast steel can reach 111 to 164 J/cm 2 in a nonnotched impact test at room temperature, and the wear resistance of the air-cooled MnCrB cast steel is satisfactory in the high-stress abrasive wear condition.…”

Section: Introductionmentioning

confidence: 99%

“…Especially, the impact toughness of the air-cooled MnCrB cast steel can reach 111 to 164 J/cm 2 in a nonnotched impact test at room temperature, and the wear resistance of the air-cooled MnCrB cast steel is satisfactory in the high-stress abrasive wear condition. [14] At a medium-high carbon content level, it is possible that the MnCrB cast steel cracks in the process of water quenching. So, one would expect the MnCrB cast steel with an appropriately decreased carbon content to form martensite by water quenching.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Corrosion–Abrasion Wear Behavior of Low-Alloy MnSiCrB Cast Steels Containing Cu

Luo

Bai

2010

Metall Mater Trans A

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Two medium carbon low-alloy MnSiCrB cast steels containing different Cu contents (0.01 wt pct and 0.62 wt pct) were designed, and the effect of Cu on the mechanical properties and corrosion-abrasion wear behavior of the cast steels was studied. The results showed that the low-alloy MnSiCrB cast steels obtained excellent hardenability by a cheap alloying scheme. The microstructure of the MnSiCrB cast steels after water quenching from 1123 K (850°C) consists of lath martensite and retained austenite. After tempering at 503 K (230°C), carbides precipitated, and the hardness of the cast steels reached 51 to 52 HRC. The addition of Cu was detrimental to the ductility and impact toughness but was beneficial to the wear resistance in a corrosion-abrasion wear test. The MnSiCrB cast steel with Cu by the simple alloying scheme and heat treatment has the advantages of being high performance, low cost, and environmentally friendly. It is a potential, advanced wear-resistant cast steel for corrosion-abrasion wear conditions.

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Microstructure, mechanical properties and high stress abrasive wear behavior of air-cooled MnCrB cast steels

Cited by 34 publications

References 17 publications

Abrasive Wear Behaviour of Heat Treated En31 Steel

Abrasive Wear Behaviour of Heat Treated En31 Steel

Structural and Wear Characterization of Heat Treated En24 Steel

Mechanical Properties and Corrosion–Abrasion Wear Behavior of Low-Alloy MnSiCrB Cast Steels Containing Cu

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