Production process for high-performance steel plate thermal treatment unit

Abstract

The invention relates to the technical field of high-performance steel plate thermal treatment, in particular to a production process for a high-performance steel plate thermal treatment unit. The process comprises the following steps of: carry out the following controls after hot-rolling steel coils are transported into a rolling cylinder of an uncoiler through a coil car and then fed into a pinch roll: regulating a deep bending roll to enter a preset position and straightening in a No.1 straightener after passing through a No.1 side guide device; cutting off the head waste materials of the straightened steel plates in the cutting position of an opening, and carrying out the centring welding and the manual welding in the position of a welding platform; feeding the welded steel plates into an entrance loop; pulling the steel plates out from the loop and transferring to a process section; then sequentially carrying out the thermal treatments of induction heating, quenching, tempering, and the like so as to reach mechanical performances required for the steel plates; then carrying out straightening and slitting; carrying out the multiple feet cutting on the steel plates by a pair of plasma scissors; and transferring the cut steel plates to a finished product storage. The invention can ensure that the yield strength of the steel plates produced by adopting the process can reach above 1000MPa; and the steel plates can reach the performance requirements on high strength, high toughness and cold bending.

Description

technical field [0001] The invention relates to the technical field of high-performance steel plate heat treatment, in particular to a production process of a high-performance steel plate heat treatment unit. Background technique [0002] The construction machinery manufacturing industry is the main sales target of high-strength steel plates. In order to improve work efficiency and service life [0003] With the development of domestic and foreign construction machinery in the direction of high parameters and large scale, the amount of high-strength steel plates (above 590MPa grade) has accounted for 20% to 30% of the total amount of steel used in machinery. For example, Zoomlion, a construction machinery manufacturing company, mainly produces concrete mixer trucks, high-altitude conveying pump trucks, road construction machinery, and hoisting machinery. The annual demand for steel is about 50,000 tons, mainly high-strength steel and low-alloy steel. Among them, more than ...

AI Technical Summary

Problems solved by technology

However, the yield strength is greater than 800MPa, and it is generally not possible to produce coils due to the capacity of the coiler and the difficulty of unflattening and straightening the coils when they are rolled directly into coils by hot continuous rolling.

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