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Structural steel wire and method for improving machinability of structural steel wire

A technology of cutting performance and structural steel, applied in the field of iron and steel smelting, can solve the problems of long production cycle and unsuitable production, and achieve the effect of suitable hardness and good plasticity

Active Publication Date: 2020-02-14
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process not only requires heat treatment equipment, but also has a long production cycle, which is not suitable for large-scale industrial production

Method used

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  • Structural steel wire and method for improving machinability of structural steel wire
  • Structural steel wire and method for improving machinability of structural steel wire
  • Structural steel wire and method for improving machinability of structural steel wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Structural steel wire, the chemical composition is as follows.

[0060] C:0.45%, Si:0.2%, Mn:0.7%, P:0.023%, S:0.026%, Ni:0.011%, Cr:0.038%, Cu:0.060%, Ni+Cr≤0.049%; Mn / S 20-40; Als: 0.016%, Class A inclusion level (using GB / T10561A method) level 1.5.

[0061] Smelting method:

[0062] The molten iron does not undergo desulfurization pretreatment, and the converter taps the molten steel for deoxidation and alloying. Firstly, 2.0kg / t of aluminum and iron is added for tapping, and then alloying elements such as C and Mn are added to adjust the composition of the molten steel to the lower limit of the range, and finally 3.0kg of slag lime is added. / t, synthetic slag 2.5kg / t.

[0063] 2.0kg / t of lime and 4.5kg / t of low alkalinity slag are added to the LF refining furnace to control the composition of refining slag, and the basicity of refining slag is 2.0. According to the process sample, the LF refining furnace uses sulfur iron or sulfur iron wire to gradually adjust t...

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Abstract

The invention discloses a structural steel wire and a method for improving the machinability of the structural steel wire, and belongs to the field of steel smelting. The structural steel wire is composed of 0.42-0.48% of C, 0.15-0.35% of Si, 0.6-0.9% of Mn, 0-0.030% of P, 0.012-0.028% of S, 0.003-0.2% of Ni, 0.02-0.2% of Cr, 0.02-0.3% of Cu, 0-0.35% of Ni+Cr, 20-40% of Mn / S, class-A mingled substances with the grade 1-3, 0.010-0.035% of Als and the balance Fe and inevitable impurities. The structural steel wire has good machinability.

Description

technical field [0001] The present application relates to the field of iron and steel smelting, in particular, to a structural steel wire rod and a method for improving the cutting performance of the structural steel wire rod. Background technique [0002] In the application of structural steel wire, it usually needs to be processed properly in order to meet the requirements of specific size and shape. However, the cutting performance of existing structural steel wire rods is not good, which often leads to problems such as damage to the tool during cutting, low efficiency, and increased processing costs. Aiming at these problems of structural steel wire rods, some attempts have been made in the prior art to try to solve the above predicament. [0003] For example, the invention patent with the patent number CN201810458364 is a control method for improving the machinability of high-sulfur free-cutting steel. This invention discloses a way to improve the machinability of free...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C33/04C21D8/06
CPCC21D8/065C21D2211/005C21D2211/009C22C33/04C22C38/02C22C38/04C22C38/06C22C38/42
Inventor 胡娟李成良黄德智周楠谢杰智雷中钰敖永明农之江刘金源刘春林
Owner SGIS SONGSHAN CO LTD
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