Effect of Carbon Content on Heat Treatment Behavior of Multi-Alloyed White Cast Iron for Abrasive Wear Resistance

Opapaiboon, Jatupon; Sricharoenchai, Prasonk; Inthidech, Sudsakorn; Matsubara, Yoichi

doi:10.2320/matertrans.m2015001

Cited by 14 publications

(12 citation statements)

References 3 publications

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“…The tempering temperatures for martensite usually fall within the 200–250 °C range. However, it would be possible to achieve a second destabilization of the retained austenite at temperatures between 400 and 600 °C [4,16,17]. This would favour its transformation into martensite during cooling after this tempering [18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Thermal Parameters Related to Destabilization Treatments on Erosive Wear Resistance and Microstructural Variation of White Cast Iron Containing 18% Cr. Application of Design of Experiments and Rietveld Structural Analysis

2019

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High-Cr hypo-eutectic white cast irons are used in very demanding environments that require high resistance to erosive wear. The influence on the microstructural variation and erosive wear resistance of several fundamental factors related to the thermal treatments of these cast irons was analysed by means of a fractional Design of Experiments (DoE). These factors included the ones related to the destabilization of austenite. The precipitated phases were identified by X-ray diffraction (XRD), while the Rietveld structural refinement method was used to determine their percentages by weight. Erosion wear resistance was calculated using the test defined by ASTM G76. It was concluded that the quench cooling medium does not significantly influence either erosive wear resistance or the proportion of martensite or retained austenite. The destabilization temperature is a key factor with respect to the percentage of retained austenite. In order to increase the amount of martensite and decrease the amount of retained austenite, temperatures not exceeding 1000 °C are required. An increase of 100 °C in the destabilization temperature can lead to a 25% increase in retained austenite. Moreover, tempering temperatures of around 500 °C favour an additional increase in the percentage of martensite. Erosive wear commences on the matrix constituent without initially affecting the eutectic carbides. Once the deterioration of the matrix constituent surrounding these carbides occurs, they are released. High tempering times provide an increase in resistance to erosive wear due to a second destabilization of austenite during the said tempering.

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Section: Introductionmentioning

confidence: 99%

Influence of Thermal Parameters Related to Destabilization Treatments on Erosive Wear Resistance and Microstructural Variation of White Cast Iron Containing 18% Cr. Application of Design of Experiments and Rietveld Structural Analysis

2019

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“…It has been reported 11,12) that carbon balance (C bal ) is an important factor to determine the residual C content in the matrix and it in uences the phase transformation. Therefore, the C bal should be considered when discussing the H Tmax.…”

Section: Tempered Statementioning

confidence: 99%

“…Looking back over the last 30 years, the research and development on multi-alloyed or multi-component white cast iron has been carried out on the solidi cation sequence [5][6][7] and phase transformation during heat treatment. 9,[11][12][13][14] However, systematic research on the behavior during the heat treatment, i.e., the behaviors of the hardness and the retained austenite during the heat treatment of the cast iron and variations due to the alloy content were quite few. 11,12) Therefore, the effect of the Mo content on the heat treatment behavior of multi-alloyed white cast iron with a basic composition was investigated in this work.…”

Section: Introductionmentioning

confidence: 99%

Effect of Molybdenum Content on Heat Treatment Behavior of Multi-Alloyed White Cast Iron

et al. 2017

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The effect of the Molybdenum (Mo) content on the heat treatment behavior of multi-alloyed white cast iron was investigated. The cast iron with varying Mo contents from 0.12 to 7.66% under the basic alloy composition of 5% Cr, W and V each was prepared. After annealing at 1223 K for 18 ks, the test specimens were austenitized at 1373 K for 3.6 ks in a vacuum furnace and subsequently hardened by a jet-spray of liquid nitrogen. The tempering was carried out at temperatures from 673 to 873 K at 50 K intervals for 12 ks. It was found that the hardness in the as-hardened state was increased progressively with an increase in the Mo content. The volume fraction of the retained austenite (V γ) decreased markedly when the Mo content was increased over 1.17%. In the tempered state, the hardness curve showed clear secondary hardening due to the precipitation of ne secondary carbides and a reduction of the V γ. The V γ value in each specimen decreased gradually as the tempering temperature was elevated, but reduced greatly when tempered at 748 to 823 K. The maximum tempered hardness (H Tmax) was obtained in the specimen tempered at 798 K where the V γ was less than 10%. The H Tmax increased rst, and then subsequently decreased with an increase in the Mo content. The highest H Tmax value, 946 HV30, was obtained in the specimen with 4.98%Mo. It was found that the 15-37%V γ in the as-hardened state was necessary to get the hardness over 900 HV30 by tempering. The degree of secondary hardening (ΔHs) increased as the Mo content rose from 0.12 to 4.98% where the difference between the V γ in the as-hardened state and that at H Tmax (ΔV γ) was 22-23%.

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“…Therefore, it can be said that the C is an important element to determine both the eutectic reaction and transformation of matrix. 6,7) The heat treatment of multi-alloyed white cast irons is very important to modify their mechanical and wear prop-erties. Generally, the heat treatment consists of annealing, hardening and tempering in the same way as high Cr cast iron or high speed tool steel.…”

Section: Introductionmentioning

confidence: 99%

Three-body-type Abrasive Wear Behavior of Multi-alloyed White Cast Iron with Different Carbon Contents Used for Hot Work Rolls

et al. 2021

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Effect of Carbon Content on Heat Treatment Behavior of Multi-Alloyed White Cast Iron for Abrasive Wear Resistance

Cited by 14 publications

References 3 publications

Influence of Thermal Parameters Related to Destabilization Treatments on Erosive Wear Resistance and Microstructural Variation of White Cast Iron Containing 18% Cr. Application of Design of Experiments and Rietveld Structural Analysis

Influence of Thermal Parameters Related to Destabilization Treatments on Erosive Wear Resistance and Microstructural Variation of White Cast Iron Containing 18% Cr. Application of Design of Experiments and Rietveld Structural Analysis

Effect of Molybdenum Content on Heat Treatment Behavior of Multi-Alloyed White Cast Iron

Three-body-type Abrasive Wear Behavior of Multi-alloyed White Cast Iron with Different Carbon Contents Used for Hot Work Rolls

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