Formula and production process of low-carbon casting powder of titanium-containing stainless steel

Abstract

The invention belongs to the technical field of metallurgical auxiliary materials, and particularly relates to a formula and production process of low-carbon casting powder of titanium-containing stainless steel. The production process comprises the following steps: S1, raw material preparation: sequentially weighing the following raw materials in parts by weight: 15-19 parts of 330 carbon black, 8-12 parts of medium carbon graphite, 9-13 parts of amorphous graphite, 5-9 parts of a binder, 11-15 parts of industrial sodium carbonate, 7-11 parts of wollastonite, 15-19 parts of perovskite, 3-7 parts of blast furnace slag, 2-6 parts of fluorite, 12-16 parts of cryolite, 24-28 parts of sodium fluoride and 12-16 parts of organic water for later use; and S2, grinding treatment: performing grinding treatment on the 330 carbon black, the medium carbon graphite, the amorphous graphite, the binder, the industrial sodium carbonate, the wollastonite, the perovskite, the blast furnace slag, the fluorite, the cryolite and the sodium fluoride in the step S1. The surface of the prepared casting powder is rougher, and longitudinal cracks can be effectively prevented from appearing on the surface of a slab.

Description

Technical field [0001] The present invention relates to the technical field of metallurgical auxiliary materials, and in particular to the formula and production process of a low-carbon protective slag containing titanium stainless steel. Background technique [0002] A serious problem when producing crack-sensitive steel grades by continuous casting is the development of longitudinal cracks on the slab surface. Slow cooling of the continuous casting billet can avoid the occurrence of surface cracks on the continuous casting billet. During the continuous casting production process, the heat released during the solidification process of the liquid steel is transmitted to the outside through the slag film, which can reduce the heat transfer and reduce the risk of longitudinal cracks on the continuous casting surface. Probability of occurrence. Through heat transfer theoretical calculations and laboratory simulations, the researchers studied the impact of the crystallization t...

AI Technical Summary

Problems solved by technology

[0004] 2) The pore gap between the mold slag film and the continuous casting mold will reduce the heat conduction between the mold and the continuous casting shell;

The two most important metallurgical functions of mold slag are to lubricate the continuous casting slab and control the heat transfer of the mold. If the functions of lubrication and heat transfer control cannot be performed normally, the continuous casting slab will easily form defects such as depressions and cracks, and in severe cases, steel breakout accidents will increase chance of