The morphology of the carbides in high-carbon alloys such as damascus steel

Sukhanov, D. A.; Arkhangelskiy, Leonid; Plotnikova, N. V.

doi:10.17212/1994-6309-2016-4-43-51

Cited by 6 publications

(5 citation statements)

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“…However, we have convincingly shown that the structure of Damascus steel BU22А does not contain crushed ledeburite. This statement was shown to us in articles (Sukhanov, 2014;Sukhanov, Arkhangelsky, Plotnikova, Belousova, 2016;Sukhanov, Arkhangelskiy, Plotnikova, 2016;Sukhanov, Arkhangelskiy, Plotnikova, 2017). The basis of the third hypothesis laid the conclusion of Prof. Nizhnikovskaya (1982) that the plasticity of white cast irons, possible as a result to the transformation of excess carbide.…”

Section: Discussion and Resultsmentioning

confidence: 74%

Eutectic Carbides in Damascus steel Ledeburite Class (Wootz)

Sukhanov¹,

Arkhangelsky²

2017

IRJMSA

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Section: Discussion and Resultsmentioning

confidence: 74%

Eutectic Carbides in Damascus steel Ledeburite Class (Wootz)

Sukhanov¹,

Arkhangelsky²

2017

IRJMSA

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“…This form of secondary cementite is absent in the works on the plasticity of high-carbon steels such as UHCS, containing from 1.0% to 2.1% carbon [8] [9]. This form of secondary cementite has not been found in the works on the formation of the structure of high-purity Bulat steel type BU22A [10]- [15].…”

Section: Resultsmentioning

confidence: 95%

Influence of the Distribution of Excess Carbide on the Properties of Genuine Damascus Steel

Sukhanov¹,

Plotnikova²

2019

MSA

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The methods of spectral, x-ray phase and microprobe analysis show that genuine Damascus steel is a high-purity unalloyed high-carbon steel with a high phosphorus content. It is shown that phosphorus in an amount of from 0.1% to 0.2%, having a high liquation coefficient, contributes to the process of segregation of carbon in interdendritic zone in the process of crystallization. Interdendritic zone formed carbon clusters, in the process of forging transform into oblong carbides cementite. The main physical and chemical factors affecting the formation of oblong carbides are revealed. The hardness of carbide layers was determined, which was about 920 HV. The hardness of the troostite matrix was amounted about 475 HV. It is established that the cutting edge of the blade knife of Damascus steel is nothing more than a "micro-saw" consisting of parallel carbide and troostite layers. Tests are conducted on the preservation of the cutting edge sharpness of the blades knife of homogeneous structure of steel У15А (Russian) and the layered structure of genuine Damascus steel Ds15P (Indo-Persian). Found that with little effort cut (to 4 kg) ancient Damascus steel (Ds15P) shows a greater number of cuts than the modern instrument steel У15А. With an increase, force on the cutting edge from 6 kg to 12 kg carbon Tool steel is showed a more number of cutting on the 25% than in genuine Damascus steel. The fatigue crack propagation in the true Layered structure of Damascus steel Ds15P occurs for a greater number of cycles than in a homogeneous structure of the steel У15А. The blade knife of genuine Damascus steel, in terms of fatigue reliability (survivability), has almost 2 times longer service life than the blade knife of the modern carbon tool steel type У15А. It is proved that loss in cutting ability of a genuine Damascus steel compensates increased the reliability ("survivability") of the blade knife with fatigue loads.

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“…So, in the work of Anosov [2] it was shown that after prolonged annealing, for three days, at a temperature of about 850˚C... 950˚C, cast steel may be converted to Damascus steel. In works [9] [10] [11], they described in detail the stages of the increase ductility of highcarbon alloys containing 2.25% carbon, in the during the high-temperature isothermal annealing. The duration of isothermal exposure is directly connected with the annealing temperature.…”

Section: Resultsmentioning

confidence: 99%

Formation of Eutectic Carbides in the Structure of High-Purity White Cast Iron in the Forging Process

Sukhanov¹,

Arkhangelsky²

2017

MSA

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It is found that the deformation of white cast iron under forging production is only possible with a minimum number of permanent impurities. The developed modes of high-temperature intermediate annealing facilitate the deformation of the forging under normal production conditions. It is shown that in the process of isothermal annealing of white cast iron begins the process of disintegration of ledeburite in the more stable eutectic carbides, providing technological plasticity for subsequent forging. The installed influence of the purity of white cast iron on the morphology of the excess carbides and their ability to divide. Studies the morphology of the excess eutectic carbides after melting, pre-annealing and after deformation forging. Discovered that after severe plastic deformation the structure of white cast iron becomes more stable, due to the appearance of eutectic carbides. It was determined that the deformed structure of white iron, because of its lack ledeburite component, was more identical with the structure of the alloy ledeburite steels. The data obtained can be used for making Damascus bladed weapons products, experiencing shock-variables loads.

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The morphology of the carbides in high-carbon alloys such as damascus steel

Cited by 6 publications

References 0 publications

Eutectic Carbides in Damascus steel Ledeburite Class (Wootz)

Eutectic Carbides in Damascus steel Ledeburite Class (Wootz)

Influence of the Distribution of Excess Carbide on the Properties of Genuine Damascus Steel

Formation of Eutectic Carbides in the Structure of High-Purity White Cast Iron in the Forging Process

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