Solid calcium metal cored wire for deoxidation in steel making

A technology of metal calcium and cored wire, applied in the field of metallurgy, can solve the problems of not very ideal, waste of metal calcium, affecting the performance of steel, etc., and achieve the effects of increasing the absorption time, reducing the temperature drop in the process, and reducing the gasification speed.

Inactive Publication Date: 2010-12-22
周海涛 +1
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  • Abstract
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Problems solved by technology

[0003] The above two cored wires can already meet the technical requirements of refining some steel types, but relatively speaking, they are not very satisfactory. This is because the phenomenon of silicon increase in molten steel will occur when Ca-Si wire is fed, and the increase in silicon content will also affect the steel. final properties of steel
When Ca-Fe cored wire is used, the aforementioned silicon increase phenomenon will not occur, but after the Fe-Ca powder packaged inside the cored wire enters the molten steel, the cored wi...

Method used

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  • Solid calcium metal cored wire for deoxidation in steel making
  • Solid calcium metal cored wire for deoxidation in steel making
  • Solid calcium metal cored wire for deoxidation in steel making

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Embodiment 1

[0031] The solid metal calcium cored wire used for steelmaking deoxidation of the present invention is composed of an outer layer 3 wrapping an intermediate layer 2, and the intermediate layer 2 wrapping an inner core 1, and the inner core 1 is composed of the sum of the weight of impurities not higher than 0.1wt %, the density is 1.51-1.54g / cm 3 The solid metal calcium wire; the middle layer 2 is machine oil or rapeseed oil; the outer layer 3 is A3 steel or Q195 steel. The thickness of the A3 steel or Q195 steel is 0.56mm. The diameter of the inner core is 7.5-8mm.

[0032] The present invention prepares the extrusion equipment that the inner core of solid metal calcium wire adopts such as image 3 shown. Its workflow for preparing solid calcium metal wires, such as Figure 4 shown. Mainly, the calcium ingot is first heated to 400°C in a gas-protected furnace, and then placed in a primary extruder to extrude by applying pressure through the extrusion rod, and then cooled...

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Abstract

The invention relates to a solid calcium metal cored wire for deoxidation in steel making, which comprises an outer steel shell, a middle protective layer and an inner core, wherein the inner core is a solid calcium metal wire. The provided solid calcium metal cored wire can reduce the gasification speed of calcium metal, increase the time for absorbing the calcium metal by molten steel, overcome the phenomenon of affecting wire feeding due to hollowness or uneven core powder weight existing in a powdery calcium metal cored wire, and avoid bringing in harmful elements (S, P, C and Si) in the powdery calcium metal cored wire, thereby greatly enhancing the yield of the calcium metal.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a solid metal calcium cored wire for refining molten steel outside a furnace. Background technique [0002] In the iron and steel smelting process, the refining process outside the furnace has been widely used. The refining process outside the furnace can further desulfurize, deoxidize and denature the inclusions to produce higher-quality ordinary steel and alloy steel to meet the needs of industrial and agricultural development and construction. Calcium treatment of molten steel is an out-of-furnace refining technology that adds metal calcium or alloys to the deep part of molten steel by spray metallurgy or wire feeding to achieve metallurgical effects such as deoxidation, desulfurization, and denaturation of non-metallic inclusions. Since metal calcium has a low melting point (843°C) and a low boiling point (1450°C), it is very easy to float up to the surface of steel slag in ...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 周海涛周啸
Owner 周海涛
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