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Филиппов, М. А.; Lhagvadorzh, P.; Plotnikov, G. N.

doi:10.1023/a:1010415627668

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…2 The carbon concentration in martensite, according to the micro-X-ray and X-ray diffraction analysis, was close to 0.6%. It correlates with the values obtained for cast iron 260kh16M3 by the calculation method [2].…”

Section: Resultssupporting

confidence: 84%

“…A high level of hardening is not achieved due to the formation of strain-induced martensite with carbon content below 0.6%. The austenite becomes too stable relative to strain-induced martensitic transformation at carbon concentration exceeding 0.7% [2]. There is a good correlation of the maximum values of relative wear resistance with those of microhardness on the working surface after wear.…”

Section: Resultsmentioning

confidence: 85%

“…It is characteristic in this case that the chemical composition of the metal base must have a carbon content of 0.6-0.7% and the corresponding combination of chromium and other alloying elements to ensure the condition 20 ºС < М s , М f > 20 ºС. Thus, martensite transformation develops mainly in the process of operation [2,3]. A high level of hardening is not achieved due to the formation of strain-induced martensite with carbon content below 0.6%.…”

Section: Resultsmentioning

confidence: 99%

“…The most wear-resistant cast irons have an average carbon content of 2.3-2.7% and a chromium content of 12-18%, with carbides of the M 7 C 3 type. In some cases, high-chromium cast iron with 23-28% of chromium is used, especially under conditions of abrasion-corrosion wear [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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Heat treatment forming a dissipative metal base in wear-resistant chromium-alloyed cast iron

Филиппов¹,

Nikiforova²,

Shveykin³

et al. 2018

AIP Conference Proceedings

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heat treatment forming a dissipative metal base in wear-resistant chromium-alloyed cast iron

Филиппов¹,

Nikiforova²,

Shveykin³

et al. 2018

AIP Conference Proceedings

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“…High-chromium white irons are widely used in the mineral processing industry due to their excellent wear behavior under abrasive conditions. A microstructure consisting of a network of hard eutectic M 7 C 3 carbides in a mainly austenitic (as-cast) or martensitic (after a heat treatment) matrix makes these irons very suitable for severe wear applications [1][2][3][4]. To improve abrasive behavior in the as-cast iron, an increase in carbon and chromium would increase the carbide volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Niobium Additions to a 15%Cr–3%C White Iron and Its Effects on the Microstructure and on Abrasive Wear Behavior

Bedolla-Jacuinde

Guerra

Mejı́a

et al. 2019

Metals

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From the present study, niobium additions of 1.79% and 3.98% were added to a 15% Cr–3% C white iron, and their effects on the microstructure, hardness and abrasive wear were analyzed. The experimental irons were melted in an open induction furnace and cast into sand molds to obtain bars of 45 mm diameter. The alloys were characterized by optical and electron microscopy, and X-ray diffraction. Bulk hardness was measured in the as-cast conditions and after a destabilization heat treatment at 900 °C for 30 min. Abrasive wear resistance tests were undertaken for the different irons according to the ASTM G65 standard in both as-cast and heat-treated conditions under three loads (58, 75 and 93 N). The results show that niobium additions caused a decrease in the carbon content in the alloy and that some carbon is also consumed by forming niobium carbides at the beginning of the solidification process; thus decreasing the eutectic M7C3 carbide volume fraction (CVF) from 30% for the base iron to 24% for the iron with 3.98% Nb. However, the overall carbide content was constant at 30%; bulk hardness changed from 48 to 55 hardness Rockwell C (HRC) and the wear resistance was found to have an interesting behavior. At the lowest load, wear resistance for the base iron was 50% lower than that for the 3.98% Nb iron, which is attributed to the presence of hard NbC. However, at the highest load, the wear behavior was quite similar for all the irons, and it was attributed to a severe carbide cracking phenomenon, particularly in the as-cast alloys. After the destabilization heat treatment, the wear resistance was higher for the 3.98% Nb iron at any load; however, at the highest load, not much difference in wear resistance was observed. Such a behavior is discussed in terms of the carbide volume fraction (CVF), the amount of niobium carbides, the amount of martensite/austenite in matrix and the amount of secondary carbides precipitated during the destabilization heat treatment.

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