X120-grade pipeline steel and production method of hot rolled plate coil thereof
A production method and technology for hot-rolled coils, applied in the field of pipeline steel, can solve problems such as few reports on the trial production of hot-rolled coils
Inactive Publication Date: 2013-01-02
BEIJING SHOUGANG CO LTD
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Problems solved by technology
[0006] The strength of the X120 grade pipeline steel trial-produced by JFE and Baosteel not only meets the standard, but also has a certain margin. However, there are few reports on the trial production of X120 grade pipeline steel hot-rolled coils
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Embodiment
[0029] The embodiment of the present invention provides a kind of X120 grade pipeline steel The mass percentage of chemical composition is shown in Table 1
[0030] Table 1 The chemical composition mass percentage table of a kind of X120 grade pipeline steel provided by the embodiment of the present invention
[0031]
[0032] The technical parameters of the production method of a hot-rolled coil of X120 grade pipeline steel provided by the embodiment of the present invention are shown in Table 2
[0033] Table 2 A table of production process parameters for hot-rolled coils of X120 grade pipeline steel provided by the embodiment of the present invention
[0034]
[0035] The mechanical property testing results of a hot-rolled coil of X120 grade pipeline steel provided in the embodiment of the present invention are shown in Table 3
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Abstract
The invention discloses X120-grade pipeline steel, and belongs to the technical field of pipeline steel. The X120-grade pipeline steel comprises the following chemical components by mass: 0.04-0.06% of C; 0.15-0.35% of Si; 1.8-2.0% of Mn; not more than 0.015% of P; not more than 0.003% of S; 0.25-0.40% of Cr; 0.005-0.03% of Ti; 0.06-0.10% of Nb; 0.005-0.05% of V; 0.1-0.40% of Cu; 0.10-0.50% of Ni; 0.01-0.60% of Mo; 0.0008-0.0020% of B; and the balance of Fe and impurities. All indexes of tensile property, V-shaped gap impact property, DWTT test, metallographic structure, and banded structure of the pipeline steel can reach the technical requirements for X120-grade pipeline steel in the API 5L standard. The invention also provides a production method of the X120-grade pipeline steel hot rolled plate coil, and the method fills a gap of the technology.
Description
technical field [0001] The invention relates to the technical field of pipeline steel, in particular to a production method of X12 grade pipeline steel and its hot-rolled coil. Background technique [0002] Since the 21st century, pipeline steel has shown a trend of vigorous development, especially the construction of long-distance natural gas pipelines, which has promoted the application of high-grade pipeline steel and the development of large-diameter high-pressure transmission steel pipes. At present, the advanced pipeline steels that have been successfully developed and have built test sections include X100 grade pipeline steel and X120 grade pipeline steel. [0003] At present, in the world, the manufacturers that have trial-produced X120 grade pipeline steel mainly include Nippon Steel, European Steel Tube, JFE and Baosteel. The X120 grade pipeline steel they trial-produced is mainly wide and thick plate, and its composition system is low C-high Mn -Mo-Ti-B, with add...
Claims
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IPC IPC(8): C22C38/58
Inventor 吴新朗牛涛李明武军宽王伦李飞亢小敏杨健王学强
Owner BEIJING SHOUGANG CO LTD