A kind of low internal stress titanium-containing high-strength steel and production method
A production method and technology of internal stress, applied in the field of high-strength steel manufacturing, can solve the problems of not mentioning the internal stress of steel plates, difficulty in market promotion and application, and high alloy cost, and achieve excellent transverse and longitudinal bending performance, excellent flatness, and alloy. low content effect
Active Publication Date: 2020-10-30
武汉钢铁有限公司
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Problems solved by technology
However, it contains high Cr, Ni, Mo, etc., the cost of the alloy is high, and the process flow is long, so it is difficult to promote and apply it in the market
In addition, there is no mention of the internal stress of the steel plate
Method used
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Examples
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Embodiment 1～3
[0051] Examples 1-3, a low internal stress titanium-containing high-strength steel, the specific chemical components and their weight percentages are shown in Table 1; Comparative Examples 1-2, the chemical components and their weight percentages are also shown in Table 1:
[0052] Table 1
[0053]
[0054]
[0055] The concrete process data of production process feature among embodiment 1-3 and comparative example 1-2 is shown in Table 2:
[0056] Table 2
[0057]
[0058] According to national standards GB / T228 and GB / T231, the properties of the low internal stress high-strength steels described in Examples 1-3 and Comparative Examples 1-2 are shown in Table 3.
[0059] table 3
[0060]
[0061] It can be seen that the tensile properties of the examples and the comparative examples are basically at the same level, but the low-temperature impact energy of the examples is relatively higher, which has a certain relationship with the lower internal stress and unifo...
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Abstract
The invention relates to low-internal-stress titanium-containing high-strength steel. A steel plate comprises the following chemical components in percentage by mass: 0.06%-0.11% of C, 0.10%-0.25% ofSi, 1.1%-1.4% of Mn, not greater than 0.015% of P, not greater than 0.005% of S, 0.06%-0.10% of Ti, 0.010%-0.030% of Nb, not greater than 0.005% of N, 0.02%-0.05% of Als, 13%-17% of Mn / C, 3.5%-4.5% ofTi / Nb, and the balance Fe and impurities. The process route of blast furnace molten iron, molten iron desulfurization, converter smelting, LF+RH refining, continuous casting, hot charging and hot transporting, heating, rolling, laminar cooling, reeling, decoiling and finishing, and heat treatment. The low-internal-stress titanium-containing high-strength steel is low in internal stress absolute value and high in uniformity; and the transversal and longitudinal bending performance is excellent, and capable of reaching d=a,180 degrees and qualified, and the low-internal-stress titanium-containing high-strength steel is not warped in the case of being bent in a full-length direction, and excellent in straightness.
Description
technical field [0001] The invention relates to the field of high-strength steel manufacturing, in particular to a low internal stress titanium-containing high-strength steel and a production method. Background technique [0002] Low-alloy high-strength steel is a high-strength steel that adds Mo, Nb, V, Ti and other microalloying elements to C-Mn steel. It is widely used in construction machinery and other industries. As the strength level continues to increase, the cooling during the rolling process is uniform. It is becoming more and more difficult to control the stability and stability, which directly affects the internal stress and the shape of the finished plate. Even after being straightened by high-strength straightening equipment, better shape quality can be obtained, but once the user flame or plasma cuts the steel plate, the Under the influence of uneven temperature, the internal stress is released, causing secondary warpage and deformation of the steel plate, mak...
Claims
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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02C21D1/18
CPCC21D1/18C21D8/0226C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 何亚元宋育来陆在学李利巍徐进桥杨海林张鹏武王跃张扬
Owner 武汉钢铁有限公司