CN1109772C - Anti-atmosphere corrosion steel - Google Patents
Anti-atmosphere corrosion steel Download PDFInfo
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- CN1109772C CN1109772C CN00121262A CN00121262A CN1109772C CN 1109772 C CN1109772 C CN 1109772C CN 00121262 A CN00121262 A CN 00121262A CN 00121262 A CN00121262 A CN 00121262A CN 1109772 C CN1109772 C CN 1109772C
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Abstract
The present invention relates to steel grade resisting atmosphere corrosion which belongs to the alloy steel field. The steel resisting atmosphere corrosion has the chemical compositions of 0.085 to 0.15 wt% of C, 0.30 to 0.50 wt% of Si, 0.03 to 0.60 wt%of Mn, 0.035 to 0.050 wt% of P, less than 0.01 wt% of S, 0.1 to 0.19 wt% of Cu, 0.005 to 0.05 wt% of RE, and Fe as the rest. The present invention has the advantages of simple chemical components, stable production process, low cost and good atmosphere corrosion resistance.
Description
The invention belongs to field of alloy steel, relate to weather resisting steel.
Usually, having the carbon steel and the low alloy steel of good mechanism performance and lower price, be the structured material of using always, but these steel produces corrosion in atmospheric environment.For this reason, people have successively carried out the research of the steel of Weather-resistant low alloy.
In existing Weather-resistant low alloy steel, most typical have Cor-TenA series that high phosphorus, copper adds nickel, chromium and turn to main Cor-TenB series with the chromium mauganin.(weight %) is as follows for the main component of Cor-TenA series: C≤0.12%, and Mn 0.2-0.5%, Si 0.25-0.75%, Cu 0.25-0.60%, S≤0.04%, P 0.07-0.15%, Cr 0.3-1.25%, Ni≤0.6 5%, surplus is Fe.Yield strength 〉=the 345N/mm of this steel
2, tensile strength 〉=490N/mm
2Application number also provides a kind of weather resisting steel for the application for a patent for invention of 85108118A.
Above-mentioned steel grade, owing to have high phosphorus, copper content, and contain chromium, nickel alloy element, improved the ability of atmospheric corrosion resistance, but high phosphorus also having brought low temperature brittleness simultaneously, high-copper has brought hot rolling be full of cracks and bending cracks etc., and promptly plasticity, toughness descend; In addition, under the alloy content condition with higher, in order to guarantee to prolong plasticity and the required carbon equivalent of welding property, carbon content need be controlled at below 0.12%, and this has brought difficulty to steel-making; Because alloy total amount height, phosphorus content and carbon content are low, and the price of steel is improved.And high phosphorus pollutes steel melting furnace, and is unfavorable to smelting other steel grade.Cor-TenB series, alloy content is also more than 2%, the cost height, and plasticity descends, and atmospheric corrosion resistance is not as good as Cor-TenA series.
The object of the present invention is to provide a kind of alloying element simple, stable processing technique, cost is low, and the weather resisting steel of atmospheric corrosion resistance excellence.
At above-mentioned purpose, the technical solution adopted in the present invention is that (carbon structural steel chemical ingredients (weight %) is: P≤0.045% on the basis of carbon structural steel chemical ingredients, S≤0.045%, Cu≤0.3%, Si 0.12-0.30%, Mn 0.30-0.60%), the upper limit of reduction S content, improve the lower limit of P, Cu, Si content, and add rare earth elements RE.Concrete chemical ingredients of the present invention (weight %) is C0.085-0.15%, Si 0.30-0.50%, and Mn 0.30-0.60%, P 0.035-0.050%, S≤0.01%, Cu 0.1-0.19%, RE 0.005-0.05%, surplus is Fe.
The present invention reduces the upper limit of sulphur content, improves the lower limit of phosphorus, copper, silicone content on a small quantity, is based on following principle:
Atomospheric corrosion is the electrochemical corrosion course under the thin liquid film.Sulfide inclusion can become the anode of the microbattery in the galvanic corrosion in the steel, quickens the process of atomospheric corrosion.Reduce the upper limit of sulphur content, reduce the content of sulfide inclusion in the steel, thereby reduce the microbattery anode, thereby improve the ability of the atmospheric corrosion resistance of steel.
Copper, silicon, phosphorus can enrichments in interior rusty scale in the atomospheric corrosion process of steel, and produce the colloidality mixture of copper, silicon, phosphorus, rusty scale densification in making, thus stop corrosive to carry out, improve the resistance to atmospheric corrosion of steel.A small amount of lower limit that improves phosphorus, copper, silicone content, make full use of on the one hand the effect that phosphorus, copper, silicon improve the resistance to atmospheric corrosion of steel, overcome traditional atmospheric corrosion resistance simultaneously and crossed low temperature brittleness that high phosphorus, copper content bring, welding fragility, hot rolling be full of cracks defective etc.
The main effect that adds RE is cleaning molten steel and control inclusion morphology, makes it nodularization, thereby improves the plasticity and toughness and the corrosion resisting property of steel.
Compare with existing weather resisting steel, the present invention has following advantage:
(1), chemical ingredients of the present invention is simple, so technology is easy to stablize, by the control raw material sources, need not additionally add alloying element, just can obtain the approaching carbon steel of atmospheric corrosion resistance and Cor-TenA.Its cost is the straight carbon steel level only, and promptly cost is low, the atmospheric corrosion resistance excellence.
(2), production technique is simple, easy handling control, thereby not only cost is low, and production efficiency height, qualification rate height.
(3), since chemical ingredients simple, raw material sources are wide, also impel to reduce cost.
The chemical ingredients scope of weather resisting steel has been smelted a few stove steel according to the present invention, rolls into sheet material.And mechanical property test and weather exposure test have been carried out in sampling respectively.Its mechanical property satisfies standard-required; The atmospheric exposure corrosion test be in the harsh Qingdao of corrosive environment, 3 testing stations in Jiangjin and Wanning carry out, and have carried out the exposure test in 4 years altogether.Meanwhile, also take two contrast ordinary steel Q235 steel and carried out exposure test together.Test-results shows that the corrosion rate of steel of the present invention not only is lower than the corrosion rate of compared steel significantly, also is lower than the corrosion rate of the economic anti-Hou Gang that does not add rare earth.
Claims (1)
1, a kind of weather resisting steel is characterized in that its chemical ingredients (weight %) is: C0.085-0.15%, Si 0.30-0.50%, Mn 0.30-0.60%, P 0.035-0.050%, S≤0.01%, Cu 0.1-0.19%, RE 0.005-0.05%, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00121262A CN1109772C (en) | 2000-08-11 | 2000-08-11 | Anti-atmosphere corrosion steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00121262A CN1109772C (en) | 2000-08-11 | 2000-08-11 | Anti-atmosphere corrosion steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1280207A CN1280207A (en) | 2001-01-17 |
| CN1109772C true CN1109772C (en) | 2003-05-28 |
Family
ID=4588688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00121262A Expired - Fee Related CN1109772C (en) | 2000-08-11 | 2000-08-11 | Anti-atmosphere corrosion steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1109772C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342051C (en) * | 2005-01-07 | 2007-10-10 | 中国科学院金属研究所 | Economy type weathering-resistant steel |
| CN100480413C (en) * | 2007-09-12 | 2009-04-22 | 钢铁研究总院 | Air corrosion resistant steel |
| CN101845584B (en) * | 2010-04-09 | 2012-07-25 | 武汉钢铁(集团)公司 | Fresh-water corrosion resistant steel for U-shaped steel sheet pile and method for producing same |
| MX2015014136A (en) * | 2013-04-09 | 2015-12-15 | Ykk Corp | Alloy for slide fastener member and slide fastener member. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5045279A (en) * | 1989-06-01 | 1991-09-03 | Queiroz Pinto Jose A De | Corrosion-resistant carbon steel with good drawability characteristics |
-
2000
- 2000-08-11 CN CN00121262A patent/CN1109772C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5045279A (en) * | 1989-06-01 | 1991-09-03 | Queiroz Pinto Jose A De | Corrosion-resistant carbon steel with good drawability characteristics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1280207A (en) | 2001-01-17 |
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Owner name: QINGDAO NCS TESTING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: INST OF IRON + STEEL Effective date: 20121112 |
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Free format text: CORRECT: ADDRESS; FROM: 100081 HAIDIAN, BEIJING TO: 266000 QINGDAO, SHANDONG PROVINCE |
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Effective date of registration: 20121112 Address after: 266000 entrepreneurship center of hi tech Development Zone, Shandong, Qingdao province 143-A Patentee after: Qingdao CISRI Nanogram Detection Protection Technology Co., Ltd. Address before: 100081 No. 76 South College Road, Beijing Patentee before: Central Iron & Steel Research Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030528 Termination date: 20150811 |
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