Online continuously cast billet surface strengthening quenching treatment equipment system and process

A surface strengthening and continuous casting billet technology, applied in quenching devices, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of low qualification rate, increased cost, low production efficiency, etc., to improve surface quality, improve stability, and reduce costs. Effect

Pending Publication Date: 2018-12-18
SHIJIAZHUANG IRON & STEEL
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  • Abstract
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Problems solved by technology

However, when the inventors studied microalloyed steel continuous casting slabs, they found that microalloyed high-strength steel continuous casting slabs such as Nb, V, Al, Ti, etc. that have requirements for sulfur, aluminum, and nitrogen often have problems such as surface microcracks.
Such continuous casting slabs are p

Method used

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  • Online continuously cast billet surface strengthening quenching treatment equipment system and process
  • Online continuously cast billet surface strengthening quenching treatment equipment system and process
  • Online continuously cast billet surface strengthening quenching treatment equipment system and process

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[0029] Below in conjunction with the attached drawings ( Figure 1-Figure 3 ) Describe the present invention.

[0030] figure 1 It is a schematic diagram of the quenching tank structure in an online continuous casting billet surface strengthening and quenching treatment equipment system of the present invention. figure 2 Yes figure 1 Schematic diagram of the left structure of the quenching tank. image 3 It is a schematic diagram of the four-sided single-row water spray arrangement structure in the quenching tank. Such as Figure 1 to Figure 3 As shown, an online continuous casting billet surface strengthening and quenching treatment equipment system is provided with a quenching tank 1 between the continuous casting billet roller table of the continuous casting production line and the hot delivery process or the slow cooling and heat preservation process. The quenching tank includes a tank body, and an overflow tank 2 is provided along the notch of the tank body ( figure 1 The m...

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Abstract

Provided are an online continuously cast billet surface strengthening quenching treatment equipment system and process. A quenching tank is arranged between a continuously cast billet roller bed of acontinuous casting production line and a heat conveying process or slow cooling heat preservation procedure to carry out online forced cooling on a continuously cast billet, the surface of the continuously cast billet can stride across the microalloy element carbo-nitride separation critical temperature area, separation and gathering of microalloy element carbo-nitride can be avoided, and therefore the continuously cast billet surface crack happening probability is effectively reduced, and the aim of improving the surface quality of the continuously cast billet and then increasing the yield afinished rolled piece is achieved.

Description

technical field [0001] The invention relates to metallurgical continuous casting technology, in particular to an online continuous casting slab surface strengthening quenching treatment equipment system and process, by setting a quenching tank between the continuous casting slab roller table of the continuous casting production line and the hot delivery process or slow cooling and heat preservation process On-line forced cooling of the continuous casting slab can make the surface of the continuous casting slab jump over the critical temperature zone for the precipitation of carbonitrides of microalloying elements, so as to prevent the precipitation and aggregation of microalloying elements carbonitrides, thereby effectively reducing the occurrence of cracks on the surface of the continuous casting slab Probability, to achieve the goal of improving the surface quality of continuous casting slabs and thus increasing the pass rate of rolled products. Background technique [000...

Claims

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Application Information

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IPC IPC(8): C21D1/63C21D1/06C21D1/18C21D9/00B22D11/16
CPCC21D1/06C21D1/18C21D1/63C21D9/0062C21D9/0081B22D11/163
Inventor 刘剑辉张海宁范建通焉永刚张乐辰刘勇陈良勇高鹏华祺年
Owner SHIJIAZHUANG IRON & STEEL
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