Planning regimes of induction hardening of cold-rolling rolls

Veksler, E. M.; Adamova, N. A.

doi:10.1007/bf00776441

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under high pressures during rolling, there is a risk of transformation of residual austenite and the subsequent formation of cracks, which can lead to the breakage of the roll. A subzero treatment is applied to the induction hardened layer to minimize retained austenite by putting it in liquid nitrogen [10][11][12]. The improvements after deep cryogenic treatment can be attributed to the transformation of retained austenite to martensite and further to increases in uniform and homogeneous carbide distribution with secondary carbide precipitation in the case of steels with secondary tempering peaks [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of feed rate during induction hardening on the hardening depth, microstructure, and wear properties of tool-grade steel work roll

Sapek,

Kalin,

Donik

et al. 2024

Preprint

View full text Add to dashboard Cite

Rolls are the most critical yet vulnerable parts of cold rolling mills. It is crucial for them to withstand long rolling campaigns without losing surface roughness or incurring damage. The newly developed rolls are made from tool-grade steel with high roughness, lower wear, and high damage resistance. One of the most important advantages is the elimination of the need for chrome plating, which is currently widely used on standard steel rolls but is ecologically harmful. We investigated type of steel with 8% Cr for use in cold rolling using LOM, XRD, SEM, electron backscatter diffraction (EBSD), hardness measurements, and tribological tests. In this study, a roll with a diameter of 325 mm was ESR remelted and forged, machined to a diameter of 305 mm, and quenched and tempered to simulate industrial roll production. A forged roll was induction heated and hardened at four different feed rates (i.e., 24 mm/min, 30 mm/min, 36 mm/min, and 42 mm/min), tempered at 515°C for 24 hours and again at 480°C for 24 hours, and dissected for in-depth analysis. We identified a clear relationship between the feed rate of the roll during induction hardening and the depth of hardness, the sizes of carbides, and the wear properties of the roll. By reducing the feed rate of the roll through the inductor, we increased the depth of the hardened layer from 16 mm (at a feed rate of 36 mm/min) to 25 mm (at a feed rate of 24 mm/min), which is a 56.25% increase expected to extend the lifespan of the working roll without having negative effects on the wear resistance and other important parameters. XRD analysis showed that the sample had a 0.4% residual austenite, which means it had a significantly lower risk of roll damage during operation than standard steel grades.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of feed rate during induction hardening on the hardening depth, microstructure, and wear properties of tool-grade steel work roll

Sapek,

Kalin,

Donik

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Cooling Capacity of Jet Spraying Devices for Large Steel Parts Heat Treatment

Майсурадзе

Yudin

Рыжков

2017

Advanced Methods and Technologies in Metallurgy in Russia

View full text Add to dashboard Cite

Investigation and Development of Spray Cooling Device for Heat Treatment of Large Steel Forgings

Майсурадзе

Yudin

Рыжков

2014

Materials Performance and Characterization

View full text Add to dashboard Cite

Methods for determining the main service characteristics of cooling devices (irrigation density, its distribution on the cooling surface, and dependence of the heat-transfer coefficient versus temperature) are described. An investigation of technological and design parameters of spraying jets and their effect on cooling capability of large steel forgings (e.g., hot-rolling mill rolls) are presented. The technological parameters under consideration are water pressure in spraying jets and the number of spraying jets in a cooling device. The varied design parameters of spraying jets are the diameters of the channels in spraying jets, the distance between the jets, and the distance from the cooling surface. The results of the experiments were applied to obtain the dependency between technological and design parameters versus main service characteristics of spraying jets to develop and optimize the technology of heat treatment of large steel forgings. These relations were applied for modeling spray cooling of hot-rolling mill rolls.

show abstract

Planning regimes of induction hardening of cold-rolling rolls

Cited by 3 publications

References 0 publications

Effect of feed rate during induction hardening on the hardening depth, microstructure, and wear properties of tool-grade steel work roll

Effect of feed rate during induction hardening on the hardening depth, microstructure, and wear properties of tool-grade steel work roll

Cooling Capacity of Jet Spraying Devices for Large Steel Parts Heat Treatment

Investigation and Development of Spray Cooling Device for Heat Treatment of Large Steel Forgings

Contact Info

Product

Resources

About