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A kind of micro-alloyed anti-dust corrosion stainless steel and its manufacturing method

A technology of micro-alloying and stainless steel, which is applied in the field of micro-alloying anti-dust corrosion stainless steel and its manufacturing, can solve the problems of no major breakthrough in dust resistance and corrosion performance, high cost of chrome-nickel alloy, and increase of user cost, etc., to achieve Effects of inhibiting dusting corrosion, promoting rapid formation, and preventing diffusion

Active Publication Date: 2021-12-14
长沙唐哥博金不锈钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the stainless steel materials used in domestic ultra-clean pipes and other dusty and corrosive working environments are made of chromium-nickel alloy steel 316L, etc. The foreign materials are basically extended on the basis of 316, and the dust and corrosion resistance of the products has not been compared. The big breakthrough, coupled with the high cost of chromium-nickel alloys and short service life, frequent replacement has caused a secondary increase in the user's cost, and the indirect cost increase caused by the decrease in the purity of the transported gas has a greater loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The alloy composition by weight percentage is: 0.01%C, 14.0%Cr, 10.0%Ni, 1.0%Mn, 1.0%Mo, 0.5%W, 0.5%Ti, 0.5%Al, 0.05%Sc, ≤0.035%P, ≤ 0.035% S, the balance is Fe and impurities. The melting temperature is 1550°C, and the casting temperature is 1500-1520°C. Al is added as a deoxidizer during smelting (the amount added is 0.2% by weight), and a 2×10mm flat Al-clad Sc metal strip (Al layer thickness 0.10-0.15mm) is fed into the tundish at a speed of 9.6m / ton of molten steel. ). Funnel-type crystallizer is adopted, the casting section width is 900-1500mm, the thickness is 70-50mm, the casting speed is 4-5m / min, the upper dummy rod speed is 4m / min, the mold amplitude is ±5mm, and the vibration frequency is 250 times / min. The outlet temperature of heating before rolling is 1170±10°C, the temperature of final rolling is 890±25°C, and the reduction rate of rolling mill is 40%~50%. Air cooling is used after rolling to obtain the final profile.

[0046] The hardness of the all...

Embodiment 2

[0048] The alloy composition by weight percentage is: 0.01%C, 14.0%Cr, 10.0%Ni, 1.0%Mn, 1.0%Mo, 0.5%W, 0.5%Ti, 0.5%Al, 0.10%Sc, ≤0.035%P, ≤ 0.035% S, the balance is Fe and impurities. The melting temperature is 1550°C, and the casting temperature is 1500-1520°C. Al is added as a deoxidizer during smelting (the amount added is 0.2% by weight), and a 2×10mm flat Al-clad Sc metal strip (Al layer thickness 0.10-0.15mm) is fed into the tundish at a speed of 19.2m / ton of molten steel. ). The funnel-type crystallizer is adopted, the casting speed is 4-5m / min, the upper dummy rod speed is 4m / min, the mold amplitude is ±5mm, and the vibration frequency is 250 times / min. The outlet temperature of heating before rolling is 1170±10°C, the temperature of final rolling is 890±25°C, and the reduction rate of rolling mill is 40%~50%. Air cooling is used after rolling to obtain the final profile.

[0049] The hardness of the alloy obtained in this embodiment is HRB 79, the yield strength i...

Embodiment 3

[0051] The alloy composition by weight percentage is: 0.01%C, 15.0%Cr, 12.0%Ni, 1.0%Mn, 1.0%Mo, 0.5%W, 0.5%Ti, 0.5%Al, 0.10%Sc, ≤0.035%P, ≤ 0.035% S, the balance is Fe and impurities. The melting temperature is 1560°C, and the casting temperature is 1500-1550°C. Al is added as a deoxidizer during smelting (the amount added is 0.2% by weight), and a 2×10mm flat Al-clad Sc metal strip (Al layer thickness 0.10-0.15mm) is fed into the tundish at a speed of 19.2m / ton of molten steel. ). The funnel-type crystallizer is adopted, the casting speed is 4-5m / min, the upper dummy rod speed is 4m / min, the mold amplitude is ±5mm, and the vibration frequency is 250 times / min. The outlet temperature of heating before rolling is 1170±10°C, the temperature of final rolling is 890±25°C, and the reduction rate of rolling mill is 40%~50%. Air cooling is used after rolling to obtain the final profile.

[0052] The hardness of the alloy obtained in this embodiment is HRB 79, the yield strength i...

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Abstract

The invention discloses a micro-alloyed anti-dust corrosion stainless steel and a manufacturing method thereof, wherein the material components of the micro-alloy anti-dust corrosion stainless steel are: C: 0.01-0.03%, Cr: 14.00-15.00%, Ni: 10-14%, Si: 0-0.50%, Mn: 1.00-2.00%, Mo: 1.0-1.5%, W: 0.5-1.0%, Ti: 0.5-1.0%, Al: 0.5-1.0%, Sc : 0.05~0.15%, P: ≤0.035%, S: ≤0.030%; the total amount of other metal and non-metal elements except Fe is not more than 1%; the balance is Fe. The present invention has good dust-resistant corrosion performance and the ability to prevent steel from inhaling air during use in a dusty and corrosive working environment. In this environment, its estimated service life is 0.5 times that of 316L stainless steel, and the ultra-pure pipe transports pure gas Air pollution decreased by 50%.

Description

technical field [0001] The invention relates to a functional stainless steel and a manufacturing method thereof, in particular to a micro-alloyed anti-dust corrosion stainless steel and a manufacturing method thereof, which are mainly used in working environments with dust corrosion such as ultra-clean pipes. Background technique [0002] In recent years, the production of microelectronic products represented by large-scale integrated circuits has increasingly stringent requirements for the purity and impurity content of high-purity gases. , The dew point requirements are getting higher and higher, and the piping technology of high-purity gas is increasingly concerned and valued. In the semiconductor industry and the biopharmaceutical industry, high-purity or ultra-pure clean gases need to be transported to the point of use (POU) through pipelines. In order to meet the quality requirements of the process for the gas, when the gas outlet index is certain, more attention shoul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/50C22C38/58C21D8/00C22C33/04
CPCC22C38/02C22C38/04C22C38/58C22C38/44C22C38/50C22C38/06C22C38/005C22C33/04C21D8/005
Inventor 杜晓东孙建张真邱明坤成天东
Owner 长沙唐哥博金不锈钢制品有限公司
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