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Microalloyed high-silicon-manganese nitrogen-containing austenitic stainless steel material and preparation method

A high silicon-manganese type, stainless steel technology, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve problems such as hindering popularization and application, inability to produce, etc., achieve good horizontal and vertical strength and toughness matching ratio and wear resistance, and improve alloy production. High efficiency and purity

Active Publication Date: 2021-06-25
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the silicon content is too high, greater than 4 to 5%, brittle intermetallic phases, such as σ phase, are easily precipitated during hot working or heat treatment, resulting in easy embrittlement of the steel. The processing and heat treatment requirements are very high, making it impossible for general factories to produce this series of steel grades, hindering their popularization and application

Method used

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  • Microalloyed high-silicon-manganese nitrogen-containing austenitic stainless steel material and preparation method
  • Microalloyed high-silicon-manganese nitrogen-containing austenitic stainless steel material and preparation method
  • Microalloyed high-silicon-manganese nitrogen-containing austenitic stainless steel material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The electroslag remelting electrode rod of high silicon manganese nitrogen-containing stainless steel has a unit weight of 450kg and a total of 900kg. Using a 500kg vacuum induction furnace, according to C: 0.045%, Cr: 16.8%, Ni: 8.5%, Si: 3.9%, Mn: 8.3%, N: 0.15%, Fe: 61.5%, Mo: 0.3%, V: 0.15 %, Nb: 0.1%, Cu: 0.1% composition ratio, Fe, Cr, Ni, Mo, Nb are used as primers, placed at the bottom of the crucible, C, Si, Mn, Cu, iron vanadium master alloy, micro Small materials such as carbon ferrochrome are placed in the hopper.

[0027] After the base material is completely melted, add small materials in batches under a protective atmosphere, and cast into cylindrical electrode rods after passing the component test. The diameter of the electrode rods is Φ260mm, 2 pieces. After the surface of the rod is sanded and finished, a remelting electrode rod for electroslag remelting is obtained.

[0028] The electroslag remelting slag system of high-silicon-manganese nitrogen-co...

example 2

[0037]The electroslag remelting electrode rod of high silicon manganese nitrogen-containing stainless steel has a unit weight of 1300kg and a total of 2600kg. Using 3000kg vacuum induction furnace, according to C: 0.042%, Cr: 17.0%, Ni: 8.3%, Si: 3.95%, Mn: 8.10%, N: 0.14%, Fe: 61.2%, Mo: 0.5%, V: 0.13 %, Nb: 0.15%, Cu: 0.25% composition ratio, Fe, Cr, Ni, Mo, Nb are used as primers, placed at the bottom of the crucible, C, Si, Mn, Cu, iron vanadium master alloy, micro Small materials such as carbon ferrochrome are placed in the hopper.

[0038] After the base material is completely melted, add small materials in batches under a protective atmosphere, and cast into cylindrical electrode rods after passing the component test. The diameter of the electrode rods is Φ400mm, 2 pieces. After the surface of the rod is sanded and finished, a remelting electrode rod for electroslag remelting is obtained.

[0039] The electroslag remelting slag system of high-silicon-manganese nitroge...

Embodiment 3

[0048] The electroslag remelting electrode rod of high silicon manganese nitrogen-containing stainless steel has a unit weight of 450kg and a total of 900kg. Using a 500kg vacuum induction furnace, according to C: 0.040%, Cr: 16.7%, Ni: 8.3%, Si: 4.1%, Mn: 7.9%, N: 0.16%, Fe: 62.1%, Mo: 0.3%, V: 0.1 %, Nb: 0.12% composition ratio, Fe, Cr, Ni, Mo, Nb are used as primers, placed at the bottom of the crucible, C, Si, Mn, Cu, iron vanadium master alloy, micro-carbon ferrochrome and other small Put the material in the hopper.

[0049] After the base material is completely melted, add small materials in batches under a protective atmosphere, and cast into cylindrical electrode rods after passing the component test. The diameter of the electrode rods is Φ200mm, and there are 4 pieces. After the surface of the rod is sanded and finished, a remelting electrode rod for electroslag remelting is obtained.

[0050] The electroslag remelting slag system of high-silicon-manganese nitrogen-...

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Abstract

The invention relates to a microalloyed high-silicon-manganese nitrogen-containing austenitic stainless steel material and a preparation method thereof. The weight percentage of each component of the high-silicon-manganese nitrogen-containing stainless steel material is: C: 0.03-0.06% , Cr: 16.0~17.5%, Ni: 8.0~9.0%, Si: 3.5~4.5%, Mn: 7.5~9.0%, N: 0.10~0.18%, Mo: 0.1~0.6%, V: 0.05~0.2%, Nb: 0.05 to 0.2%, Cu: 0.1 to 0.5%, and Fe as the balance. The high-silicon-manganese-nitrogen-containing austenitic stainless steel prepared by the method of the present invention has good cold and hot workability, excellent horizontal and vertical room temperature, high temperature mechanical properties, toughness and plasticity, and good corrosion resistance. , greatly improving the yield of the alloy.

Description

technical field [0001] The invention belongs to the field of metallurgical preparation of metal materials, in particular to a microalloyed high-silicon-manganese nitrogen-containing austenitic stainless steel material and a preparation method. Background technique [0002] Nitrogen can not only improve the local corrosion resistance of stainless steel such as pitting corrosion and crevice corrosion, but also improve the strength and toughness. At the same time, nitrogen is an effective austenite forming element, and the ability to stabilize the austenite matrix is ​​even 30 times that of nickel. Nitrogen-containing austenitic stainless steel is to add an appropriate amount of nitrogen to austenitic stainless steel to replace part of nickel, thereby reducing material costs, but in order to improve the solubility of nitrogen in stainless steel, it is necessary to add a certain amount of nitrogen to stainless steel manganese. Silicon can improve the passivation ability of iro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22B9/18C22C38/34C22C38/42C22C38/44C22C38/46C22C38/48C22C38/58
CPCC22B9/18C22C33/06C22C38/001C22C38/34C22C38/42C22C38/44C22C38/46C22C38/48C22C38/58Y02P10/25
Inventor 刘海定陈登华王东哲何曲波王方军刘应龙田源喻峰
Owner CHONGQING MATERIALS RES INST
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