Enclosed Type

Leveling machine roller materials and the importance of heat treatment process

by：Transon 2020-10-29

Leveling machine roller materials and improper heat treatment technology, caused the roller wear soon, cause a leveling machine can't use, so we must attach importance to the roller material and machining process. Bearing steel GCr15 can withstand the pressure and concentration of periodical alternating load, greatly due to the rotation and sliding friction conditions, has high and even hardness and wear resistance, high elastic limit and contact fatigue strength and sufficient toughness, has certain corrosion resistance, and thus are often used to make the material of roller. A typical process is as follows: forging - — The isothermal annealing ( Spheroidizing) — — Coarse car - — Quenched and tempered - — Fine car - — Intermediate frequency quenching ( The depth of hardening layer 4 ~ 5 mm) — — Coarse grinding) — — Aging treatment ( Stress relief) — — Fine grinding. After this process, the roller leveling machine has high strength, the surface hardness of HRC61 - 63, using the intermediate frequency quenching, the hard layer to 4 ~ 5 mm, than high frequency quenching depth, for the roller rolling wool polishing after continue to use. After aging treatment, eliminate the internal stress, make the roll shaft is not easy to deformation. This article reprinted from laser cutting machine

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