E500-W150 ultrahigh-strength ship plate steel and manufacturing method thereof

A manufacturing method, ship plate steel technology, applied in the direction of manufacturing tools, temperature control, metal rolling, etc., can solve the problems of low temperature, low temperature toughness deterioration, and mechanical performance decline of welded joints, etc., to achieve cost reduction, excellent weldability, Effect of inhibiting austenite growth

Inactive Publication Date: 2021-02-05
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the welding heat input is greater than 50kJ/cm, it is high-energy welding. When the welding heat input of traditional steel plates is greater than 50kJ/cm, the mechanical properties of the welded joint will be seriously reduced due to the excessive coarsening of the heat-af

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  • E500-W150 ultrahigh-strength ship plate steel and manufacturing method thereof
  • E500-W150 ultrahigh-strength ship plate steel and manufacturing method thereof

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Embodiment Construction

[0026] A kind of E500-W150 ultra-high-strength ship plate steel and its manufacturing method provided in the following examples, the steel plate thickness is 60mm, the chemical composition is shown in Table 1, the rolling cooling process parameters are shown in Table 2, and the product performance is shown in Table 3:

[0027] The main chemical composition (wt%) of the embodiment of table 1

[0028]

[0029] The rolling cooling process parameter of table 2 embodiment

[0030] Example Thickness mm Rough rolling finish temperature ℃ Finish rolling start temperature ℃ Return to red temperature ℃ 1 60 1070 835 450 2 60 1058 808 400 3 60 1081 847 500

[0031] Table 3 embodiment product performance

[0032]

[0033] It can be seen that the steel plate obtained by the present invention has good comprehensive mechanical properties, yield strength ≥ 500MPa, tensile strength ≥ 610MPa, and is suitable for high-strength ship plate steel wi...

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Abstract

The invention discloses E500-W150 ultrahigh-strength ship plate steel. The E500-W150 ultrahigh-strength ship plate steel is prepared from the following chemical components in percentage by mass: 0.04%-0.12% of C, 0.15%-0.35% of Si, 1.40%-1.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.0030% of S, 0.030%-0.060% of V, 0.010%-0.030% of Nb, 0.030%-0.080% of Alt, 0.005%-0.030% of Ti, 0.0005%-0.0040% of Ca and less than or equal to 0.0060% of N, wherein (Alt.N)/Ti is controlled to be 0.010 to 0.030. The yield strength of the E500-W150 ultrahigh-strength ship plate steel is larger than or equal to 500 MPa, the tensile strength of the E500-W150 ultrahigh-strength ship plate steel is larger than or equal to 610 MPa, the E500-W150 ultrahigh-strength ship plate steel is suitable for high-strength ship plate steel with the welding linear energy within the range of 150 kJ/cm, and the average impact energy of the HAZ of a steel plate at the temperature of 40 DEG C below zerois 50 J or above.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to an E500-W150 ultra-high-strength ship plate steel and a manufacturing method thereof. Background technique [0002] Steels for high heat input welding are widely used. For example, in the shipbuilding industry, the shipbuilding efficiency of ordinary ship plates is only a quarter of that of high heat input welding ship plates. When the country cannot produce it, it can only be imported from abroad, but the price is expensive. The high heat input welding method is the most practical way to improve the efficiency of welding construction and reduce costs. Steel for high heat input welding is one of the key development goals of my country's iron and steel industry and has broad market prospects. [0003] When the welding heat input is greater than 50kJ / cm, it is high-energy welding. When the welding heat input of traditional steel plates is greater than 50kJ / cm, th...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21C1/02C21C7/00C21C7/064C21C7/10C21D6/00C21D8/02C21D9/00C22C33/04B21B1/46B21B37/56B21B37/74
CPCB21B1/463B21B37/56B21B37/74B21B2265/10C21C1/02C21C7/0006C21C7/064C21C7/10C21D6/005C21D6/008C21D8/0221C21D9/0081C21D2211/001C21D2211/002C21D2211/005C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 赵晋斌李恒坤赵柏杰伯飞虎车马俊张晓雪邱保文黄建华
Owner NANJING IRON & STEEL CO LTD
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