CN104846278A - Atmospheric corrosion-resistant steel - Google Patents
Atmospheric corrosion-resistant steel Download PDFInfo
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- CN104846278A CN104846278A CN201510286448.9A CN201510286448A CN104846278A CN 104846278 A CN104846278 A CN 104846278A CN 201510286448 A CN201510286448 A CN 201510286448A CN 104846278 A CN104846278 A CN 104846278A
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- steel
- atmospheric corrosion
- resistant steel
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- corrosion resistance
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Abstract
The invention relates to an atmospheric corrosion-resistant steel. The atmospheric corrosion-resistant steel is prepared from the following components in percentage by weight: 0.06-0.10% of C, 0.20-0.30% of Si, 0.20-0.90% of Mn, 0.20-0.60% of Cu, 0.03-0.06% of V, less than or equal to 0.30% of Mo, less than or equal to 0.05% of RE, and the balance of Fe and inevitable trace impurities; according to the atmospheric corrosion-resistant steel, cheap nickel laterite ore resources are used for producing the atmospheric corrosion-resistant steel instead of partial iron ore resources, and therefore, such elements as nickel and chromium in the nickel laterite ore are utilized thoroughly, no extra nickel-chromium alloy needs to be added, the production process is simplified, the cost is reduced, the obdurability of the profile steel is improved, and especially, the atmospheric corrosion resistance of the steel can be obviously improved.
Description
Technical field
The present invention relates to Midst-and-low alloy steel field of smelting, be specifically related to a kind of atmosphere corrosion resistance structural steel.
Background technology
There is a large amount of offshore oil and gas resources in China, particularly deep-sea, has exploration-development potential, the carrier of ocean steel construction is all the spatial complex structure be made up of sheet material and section bar, from China's oceanographic engineering current situation and future developing trend, estimate " 12 " period, all kinds of Marine Engineering Steel annual requirement will reach 3,000,000 tons ~ 3,500,000 tons
Ocean energy resources construction steel has a extensive future, in view of China mainland frame shallow sea area is wide, Oversea wind aboundresources, the construction of marine wind electric field is more more wide than landwid electric field construction prospects, expect 2015, China's offshore wind farm adds up installation amount can reach 5,000,000 kilowatts, and year, steel using amount was more than 1,000,000 tons.
High-corrosion resistance is one of main performance requirements of this kind of Marine Engineering Steel, be in the environment such as salt fog, moisture and seawater for a long time due to marine steel structure, be subject to the erosion action of seawater and marine life and produce violent galvanic corrosion, easily there is violent saponification, aging in paint film, produce very serious structure erosion, not only reduce the mechanical property of structured material, shorten its work-ing life, and again because of away from seashore, can not keep in repair, maintain, so higher to the requirement of its corrosion resistance nature by regular carrying out as boats and ships.
Ocean environment is divided into marine atmosphere band, ocean splash(spray)zone, seawater tidal range band, water immersion band, ooze band, therefore the difference that marine steel is in mechanism of corrosion in different environment causes erosion rate also different, so also different to the requirement of its corrosion resistance nature, the solidity to corrosion impact of different element on steel is also different.
Red soil nickel ore also claims laterite to be the important source material extracted nickel metal or produce Rhometal, but due to laterite formed mechanism and condition caused by, there is nickel content greatly low in laterite, be less than 0.6%, the chromium of this type of ore deposit iron level about 50%, about the 1.5%-5% of association simultaneously, as for extract nickel metal or produce ferronickel, production cost is high, very uneconomical; And as common iron ore, its grade is low, the nickel of association, the feature of chromium element make again it can only add on a small quantity using cheap price as joining ore deposit simultaneously, therefore, this type of ore deposit is general all as barrow, go out novel, the atmospheric corrosion resistance of high-strength and low-cost and the low nickel chromium triangle structural steel of high added value of seawater corrosion resistance for this type of mine resource exploitation, have broad application prospects.
Summary of the invention
The object of the present invention is to provide a kind of atmosphere corrosion resistance structural steel of novel, high-strength and low-cost.
The technical scheme that a kind of atmosphere corrosion resistance structural steel of the present invention adopts is:
A kind of atmosphere corrosion resistance structural steel, consists of the following composition: C:0.06-0.10% by weight; Si:0.20-0.30%; Mn:0.20-0.90%; Cu:0.20-0.60%; V:0.03-0.06%; Mo :≤0.30%; RE :≤0.05%; Surplus is Fe and inevitable trace impurity.
Further, be grouped into by the one-tenth of following optimal proportion by weight: C:0.08%; Si:0.20%; Mn:0.70%; Cu:0.40%; V:0.05%; Mo:0.15%; RE:0.03%; Surplus is Fe and inevitable trace impurity.
Atmosphere corrosion resistance structural steel of the present invention, without the need to the alloy adding nickel or chromium special in preparation process, simplifies production technique, reduces production cost, improve the weather-resistant performance of shaped steel, have good economic benefit, social benefit and application prospect.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of atmosphere corrosion resistance structural steel, consists of the following composition: C:0.10% by weight; Si:0.20%; Mn:0.90%; Cu:0.20%; V:0.03%; Mo:0.10%; RE:0.02%; Surplus is Fe and inevitable trace impurity.
Production process is as follows:
(1) nickeliferous 1.0%, chromium 1.5%, iron 50% red soil nickel ore is selected, first through drying plant dry for standby;
(2) red soil nickel ore after oven dry and iron content 61% iron ore are sintered according to part by weight 5.0:5.0;
(3) agglomerate is carried out blast-furnace smelting, the molten iron obtained is nickeliferous 0.5%, chromium 0.7%;
(4) molten iron is added silicomanganese and VN alloy, and obtain molten steel by converter smelting, refining;
(5) molten steel is entered continuous casting, cast to obtain low alloy steel steel billet;
(6) the low alloy steel steel billet of gained is rolled the atmosphere corrosion resistance structural steel obtaining yield strength and be greater than 460MPa, specification HM300 × 200.
Embodiment 2 is optimum embodiment of the present invention
A kind of atmosphere corrosion resistance structural steel, consists of the following composition: C:0.08% by weight; Si:0.20%; Mn:0.70%; Cu:0.40%; V:0.05%; Mo:0.15%; RE:0.03%; Surplus is Fe and inevitable trace impurity.
Production process is as follows:
(1) nickeliferous 0.8%, chromium 1.5%, iron 50% red soil nickel ore is selected, first through drying plant dry for standby;
(2) red soil nickel ore after oven dry and iron content 61% iron ore are sintered according to part by weight 8.0:2.0;
(3) agglomerate is carried out blast-furnace smelting, the molten iron obtained is nickeliferous 0.6%, chromium 1.2%;
(4) molten iron is added silicomanganese and VN alloy, and obtain molten steel by converter smelting, refining;
(5) molten steel is entered continuous casting, cast to obtain low alloy steel steel billet;
(6) the low alloy steel steel billet of gained is rolled the atmosphere corrosion resistance structural steel obtaining yield strength and be greater than 345MPa, specification HM300 × 200.
Atmosphere corrosion resistance structural steel of the present invention is without the need to the alloy adding nickel or chromium special in preparation process, simplify production technique, reduce production cost, improve the weather-resistant performance of shaped steel, there is good economic benefit, social benefit and application prospect, although describe embodiments of the present invention above, those skilled in the art can make various distortion or amendment within the scope of the appended claims.
Claims (2)
1. an atmosphere corrosion resistance structural steel, is characterized in that, consists of the following composition by weight: C:0.06-0.10%; Si:0.20-0.30%; Mn:0.20-0.90%; Cu:0.20-0.60%; V:0.03-0.06%; Mo :≤0.30%; RE :≤0.05%; Surplus is Fe and inevitable trace impurity.
2. a kind of atmosphere corrosion resistance structural steel according to claim 1, is characterized in that, is grouped into by weight: C:0.08% by the one-tenth of following optimal proportion; Si:0.20%; Mn:0.70%; Cu:0.40%; V:0.05%; Mo:0.15%; RE:0.03%; Surplus is Fe and inevitable trace impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510286448.9A CN104846278A (en) | 2015-05-30 | 2015-05-30 | Atmospheric corrosion-resistant steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510286448.9A CN104846278A (en) | 2015-05-30 | 2015-05-30 | Atmospheric corrosion-resistant steel |
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| CN104846278A true CN104846278A (en) | 2015-08-19 |
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| CN201510286448.9A Pending CN104846278A (en) | 2015-05-30 | 2015-05-30 | Atmospheric corrosion-resistant steel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08193240A (en) * | 1994-11-18 | 1996-07-30 | Nippon Steel Corp | Steel material excellent in temper embrittlement resistance and its production |
| JP2005298900A (en) * | 2004-04-12 | 2005-10-27 | Nippon Steel Corp | Thick steel plate having excellent toughness in high heat input weld heat affected zone |
| CN1752260A (en) * | 2005-10-10 | 2006-03-29 | 燕山大学 | Hot-rolling double-phase weather-resistant steel plate and mfg. method thereof |
| CN101928886A (en) * | 2010-07-15 | 2010-12-29 | 南京钢铁股份有限公司 | Corrosion resistant steel for cargo oil tanks and application thereof |
-
2015
- 2015-05-30 CN CN201510286448.9A patent/CN104846278A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08193240A (en) * | 1994-11-18 | 1996-07-30 | Nippon Steel Corp | Steel material excellent in temper embrittlement resistance and its production |
| JP2005298900A (en) * | 2004-04-12 | 2005-10-27 | Nippon Steel Corp | Thick steel plate having excellent toughness in high heat input weld heat affected zone |
| CN1752260A (en) * | 2005-10-10 | 2006-03-29 | 燕山大学 | Hot-rolling double-phase weather-resistant steel plate and mfg. method thereof |
| CN101928886A (en) * | 2010-07-15 | 2010-12-29 | 南京钢铁股份有限公司 | Corrosion resistant steel for cargo oil tanks and application thereof |
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Application publication date: 20150819 |