Heat treatment of two-layer alloyed-iron rollers

Скобло, Т. С.; Klochko, O. Yu.; Sidashenko, A. I.; Sokolov, R. G.

doi:10.3103/s096709121309012x

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…Використання методу відцентрового лиття при формуванні робочого шару для зносостійких біметалічних виливків з міцною серцевиною і шийками для прокатних валків, дозволило істотно розширити область застосування менш технологічних за виготовленням високолегованих чавунів [1]. Експлуатаційна стійкість таких виробів визначається рівнем однорідності фізико-механічних властивостей, що залежать від сукупності ряду факторів, таких як хімічний склад сплаву, технологічні параметри виробництва тощо [2,3]. Механічні властивостіграницю міцності на розрив і твердість, відносять до основних критеріїв якості одержуваних виробів та регулюються стандартами та чинною нормативно-технічною документацією.…”

Section: Influence Of Hardness On Variability Of Structural State Par...unclassified

Дослідження Закономірності Впливу Твердості На Мінливість Параметрів Структурного Стану У Високолегованому Чавуні

Клочко¹,

Білінська²,

Воронов³

2022

НТС

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Section: Influence Of Hardness On Variability Of Structural State Par...unclassified

Дослідження Закономірності Впливу Твердості На Мінливість Параметрів Структурного Стану У Високолегованому Чавуні

Клочко¹,

Білінська²,

Воронов³

2022

НТС

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“…S1, дополнительный материал). Приведены только выявленные интервалы условных цветов, соответствующие фазам в отливках, с номерами 1, 5, 6, 10, 11, 15 и 16 [4].…”

Section: результаты и обсуждениеunclassified

Structure formation of high-chromium cast irons in the temperature range of the magnetic transformation of carbide phases

et al. 2020

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A new comprehensive approach has been developed to characterize the structure formation of high-chromium cast iron in the working layers of mill rolls (10 -12 tons weight) within the hot finishers. Application of our approach makes it possible to estimate the phase composition of the alloy. Such heterogeneous material is characterized by insufficient stability of properties and the absence of reliable methods for assessing structure formation. The structural features of massive castings (up to 20 tons) are revealed in the process of crystallization and operation under the temperatures of magnetic transformation of the carbide phases (magnetostriction phenomenon). The conducted studies introduce a new understanding of the phase composition of high chromium cast iron, the phase composition variability at magnetic transformation of carbide phases and decomposition of retained austenite. The variability of phases and their interconnection during casting and heat treatment are estimated. It has been shown that photographs of metallographic images do not allow one to reliably estimate the alloy phase composition, since the primary image pattern after crystallization preserves, while a partial phase decomposition with the formation of their various combinations takes place. The possibility of accurate qualitative and quantitative identification of the formed phases in the cast and heat-treated state in a multiphase heterogeneous alloy (high-chromium cast iron of large masses) is shown. A new approach to the characterization of structure formation in a multiphase alloy with the opticalmathematical method for the description of metallographic images is proposed. We show that the insufficient stability of the phase composition while casting under magnetostriction temperatures and with the proposed effective heat treatment method used is determined by the variability of structure formation with the buildup of certain bonds between the phases and decomposition of residual austenite.

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“…For this purpose, indicators are used to describe local differential relations between the conditional colors estimated according to the finite difference indices. Such indicators are calculated on the basis of the Navier-Stokes differential equations, presented in the work in the form of changing functions of flow and vortex in finite-difference form [9][10][11]. They are also used to obtain histograms of the integral distribution of the corresponding structures in each image fragment, corresponding to qualitative indicators (characteristics) of the structure evaluation.…”

Section: Fig 2 -General View Of the Krm-c-k2m Magnetic Analyzer Withmentioning

confidence: 99%

On Efficient Use of Modifying Additives in Restoration of Agricultural Machinery

2019

IJRTE

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 Abstract-Statistical analysis of gray iron parts quality of agricultural machinery, according to which the Hc measurements were made, has revealed that the level of this characteristic on the surface has different indicators. They vary from 4,3 to 8,0 A/cm, and on the inside -they reach 5,0 -9,4 A/cm, which indicates the formation of defects more often in this area. Zones with impaired metal quality (cracks, pores, local stresses, structural deviations of the liquidation phenomena with the formation of non-metallic inclusions) were established by metallographic and micro-X-ray spectral studies, where the Hs indexes increased and reached 7,8-11,3 A/cm. A new approach, assessing a structure formation at the restoration of body parts from gray iron has been developed, based on detection of defects and structure in them by a non-destructive method according to the Hs indices and an optical-mathematical method. Recovery of defects by melting, using a detonation charge from the disposal of ammunition has confirmed the effectiveness of such a modifying impurity when dosing it into a liquid solution of gray iron.Using technology of casting defects welding in the cases of the distribution box at JSC "HTZ" in restoration of 348 pcs makes 746999 UAH per year.

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Heat treatment of two-layer alloyed-iron rollers

Cited by 8 publications

References 1 publication

Дослідження Закономірності Впливу Твердості На Мінливість Параметрів Структурного Стану У Високолегованому Чавуні

Дослідження Закономірності Впливу Твердості На Мінливість Параметрів Структурного Стану У Високолегованому Чавуні

Structure formation of high-chromium cast irons in the temperature range of the magnetic transformation of carbide phases

On Efficient Use of Modifying Additives in Restoration of Agricultural Machinery

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