Anti-nodulation high-sulfur non-quenched and tempered steel smelting technology

A non-quenched and tempered steel, anti-nodulation technology, applied in the improvement of process efficiency, furnace type, furnace and other directions, can solve the problems of poor stability of the pouring curve, fluctuation of the liquid level of the mold, slag inclusion under the skin of the rolled material, etc. The effect of product scrapping, stable pouring curve and no fluctuation of liquid level
CN111663072AActive Publication Date: 2020-09-15ZENITH STEEL GROUP CORP +1
9 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZENITH STEEL GROUP CORP
Publication Date
2020-09-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of non-quenched and tempered steel smelting, particularly relates to an anti-nodulation high-sulfur non-quenched and tempered steel smelting technology, and aims to solve the problem that during the smelting process of specific steel composition, inclusion in steel finally wraps calcium sulfide in the form of high-melting-point magnesium aluminate spinel type inclusion to form composite inclusion. Control over refining slag in the key operating process is clear-cut, for example, during refining, the furnace clinker binary alkalinity (CaO / SiO2) 2.5-3.5 is controlled to improve the adsorption performance of the furnace clinker to the inclusions; through controlling the ternary alkalinity, the furnace clinker liquidity is improved, and the nodulation key factor can be ensured to be controlled during the continuous casting process through mutual collaboration. According to the anti-nodulation high-sulfur non-quenched and tempered steel smeltingtechnology, the wire feeding sequence and the time requirement after VD vacuum treatment are defined, conversion of oxide inclusion to low-melting-point inclusion is effectively controlled, at the same time, generation of plenty of high-melting-point sulfide inclusion is prevented, and finally, during the continuous casting process of molten steel, the pouring curve is steady, and the liquid surface does not fluctuate.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of non-quenched and tempered steel smelting, and in particular relates to a nodulation-preventing high-sulfur non-quenched and tempered steel smelting process. Background technique

[0002] Non-quenched and tempered steel is a green and energy-saving steel developed in the 1970s with the international energy shortage. Non-quenched and tempered steel eliminates the quenching and high-temperature tempering processes, which simplifies the production process and reduces energy consumption. It is widely used in auto parts. Among them, the high-sulfur non-quenched and tempered steel is an important variety of S-containing and Al-containing free-cutting non-quenched and tempered steel. Since the non-quenched and tempered steel contains high sulfur and aluminum, it is easy to generate high melting point composite inclusions during the casting process, that is, in The inclusions accumulated on the inner wall of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More