Large bar induction tempering technology and large bar induction tempering production line

Abstract

The invention relates to the technical field of steel bar production, in particular to a large bar induction tempering technology and a large bar induction tempering production line. The large bar induction tempering technology comprises the steps as follows: the curvature of a raw material of rolled steel bars is inspected, the raw material of the steel bars is continuously moved on a conveying roller table and conveyed to a multi-stage induction heating zone, the steel bars subjected to multi-stage induction heating are conveyed to a quenching device for quenching, the quenched steel bars are conveyed to a multi-stage tempering induction heating zone, the tempered steel bars are conveyed to a blanking cold bed for natural cooling, and the cooled steel bars are packaged and stored. The steel bars are driven by the conveying roller table to move forwards continuously, so that the steel bars are gradually heated stage by stage, the induction heating tempering quality of the steel bars is improved, bending deformation is small, the steel bars are moved slowly while being treated, the steel bars are uniformly heated and cooled and has uniform hardness, metallographic structure and mechanical performance and small scattering difference. The large bar induction tempering production line has the advantages as compared with the prior art.

Description

Technical field [0001] The present invention relates to the technical field of steel rod production, in particular to a large-bar induction quenching and tempering process and a large-bar induction quenching and tempering production line. Background technique [0002] In the current material 4141MOD-1, steel bar with diameter 61 quenching and tempering process, general manufacturers adopt flame furnace, box furnace, pit furnace as quenching and tempering process, due to the heating method of flame furnace, box furnace and pit furnace The limitations of this method cannot fully meet the performance requirements of 10.9 high-strength fasteners; this causes premature failure of parts during use and reduces the service life of high-strength fasteners. [0003] Therefore, providing a large-bar induction quenching and tempering process and a large-bar induction quenching and tempering production line with high strength of steel bars has become an important technical problem to be solved ...

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to provide a large bar induction quenching and tempering process to alleviate the technical problem of low steel bar strength in the prior art

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