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Economical austenitic stainless steel and technique for producing the same

A technology of austenitic stainless steel and production process, which is applied in the field of metallurgy, can solve problems such as improper composition control, poor performance, and increased costs, and achieve the effects of resource saving, low price, and good formability

Inactive Publication Date: 2009-05-20
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now there are some austenitic stainless steels with improper control of nickel, chromium and copper components, resulting in unnecessary waste, increased cost, and poor performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] The composition of embodiment one of the present invention, embodiment two and embodiment three is as follows table (wt%):

[0026] Table 1

[0027] project C mn Si p S Cr Ni Cu Re N Fe Example 1 0.07 13.00 0.40 0.026 0.014 12.51 0.59 0..58 0.10 0.12 margin Example 2 0.08 13.50 0.50 0.030 0.015 13.05 0.60 0.60 0.12 0.14 margin Example 3 0.07 13.40 0.53 0.025 0.010 13.00 0.62 0.62 0.16 0.15 margin

Embodiment 1

[0028] The production technology of embodiment one, embodiment two and embodiment three is respectively as follows:

[0029] Embodiment one

[0030] An economical austenitic stainless steel production process, including smelting and casting processes, ingot casting, blanking, forging and rolling or continuous casting and rolling processes and solid solution treatment processes,

[0031] Before the smelting process, water and oil stains should be removed from scrap steel and raw materials, and refractory materials and ferroalloys should be baked.

[0032] In the smelting and casting process, to ensure that the molten steel is fully deoxidized, ferrochromium nitride is added to the molten steel, and the ferrochromium nitride is pressed into the steel, and silicon calcium powder or rare earth ferrosilicon powder is used for diffusion deoxidation. Add rare earth ferrosilicon into the ladle. The R content in the rare earth ferrosilicon is 21.00%, the Si content is 44.0%, the Ca5.0...

Embodiment 2

[0036] An economical austenitic stainless steel production process, including smelting and casting processes, ingot casting, blanking, forging and rolling or continuous casting and rolling processes and solid solution treatment processes,

[0037] Before the smelting process, water and oil stains should be removed from scrap steel and raw materials, and refractory materials and ferroalloys should be baked.

[0038]In the smelting and casting process, to ensure that the molten steel is fully deoxidized, ferrochromium nitride is added to the molten steel, and the ferrochromium nitride is pressed into the steel, and silicon calcium powder or rare earth ferrosilicon powder is used for diffusion deoxidation. Add rare earth ferrosilicon into the ladle. The R content in the rare earth ferrosilicon is 22.00%, the Si content is 40.0%, the Ca content is 4.0%, the Ti content is 2.0%, and the Fe balance is used. The particle size of the rare earth ferrosilicon is ￠15mm. It is carried out ...

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Abstract

The invention relates to an economic austenite stainless steel and a production technique thereof. The economic austenite stainless steel comprises the following compositions by weight percent: equal to or less than 0.10 of C, 12.50 to 15.0 of Cr, 12.00 to 15.00 of Mn, 0.50 to 1.50 of Ni, 0.40 to 0.80 of Cu, 0.08 to 0.16 of N, 0.40 to 0.80 of Si, less than or equal to 0.035 of P, less than or equal to 0.020 of S, 0.08 to 0.18 of Re, and the balance of Fe and unavoidable impurities. The invention takes the condition of general atmosphere corrosion resistance into consideration in the composition design, also considers lowest cost principle and further considers that the invention is beneficial to improving forging, rolling and heat processing performances and cold processing performance, is economical and practical and has no magnetic property.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a stainless steel and a production process thereof, in particular to an economical austenitic stainless steel and a production process thereof. Background technique [0002] The earth's resources for manufacturing chromium-nickel austenitic stainless steel are really limited. Nickel, chromium, and copper are all strategic materials. Although carbon and nitrogen are strong austenite-forming elements, they cannot be used in large quantities. People's demand for stainless steel is increasing day by day. Due to historical reasons, people prefer austenitic stainless steel. Therefore, it is necessary to produce more economical austenitic stainless steel to meet the general atmospheric corrosion conditions: decoration Use plates, tubes, household kitchen supplies as needed. Now there are some austenitic stainless steels whose nickel, chromium and copper components are improperly controlled, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C21C7/06C21D6/00
CPCY02P10/20
Inventor 王时林
Owner NANJING IRON & STEEL CO LTD
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