CN103014552A - Novel corrosion-resisting special fastener - Google Patents
Novel corrosion-resisting special fastener Download PDFInfo
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- CN103014552A CN103014552A CN2011102825927A CN201110282592A CN103014552A CN 103014552 A CN103014552 A CN 103014552A CN 2011102825927 A CN2011102825927 A CN 2011102825927A CN 201110282592 A CN201110282592 A CN 201110282592A CN 103014552 A CN103014552 A CN 103014552A
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Abstract
The invention discloses a novel corrosion-resisting special fastener which comprises the components of, by mass, no more than 0.030% of C, no more than 1.00% of Si, no more than 2.00% of Mn, no more than 0.045% of P, no more than 0.030% of S, 15.5-20.5% of Cr, 11.3-15.8% of Ni, 1.55-2.25% of Cu, 3.20-5.80% of Mo, and balance of Fe and unavoidable impurities. The special fastener has the advantages of corrosion resistance, good ductility, excellent stress corrosion resistance, excellent compressive strength, and excellent high temperature resistance.
Description
Technical field
The present invention relates to technical field of fastening, relate in particular to a kind of novel corrosion resistant special fastener.
Background technology
In the prior art, with the fastening piece that conventional chromium-austenitic stainless steel is made such as 304 alloys, resistance to chemical attack is not strong, and with the fastening piece that conventional stainless steel is made, it can not adapt to job requirement under some special occasions.
Summary of the invention
It is not enough be to solve prior art, the invention provides the novel corrosion resistant special fastener of a kind of corrosion-resistant, good ductility, excellent anti-stress corrosion performance, compressive strength and resistance to elevated temperatures.
The present invention adopts following technical scheme: a kind of novel corrosion resistant special fastener, its composition quality per-cent is: C≤0.030, Si≤1.00, Mn≤2.00, P≤0.045, S≤0.030, Cr:15.5-20.5, Ni:11.3-15.8, Cu:1.55-2.25, Mo:3.20-5.80, surplus Fe and inevitable impurity.
It also comprises titanium elements, and its composition quality per-cent is Ti:0.90-1.53.
It also comprises aluminium element, and its composition quality per-cent is A1 :≤0.35.
Mentality of designing of the present invention is actually carbon drop, nickel, guarantees necessary chromium content, to guarantee its corrosion resistance nature and to reduce production costs; Add a certain amount of manganese, copper, silicon, molybdenum, with stabilizing tissue with improve performance;
Molybdenum (Mo): molybdenum can make the grain refining of steel, improves hardening capacity and thermostrength, keeps enough intensity and creep resisting abilities when high temperature.Add molybdenum in the steel, can not only improve mechanical property, can also suppress the fragility that steel alloy causes owing to fire.
Copper (Cu): can improve intensity and toughness, particularly the atomospheric corrosion performance.Shortcoming is that generation is hot-short easily when hot-work, and copper content surpasses 0.5% plasticity significantly to be reduced.When copper content less than 0.50% on weldability without impact.With the increase of Cu content, stainless germ resistance improves; Stainless hardness, intensity, plasticity and toughness also improve thereupon, play the effect of highly malleablized.
Chromium (Cr): chromium can significantly improve intensity, hardness and wear resistance, but reduces simultaneously plasticity and toughness.Chromium can improve again oxidation-resistance and the erosion resistance of steel, thereby is the important alloying element of stainless steel.What chromium had the greatest impact to performance of austenitic stainless steel is solidity to corrosion, is mainly manifested in chromium and improves the scale resistance medium of steel and the performance of acid chloride medium; Chromium also improves the anti-local corrosion of steel, such as the performance of stress corrosion under intergranular corrosion, pitting attack, crevice corrosion and some condition; Therefore the chromium content in the steel can not be excessively low, requires to be controlled between the 16-18 ﹪; The cooperation of chromium, copper and molybdenum makes stainless corrosion resisting property that great raising be arranged.
Nickel (Ni): nickel can improve the intensity of steel, and keeps good plasticity and toughness.Nickel has higher corrosion resistance to soda acid, at high temperature has antirust and temperature capacity.
Carbon (C) is strong formation and stable austenite and the element that enlarges the austenitic area.For stainless steel, carbon is a kind of harmful element, and this mainly is because under some conditions in stainless and anti-corrosion purposes, such as welding or the heating of 450-850 degree, chromium in carbon and the steel forms the carbide Cr23C6 of Gao Ge, and the corrosion resistance nature that makes steel is the intergranular corrosion resistance degradation particularly; Therefore when design mix, all the time reducing carbon content as the important indicator of weighing its corrosion resistance nature quality, so control carbon is in≤0.030 ﹪ scope.
The adding of silicon (Si) element has deoxidation effect, when silicon exists with the form of solid solution attitude, he can improve the yield strength of matrix, but the ductile-brittle transition temperature of material is improved, can form fine and close SiO2 film on the surface of steel simultaneously, hindered acid further corrodes to steel is inner, and is particularly effective to improving the solidity to corrosion of steel in high density nitric acid, the too high stiffness distortion difficulty that makes of silicon content.So its content is pressed≤1 ﹪ scope control.
Manganese (Mn) is weak formation austenite element, but has the effect of strong stable austenite;
The effect of aluminium (A1) in austenitic stainless steel improves stainless corrosion resistance nature, improves steel toughness, oxidation-resistance at low temperatures.
Titanium is as the element of carbon in the stabilized steel, and preferential the combination with carbon forms TiC, reduces the formation of M23C6, reaches the purpose that prevents Sensitized Intergranular Corrosion; Intermetallic phase can be formed in the titanium steel, stainless intensity can be improved.
The present invention compared with prior art has the advantage of anti-stress corrosion performance, compressive strength and the resistance to elevated temperatures of corrosion-resistant, good ductility, excellence.
Embodiment
Embodiment one:
A kind of novel corrosion resistant special fastener, its composition quality per-cent is: C:0.030, Si:1.00, Mn:2.00, P:0.045, S:0.030, Cr:15.5, Ni:11.8, Cu:2.11, Mo:5.13, Ti:1.04, A1:0.35, surplus Fe and inevitable impurity.
Embodiment two:
A kind of novel corrosion resistant special fastener, its composition quality per-cent is: C:0.025, Si:0.80, Mn:1.75, P:0.035, S:0.020, Cr:17.5, Ni:13.8, Cu:2.05, Mo:3.88, Ti:1.08, A1:0.25, surplus Fe and inevitable impurity.
Embodiment three:
A kind of novel corrosion resistant special fastener, its composition quality per-cent is: C:0.015, Si:0.90, Mn:1.00, P:0.025, S:0.010, Cr:19.5, Ni:15.8, Cu:1.55, Mo:3.70, Ti:1.03, A1:0.25, surplus Fe and inevitable impurity.
Embodiment four:
A kind of novel corrosion resistant special fastener, its composition quality per-cent is: C:0.010, Si:0.50, Mn:1.10, P:0.015, S:0.020, Cr:18.5, Ni:14.3, Cu:1.57, Mo:4.24, Ti:0.99, A1:0.35, surplus Fe and inevitable impurity.
Embodiment five:
A kind of novel corrosion resistant special fastener, its composition quality per-cent is: C:0.020, Si:1.00, Mn:1.00, P:0.025, S:0.020, Cr:20.1, Ni:11.6, Cu:2.15, Mo:4.73, Ti:1.33, A1:0.25, surplus Fe and inevitable impurity.
More than describe embodiments of the present invention in detail, but this example of just lifting for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally, any person of ordinary skill in the field all can according to the description of technical scheme of the present invention and preferred embodiment thereof, make various possible being equal to and change or replacement, but all these changes or replacement all should belong to the protection domain of claim of the present invention.
Claims (3)
1. novel corrosion resistant special fastener, its composition quality per-cent is: C≤0.030, Si≤1.00, Mn≤2.00, P≤0.045, S≤0.030, Cr:15.5-20.5, Ni:11.3-15.8, Cu:1.55-2.25, Mo:3.20-5.80, surplus Fe and inevitable impurity.
2. a kind of novel corrosion resistant special fastener according to claim 1, it is characterized in that: it also comprises titanium elements, its composition quality per-cent is Ti:0.90-1.53.
3. a kind of novel corrosion resistant special fastener according to claim 1, it is characterized in that: it also comprises aluminium element, its composition quality per-cent is A1 :≤0.35.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102825927A CN103014552A (en) | 2011-09-22 | 2011-09-22 | Novel corrosion-resisting special fastener |
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| CN2011102825927A CN103014552A (en) | 2011-09-22 | 2011-09-22 | Novel corrosion-resisting special fastener |
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| CN103014552A true CN103014552A (en) | 2013-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107523760A (en) * | 2017-08-25 | 2017-12-29 | 张家港浦项不锈钢有限公司 | A kind of stainless steel of anti-printing and dyeing corrosion and its manufacture method and application |
| CN110438511A (en) * | 2019-09-19 | 2019-11-12 | 奥展实业有限公司 | A kind of rust-proofing method of stainless steel support |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07268455A (en) * | 1994-03-29 | 1995-10-17 | Nippon Steel Corp | Production of cr-ni stainless alloy free from microracking in hot rolling |
| CN1148635A (en) * | 1995-10-25 | 1997-04-30 | 刘平清 | High corrosion-resisting austenite stainless steel |
| CN1974829A (en) * | 2006-12-19 | 2007-06-06 | 钢铁研究总院 | Low magnetism steel resisting sea water corrosion |
| CN101781741A (en) * | 2009-01-21 | 2010-07-21 | 江苏申源特钢有限公司 | Nickel-saving alloy material for gas valve |
-
2011
- 2011-09-22 CN CN2011102825927A patent/CN103014552A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07268455A (en) * | 1994-03-29 | 1995-10-17 | Nippon Steel Corp | Production of cr-ni stainless alloy free from microracking in hot rolling |
| CN1148635A (en) * | 1995-10-25 | 1997-04-30 | 刘平清 | High corrosion-resisting austenite stainless steel |
| CN1974829A (en) * | 2006-12-19 | 2007-06-06 | 钢铁研究总院 | Low magnetism steel resisting sea water corrosion |
| CN101781741A (en) * | 2009-01-21 | 2010-07-21 | 江苏申源特钢有限公司 | Nickel-saving alloy material for gas valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107523760A (en) * | 2017-08-25 | 2017-12-29 | 张家港浦项不锈钢有限公司 | A kind of stainless steel of anti-printing and dyeing corrosion and its manufacture method and application |
| CN107523760B (en) * | 2017-08-25 | 2020-06-30 | 浦项(张家港)不锈钢股份有限公司 | Printing and dyeing liquid corrosion resistant stainless steel and manufacturing method and application thereof |
| CN110438511A (en) * | 2019-09-19 | 2019-11-12 | 奥展实业有限公司 | A kind of rust-proofing method of stainless steel support |
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Application publication date: 20130403 |