Metal calcium core composite cored wire and preparation method thereof

A technology of metal calcium and cored wire, applied in the field of calcium-containing cored wire and its preparation, can solve the problems of difficulty in implementation, heavy workload, complicated process, and low calcium yield

Inactive Publication Date: 2012-07-18
上海马腾新型材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages: 1. The process of coating metal calcium on the steel strip side is complicated, because the calcium treatment process requires that the coating layer needs to be very thick, and the thickness needs to be accurately controlled. The implementation is difficult and the workload is large

Method used

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  • Metal calcium core composite cored wire and preparation method thereof
  • Metal calcium core composite cored wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The cored wire is composed of an outer sheath 2 and an inner layer core material, the outer sheath 2 is a SPCC cold-rolled steel strip with a thickness of 0.46mm, and the inner layer core material is composed of a metal calcium wire 1 with a diameter of 5.8mm and a ferrosilicon alloy powder 3. The calcium metal wire is wrapped in the ferrosilicon alloy powder, and the particle diameter of the ferrosilicon alloy powder is 0.1-0.5mm. The relevant specifications and parameters of solid calcium metal composite cored wire are as follows:

[0063] Outer diameter of cored wire: 10±0.5mm

[0064] Strip thickness: 0.46mm

[0065] Metal calcium wire diameter: 5.8mm

[0066] Weight per meter of ferrosilicon powder: 85 grams

[0067] Weight per roll: 2.3 tons

[0068] Feeding method: feeding at the end of RH refining, the steel type is AH36

[0069] Feeding speed: 180 m / min

[0070] Feeding amount: 350m / furnace

[0071] Results: The average yield of calcium metal was 32.3%, ...

Embodiment 2

[0073] The cored wire is composed of outer sheath and inner layer core material, the outer sheath is 08A1 cold-rolled steel strip with a thickness of 0.42mm, the inner layer core material is composed of metal calcium wire with a diameter of 6.0mm and metal aluminum powder, and the metal aluminum powder The particle diameter is 0.2-1.0mm. The relevant specifications and parameters of solid calcium metal composite cored wire are as follows:

[0074] Outer diameter of cored wire: 13±0.5mm

[0075] Strip thickness: 0.42mm

[0076] Metal calcium wire diameter: 6.0mm

[0077] Aluminum powder weight per meter: 110 g / m

[0078] Weight per roll: 2.4 tons

[0079] Feeding method: feeding at the end of RH refining, the steel type is B480

[0080] Feeding speed: 160 m / min

[0081] Feeding amount: 320m / furnace

[0082] Results: The average yield of calcium metal is 30.4%, which is higher than the average yield of 19.4% for solid metal calcium cored wire, and the increase of N in mol...

Embodiment 3

[0084] The cored wire is composed of outer sheath and inner core material, the outer sheath is SPCC cold-rolled steel strip with a thickness of 0.5mm, the inner core material is composed of metal calcium wire with a diameter of 5.0mm and metal iron powder, and the metal iron powder The particle diameter is 0.3-1.0mm. The relevant specifications and parameters of solid calcium metal composite cored wire are as follows:

[0085] Outer diameter of cored wire: 10±0.5mm

[0086] Strip thickness: 0.5mm

[0087] Metal calcium wire diameter: 5.0mm

[0088] Iron powder weight per meter: 115 grams

[0089] Weight per roll: 2.3 tons

[0090] Feeding method: feeding at the end of LF refining furnace

[0091] Feeding speed: 180 m / min

[0092] Feeding amount: 380m / furnace

[0093] Results: The average yield of calcium metal is 29.4%, which is higher than the average yield of 21.8% of solid metal calcium cored wire, and the increase of N in molten steel is 6.8ppm, which is far lower t...

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Abstract

The invention discloses a metal calcium core composite cored wire, which consists of an inner core material and an outer coat, wherein the inner core material is formed by compounding a solid-core calcium wire and metal particle powder. The invention also provides a method for manufacturing the cored wire. The method comprises the following steps of: (1) processing metal calcium into a metal calcium wire; (2) preparing metal into the metal particle powder or metal alloy granules; (3) tightly wrapping the metal calcium wire and the metal particle powder by using strip steel on a cored wire machine to obtain the wire, wherein the metal calcium core is wrapped in the metal particle powder or the metal alloy granules; and (4) coiling the wire into a roll. The metal calcium core composite cored wire has high molten steel penetrability; the metal particle powder is introduced, so that the molten steel is cooled locally, the heat resistance of the metal calcium wire is increased, the gasification of the metal calcium is reduced, and the dissolubility of the calcium in molten steel is improved; therefore, the N absorption of the molten steel is greatly reduced and the calcium yield is further improved.

Description

technical field [0001] The invention relates to the field of cored wires, in particular to a calcium-containing cored wire added during calcium treatment of molten steel and a preparation method thereof. Background technique [0002] 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 deformation of non-metallic inclusions. [0003] Due to the low melting point (838°C) and low boiling point (1450°C) of metallic calcium, the solubility in molten steel is very small (0.03% at 1600°C and the calcium vapor pressure is 0.186MPa), and the density of calcium is also very small Therefore, calcium-containing cored wires such as CaSi cored wire (the mass percentage of Ca is 28-32%), CaFe cored wire (the mass percentage of Ca is about 30%) or CaAl cored wire are generally used for molten ...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C7/06C21C7/064
Inventor 凌天鹰朱全郎陈永周施志峰
Owner 上海马腾新型材料厂
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