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Steel plate having high elongation percentage and preparation method thereof

A technology of high elongation and steel plate, which is applied in the field of high elongation steel plate and preparation, can solve the problem of elongation reduction and achieve the effect of low cost and stable production

Inactive Publication Date: 2017-04-26
NINGBO XIANGBO MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, tensile strength, yield point, etc. are inversely proportional to elongation, and to ensure high strength, elongation decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-elongation steel plate provided in this example is composed of C: 0.15%, Si: 0.5%, Mn: 1.0%, Al: 0.2%, B: 0.0002%, Cr: 0.5%, Cu: 0.2 %, Ni: 0.2%, Mo: 0.1%, V: 0.2%, Ti: 0.6%, Re: 1.0%, P: 0.02% or less, S: 0.02% or less, and the remainder is composed of Fe and unavoidable impurities , in mass%. Described Re is La.

[0029] A method for preparing a high-elongation steel plate. The steel plate raw material is subjected to smelting, continuous casting, hot rolling, pickling, cold rolling and continuous annealing processes. The heating temperature of the hot rolling is 1100-1300 °C, and the holding time is 2 hours , the starting rolling temperature is 1100°C, the finishing rolling temperature is 850-950°C, the coiling temperature is 600-700°C, and the thickness of the hot-rolled sheet is 2-4mm;

[0030] The reagent of described pickling is the hydrochloric acid solution of 5% or the nitric acid solution of 10% by mass fraction;

[0031] The cold rolling cumulative...

Embodiment 2

[0035] A high-elongation steel plate provided in this example is composed of C: 0.25%, Si: 2.0%, Mn: 3.0%, Al: 0.5%, B: 0.0005%, Cr: 1.5%, Cu: 1.0 %, Ni: 0.5%, Mo: 0.3%, V: 0.5%, Ti: 0.6%, Re: 1.0%, P: 0.02% or less, S: 0.02% or less, and the remainder is composed of Fe and unavoidable impurities , in mass%. The said Re is Sm.

[0036] In addition, in this embodiment, the method for preparing a high-elongation steel plate by using the above-mentioned steel plate raw materials is the same as that in Example 1.

[0037] After testing, the steel plate obtained in this embodiment has a tensile strength of 350N / mm 2 , yield strength 260N / mm 2 , The elongation rate is 35%.

Embodiment 3

[0039] A high-elongation steel plate provided in this example is composed of C: 0.20%, Si: 1.0%, Mn: 1.5%, Al: 0.4%, B: 0.0003%, Cr: 1.2%, Cu: 0.8 %, Ni: 0.4%, Mo: 0.2%, V: 0.3%, Ti: 0.4%, Re: 0.8%, P: 0.02% or less, S: 0.02% or less, and the remainder is composed of Fe and unavoidable impurities , in mass%. The Re is Tb.

[0040] In addition, in this embodiment, the method for preparing a high-elongation steel plate by using the above-mentioned steel plate raw materials is the same as that in Example 1.

[0041] After testing, the steel plate obtained in this embodiment has a tensile strength of 345N / mm 2 , yield strength 240N / mm 2 , the elongation rate is 30%.

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Abstract

The invention discloses a steel plate having high elongation percentage. The steel plate is characterized by consisting of the following components, by mass percent, 0.15-0.25% of C, 0.5-2.0% of Si, 1.0-3.0% of Mn, 0.2-0.5% of Al, 0.0002-0.0005% of B, 0.5-1.5% of Cr, 0.2-1.0% of Cu, 0.2-0.5% of Ni, 0.1-0.3% of Mo, 0.2-0.5% of V, 0.3-0.6% of Ti, 0.5-1.0% of Re, less than 0.02% of P, less than 0.02% of S, and the balance Fe and unavoidable impurities. The tensile strength of the steel plate having high elongation percentage is 330-350N / mm<2>, the yield strength is 190-260N / mm<2>, the elongation percentage is 25-35%, and the steel plate has the advantage of low cost, and stable production can be realized.

Description

technical field [0001] The invention relates to a high-elongation steel plate and a preparation method thereof. Background technique [0002] With the continuous improvement of people's requirements for environmental protection, safety and energy saving, there are more application fields for steel plates with high elongation, such as building materials, machinery, ventilation equipment, etc., but steel plates used for building materials and construction machinery, etc. High strength and good low-temperature toughness in the base metal and welded joint are required, and in particular, excellent workability and weldability based on elongation are required so that it can withstand the severe environment of the work site. However, in general, strengths such as tensile strength and yield point are inversely proportional to elongation, and the elongation decreases when high strength is to be ensured. Therefore, there is a need for a steel plate and a preparation method that can e...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/58C22C38/54C22C38/42C22C38/44C22C38/46C22C38/50
CPCC22C38/04C22C38/005C22C38/02C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/54C22C38/58
Inventor 谢旭波
Owner NINGBO XIANGBO MACHINE