Normalized DH36 steel plate for wind power and preparation method thereof

A DH36, steel plate technology, applied in the field of iron and steel metallurgy, can solve the problems of low pass rate of thick wind power steel plates, no relevant patents and reports retrieved, poor performance uniformity and stability, etc., to achieve low comprehensive production costs and improve internal Quality, Guaranteed Purity and Effects of Cleanliness

Active Publication Date: 2020-05-15
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel plates have high requirements for strength and toughness. The pass rate of thick-gauge wind power steel plates manufactured by existing methods is not high, and the performance uniformity and stability are also poor, making comprehensive production difficult.
[0004] No relevant patents and reports specifically for this type of steel for wind power have been retrieved so far

Method used

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  • Normalized DH36 steel plate for wind power and preparation method thereof
  • Normalized DH36 steel plate for wind power and preparation method thereof
  • Normalized DH36 steel plate for wind power and preparation method thereof

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Embodiment

[0023] The process route is as follows: Weigh the components as required to obtain molten iron, KR desulfurization of molten iron, converter smelting, LF refining, RH vacuum treatment, slab continuous casting, slab reheating, rough rolling, intermediate slab cooling, finish rolling , Rapid cooling of steel plate, off-line stack cooling, ultrasonic flaw detection, shot blasting, normalizing, accelerated cooling of steel plate. The control parameters of the smelting furnace and rolling process of this embodiment are shown in Table 1, the smelting composition of the smelting furnace is shown in Table 2, the control parameters of the heat treatment process are shown in Table 3, and the mechanical properties of the steel plate after heat treatment are shown in Table 4.

[0024] Table 1 Example smelting furnaces and rolling process control parameters

[0025]

[0026] Table 2 Example smelting furnace smelting composition

[0027] C％ Si% Mn% P％ S％ Nb% Ti% Al...

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Abstract

The invention discloses a normalized DH36 steel plate for wind power and a preparation method thereof. The preparation method comprises the following steps of weighing all components according to requirements, and mixing to obtain molten iron; carrying out KR mechanical stirring desulfurization on the molten iron; carrying out converter oxygen blowing smelting; carrying out LF refining; carrying out RH vacuum treatment; feeding wires; carrying out soft stirring; carrying out continuous casting on a plate blank; reheating the plate blank; carrying out rough rolling; carrying out warm-keeping cooling on an intermediate blank; carrying out finish rolling; carrying out accelerated cooling; discharging from a production line and carrying out pile cooling and discharging; carrying out ultrasonicflaw detection; carrying out shot blasting; normalizing; carrying out accelerated cooling on the steel plate; carrying out fire cutting; and warehousing. In the reheating stage of the plate blank, the heating temperature is controlled to be 1150-1250 DEG C, and the in-furnace time is not less than 1.0min/mm; the rough rolling temperature is controlled to be 1000-1100 DEG C, and the final rollingtemperature is 860-900 DEG C; and the normalizing temperature of the steel plate is 880-900 DEG C, the normalizing in-furnace time is not less than 2.0min/mm, and the cooling temperature after normalizing is 540-600 DEG C the steel plate disclosed by the invention has the advantages of good performance, low production cost, thick applicable thickness and good application prospect.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a normalizing DH36 steel plate for wind power and a preparation method thereof. Background technique [0002] With the rapid growth of economic development in demand for electricity and the requirements of sustainable green manufacturing, offshore wind power projects are increasing and the power of generator sets is increasing. The demand for steel plates for wind power is increasing and the thickness of steel plates is increasing. Technical requirements have also been tightened. In the past, Shagang produced more steel plates with a thickness of less than 60mm, and fewer steel plates with a thickness of 60-100mm. Moreover, alloy elements such as Ni, Cu, and V were added to steel plates with similar thick specifications, and the alloy content and carbon equivalent Ceq were higher. The high cost is not conducive to the market promotion and application of Shagang's wind po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02C21D1/28C22C33/04
CPCC21D1/28C21D8/0226C21D2211/005C21D2211/009C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 赵辉聂文金郭桐李冉郭志龙林涛铸周子夜芮丰盛乔坤尚建雄叶俊文
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD
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