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High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof

A horizontal continuous casting, ultra-low carbon technology, applied in the direction of manufacturing tools, welding equipment, welding media, etc.

Active Publication Date: 2013-01-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention proposes to use the horizontal continuous casting, rolling and continuous drawing process to manufacture the welding wire material designed by the present invention. Since the welding wire material alloy type and high content of the welding wire material designed by the present invention are many, the technology and process of producing alloy billets by horizontal continuous casting are strictly required. , the current state of the art is difficult to achieve

Method used

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  • High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof
  • High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof
  • High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 In conjunction with accompanying drawing, the manufacturing method of high-silicon ultra-low carbon stainless steel welding wire of the present invention, the steps are as follows:

[0050] (1) According to the designed welding wire composition and batching, the molten steel is smelted in a vacuum electric furnace to desulfurize, dephosphorize and remove harmful impurities, so that C<0.3%, and the tapping temperature T≥1680°C.

[0051] The chemical composition of the designed welding wire is shown in Table 3.

[0052] table 3

[0053]

[0054] (2) Use AOD at 1680°C for out-of-furnace refining, purify molten steel, use vacuum oxygen blowing technology to decarburize, reach C<0.01%, and perform tundish casting at 1590°C.

[0055] (3) The horizontal continuous casting technology is adopted to further refine the molten steel in the tundish, and the electromagnetically driven centrifugal flow tundish is used to purify the molten steel, eliminate pores, and ...

Embodiment 2

[0061] Embodiment 2 In conjunction with accompanying drawing, the manufacturing method of high-silicon ultra-low carbon stainless steel welding wire of the present invention, the steps are as follows:

[0062] (1) According to the designed welding wire composition and batching, the molten steel is smelted in a vacuum electric furnace to desulfurize, dephosphorize and remove harmful impurities, so that C<0.3%, and the tapping temperature T≥1680°C.

[0063] The chemical composition of the designed welding wire is shown in Table 5.

[0064] table 5

[0065]

[0066] (2) Use AOD at 1700°C for out-of-furnace refining, purify molten steel, use vacuum oxygen blowing technology to decarburize, reach C<0.01%, and perform tundish casting at 1600°C.

[0067] (3) The horizontal continuous casting technology is adopted to further refine the molten steel in the tundish, and the electromagnetically driven centrifugal flow tundish is used to purify the molten steel, eliminate pores, and ...

Embodiment 3

[0073] Embodiment 3 In conjunction with accompanying drawing, the manufacturing method of high-silicon ultra-low carbon stainless steel welding wire of the present invention, the steps are as follows:

[0074] (1) According to the designed welding wire composition and batching, the molten steel is smelted in a vacuum electric furnace to desulfurize, dephosphorize and remove harmful impurities, so that C<0.3%, and the tapping temperature T≥1680°C.

[0075] The chemical composition of the designed welding wire is shown in Table 7.

[0076] Table 7

[0077]

[0078] (2) Use AOD at 1690°C for out-of-furnace refining, purify molten steel, use vacuum oxygen blowing technology to decarburize, achieve C<0.01%, and perform tundish casting at 1595°C.

[0079] (3) The horizontal continuous casting technology is adopted to further refine the molten steel in the tundish, and the electromagnetically driven centrifugal flow tundish is used to purify the molten steel, eliminate pores, and...

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Abstract

The invention discloses a high-silicon extra-low-carbon stainless steel soldering wire and a horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof. The manufacturing method comprises the following steps of: carrying out the treatments of desulfurization, dephosphorization and harmful impurity removal on molten steel by using vacuum electric furnace smelting according to the designed soldering wire ingredients, wherein the designed soldering wire ingredients are as follows: 0.005-0.015 of C; 0.3-1.2 of Si; 0.45-1.20 of Mn; not more than 0.02 of P; not more than 0.020 of S; 18.50-19.50 of Cr; 11.50-13.50 of Ni; less than 0.045 of N; less than 0.40 of Cu; 0.1-0.2 of Nb; 0.03-0.06 of RE; and the balance of Fe and unavoidable impurities; externally refining by AOD (Argon Oxygen Decarburization) and carrying out tundish casting; further refining the tundish molten steel by a horizontal continuous-casting technology in a blank-casting crystallizer at 1320-1330 DEG C; carrying out the tandem-rolling, and secondly rolling the cooled horizontal continuous-casting steel blanks at 960 DEG C; carrying out the continuous-drawing, carrying out the treatment of protective atmosphere annealing at 950-980 DEG C to obtain the finished-product soldering wires. The invention has high content of silicon, remarkably improves the resistance of the stainless steel on high temperature, and corrosion of high-concentration nitric acid and sulfuric acid.

Description

technical field [0001] The invention belongs to the high-silicon and ultra-low-carbon austenitic stainless steel welding wire with strong acid corrosion resistance and its manufacturing technology in the field of chemical industry, in particular to a high-silicon and ultra-low-carbon stainless steel welding wire and its horizontal continuous casting, rolling and drawing manufacturing method. Background technique [0002] Austenitic stainless steel is non-magnetic and has high toughness and plasticity, strong corrosion resistance, good weldability and good durability. However, in the austenitic stainless steel welded structure in service, there are problems such as cracks and corrosion damage in the welded joints, which affect the normal use and safety of the structure and cause economic losses. In the welding process of austenitic stainless steel, the main problems are the intergranular corrosion of welded joints, stress corrosion cracks, hot cracks of welded joints and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
Inventor 李永胜陈光
Owner NANJING UNIV OF SCI & TECH
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