The effect of carbide volume fraction on the low stress abrasion resistance of high Cr-Mo white cast irons

Fulcher, J.K.; Kosel, T.H.; Fiore, N.F.

doi:10.1016/0043-1648(83)90272-7

Cited by 82 publications

(43 citation statements)

References 4 publications

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“…[16] Another wear mechanism present in these alloys is the pit formation along the carbide-matrix interface. [17,18] On the other hand, the better high stress abrasion resistance of alloy 700 may be attributed not only to the higher carbide concentration but mainly to the presence of hard fine spherulitics carbides (TiNbW)C and, to some extent, of undiluted particles of (TiW)C complex carbide homogeneously dispersed in the eutectic matrix. It is suggested that these reinforcing particles firmly supported by the matrix minimized the effect of eventual deformation and spalling of the (TiNb)C carbide dendrites and avoided a severe abrasive wear of the matrix.…”

Section: B Microstructurementioning

confidence: 99%

Development of an Iron-Based Hardfacing Material Reinforced with Fe-(TiW)C Composite Powder

Corrêa

Alcântara

Tecco

et al. 2007

Metall Mater Trans A

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The objective of this work is to investigate the correlation of microstructure with wear resistance in a hardfacing material reinforced with Fe-(TiW)C composite powder particles. This material was designed for cladding components subjected to highly abrasive conditions and was deposited on a low-carbon steel substrate by open arc welding. The theoretical and experimental work undertaken includes solidification study, microstructural characterization, and abrasive wear testing. Microstructural analysis of the hardfaced top layer of the alloy showed the presence of TiWC carbide particles and TiNbC carbides randomly distributed in a eutectic mixture matrix c/M 7 C 3 containing primary austenite dendrites. Microstructural examinations also showed that hard and fine spherulitic carbides, in which a Ti-rich MC carbide core was encircled by MC carbide enriched with Nb and W, were homogeneously distributed in the matrix. The energy-dispersive spectroscopy (EDS) mapping of spherulitic carbides showed that the any added Nb replaced a significant part of W in the Fe-(TiW)C powder, and W preferentially partitioned into other carbides and matrix during solidification. Abrasion test results showed that the preceding carbides improve the wear resistance of the hardfacing material in comparison with conventional Fe-Cr-C and Fe-Cr-C-Nb alloys, especially under high stress conditions.

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Section: B Microstructurementioning

confidence: 99%

Development of an Iron-Based Hardfacing Material Reinforced with Fe-(TiW)C Composite Powder

Corrêa

Alcântara

Tecco

et al. 2007

Metall Mater Trans A

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“…[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] The processing variables determine the macro-and microstructure of the WCIs which, in turn, influence the abrasion behavior of these materials. In the case of high Cr WCIs, important microstructural parameters for wear resistance include the quantity, orientation, and morphology of carbides, [29,30,[33][34][35][36]39,40] the type of matrix, [31,35,[39][40][41][42] and the overall macrostructure of the castings. [26][27][28][29][30] These factors also influence the hardness and fracture toughness of the material.…”

Section: Introductionmentioning

confidence: 99%

Solidification structure and abrasion resistance of high chromium white irons

Doğan

Hawk

Laird

1997

Metall Mater Trans A

266

124

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Superior abrasive wear resistance, combined with relatively low production costs, makes high Cr white cast irons (WCIs) particularly attractive for applications in the grinding, milling, and pumping apparatus used to process hard materials. Hypoeutectic, eutectic, and hypereutectic cast iron compositions, containing either 15 or 26 wt pct chromium, were studied with respect to the macrostructural transitions of the castings, solidification paths, and resulting microstructures when poured with varying superheats. Completely equiaxed macrostructures were produced in thick section castings with slightly hypereutectic compositions. High-stress abrasive wear tests were then performed on the various alloys to examine the influence of both macrostructure and microstructure on wear resistance. Results indicated that the alloys with a primarily austenitic matrix had a higher abrasion resistance than similar alloys with a pearlitic/bainitic matrix. Improvement in abrasion resistance was partially attributed to the ability of the austenite to transform to martensite at the wear surface during the abrasion process.

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“…8,9) The carbide volume can be calculated from 10) %carbide volume ¼ 12:33ð%CÞ þ 0:55ð%CrÞ À 15:2 Under the low stress abrasion conditions, several researchers have found that increasing carbide volume improves the abrasion resistance. 10) High chromium cast iron commonly form the M 7 C 3 carbide as the eutectic carbide, which has a hardness greater than that of silica as shown in Table 4, and would therefore be expected to show excellent wear resistance against this abrasive.…”

Section: Abrasive Wear Resistancementioning

confidence: 99%

Effect of Heat Treatment on Microstructure and Properties of Semi-solid Chromium Cast Iron

2004

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Semi-solid processed 18% Cr and 27% Cr cast irons were produced by using copper cooling plate and metal mold. A series of experiments were carried out to clarify the effect of heat treatment on microstructure, hardness, wear properties, and corrosion characteristics. The results show that 27% Cr alloys possess better abrasive resistance than 18% Cr alloys due to higher carbide volume under all the conditions when tested by dry sand rubber wheel with silica abrasive. However 18% Cr alloys show higher wear resistance than 27% Cr alloys when using super hard alloy disk against the specimen plate surface. The harder disk indent into the carbides, leads to spalling and pitting, and therefore greater wear rate. For the corrosion test result, 27% Cr alloys have better corrosion resistance than 18% Cr alloys as a result of higher chromium content. A combination of semi-solid processing and heat treatment improves wear resistance and corrosion resistance of chromium cast iron.

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The effect of carbide volume fraction on the low stress abrasion resistance of high Cr-Mo white cast irons

Cited by 82 publications

References 4 publications

Development of an Iron-Based Hardfacing Material Reinforced with Fe-(TiW)C Composite Powder

Development of an Iron-Based Hardfacing Material Reinforced with Fe-(TiW)C Composite Powder

Solidification structure and abrasion resistance of high chromium white irons

Effect of Heat Treatment on Microstructure and Properties of Semi-solid Chromium Cast Iron

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