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High-aluminum stainless steel based on 310S

A stainless steel and high-aluminum technology, applied in the field of high-aluminum stainless steel based on 310S, can solve the problems of large difference in thermal expansion coefficient, easy to cause cracks, easy to peel off, etc. Effect

Inactive Publication Date: 2009-09-02
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the a-Cr on the alloy surface 2 o 3 The difference in thermal expansion coefficient between the film and the substrate is large, it is easy to peel off under thermal stress, and the plasticity is also poor. It is easy to cause cracks when the surface is deformed. At the same time, it is easy to oxidize into volatile CrO when the temperature is higher than 1000 °C. 3 , volatilization causes thinning of the oxide film, which is the formation of Cr 2 o 3 One of the main reasons why membrane alloys and coatings can only be used below 1000°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In terms of mass percentage, Ni: 20%, Al: 2%, Cr: 25%, Si: 1.5%, C: 0.08%, and the balance is Fe. Weigh the corresponding components, and put the weighed powder in the planetary Mix in a ball mill for 8 hours, press the mixed powder into a Φ20×50 cylinder, melt in a WS-4 non-consumable vacuum arc melting furnace with a current of 250A, and repeatedly vacuumize several times before the reaction. Argon protection. During smelting, the sample is turned over and smelted several times to make it melt better and reduce defects. After the reaction was completed, the sample was cooled to room temperature in a water-cooled copper crucible to obtain an alloy. Performance data: hardness (HV) 195.32, yield strength σ 0 . 2 =314MPa, the corrosion rate is 18.21g / m 2 h.

Embodiment 2

[0015] In terms of mass percentage, Ni: 20%, Al: 6%, Cr: 25%, Si: 1.5%, C: 0.08%, and the balance is Fe. Weigh the corresponding components, and put the weighed powder in the planetary Mix in a ball mill for 8 hours, press the mixed powder into a Φ20×50 cylinder, melt in a WS-4 non-consumable vacuum arc melting furnace with a current of 250A, and repeatedly vacuumize several times before the reaction. Argon protection. During smelting, the sample is turned over and smelted several times to make it melt better and reduce defects. After the reaction was completed, the sample was cooled to room temperature in a water-cooled copper crucible to obtain an alloy. Performance data: hardness (HV) 476.17, yield strength σ 0.2 =1164MPa, corrosion rate 9.84g / m 2 h.

Embodiment 3

[0017] In terms of mass percentage, Ni: 20%, Al: 10%, Cr: 25%, Si: 1.5%, C: 0.08%, and the balance is Fe. Weigh the corresponding components, and put the weighed powder in the planetary Mix in a ball mill for 8 hours, press the mixed powder into a Φ20×50 cylinder, melt in a WS-4 non-consumable vacuum arc melting furnace with a current of 250A, and repeatedly vacuumize several times before the reaction. Argon protection. During smelting, the sample is turned over and smelted several times to make it melt better and reduce defects. After the reaction was completed, the sample was cooled to room temperature in a water-cooled copper crucible to obtain an alloy. Performance data: hardness (HV) 450.8, yield strength σ 0.2 =1081MPa, the corrosion rate is 4.76g / m 2 h.

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Abstract

The invention discloses high-aluminum stainless steel based on 310S, which comprises the following compositions by mass percentage: 19.00 to 22.00 percent of nickel, 24.00 to 26.00 percent of chromium, less than or equal to 1.5 percent of silicon, less than or equal to 0.035 percent of phosphorus, less than or equal to 0.03 percent of sulfur, less than or equal to 0.08 percent of carbon, less than or equal to 2.0 percent of manganese, 2 to 10 percent of aluminum and the balance of iron.

Description

technical field [0001] This material is a stainless steel, mainly working in high temperature environment. Background technique [0002] At present, there are many kinds of stainless steel. Due to its excellent stainless and corrosion resistance and many other excellent properties, it has been widely used in various industrial sectors and daily life. Currently used 310S material, its oxidation resistance mainly depends on FeO Cr 2 o 3 Oxide film formation. But the a-Cr on the alloy surface 2 o 3 There is a large difference in thermal expansion coefficient between the film and the substrate, and it is easy to peel off under thermal stress, and the plasticity is also poor. It is easy to cause cracks when the surface is deformed. At the same time, it is easy to oxidize into volatile CrO when the temperature is higher than 1000 °C 3 , volatilization causes thinning of the oxide film, which is the formation of Cr 2 o 3 One of the main reasons why membrane alloys and coatin...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/40
Inventor 喇培清刘闪亮张秀萍
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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