Hardening and tempering treatment technology for roll

Abstract

The invention discloses a hardening and tempering treatment technology for a roll. The hardening and tempering treatment technology particularly comprises the steps that crack detection is conducted on the roll, and the qualified roll is put into a preheating pipeline for preheating treatment and preheated till the temperature reaches 80-120 DEG C; the preheated roll is put into a quenching furnace for quenching treatment, specifically, the temperature is heated to 560-640 DEG C, heat preservation is conducted for 1-2 h, the temperature is heated to 940-980 DEG C, and heat preservation is conducted for 2-4 h; the roll is taken out, and the temperature is lowered to 460-500 DEG C through air cooling and then lowered to room temperature through water cooling; the roll is put into a tempering furnace for tempering treatment, specifically, the temperature is increased to 260-300 DEG C, heat preservation is conducted for 0.5-1.5 h, the temperature is increased to 620-660 DEG C, and heat preservation is conducted for 2-3 h; finally the tempering furnace is opened, the roll is cooled to 360-400 DEG C along with the furnace and then put into a cooling water pool to be water-cooled to room temperature, and then the hardening and tempering treatment technology is completed. In this way, the hardening and tempering effect can be significantly improved, the roll achieves the higher shaping, strength and hardness properties, and the product quality is high.

Description

technical field [0001] The invention relates to a treatment process, in particular to a quenching and tempering treatment process for rolls. Background technique [0002] The roll is an important part consumed in large quantities in steel rolling production. The quality of the roll not only affects the surface quality of the rolled material, but also affects the operating rate of the rolling mill. The quality of the roll mainly depends on its own quality in the heat treatment process. The quality of quenching and tempering treatment is one of the indispensable heat treatment processes for steel rolling, and the quality of the process is very important. At present, only one quenching and one tempering are used for the quenching and tempering treatment of rolls, resulting in incomplete quenching and tempering treatment. , thereby affecting the mechanical properties of the roll. Contents of the invention [0003] The technical problem mainly solved by the present invention i...

AI Technical Summary

Problems solved by technology

[0002] The roll is an important part consumed in large quantities in steel rolling production. The quality of the roll not only affects the surface quality of the rolled material, but also affects the operating rate of the rolling mill. The quality of the roll mainly depends on its own quality in the heat treatment process. The quality of quenching and tempering treatment is one of the indispensable heat treatment processes for steel rolling, and the quality of the process is very important. At present, only one quenching and one tempering are used for the quenching and tempering treatment of rolls, resulting in incomplete quenching and tempering treatment. , thus affecting the mechanical properties of the roll