Microstructure and Mechanical Property of Copper Bearing Eutectoid Steel

Murakami, Masahirô; Takanaga, Youhei; Nakada, Nobuo; Tsuchiyama, Toshihiro; Takaki, Setsuo

doi:10.2355/isijinternational.48.1467

Cited by 14 publications

(6 citation statements)

References 14 publications

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“…Most of the precipitation occurs in the ferrite and at the interface between cementite and ferrite, but a small portion may also occur in the cementite constituent of pearlite. Murakami et al [15) have studied the precipitation of epsilon-Cu during isothermal growth of pearlite in steels (0.8 wt.% carbon, 0.26 wt.% silicon and 0.35 wt.% manganese) alloyed with 0.06, 1.06 and 2.06 wt.% copper. ln the case of the alloy with 2.06 wt.% Cu, they observed that epsilon-Cu precipi tates bath at the ferrite/austenite interface and in ferrite at 923 K (650°C), whereas it precipitates mainly in ferrite at 873 K (600°().…”

Section: Resultsmentioning

confidence: 99%

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Extrema of micro-hardness in fully pearlitic compacted graphite cast iron

Lacaze

Moussa

Thébault

et al. 2020

International Journal of Cast Metals Research

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For improving the mechanical strength of cast irons, a fully pearlitic matrix is sought by alloying with tin, copper and manganese. This applies in particular to the compacted graphite irons considered here. While average macro-and micro-hardness values were similar for the four fully pearlitic alloys under study, it was found that high copper and low tin content showed some very high maximum micro-hardness values, significantly higher than the corresponding mean. Such values may be seen as hard points in the material that would certainly impair machinability. Discussion of the reasons for these extreme values opens directions for further studies.

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Section: Resultsmentioning

confidence: 99%

“…Considering the evolution of micro-hardness dur ing heat-treatment demonstrated by Murakami et al [15), an attempt to use differential thermal analysis on the cast irons under study -as previously done for 15-5 PH alloy [13) -was carried out. This was not 1300 .…”

Section: Resultsmentioning

confidence: 99%

Extrema of micro-hardness in fully pearlitic compacted graphite cast iron

Lacaze

Moussa

Thébault

et al. 2020

International Journal of Cast Metals Research

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“…during pearlite formation (e.g., carbides due to microalloying Ti, V, or Nb, [72][73][74][75] and Cu precipitation [76] ) on austenite-pearlite interface or within pearlite. Preexisting phase changes the composition of austenite from which pearlite forms, hence its thermodynamic driving force.…”

Section: B Influence Of Other Phasesmentioning

confidence: 99%

Pearlite in Multicomponent Steels: Phenomenological Steady-State Modeling

Yan¹,

Ågren²,

Jeppsson³

2020

Metall Mater Trans A

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A steady-state model for austenite-to-pearlite transformation in multicomponent steel is presented, including Fe, C, and eight more elements. The model considers not only classic ingredients (formation of ferrite-cementite interface, volume diffusion, boundary diffusion, and optimization of lamellar spacing) but also finite austenite-pearlite interfacial mobility that resolves some previous difficulties. A non-Arrhenius behavior of interfacial mobility is revealed from growth rate and lamellar spacing data. A smooth and physical transition between orthopearlite and parapearlite is realized by optimizing the partitioning of substitutional alloying elements between ferrite and cementite to maximize growth rate or dissipation rate while keeping carbon at equilibrium. Solute drag effect is included, which accounts for the bay in growth rate curves. Grain boundary nucleation rate is modeled as a function of chemical composition, driving force, and temperature, with consideration of grain boundary equilibrium segregation. Overall transformation kinetics is obtained from growth rate and grain boundary nucleation rate, assuming pearlite colonies only nucleate on austenite grain boundaries. Further theoretical and experimental work are suggested for generalization and improvements.

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“…The dispersed and fine Cu-precipitated phase gave the antibacterial ability of copper-bearing steel, through a special antibacterial heat treatment technology in the process. [14,15] The solution treatment provides uniform microstructure and controllable grain size, while the aging treatment leads to the precipitation of a fine phase from the supersaturated solid solution. [1] The regulation of the precipitation behavior of ε-Cu generated during the antibacterial heat treatment has been investigated using different solutions temperatures, aging temperatures, and aging times.…”

Section: Introductionmentioning

confidence: 99%

Effect of aging temperature on corrosion resistance and antibacterial ability of 0Cu2Cr carbon steel

Guo

Teng

et al. 2021

Materials & Corrosion

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The effect of heat treatment on the corrosion resistance and antibacterial ability of 0Cu2Cr carbon steel was studied using scanning electron microscopy, transmission electron microscopy, laser scanning confocal microscopy, and electrochemistry. The results showed that the peak aging state with complete crystal growth and uniform precipitate phase distribution was attained at the aging temperature of 850°C. Both the Cu‐rich phase with an approximately spherical structure and the dispersive Cu‐ordered phase with a B2 structure were observed in the grain boundary and internal crystal and effectively improved the hardness of the steel because of precipitation strengthening. Thus, the corrosion resistance and antibacterial ability of the 0Cu2Cr carbon steel could be improved by aging it at 850°C.

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Microstructure and Mechanical Property of Copper Bearing Eutectoid Steel

Abstract: Fig. 12. Relation between 0.2 % proof stress and lamellar spacing in Base-steel, 1 % Cu-steel and 2 % Cu-steel.

Cited by 14 publications

References 14 publications

Extrema of micro-hardness in fully pearlitic compacted graphite cast iron

Extrema of micro-hardness in fully pearlitic compacted graphite cast iron

Pearlite in Multicomponent Steels: Phenomenological Steady-State Modeling

Effect of aging temperature on corrosion resistance and antibacterial ability of 0Cu2Cr carbon steel

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