A kind of roll induction hardening process

Abstract

The invention discloses a roll induction quenching process method. The roll induction quenching process method comprises the following steps that (1) a roll to be quenched is preheated, the preheating temperature is 220-250 DEG C, and the preheating holding time is 6-12 h; (2) the preheated roll to be quenched is hoisted into a quenching inductor and clamped in place, so that the two axial ends of the roll to be quenched extend out of the quenching inductor by 25-40 mm respectively; (3) a roll rotary mechanism is started and is powered on to be heated, and the temperature of a roll body is rapidly increased to 900-960 DEG C and is preserved; and (4) the roll obtained after heating and temperature preservation is rapidly hoisted into a spray quenching tank, the roll body is subjected to spray quenching and cooling, and then the induction quenching process is completed. The whole induction quenching is conducted on the roll body by setting the corresponding parameters, the purpose of controlling the depth of a quench-hardened layer of the roll is achieved, and as the quenching process parameters are reduced, the process operability of quenching and the product quality are improved.

Description

technical field [0001] The invention relates to the field of material heat treatment technology, in particular to a roll induction quenching technology method used for induction heat treatment of medium and small cold rolls. Background technique [0002] Cold roll is one of the tools for rolling a certain thickness of hot-rolled steel sheet to a certain thickness at normal temperature. With the advancement of society, the improvement of people's living standards and the advancement of rolling technology, the thickness of cold-rolled steel sheets is getting thinner and thinner. In the field of rolling some hard-to-deform metal materials and narrow strip steel, the installed capacity of small and medium-sized cold rolling mills is large, and the consumption of corresponding cold rolling rolls is also relatively large. At present, progressive induction quenching is generally used for cold rolls. In this quenching method, to obtain a certain hardened layer depth, two main param...

AI Technical Summary

Problems solved by technology

At present, cold rolling rolls generally adopt progressive induction quenching. In this quenching method, two main parameters, quenching temperature and quenching speed, need to be controlled to obtain a certain depth of hardened layer, and the width of the soft strip at both ends of the roll is not easy to control, which affects product quality