High-toughness austenite type high-manganese steel plate and production method thereof

A production method, austenitic technology, applied in the field of metallurgy, can solve the problems of high resource consumption pressure and high production cost, achieve uniform structure, ensure the yield and performance of the product, and reduce the effect of low temperature brittleness

Inactive Publication Date: 2018-03-30
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel steel needs a lot of precious nickel resources for alloying in the process of production and manufacturing, so the pressure of resource consumption is high, and the corresponding production cost remains high

Method used

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  • High-toughness austenite type high-manganese steel plate and production method thereof
  • High-toughness austenite type high-manganese steel plate and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The thickness of the high-toughness austenitic high-manganese steel plate in this embodiment is 12 mm. The chemical composition and mass percentage of the steel plate are shown in Table 1.

[0036] The production method of the high-toughness austenitic high-manganese steel plate in this embodiment includes steelmaking, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0037] (1) Steelmaking process: molten steel is first smelted in the primary smelting furnace, using increased slag volume and multiple slag flows, and the tapping temperature is 1625°C; after slag removal, it is refined in an LF furnace to complete the alloying of Mn, Cr, and Nb. When the bag temperature is 1550°C, vacuum treatment is carried out in the VD furnace of the hanging bag; during the vacuum treatment process of the VD furnace, aluminum wire and Si-Ca wire are fed into the molten steel, the vacuum degree is 66Pa during vacuum treat...

Embodiment 2

[0046] The thickness of the high-toughness austenitic high-manganese steel plate in this embodiment is 25 mm. The chemical composition and mass percentage of the steel plate are shown in Table 1.

[0047] The production method of the high-toughness austenitic high-manganese steel plate in this embodiment includes steelmaking, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0048] (1) Steelmaking process: molten steel is first smelted in the primary smelting furnace, using increased slag volume and multiple slag flows, and the tapping temperature is 1630°C; after slag removal, it is refined in an LF furnace to complete the alloying of Mn, Cr, and Nb. When the bag temperature is 1545 ℃, the hanging bag is vacuum treated in VD furnace; during the vacuum treatment process of VD furnace, aluminum wire and Si-Ca wire are fed into molten steel, the vacuum degree is 66Pa during vacuum treatment, and the vacuum holding ...

Embodiment 3

[0057] The thickness of the high-toughness austenitic high-manganese steel plate in this embodiment is 30 mm, and the chemical composition and mass percentage of the steel plate are shown in Table 1.

[0058] The production method of the high-toughness austenitic high-manganese steel plate in this embodiment includes steelmaking, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0059] (1) Steelmaking process: molten steel is first smelted in the primary smelting furnace, using increased slag volume and multiple slag flows, and the tapping temperature is 1630°C; after slag removal, it is refined in an LF furnace to complete the alloying of Mn, Cr, and Nb. When the bag temperature is 1545 ℃, the hanging bag is vacuum treated in VD furnace; during the vacuum treatment process of VD furnace, aluminum wire and Si-Ca wire are fed into molten steel, the vacuum degree is 66Pa during vacuum treatment, and the vacuum hold...

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Abstract

The invention discloses a high-toughness austenite type high-manganese steel plate and a production method thereof. The steel plate consists of the following chemical components in percentage by massof 0.30-0.40% of C, 0.20-0.40% of Si, 23.50-25.50% of Mn, 7.0-7.5% of Cr, 0.020-0.040% of Al, 0.020-0.040% of Nb, less than or equal to 0.008% of P, less than or equal to 0.003% of S and the balance Fe and inevitable impurities. The production method for the steel plate comprises processes of steel-making, continuous casting, heating, rolling and thermal treatment. The chemical components of the steel plate adopt C, Mn and Cr solid solution strengthening; and the obtained steel plate has the characteristics of being high in compactness, relatively high in strength grade, high in ductility, lowin yield ratio, excellent in low-temperature impact toughness and the like, can meet requirements of the high-toughness austenite type high-manganese steel plate, has relatively good comprehensive performances and welding performances, and is relatively low in cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a high-toughness austenitic high-manganese steel plate and a production method thereof. Background technique [0002] At present, low-temperature steel plates and ultra-low temperature steel plates for pressure vessels are mostly nickel steel, which are delivered in a normalized or normalized + tempered or quenched and tempered state, such as 3.5Ni, 5Ni or 9Ni steel. Nickel is the main alloying element in the steel. Fired or normalized + tempered or quenched and tempered state delivery. Nickel steel requires a large amount of precious nickel resources for alloying in the manufacturing process, so the resource consumption pressure is high, and the corresponding production cost remains high. Therefore, there is an urgent need to develop a new type of steel plate material for ultra-low temperature environments. The steel plate should have good low-temperature impact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/02C22C38/06C22C38/26C22C33/04C21D8/02B21C37/02
CPCC22C38/38B21C37/02C21D8/0221C21D8/0247C22C33/04C22C38/02C22C38/06C22C38/26
Inventor 莫德敏邓建军赵文忠李杰赵燕青龙杰庞辉勇王通李博斌杨现亮郭维超王卓李程
Owner WUYANG IRON & STEEL
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