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High-phosphorus steel plate of weather-proof structure and method for preparing steel plate

A structural steel plate and weather-resistant technology, which is applied in the production process of high-phosphorus weather-resistant structural steel plate, can solve the problems of high alloy composition and increased production cost, and achieve improved weather resistance, excellent welding performance and formability, and good comprehensive mechanical properties. Effect

Active Publication Date: 2015-12-16
SHANDONG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The alloy composition of the molten weathering steel produced in the application for the invention is relatively high (C: 0.01-0.5%, Si: 0.30-0.70%, Mn: 0.30-0.70%, P: 0.05-0.15%, S: 0.01-0.04%, Cr : 2.5% Ni: 1.0~3.5%), it is bound to increase the production cost of subsequent products

Method used

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  • High-phosphorus steel plate of weather-proof structure and method for preparing steel plate
  • High-phosphorus steel plate of weather-proof structure and method for preparing steel plate
  • High-phosphorus steel plate of weather-proof structure and method for preparing steel plate

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Embodiment Construction

[0027] The steel plate of this embodiment is prepared by the following method:

[0028] Hot metal pretreatment→120t converter smelting→LF refining→RH refining→slab continuous casting→slab slow cooling→slab cleaning→heating→descaler→rough rolling→finish rolling→hot straightening→steel plate marking→slab slow cooling→ Cut→Identify→Storage.

[0029] Referring to Table 1-3, the present embodiment 1-3 is all produced by the above process, the main chemical composition of the steel is shown in Table 1, the actual production process is shown in Table 2, the mechanical properties of the steel are shown in Table 3, and the near-surface, The microstructures at 1 / 4 and 1 / 2 thickness are shown in Figure 1-3 . It can be seen that the metallographic structure of the trial-produced steel plate is composed of ferrite and pearlite, the ferrite grains are uniform and fine, and the pearlite clusters are dispersedly distributed on the ferrite matrix, which provides gold for the good comprehens...

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Abstract

The invention discloses a high-phosphorus steel plate of a weather-proof structure. The high-phosphorus steel plate of the weather-proof structure comprises, by weight, 0.05-0.11% of C, 0.20-0.45% of Si, 0.55-0.95% of Mn, 0.07-0.10% of P, 0-0.005% of S, 0.25-0.40% of Cu, 0.30-0.65% of Cr, 0-0.10% of Ni, 0.015-0.040% of Nb, 0-0.025% of Ti, 0.020% or more of Al, 0.001-0.005% of Ca, and the balance Fe and the unavoidable impurities. According to the steel plate, the reasonable alloy element ratio and the optimal rolling process are combined, the effects of anti-corrosion elements of Cu, Cr, Ni and P on improving the weather-proof performance are given to play to the largest extent, and good comprehensive mechanical performance and outstanding welding performance and moldability are guaranteed; the steel plate is particularly suitable for non-coating steel structures in heavy atmosphere corrosion conditions and particularly meets the requirement for steel of a new generation of high-strength railway vehicle.

Description

technical field [0001] The invention belongs to the technical field of micro-alloy steel production, and in particular relates to a production process method of a high-phosphorus weather-resistant structural steel plate. Background technique [0002] Corrosion, especially in the atmosphere, is one of the main forms of damage to steel materials. About 1 / 6 of the annual output of steel in the world is lost due to corrosion. In order to prevent or reduce the atmospheric corrosion of steel materials and prolong their service life, certain measures need to be taken. The atmospheric corrosion resistance and economy of weathering steel determine that weathering steel is a viable steel material. The weather-resistant steel plate can not only have excellent strength and toughness and strong plasticity matching, corrosion resistance, excellent weldability and fatigue resistance, but it is also especially suitable for use without coating, and the cost is relatively low compared with ...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/48C22C38/28C22C38/26C22C33/04C21D8/02
Inventor 王月香周平张长宏高立福赵英杰麻衡王晶秦港
Owner SHANDONG IRON & STEEL CO LTD
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