Process for reducing SPCC material production risk of continuous annealing furnace

Abstract

The invention relates to the technical field of heat treatment, in particular to a process for reducing the risk of producing an SPCC material by a continuous annealing furnace, which comprises the following steps: by taking an SPCC material hot rolled steel coil as a raw material, carrying out cold rolling, recrystallization annealing and flattening to obtain a final product; after a cold-rolled steel coil is heated to 500 DEG C, recrystallization annealing is conducted in a continuous annealing furnace, and the annealing process temperature of each section in the continuous annealing furnace is as follows: the heating section 1 is 560 + / -20 DEG C, the heating section 2 is 650 + / -20 DEG C, the soaking section is 650 + / -20 DEG C, the slow cooling section outlet is 600 + / -20 DEG C, the rapid cooling section outlet is 430 + / -20 DEG C, the aging section outlet is 380 + / -30 DEG C, and the final cooling section outlet is 180 + / -20 DEG C. By adjusting hot rolling raw material selection, cold rolling compression ratio and plate temperature control of each area of the continuous annealing furnace, the risk of wrinkles in the furnace is reduced, tension, temperature and raw materials are reasonably matched to ensure smooth operation in the recrystallization annealing process, and the yield strength and tensile strength of the product are reduced.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a process for reducing the risk of producing SPCC materials in a continuous annealing furnace. Background technique [0002] SPCC was originally the name of the Japanese standard (JIS) "general-purpose cold-rolled carbon steel sheet and strip", and now many countries or enterprises directly use it to indicate the same kind of steel produced by themselves. With the improvement of the process control level of each steel mill, its excellent stamping performance and low price are very popular among users. The surface quality and performance of the cold-rolled steel strip produced by continuous annealing are better than those using the bell annealing process. However, the continuous annealing time is short, and it is difficult to ensure good stamping performance. [0003] Heat treatment after cold rolling is an important process in cold rolling production. Cold rolled sheets a...

AI Technical Summary

Problems solved by technology

[0004] The continuous annealing unit has the characteristics of high production capacity, uniform annealing, smooth product surface and good plate shape, but at the same time, due to the short annealing time, it has the disadvantage of poorer mechanical properties than the products produced by the bell annealing furnace, and the continuous annealing furnace is an open-type annealing. Under the action of high temperature tension in the annealing furnace, the steel strip is particularly affected by tension fluctuations