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Tabrett, C. P.; Sare, I.R.

doi:10.1023/a:1004755511214

Cited by 46 publications

(22 citation statements)

References 7 publications

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“…The onset of solidification coincided with the formation of primary austenite while the binary eutectic phase of austenite and Cr 7 C 3 transformed from the remaining melt. At room temperature and in the as-solidified condition, both types of austenite (primary and eutectic) were present as retained austenite [32][33][34][35][36][37][38][39]. The details of microstructural investigation of the samples coated by FeCrC powders are given in Ref.…”

Section: Microstructure Characterizationmentioning

confidence: 99%

Effects of silicon content on the microstructure and corrosion behavior of Fe–Cr–C hardfacing alloys

Azimi

Shamanian

2010

Journal of Alloys and Compounds

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Section: Microstructure Characterizationmentioning

confidence: 99%

Effects of silicon content on the microstructure and corrosion behavior of Fe–Cr–C hardfacing alloys

Azimi

Shamanian

2010

Journal of Alloys and Compounds

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“…This initial morphology can be notably modified by the utilisation of various critical and subcritical heat treatments, the purpose of which is the precipitation of secondary carbides and the transformation of the destabilised austenite into more desirable morphologies, such as martensite. The critical heat treatments are usually conducted at 920-1060uC for 1-6 h. [1][2][3][4][5][6][7][8][9][10] The subcritical heat treatments usually follow the critical heat treatment and are carried out at 200-600uC for 2-6 h. [1][2][3][4][5][6][7][8][9][10] Various research efforts have been focused on the formation, morphology and characteristics of the secondary carbides formed during the heat treatments. They have shown that the crystallography, stoichiometry, orientation and extent of formation of these carbides are issues associated with compositional characteristics of the initial material and process parameters during heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of high chromium cast irons: effect of heat treatments and alloying additions

Karantzalis

Lekatou

Mavros

2009

International Journal of Cast Metals Research

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Different combinations of critical and subcritical heat treatments variously modify the initial as cast microstructure of high chromium white cast irons leading to secondary carbide precipitation of different extent and nature. Destabilisation (critical heat treatment) of austenite at 970uC for 2?5 h followed by annealing (subcritical heat treatment) at 600uC for 13 h results in massive precipitation of M 23 C 6 carbide particles along with spheroidised M 7 C 3 . The reversed order of heat treatments leads to extensive precipitation of M 7 C 3 secondary carbide particles. Mo has a favouring effect on the hardness of the microstructures containing pearlite by limiting pearlite formation. The gradual increase in the alloying additions, C and Cr, increases the hardness of the materials at the different treatment states by inducing carbide precipitation. The increase in the Si content leads to the opposite effect by favouring pearlite formation.

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“…Most researchers believe that cryogenic treatment will fully promote the transformation of retained austenite into martensite and lead to improvement of wear resistance [7]. A little improvement in hardness of die steel, tool steel and 4140 steel has been reported by D. Das et al [8], A. Molinari et al [9] and A. Oppenkowsk et al [10], when the cryogenic treatment process was performed after conventional heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Effect of deep cryogenic treatment and tempering on microstructure and mechanical behaviors of a wear-resistant austempered alloyed bainitic ductile iron

Chen

Cui

Tong

2015

MATEC Web of Conferences

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Abstract. In this paper, the effect of deep cryogenic treatment in combination with conventional heat treatment process was investigated on microstructure and mechanical behaviors of alloyed bainitic ductile iron. Three processing schedules were employed to treat this alloyed ductile iron including direct tempering treatment, tempering.+deep cryogenic treatment and deep cryogenic treatment.+tempering treatments. The microstructure and mechanical behavior, especially the wear resistance, have been evaluated after treated by these three schedules. The results show that martensite microstructure can be obviously refined and the precipitation of dispersed carbides is promoted by deep cryogenic treatment at .−196 • C for 3 h after tempered at 450 • C for 2 h. In this case, the alloyed bainitic ductile iron possesses rather high hardness and wear-resistance than those processed by other two schedules. The main wear mechanism of the austempered alloyed ductile iron with deep cryogenic treatment and tempering is micro-cutting wear in association with plastic deformation wear.

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Untitled

Cited by 46 publications

References 7 publications

Effects of silicon content on the microstructure and corrosion behavior of Fe–Cr–C hardfacing alloys

Effects of silicon content on the microstructure and corrosion behavior of Fe–Cr–C hardfacing alloys

Microstructure and properties of high chromium cast irons: effect of heat treatments and alloying additions

Effect of deep cryogenic treatment and tempering on microstructure and mechanical behaviors of a wear-resistant austempered alloyed bainitic ductile iron

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