Seamless solid metal calcium cored wire for steelmaking and deoxidation and preparation method thereof

A technology of calcium metal and cored wire, which is applied in the field of seamless solid calcium metal cored wire and its preparation, can solve problems such as insufficient depth and boiling of molten steel, reduce process temperature drop, increase steel strip thickness, and reduce boiling The effect of the phenomenon

Inactive Publication Date: 2012-07-11
周海涛 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the depth of insertion of the existing calcium cored wire into the molten steel is insufficient and easily causes the molten steel to boil, the present invention provides a seamless solid metal calcium cored wire for steelmaking deoxidation that can make the calcium treatment of molten steel efficient and stable. Wire and its preparation method

Method used

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  • Seamless solid metal calcium cored wire for steelmaking and deoxidation and preparation method thereof
  • Seamless solid metal calcium cored wire for steelmaking and deoxidation and preparation method thereof
  • Seamless solid metal calcium cored wire for steelmaking and deoxidation and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Step 1. Use the solid metal calcium wire with the sum of impurities not higher than 3% as the inner core 1, and prepare the calcium wire preparation method with reference to the application number 201010292333.8, but use industrially pure calcium ingots with the sum of impurities not higher than 3% as the raw material Then adopt the plasma spraying method to spray, coat one deck nano-scale silicon powder (particle diameter at 40nm) on the surface of the solid metal calcium wire as the intermediate layer 2,

[0025] Step 2. Send the solid metal calcium wire coated with nano-scale silicon powder and the steel strip into the argon arc welding unit at the same time, and after compression, welding and drawing, the steel strip is made into a seamless steel pipe as the outer layer 3 and covered Outside solid calcium metal wires coated with nanoscale silicon powder.

[0026] The diameter of the solid calcium metal wire described in step 1 is 8.3 mm, and the thickness of the nan...

Embodiment 2

[0029] All the other steps are the same as in Example 1, except that the diameter of the solid calcium metal wire described in step 1 is 6.5mm, and the thickness of the nanoscale silicon powder (particle diameter at 30nm) as the middle layer 2 is 0.01mm. The steel strip described in step 2 is 08A steel strip or 08D steel strip or carbon steel strip, and the thickness of the steel strip is 0.8mm.

Embodiment 3

[0031] All the other steps are the same as in Example 1, except that the diameter of the solid calcium metal wire described in step 1 is 10mm, and the thickness of the nanoscale silicon powder (particle diameter at 50nm) as the intermediate layer 2 is 0.3mm. The steel strip described in step 2 is 08A steel strip or 08D steel strip or carbon steel strip, and the thickness of the steel strip is 1.5mm.

[0032] The specification parameters of the cored wire of the present invention are as follows:

[0033] 1. Core-spun wire diameter: 7.31-11.8mm

[0034] 2. Core-spun wire composition (mass%): steel pipe 82-70, solid metal calcium wire 18-30

[0035] 3. Chemical composition of solid calcium metal wire (%)

[0036] Ca

Fe Ni Mn Cu Mg Al Si N

≥97

≤3

98.59

0.01 0.005 0.03 0.003 0.8 0.5 0.01 0.05

[0037]Feeding method: feed the seamless solid calcium cored wire prepared in Example 1 at the end of the electric furnace treatment, stee...

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Abstract

The invention discloses a seamless solid metal calcium cored wire for steelmaking and deoxidation and a preparation method thereof. The seamless solid metal calcium cored wire consists of an outer-layer steel tube, a middle coating layer and an inner core, wherein the inner core is a solid metal calcium (pure calcium) wire. The seamless solid metal calcium cored wire disclosed by the utility model has the beneficial effects that vapor pressure and the gasification rate of metal calcium can be reduced, the depth of the seamless solid metal calcium cored wire inserted in molten steel is increased, the boiling of the molten steel is reduced, the time that the metal calcium is adsorbed by metal is reduced, the boiling phenomenon of the existing seamed solid calcium cored wire inserted in the molten steel is overcome, the phenomenon that the wire feeding is affected due to hollow powder calcium cored wire and non-uniform core powder weigh is reduced, and the bring-in of harmful elements (S, P, C and Si) in the powder calcium cored wire is avoided, so that the yield and the stability of metal calcium are greatly improved.

Description

technical field [0001] The invention relates to a seamless solid metal calcium cored wire for steelmaking deoxidation and a preparation method thereof. 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 molten steel and react ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 周海涛周啸
Owner 周海涛
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