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High-strength martensite stainless steel plate and production method thereof

A technology of martensitic stainless steel and production method, which is applied in high-strength martensitic stainless steel plate and its production field, can solve the problems of unguaranteed plate shape, difficult production, unstable performance, etc., and achieve good appearance quality and surface quality Good, stable performance and good effect

Active Publication Date: 2015-12-09
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although 0Cr16Ni5Mo1 steel plate has good comprehensive properties, it has high technical content, and it is particularly prone to problems such as bursting, unguaranteed plate shape, and unstable performance during the production process, making production extremely difficult; and it is prone to low toughness and cracking in application. , tissue abnormalities, etc.

Method used

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  • High-strength martensite stainless steel plate and production method thereof
  • High-strength martensite stainless steel plate and production method thereof
  • High-strength martensite stainless steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: The high-strength martensitic stainless steel plate adopts the following composition ratio and production steps.

[0037] The thickness of the martensitic stainless steel plate is 43mm, and the mass percentage of chemical composition is: C0.020%, Si0.50%, Mn0.50%, P0.015%, S0.005%, Ni4.50%, Cr15 .00%, Mo0.80%, H0.00013%, N0.0260%, the balance is Fe and unavoidable impurities.

[0038] The production steps of this martensitic stainless steel plate are as follows: (1) Billet opening process: clean the surface before loading the steel, lower the furnace temperature to 280°C and load it, and then stew the steel for 5 hours; , the heating rate is 8°C / h; between 400°C and 650°C, the heating rate is 18°C / h; between 650°C and 900°C, the heating rate is 25°C / h; the maximum heating temperature is 1180°C. After 96 hours of heating, billet rolling is carried out. The thickness of the billet is 220mm. After the billet is opened, when the temperature drops to 650°C, p...

Embodiment 2

[0045] Embodiment 2: The high-strength martensitic stainless steel plate adopts the following composition ratio and production steps.

[0046] The thickness of this martensitic stainless steel plate is 44mm, and the mass percentage of chemical composition is: C0.025%, Si0.95%, Mn0.61%, P0.020%, S0.006%, Ni4.70%, Cr15 .88%, Mo0.91%, H0.00020%, N0.0350%, the balance is Fe and unavoidable impurities.

[0047] The production steps of this martensitic stainless steel plate are as follows: (1) Steel ingot billeting process: clean the surface of the steel ingot before loading the steel, lower the furnace temperature to 250°C and load it, and then stew the steel for 5.5 hours; use low-speed burning steel, 400 Below ℃, the heating rate is 9°C / h; between 400°C and 650°C, the heating rate is 19°C / h; between 650°C and 900°C, the heating rate is 25°C / h, and the maximum heating temperature is 1180°C. After 92 hours of heating, the steel ingot is rolled at a uniform temperature, and the bla...

Embodiment 3

[0054] Embodiment 3: The high-strength martensitic stainless steel plate adopts the following composition ratio and production steps.

[0055] The thickness of the martensitic stainless steel plate is 44mm, and the mass percentage of chemical composition is: C0.045%, Si0.85%, Mn0.88%, P0.019%, S0.009%, Ni5.10%, Cr15 .88%, Mo0.91%, H0.00013%, N0.0350%, the balance is Fe and unavoidable impurities.

[0056] The production steps of this martensitic stainless steel plate are as follows: (1) Steel ingot billeting process: clean the surface before loading steel, lower the furnace temperature to 260°C to assemble steel, and then stew steel for 5.0h; adopt low-speed burning steel, 400°C Below, the heating rate is 9°C / h; between 400°C and 650°C, the heating rate is 19°C / h; between 650°C and 900°C, the heating rate is 26°C / h, and the maximum heating temperature is 1180°C. After 94 hours of heating, the steel ingot is rolled at a uniform temperature, and the billet opening process adopt...

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Abstract

The invention discloses a high-strength martensite stainless steel plate and a production method thereof. The production method comprises a cogging process, a rolling process and a thermal treatment process. The steel plate consists of the following chemical components in percentage by mass: less than or equal to 0.06% of C, less than or equal to 1.00% of Si, less than or equal to 1.00% of Mn, less than or equal to 0.030% of P, less than or equal to 0.015% of S, 15.00%-17.00% of Cr, 4.50%-5.50% of Ni, 0.80%-1.20% of Mo, less than or equal to 0.00025% of H, greater than or equal to 0.020% of N, and the balance of Fe and inevitable impurities. The rolling process adopts whole-process water-avoiding quick rolling without extruding by use of a vertical stick; after being cogged, steel ingot is introduced into a slow cooling pit to carry out slow cooling; the rolling process adopts multi-pass heating quick rolling with small rolling reduction; and the thermal treatment process adopts a quenching and tempering process. The steel plate is good in plate form and stable in performance, good in room-temperature tensile strength and yield strength, good in low-temperature impact toughness at a temperature of (-)40 DEG C and good in ductility.

Description

technical field [0001] The invention relates to a stainless steel and a production method thereof, in particular to a high-strength martensitic stainless steel plate and a production method thereof. Background technique [0002] As my country pays more and more attention to marine strategy, the report of the 18th National Congress of the Communist Party of China pointed out that it is necessary to improve the ability to develop marine resources, resolutely safeguard the national marine rights and interests, and advance towards the dream of a maritime power. These requirements require us to build more various ships and large ships, so there is an urgent need for high-performance steel plates that can be used in ships and ships. The working environment of ships and ships has strict requirements on the properties of steel plates, requiring them to have good low-temperature impact toughness and high yield strength, as well as high strength, high toughness, and corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C21D8/02
Inventor 王九清叶建军谢良法赵喜伟
Owner WUYANG IRON & STEEL
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