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Welding rod steel and manufacturing process thereof

A manufacturing process and welding rod steel technology, applied in the field of welding rod steel and its manufacturing process, can solve the problems that affect the smooth production, defects in welding performance and drawing performance, easy to cause nodules, etc., so as to ensure smooth production and good drawing Pulling performance and welding performance, the effect of preventing nozzle nodulation

Inactive Publication Date: 2017-11-24
SHOUGANG SHUICHENG IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding rod steel produced by the existing technology often has defects in welding performance and drawing performance, and it is easy to cause problems such as nodules in the continuous casting process, which seriously affects the smooth production

Method used

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  • Welding rod steel and manufacturing process thereof
  • Welding rod steel and manufacturing process thereof
  • Welding rod steel and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This embodiment provides a manufacturing process of welding rod steel, which includes the following steps.

[0072] S1, smelting steps

[0073] Using molten iron as raw material, the composition of molten iron is Si: 0.20wt%, Mn: 0.20wt%, P≤0.120wt%, S≤0.025wt%, Cr≤0.10wt%, Ni≤0.10wt%, Cu≤0.15wt% , As≤0.015wt%. The temperature of molten iron is 1200°C. According to the loading capacity of 97.5t, it enters the 100t converter for smelting. Add slag material in batches to make slag.

[0074] The deoxidation alloying operation is carried out during the tapping process, and the tapping time is 3.5 minutes. The tapping adopts double slag blocking, and the thickness of the ladle slag layer is 40mm. The tapping temperature is 1600°C. After the deoxidation alloying operation, that is, before entering the refining step, the composition of molten steel is controlled to

[0075]

[0076] S2, refining step

[0077] The molten steel obtained in the smelting step is first bl...

Embodiment 2

[0089] This embodiment provides a manufacturing process of welding rod steel, which includes the following steps.

[0090] S1, smelting steps

[0091] Using molten iron and some scrap steel as raw materials, the composition of molten iron is Si: 0.60wt%, Mn: 0.50wt%, P≤0.120wt%, S≤0.025wt%, Cr≤0.10wt%, Ni≤0.10wt%, Cu≤ 0.15wt%, As≤0.015wt%. The temperature of molten iron is 1200°C. According to the loading capacity of 98.5t, it enters the 100t converter for smelting. Add slag material in batches to make slag.

[0092] The deoxidation alloying operation is carried out during the tapping process, and the tapping time is 3.5 minutes. The tapping adopts double slag blocking, and the thickness of the ladle slag layer is 50 mm. This embodiment is the first ladle of molten steel, so the tapping temperature is 1630°C. After the deoxidation alloying operation, that is, before entering the refining step, the composition of molten steel is controlled to

[0093]

[0094] S2, refi...

Embodiment 3

[0107] This embodiment provides a manufacturing process of welding rod steel, which includes the following steps.

[0108] S1, smelting steps

[0109]Using molten iron and some scrap steel as raw materials, the composition of molten iron is Si: 0.80wt%, Mn: 0.80wt%, P≤0.120wt%, S≤0.025wt%, Cr≤0.10wt%, Ni≤0.10wt%, Cu≤ 0.15wt%, As≤0.015wt%. The temperature of molten iron is 1200°C. According to the loading capacity of 99.5t, it enters the 100t converter for smelting. Add slag material in batches to make slag.

[0110] The deoxidation alloying operation is carried out during the tapping process, and the tapping time is 3.5 minutes. The tapping adopts double slag blocking, and the thickness of the ladle slag layer is 50 mm. The tapping temperature is 1620°C. After the deoxidation alloying operation, that is, before entering the refining step, the composition of molten steel is controlled to

[0111]

[0112] S2, refining step

[0113] The molten steel obtained in the sme...

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Abstract

The invention relates to the field of metallurgy, and discloses a welding rod steel and a manufacturing process thereof. The manufacturing process of the welding rod steel comprises the smelting step, the refining step and the casting step. Refined molten steel comprises 0.06-0.08wt% of C, less than or equal to 0.03wt% of Si, 0.37-0.50wt% of Mn, less than or equal to 0.025wt% of P, less than or equal to 0.025wt% of S, 30-50ppm of [O], and the balance impurities and Fe. The casting step is used for casting the molten steel obtained in the refining step by adopting a continuous casting process, and the superheat degree of the molten steel is 30-50 DEG C. The welding rod steel manufactured by the process can have good welding performance and drawing performance and meet follow-up use and machining requirements. According to the production process, the production smoothness can be well guaranteed, and the phenomenon of nodulation of the continuous casting is not prone to be generated.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a welding rod steel and a manufacturing process thereof. Background technique [0002] As a special steel, welding rod steel has high requirements on its welding performance and drawing performance. The welding rod steel produced by the prior art often has defects in welding performance and drawing performance, and it is easy to cause problems such as nodules in the continuous casting process, which seriously affects the smooth production. Contents of the invention [0003] The purpose of the present invention is to provide a manufacturing process of electrode steel, which can produce electrode steel with better drawing performance and welding performance, and the nozzle is not easy to form nodules during continuous casting. [0004] Another object of the present invention is to provide an electrode steel, which is produced through the above-mentioned manufacturing process of the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C21C7/06B22D11/18
CPCC22C38/04B22D11/18C21C7/06C22C38/02
Inventor 龙国荣刘立德李燚张毅袁传信陈景玉李正嵩高长益李鸿荣叶雅妮江金东万国雄张东升陈海英丁云江刘燕萍
Owner SHOUGANG SHUICHENG IRON & STEEL GRP
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