Effect of the structure of chromium-vanadium white irons on their wear resistance

Sil'man, G. I.; Памфилов, Е. А.; Gryadunov, S. S.; Gruvman, A. I.

doi:10.1007/s11041-007-0076-8

Cited by 6 publications

(2 citation statements)

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“…From the data given in literature it follows that there are still various problems that occur during manufacture of this material and have not been properly solved until the present day [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Hence every attempt is welcome if only it can improve the properties of chromium iron castings.…”

Section: Introductionmentioning

confidence: 99%

Equiaxed and Oriented Microstructure in High Chromium Cast Iron

Kopyciński¹,

Guzik²,

Szczęsny³

2014

Archives of Metallurgy and Materials

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It has been proved that an addition of boron carbide and shredded steel scrap introduced as an inoculants to the chromium white cast iron changes the microstructure of castings. The operation increases the number of crystallization nuclei of M 7 C 3 carbides. In this case the B 4 C carbides act as substrates for the nucleation of M 7 C 3 (chromium carbides). Castings after B 4 C inoculation have fine grain fracture surface. Primary precipitates of chromium carbide also appeared, lowering the mechanical properties of as-cast parts. Additionally, in order to increase the mechanical properties of chromium cast iron, unidirectional solidification was used. In this case, 0.3 wt. % cerium was used as inoculant.Keywords: Inoculation, bulk and unidirectional solidification, mechanical properties W pracy wykazano, że wprowadzenie do żeliwa chromowego dodatków modyfikatora w postaci węglika B 4 C oraz złomu stalowego w postaci rozdrobnionej powoduje zmianę struktury odlewu oraz właściwości wytrzymałościowych. Wprowadzenie B 4 C zwiększa liczbę zarodków krystalizacji węglika chromu M 7 C 3 . Struktura odlewu po zabiegu modyfikacji węglikiem boru charakteryzowała się drobnoziarnistym przełomem. W pracy wyjaśniono problem pojawienia się pierwotnych wydzieleń węglika chromu w strukturze, które to węgliki wpływają na obniżenie właściwości wytrzymałościowych surowych odlewów. Dodatkowo w pracy zastosowano kierunkową krystalizację, w celu zwiększenia właściwości mechanicznych żeliwa chromowego. W tym przypadku jako modyfikatora użyto 0,3% mas. ceru.

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Section: Introductionmentioning

confidence: 99%

Equiaxed and Oriented Microstructure in High Chromium Cast Iron

Kopyciński¹,

Guzik²,

Szczęsny³

2014

Archives of Metallurgy and Materials

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“…In the case of products made from this type of cast iron, the control of the physicochemical state of liquid metal consists in producing, in the cast iron structure, proper metal matrix and complex carbide precipitates in the required amount, type and distribution. By introducing to cast iron a large amount of alloying elements such as chromium [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], vanadium [21][22][23] and, alloyed white cast iron with interesting functional properties is obtained. …”

Section: Introductionmentioning

confidence: 99%

Analysis of the Structure and Abrasive Wear Resistance of White Cast Iron with Precipitates of Carbides

Kopyciński¹,

Kawalec²,

Szczęsny³

et al. 2013

Archives of Metallurgy and Materials

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The resistance of castings to abrasive wear depends on the cast iron abrasive hardness ratio. It has been anticipated that the white cast iron structure will be changed by changing the type of metal matrix and the type of carbides present in this matrix, which will greatly expand the application area of castings under the harsh operating conditions of abrasive wear. Detailed metallographic analysis was carried out to see the structure obtained in selected types of white cast iron, i.e. with additions of chromium and vanadium. The study compares the results of abrasive wear resistance tests performed on the examined types of cast iron.Keywords: Abrasive wear resistance, white cast iron, intermetallic phase, type of carbides: (Fe,Cr) 3 C, (Fe,Cr) 7 C 3, VC, TiC Odporność żeliwa na zużycie ścierne zależy od stosunku twardości metalu i ścierniwa. W pracy założono kształtowanie struktury żeliwa białego w wyniku zmiany rodzaju osnowy metalowej oraz węglików, co znacznie rozszerza obszar zastosowania odlewu w trudnych warunkach zużycia ściernego. Przeprowadzono szczegółową analizę metalograficzną struktury wybranych gatunków żeliwa białego t.j.: chromowego oraz wanadowego. W niektórych przypadkach zaproponowano koncepcję sterowania ilością i rodzajem węglików w osnowie metalowej żeliwa lub wprowadzania dodatkowych węglików do struktury eutektycznej tego rodzaju żeliwa. Ponadto w pracy porównano wyniki badań odporności na zużycie ścierne analizowanych gatunków żeliwa.

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The Inoculation of White Cast Iron

Kopyciński¹

2013

TMS2013 Supplemental Proceedings

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It has been proved that an addition of boron carbide introduced as an inoculant to the chromium white cast iron changes the structure of castings. Castings after inoculation revealed a different structure with numerous grains. Primary precipitates of chromium carbide also appeared, reducing the mechanical properties of as-cast parts. Properly established heat treatment regime makes chromium iron castings regain their, originally high, mechanical properties.

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Effect of the structure of chromium-vanadium white irons on their wear resistance

Cited by 6 publications

References 0 publications

Equiaxed and Oriented Microstructure in High Chromium Cast Iron

Equiaxed and Oriented Microstructure in High Chromium Cast Iron

Analysis of the Structure and Abrasive Wear Resistance of White Cast Iron with Precipitates of Carbides

The Inoculation of White Cast Iron

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