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Smelting process of low-carbon high-sulfur free-cutting steel

A free-cutting steel and high-sulfur technology, applied in the field of steel processing, can solve problems such as internal cracks in the billet, reduced production efficiency, and high production costs, and achieve the effects of enhancing strength, improving quality, and reducing processing costs

Inactive Publication Date: 2021-06-15
长泰县兴宏驰工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low-carbon high-sulfur steel is crack-sensitive steel. Improper technology can easily cause defects such as internal cracks and surface depressions in the slab, and even production accidents such as steel breakouts.
[0003] Chinese patent CN102676955A prepared a high-sulfur free-cutting steel with excellent cutting performance by die-casting, and improved the surface finish of the cutting workpiece by adding 0.01 to 0.03% Te, but the production cost was high and the production efficiency was higher than that of continuous casting Greatly reduce wait deficiency

Method used

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  • Smelting process of low-carbon high-sulfur free-cutting steel
  • Smelting process of low-carbon high-sulfur free-cutting steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Smelting process of low-carbon high sulfur suspension steel, including the following steps:

[0033] (1) converter smelting treatment:

[0034] After the converter is out of the steel, stirring is carried out during this steel process, which is used to add aluminum blocks, silicon manganese, low carbon manganese iron, low carbon chrome iron, silicon alloy, thiron mine, lime;

[0035] (2) Refining:

[0036] Before the refining treatment, the steel water was first slag, and then sampled after energizing, according to the component content measured by the sampling, specifically silicon manganese, low carbon manganese, low carbon chromium, silicon Iron alloy, iron mine, phosphate, niobium titanium alloy, copper ingot;

[0037] (3) Connect casting:

[0038] In the continuous casting process, the whole process of protecting casting is used, and specialized special protective slag and special cover are used, and the overheating is controlled to 20 to 25 ° C, and electromagnetic st...

Embodiment 2

[0050] Smelting process of low-carbon high sulfur suspension steel, including the following steps:

[0051] (1) converter smelting treatment:

[0052] After the converter is out of the steel, stirring is carried out during this steel process, which is used to add aluminum blocks, silicon manganese, low carbon manganese iron, low carbon chrome iron, silicon alloy, thiron mine, lime;

[0053] (2) Refining:

[0054] Before the refining treatment, the steel water was first slag, and then sampled after energizing, according to the component content measured by the sampling, specifically silicon manganese, low carbon manganese, low carbon chromium, silicon Iron alloy, iron mine, phosphate, niobium titanium alloy, copper ingot;

[0055] (3) Connect casting:

[0056] In the continuous casting process, the whole process of protecting casting is used, and specialized special protective slag and special cover are used, and the overheating is controlled to 20 to 25 ° C, and electromagnetic st...

Embodiment 3

[0068] Smelting process of low-carbon high sulfur suspension steel, including the following steps:

[0069] (1) converter smelting treatment:

[0070] After the converter is out of the steel, stirring is carried out during this steel process, which is used to add aluminum blocks, silicon manganese, low carbon manganese iron, low carbon chrome iron, silicon alloy, thiron mine, lime;

[0071] (2) Refining:

[0072] Before the refining treatment, the steel water was first slag, and then sampled after energizing, according to the component content measured by the sampling, specifically silicon manganese, low carbon manganese, low carbon chromium, silicon Iron alloy, iron mine, phosphate, niobium titanium alloy, copper ingot;

[0073] (3) Connect casting:

[0074] In the continuous casting process, the whole process of protecting casting is used, and specialized special protective slag and special cover are used, and the overheating is controlled to 20 to 25 ° C, and electromagnetic st...

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Abstract

The invention discloses a smelting process of low-carbon high-sulfur free-cutting steel and relates to the technical field of steel processing. The smelting process comprises the following steps: (1) converter smelting treatment, (2) refining treatment, (3) continuous casting and (4) rolling cooling treatment. According to the smelting process, a method is simple, the steps are reasonably and normatively matched, industrial large-scale application and popularization are facilitated, and the prepared low-carbon high-sulfur free-cutting steel is high in comprehensive performance and has great market competitiveness and economic benefits.

Description

Technical field [0001] The present invention relates to the field of steel processing technology, and more particularly, it relates to a smelting process of low carbon high sulfur suspension steel. Background technique [0002] Easy-cutting steel has the advantages of prolonging tool life during cutting process, reducing cutting resistance, improving machining surface, easy to exclude chips, etc., in automotive and machining industries, more and more applications, for easy cutting steel performance There are more and more studies. At present, Easy-cut steel mainly comprises a variety of sulfur, lead line, calcium system and compounder, selenium, titanium, etc. The most widely used sulfur-based steel, and in this type of easy cutting steel, low carbon sulfur It is highly reduced to cutting steel due to good cutting performance and chip performance, in recent years, with its significant increase in the development demand in the automatic lathe. However, low-carbon high sulfur is cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04B22D11/111C21C5/28C21C7/00C21C7/06C22C38/02C22C38/04C22C38/06C22C38/20C22C38/26C22C38/28C22C38/32
CPCC22C33/04C21C5/28C21C7/0068C21C7/0006C22C38/02C22C38/04C22C38/002C22C38/28C22C38/26C22C38/20C22C38/32C22C38/001C22C38/06B22D11/111C21C7/06
Inventor 陈扬熹
Owner 长泰县兴宏驰工贸有限公司
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