CN106319349A - Alloy structural steel for pre-stressed anchorage device - Google Patents
Alloy structural steel for pre-stressed anchorage device Download PDFInfo
- Publication number
- CN106319349A CN106319349A CN201610968761.5A CN201610968761A CN106319349A CN 106319349 A CN106319349 A CN 106319349A CN 201610968761 A CN201610968761 A CN 201610968761A CN 106319349 A CN106319349 A CN 106319349A
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- CN
- China
- Prior art keywords
- steel
- structural steel
- alloy structural
- prestressed anchor
- anchorage device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Abstract
The invention provides alloy structural steel for a pre-stressed anchorage device. The alloy structural steel comprises the following components by weight percent: 0.37-0.44% of C, 0.17-0.37% of Si, 0.50-0.80% of Mn, 0.005-0.025% of P, 0.005-0.010% of S, 0.80-1.10% of Cr, 0.000-0.005% of Ca, 0.015-0.035% of Als, 0.0010-0.0020% of O and the balance of Fe and inevitable impurities. Compared with the prior art, the alloy structural steel has the advantages that the percentage of all elements is controlled; the alloy structural steel for the pre-stressed anchorage device provided by the invention can overcome the defect of difficulty in processing of the present 40Cr extra high-quality anchorage device; the efficiency of machining including sawing and drilling can be increased by 20% or above, so that the production cost is lowered.
Description
Technical field
The invention belongs to architectural engineering steel, be specifically related to a kind of prestressed anchor structural alloy steel.
Background technology
Prestressed anchor is permanent anchor used in prestressing force coagulates soil, is at post stretching structure or component
In, for keeping the pulling force of presstressed reinforcing steel and passing it to the anchoring instrument of inside concrete, it is widely used in highway bridge, ferrum
The anchoring of road and bridge beam, city intersection, urban light rail, skyscraper, water conservancy and hydropower dam, harbour anchorage harbour, rock mass bank protection, basis
Reinforce, anchor top, prestressed space grids, subway, large-scale office building, auditoriums, hotels, warehouse Factory Building, point building, heavy lift, cunning are pushed up in ore deposit, tunnel
Intermembranous propelling of having a rest, bridge tunnel pushing tow, tun and boats and ships, sleeper, replacing bridge pad, bridge and building strengthening, bar bender
Journey, antimagnetic and antiseptic project (fiber anchorage), carbon fiber reinforcement, first open Liang Chang construction, external prestressing engineering, suspension cable, outstanding
Rope etc..
The use of prestressed anchor is in bad condition, and the requirement to its quality is the highest, it is desirable to it has good intensity, hard
Degree, plasticity, toughness, anti-fatigue performance, and require that its quality stability is good, safety is high.Simultaneously as its to be consumption big,
Use wide, the consumable accessory of periodic replacement, it requires that its manufacturing process is simple, production cost is low.
At present, the ore deposit anchor anchor ring in prestressed anchor and low retraction anchorage anchor slab, instrument anchor slab etc. typically use 40Cr steel
Making, in standard GB/T/T3077-1999 " structural alloy steel technical conditions ", the component requirements of 40Cr superfine high-quality steel is (weight
Percentage ratio): C 0.37-0.44%, Si 0.17-0.37%, Mn 0.50-0.80%, P≤0.025%, S≤0.015%, Cr
0.80-1.10%, Ni≤0.30%, Cu≤0.25%, Mo≤0.10%.
But, current prestressed anchor 40Cr superfine high-quality steel is primarily present problem and is: for the field trash controlled, past
In steel, P content the lowest (P≤0.009%) is practically free of S (S≤0.0003%), causes the machinings such as steel sawing, boring
Highly difficult, and too much increase S content and can increase inclusion content, reduce the plasticity of steel, toughness, anti-fatigue performance.
Summary of the invention
It is an object of the invention to provide a kind of prestressed anchor structural alloy steel, can be used for manufacturing in prestressed anchor
Ore deposit anchor anchor ring and low retraction anchorage anchor slab, instrument anchor slab etc., overcome existing 40Cr superfine high-quality anchorage steel unmanageable lack
Point, reduce production cost.
A kind of prestressed anchor structural alloy steel that the present invention provides, containing the composition of following percentage by weight:
C 0.37-0.44%, Si 0.17-0.37%, Mn 0.50-0.80%, P 0.005-0.025%, S 0.005-
0.010%, Cr 0.80-1.10%, Ca 0.000-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Preferably, described prestressed anchor structural alloy steel, containing the composition of following percentage by weight:
C 0.37-0.44%, Si 0.20-0.28%, Mn 0.60-0.75%, P 0.010-0.025%, S 0.005-
0.010%, Cr 0.85-1.05%, Ca 0.001-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Preferably, described prestressed anchor structural alloy steel, containing the composition of following percentage by weight:
C 0.37-0.44%, Si 0.20-0.28%, Mn 0.60-0.75%, P 0.018-0.025%, S 0.006-
0.009%, Cr 0.85-1.05%, Ca 0.002-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Preferably, described prestressed anchor structural alloy steel, containing the composition of following percentage by weight:
C 0.37-0.44%, Si 0.22-0.27%, Mn 0.65-0.73%, P 0.020-0.025%, S 0.0060-
0.009%, Cr 0.85-1.05%, Ca 0.002-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
In the present invention, acting as of each element:
Carbon is to improve quenching degree and the rigid important element of through hardening in steel, and it is 0.37-that the present invention controls carbon content scope
0.44%, too low, intensity and hardness can be reduced, too high, plasticity and toughness can be reduced, increase workpiece quenching tearing tendency.
Silicon in steel of the present invention not as main alloy element, as reducing agent necessary during steel-making and deoxidizer, this
Bright middle control silicone content scope is 0.17-0.37%.
Manganese and chromium are the most all the important elements improving quenching degree, and it is 0.5 0-0.80% that the present invention controls Fe content scope,
It is 0.80-1.10% that the present invention controls chromium content range.According to the purposes of steel, appropriate manganese and chromium for improve quenching degree be must
Want, but too high manganese and chromium not only can increase the cost of steel, and finished product can be reduced while dramatically increasing intensity
Mould, toughness, increase hardening break tendency.
Sulfur forms manganese sulfide inclusion with manganese and ferrum in steel, and this type impurity can interrupt the seriality of parent metal, is cutting
Promote chip breaking to form little and short crimp radius when cutting, and be prone to get rid of, reduce tool wear, reduce machined surface roughness,
Improve cutter life.Generally the machinability of steel is with the increasing and increase of sulfur content in steel.But the mechanics of the vertical and horizontal of steel
Performance difference is big, laterally moulds, poor toughness, and tired and corrosion resisting property also decreases.The present invention controls sulfur content scope
0.005-0.010%.
Phosphorus is solid-solution in ferrite and can improve hardness and intensity, reduces toughness, makes chip be prone to fracture and get rid of, thus obtain
Obtain machined surface roughness well, but the too high meeting of phosphorus content significantly reduces plasticity, improve hardness, on the contrary the machinability of steel is risen
Illeffects.Suitably phosphorus content scope is 0.005-0.025%.
In steel, calcium is combined the composite oxides (mainly CaO Al2O3 SiO2) forming low melting point with aluminum, silicon, at a high speed
During cutting, calcium system oxide is attached to cutting element surface and plays lubrication and antifriction function, thus improves cutting-tool's used life.As
Fruit sulfur-bearing, lead and other elements simultaneously, their compound action can make cutting effect more preferable.Therefore, the present invention controls Si0.17-
0.37%, Ca 0.000-0.005%, Als (dissolved aluminum) 0.015-0.035%.
Oxygen is that the oxygen in steel is the most harmful in steel, and too high oxygen can increase the amount of field trash, reduce the mechanics of steel
Performance, but appropriate oxygen can make sulfide in steel be spindle distribution, improves the machinability of steel.Suitably oxygen content scope is
0.0010-0.0020%.
Compared with prior art, the present invention controls the percentage ratio of each element, it is provided that prestressed anchor structural alloy steel
Overcome the existing 40Cr superfine high-quality unmanageable shortcoming of anchorage steel.Can improve the machining efficiency such as sawing, boring 20% with
On, thus reduce production cost.
Detailed description of the invention
Embodiment 1
Technical scheme is further illustrated below in conjunction with embodiment.
The chemical composition of embodiment 1-5 and comparative example 1-2 is shown in Table 1, and (heat analysis, remaining is Fe and inevitable impurity
Element)
Table 1
Embodiment 1-5 is shown in Table 2 with mechanical property and the machining time of comparative example 1-2, and in table 2, data are statistics
Meansigma methods.
Mechanical property test is pressed the Technology for Heating Processing of GB/T3077-1999 recommendation and is processed and check by this standard-required.
Steel plate sawing round steel a size of Φ 165mm embodiment 1-5 manufactured with comparative example 1-2, finished product is the 8 low retractions in hole
Anchorage anchor slab, sawing and boring use the contrast of same machined parameters to carry out respectively on same a machine tool, by can steady production
Maximum process velocity processing, has relatively meaning.The saving time refers to that relative contrast's example 1 saves percentage of time.
Table 2
Embodiment 1-5 compares visible with comparative example 1 respectively, and embodiment 1-5 can save process time more than 20%.
Embodiment 1-5 compares visible with comparative example 2 respectively, and embodiment 1-5 plasticity and toughness are substantially preferable, and also can be obvious
Save process time.
Claims (4)
1. a prestressed anchor structural alloy steel, it is characterised in that described prestressed anchor structural alloy steel contain with
The composition of lower percentage by weight:
C 0.37-0.44%, Si 0.17-0.37%, Mn 0.50-0.80%, P 0.005-0.025%, S 0.005-
0.010%, Cr 0.80-1.10%, Ca 0.000-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Prestressed anchor structural alloy steel the most according to claim 1, it is characterised in that described prestressed anchor closes
Gold structural steel contains the composition of following percentage by weight:
C 0.37-0.44%, Si 0.20-0.28%, Mn 0.60-0.75%, P 0.010-0.025%, S 0.005-
0.010%, Cr 0.85-1.05%, Ca 0.001-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Prestressed anchor structural alloy steel the most according to claim 1, it is characterised in that described prestressed anchor closes
Gold structural steel contains the composition of following percentage by weight:
C 0.37-0.44%, Si 0.20-0.28%, Mn 0.60-0.75%, P 0.018-0.025%, S 0.006-
0.009%, Cr 0.85-1.05%, Ca 0.002-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Prestressed anchor structural alloy steel the most according to claim 1, it is characterised in that described prestressed anchor closes
Gold structural steel contains the composition of following percentage by weight:
C 0.37-0.44%, Si 0.22-0.27%, Mn 0.65-0.73%, P 0.020-0.025%, S 0.0060-
0.009%, Cr 0.85-1.05%, Ca 0.002-0.005%, Als 0.015-0.035%, O 0.0010-0.0020%,
Remaining is Fe and inevitable impurity element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610968761.5A CN106319349A (en) | 2016-10-27 | 2016-10-27 | Alloy structural steel for pre-stressed anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610968761.5A CN106319349A (en) | 2016-10-27 | 2016-10-27 | Alloy structural steel for pre-stressed anchorage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106319349A true CN106319349A (en) | 2017-01-11 |
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ID=57816548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610968761.5A Pending CN106319349A (en) | 2016-10-27 | 2016-10-27 | Alloy structural steel for pre-stressed anchorage device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608758A (en) * | 2004-11-22 | 2005-04-27 | 宝钢集团上海五钢有限公司 | Hot continuous rolling process of high-sulfur (sulfur-phosphorus) free cutting structural steel |
| CN101925687A (en) * | 2008-01-28 | 2010-12-22 | 株式会社神户制钢所 | Steel for machine structural use with excellent machinability |
| CN103014517A (en) * | 2013-01-11 | 2013-04-03 | 方大特钢科技股份有限公司 | Multicomponent alloy integrated spring flat steel |
| CN105567899A (en) * | 2016-01-11 | 2016-05-11 | 中天钢铁集团有限公司 | Smelting method for improving cutting performance of round steel for machinery |
-
2016
- 2016-10-27 CN CN201610968761.5A patent/CN106319349A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608758A (en) * | 2004-11-22 | 2005-04-27 | 宝钢集团上海五钢有限公司 | Hot continuous rolling process of high-sulfur (sulfur-phosphorus) free cutting structural steel |
| CN101925687A (en) * | 2008-01-28 | 2010-12-22 | 株式会社神户制钢所 | Steel for machine structural use with excellent machinability |
| CN103014517A (en) * | 2013-01-11 | 2013-04-03 | 方大特钢科技股份有限公司 | Multicomponent alloy integrated spring flat steel |
| CN105567899A (en) * | 2016-01-11 | 2016-05-11 | 中天钢铁集团有限公司 | Smelting method for improving cutting performance of round steel for machinery |
Non-Patent Citations (3)
| Title |
|---|
| 中国国家标准化管理委员会: "《中华人民共和国国家标准》", 10 December 2015 * |
| 蔡淑卿等: "非金属夹杂物对钙系与钙硫系易切削钢切削性能的影响", 《钢铁研究学报》 * |
| 袁武华等: "国内外易切削钢的研究现状和前景", 《钢铁研究》 * |
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Application publication date: 20170111 |
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