Effects of Destabilization Temperature on the Microstructure and Mechanical Properties of High Chromium Cast Iron

Lai, Jun; Pan, Qing‐Jiang; Wang, Z. B.; Cui, Haoran; Wang, X. D.; Gao, Zhanqi

doi:10.1007/s11665-017-2943-9

Cited by 13 publications

(12 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Tempering treatment has the additional objective of transforming retained austenite into lower bainite. Usual tempering temperatures for high-Cr white irons vary in the range of 400-600 • C while the tempering time could last between 2 and 6 h [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hardness, Sliding Wear and Strength of a Hypoeutectic White Iron with 25%Cr after Heat Treatments

González-Pociño

Lozano

Álvarez-Antolín

et al. 2021

Metals

View full text Add to dashboard Cite

Hypoeutectic white cast irons with a high chrome content are commonly used in the industrial mining sector where there is a demand for both high resistance to adhesive wear and an acceptable toughness for the absorption of impacts and falls of diverse materials. Through the application of a design of experiment (DoE) technique, factors related to thermal treatment are analyzed with respect to resistance to sliding wear, maximum rupture stress and toughness. The results show that, in order to increase resistance to adhesive wear, it is convenient to use destabilization temperatures of 1050 °C and tempering of two hours at 400 °C. This foments a very hard martensite and a high proportion of highly alloyed retained austenite, which, with low tempering, achieves a precipitation of carbides from this austenite with hardly any loss of hardness of the martensite. In order to increase the energy which this material is capable of absorbing until breakage, furnace cooling set at 150 °C followed by tempering at 550 °C would be favorable. Slower cooling implies a greater quantity of conditioned retained austenite, so that, following this, it may be transformed into lower bainite with a high density of finely dispersed precipitated carbides. Furthermore, this tempering also allows the transformation of martensite into ferrite with finely dispersed carbides.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of Hardness, Sliding Wear and Strength of a Hypoeutectic White Iron with 25%Cr after Heat Treatments

González-Pociño

Lozano

Álvarez-Antolín

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…The focus of research is reducing material wear rate [2]. Some techniques have been adopted to further enhance HCCI's mechanical properties and expand its application range, such as alloying [3][4][5][6][7][8][9][10][11][12][13], modification treatment [14,15] and heat treatment [3,[16][17][18][19][20][21]. These techniques can strengthen HCCI's matrix, optimize its microstructure, and adjust M 7 C 3 type carbide's size and morphology.…”

Section: Introductionmentioning

confidence: 99%

Sintering Preparation of 15 wt% Cr Cast Iron as well as Its Mechanical Properties and Impact Abrasive Wear

Xiao

Brânduşan

et al. 2020

Period. Polytech. Chem. Eng.

View full text Add to dashboard Cite

15 wt% Cr sintered High Chromium Cast Iron (HCCI) with full density was successfully prepared by Super-solidus Liquid Phase Sintering (SPLS) technique, with water atomized 15 wt% Cr high chromium cast iron powder as initial materials. Its densification behavior and microstructure evolution in SPLS process and mechanical properties were investigated systematically. Additionally, the impact abrasive wear resistance under different impact energies were also analyzed and compared with another sintered HCCI with 20 wt% Cr. The results indicated that sintering temperature has a strong influence on the sintered alloy’s density, hardness, impact toughness and bending strength. The M7C3 type (M is Cr and Fe) carbides were obviously coarsened as temperature increased and their rod-shaped branches were fully developed at the same time, thereby resulting in carbide network formation in the matrix. The reasonable sintering temperature range was 1195–1205 °C, and the optimum mechanical properties had the hardness of 63.9 HRC, bending strength of 2112.65 MPa and impact toughness of 7.92 J/cm2. What is more important impact abrasive wear test results indicated 15 wt% Cr sintered HCCI’s wear resistance could be comparable to 20 wt% Cr sintered HCCI under impact energy 1~3 J/cm2, and it is more cost effective.

show abstract

“…High Chromium Cast Iron (HCCI) containing 11~30 wt% chromium and 2.0~4.3 wt% carbon has been known as the best antifriction material in the world [1,2,3,4]. Due to its good wear resistance and corrosion resistance, HCCI is widely used in building, metallurgy, machinery, chemical industry and other fields [5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Electric Current Pulse on Microstructure and Corrosion Resistance of Hypereutectic High Chromium Cast Iron

Zhou

et al. 2018

Materials

View full text Add to dashboard Cite

The effect of electric current pulse on the microstructure and corrosion resistance of hypereutectic high chromium cast iron was explored. The morphology of carbides in solidification microstructure was observed by an optical microscope and a scanning electron microscope and the composition was determined by an electron probe micro-analyzer. The microhardness of primary carbides and corrosion resistance of samples were also compared. Under the active of electric current pulse, the microstructure of hypereutectic high chromium cast iron was homogenized and its performance improved accordingly. On treatment by electric current, the morphology of primary carbides changed from thick long rods to hexagonal blocks or granular structures. The interlayer spacing of eutectic carbide decreased from ~26.3 μm to ~17.8 μm. Size statistics showed that the average diameter of primary carbide decreased from ~220 μm to ~60 μm. As a result, microhardness increased from 1412 HV to 1511 HV. No obvious microcrack propagation was found at the microindentation sites. The average length of microcracks decreased from ~20.7 μm to ~5.7 μm. Furthermore, corrosion resistance was remarkably enhanced. The average corrosion rate decreased from 2.65 mg/cm2·h to 1.74 mg/cm2·h after pulse current treatment.

show abstract

Effects of Destabilization Temperature on the Microstructure and Mechanical Properties of High Chromium Cast Iron

Cited by 13 publications

References 19 publications

Evaluation of Hardness, Sliding Wear and Strength of a Hypoeutectic White Iron with 25%Cr after Heat Treatments

Evaluation of Hardness, Sliding Wear and Strength of a Hypoeutectic White Iron with 25%Cr after Heat Treatments

Sintering Preparation of 15 wt% Cr Cast Iron as well as Its Mechanical Properties and Impact Abrasive Wear

Effect of Electric Current Pulse on Microstructure and Corrosion Resistance of Hypereutectic High Chromium Cast Iron

Contact Info

Product

Resources

About