CN101845600A - High temperature-resistant and acid corrosion-resistant stainless steel and preparation method thereof - Google Patents
High temperature-resistant and acid corrosion-resistant stainless steel and preparation method thereof Download PDFInfo
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- CN101845600A CN101845600A CN200910010853A CN200910010853A CN101845600A CN 101845600 A CN101845600 A CN 101845600A CN 200910010853 A CN200910010853 A CN 200910010853A CN 200910010853 A CN200910010853 A CN 200910010853A CN 101845600 A CN101845600 A CN 101845600A
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Abstract
The invention provides high temperature-resistant and acid corrosion-resistant stainless steel and a preparation method thereof. The stainless steel comprises the following components in percentage by weight: 0.001 to 0.04 percent of carbon, 2.0 to 9.0 percent of silicon, 0.001 to 0.03 percent of sulfur, 0.001 to 0.03 percent of phosphorus, 18.0 to 35.0 percent of chrome, 25.0 to 45.0 percent of nickel, 2.0 to 5.0 percent of molybdenum, 1.0 to 4.0 percent of copper, 0.5 to 1.0 percent of manganese, 0.2 to 0.5 percent of trace elements and the balance of iron. The preparation method for the stainless steel comprises the following steps of: smelting the components by using a medium-frequency induction coreless furnace; casting by using a sand mould or a metal mould; and preserving heat of the cast product in a cavity. The stainless steel material has resistance to oxidization and reduction in sulfuric acid media at different concentrations, and also has good rigidity and hot and cold workabilities.
Description
Technical field
The present invention relates to the stainless steel of acid corrosion-resistant, stainless steel of a kind of high temperature-resistant and acid corrosion-resistant and preparation method thereof is provided especially.
Background technology
As everyone knows, sulfuric acid has very strong corrodibility, and very complicated to corrosion of metal process and influence factor.The development of sulfuric acid industry and related industries thereof proposes more and more higher requirement to stainless steel.
Silicon (Si) is one of main non-corrosive metal element, and application is all arranged in stainless steel, low alloy steel, nickel-base alloy and even cast iron.Silicon has following advantage as alloy element: can improve the stainless steel corrosion cracking of anti-chloride stress cracking performance, anti-spot corrosion and crevice corrosion behavior and sea water corrosion resistant; The corrosive nature of stainless steel powerful oxidation corrosion resistance medium (as nitric acid, high-temperature concentrated sulfuric acid) can be improved, and stainless high temperature oxidation resistance can be improved.
Silicon is again one of the most cheap alloy element that is easy to get simultaneously, so high silicon stainless steel can be rated as inexpensive new steel grade, causes the concern of the vast investigation of materials personnel and the department of use always.Because various reasons such as over-all properties and manufacturing process, the silicone content in traditional high silicon stainless steel is limited in 3%～4%Si more.Use for reference former Soviet Union steel grade and the GH-2 (1Cr19Ni11Si4AlTi) that develops as China, this stainless steel can be used for the strong oxidizing property medium.So-called C4 steel (00Cr14Ni14Si4) is still arranged in addition, and this is the nitric acid stainless steel of China's classics.
The eighties, more external companies broke through the limitation of silicone content≤4%Si, and the most representative have the Saramet of Canadian Chemetics company exploitation and a SandvSX of Sweden Sandvik company exploitation.The corrosion resisting property of Saramet in the vitriol oil is less than 0.1g/m
2H, the corrosion resisting property of Sandvik SX in the vitriol oil is less than 0.1g/m
2H.
SandvikSX is a utmost point excellent high-temperature vitriol oil stainless steel, in the sulfuric acid of concentration＞80%, corrosion resisting property is higher than every other stainless steel, corrosion resisting property even be higher than traditional abros HastelloyC and Lewmet in 98% vitriol oil, and use temperature can be up to 150 ℃.Sandvik SX not only corrosion resisting property is good, and has the favorable mechanical performance.
Be to adapt to the development of China's sulfuric acid industry, Metal Corrosion and Protection Inst., Chinese Academy of Sciences in development research at the beginning of the nineties new-type high silicon stainless steel FS-1.This stainless steel is the Austenitic PH Stainless Steel, is mainly used to replace expensive Lewmet alloy to make the high-temperature concentrated sulfuric acid pump.This institute also developed the DS-1 high-silicon austenite stainless steel and the FS-1 sulfuric acid resistant stainless steel is applied in the high-temperature high concentration sulfuric acid medium in recent years.
Being fit at high temperature use under the vitriol oil condition from the above as can be seen die of pertinent literature, is that 50%-70% sulfuric acid, temperature are that corrosion rate can not satisfy corrosion-resistant requirement under the 80-120 ℃ of condition in working conditions still.
This shows that the present technique field presses for the attrition resistant stainless steel of a kind of high temperature-resistant and acid corrosion-resistant.
Summary of the invention
The purpose of this invention is to provide stainless steel of a kind of high temperature-resistant and acid corrosion-resistant and preparation method thereof, this stainless steel contains the solid particulate crystallisate, has fabulous acid corrosion-resistant and wear resistance in various acidic mediums.
The invention provides a kind of stainless steel of high temperature-resistant and acid corrosion-resistant, this stainless steel composition contains iron, carbon, silicon, copper, sulphur, phosphorus, chromium, nickel, molybdenum, manganese, trace element; The weight percent of each composition is: carbon 0.001-0.04%, silicon 2.0-9.0%, sulphur 0.001-0.03%, phosphorus 0.001-0.03%, chromium 18.0-35.0%, nickel 25.0-45.0%, molybdenum 2.0-5.0%, copper 1.0-4.0%, manganese 0.5-1.0%, micro-0.2-0.5%, iron are surplus.
The stainless steel of high temperature-resistant and acid corrosion-resistant provided by the invention, described trace element is preferably rare earth element.
The stainless steel of high temperature-resistant and acid corrosion-resistant provided by the invention, the weight percent of carbon chromium nisiloy molybdenum copper manganese composition is preferably in the described stainless steel: carbon 0.03%, silicon 5.0%, manganese 0.8%, chromium 25.0%, nickel 36.0%, molybdenum 3.6%, copper 1.5%.
The present invention also provides this stainless preparation method, uses antivacuum medium-frequency induction furnace to smelt, and with sand mold or permanent mold casting, progressively is warmed up at least 1600 ℃ in the smelting process, and the time is 2.5-3.0 hour, and casting back foundry goods is incubated at least 2 days in die cavity.
The present invention adopts chromium nisiloy molybdenum copper manganese to be equipped with the suitable proportion alloying by a kind of brand-new prescription, adds rare earth element again and carries out the microalloy modification, thereby reach the attrition resistant requirement of high temperature-resistant and acid corrosion-resistant.
Cr is the most basic alloying element that stainless steel obtains corrosion resistance nature, Cr thermodynamic property instability, but passivation easily.In the low-alloy scope, steel is had very big strengthening effect, improve intensity, hardness and wear resistance, reduce the critical cooling velocity of steel, improve the hardening capacity of steel, improve the thermotolerance of steel; In the high alloy scope, make steel have corrosion resistance to corrosive mediums such as strong oxidizing property acids.
Ni is the thermodynamic instability element, its passivation ability greater than iron less than chromium.It has the intensity that improves steel, improves the low-temperature flexibility of steel and does not reduce its plasticity; Reduce the critical cooling velocity of steel, improve the hardening capacity of steel; Enlarging the austenitic area, is the effective element of austenitizing.
Si improves solidity to corrosion and the passive film stability most important element one of of steel in high temperature sulfuric acid, it can reinforced ferrite, improves the intensity and the hardness of steel, reduces the critical cooling velocity of steel, improve the hardening capacity of steel, improve solidity to corrosion and the thermotolerance of steel in the oxidisability corrosive medium.
Mo is stainless steel and various non-corrosive metal alloy element commonly used, has reinforced ferrite, improves the intensity and the hardness of steel, reduces the critical cooling velocity of steel, improves the hardening capacity of steel, improves the thermotolerance of steel and the effect of hot strength; And can effectively suppress the spot corrosion that chlorion causes.
Cu also is one of stainless steel alloying element commonly used, and it can improve sulfuric acid corrosion resistant, and its electropotential can suppress the evolution reaction of hydrogen than H height.Cu and Mo are used the reduction of dissolved of passive film always.
Mn is substituting in the element adding stainless steel as nickel.The someone has carried out replacing nickel with N, Mn very early, obtains the research of single-phase austenitic stainless steel, and has obtained success, has reduced stainless cost.The effect of manganese does not lie in the formation austenite, but it reduces the critical quenching rate of steel, increases austenitic stability when cooling, suppresses austenitic decomposition, makes the austenite under the high temperature remain to normal temperature.
The form and the deoxidization desulfuration of rare earth element major control sulfide improve the mechanical property of steel and play the microalloying effect.Because rare earth atom is poly-partially and other elemental interactionses at crystal boundary, cause grain boundary structure chemical ingredients and energy variation, the nucleation that influences other elemental diffusion and cenotype is grown up, and causes the tissue and the performance variation of steel.
The attrition resistant stainless steel of novel fire resistant acid corrosion-resistant of the present invention has been proposed for the above reasons, this stainless material not only has oxidation-resistance and reductibility effect in high temperature different concns sulfuric acid medium, but also has favorable rigidity intensity and cold and hot working performance.Stainless material of the present invention is applicable under the high temperature and uses under the various sulfuric acid concentration conditions that especially result of use obviously is better than other model stainless steel in temperature 80-120 ℃ 50-70% sulfuric acid medium.
The present invention and domestic composition such as the table of comparing with the U.S. present oxidation-resistance sulfuric acid medium material 1:
The table 1 main component comparative analysis of stainless steel of being correlated with
Embodiment
The following examples will give further instruction to the present invention, but not thereby limiting the invention.
Embodiment 1
Use antivacuum medium-frequency induction furnace smelting stainless steel, with sand mold or permanent mold casting, progressively be warming up in the smelting process about 1600 ℃, the time is 2.5 hours, and casting back foundry goods needs to be incubated 2 days in die cavity, and coupongs are tested.Stainless steel each elementary composition such as table 2.Its acid corrosion-resistant performance such as table 3 and table 4 in 98% vitriol oil and 93% vitriol oil.
The composition of each element in table 2 stainless steel of the present invention
The anti-corrosion capability of stainless steel in 98% vitriol oil that table 3 is dissimilar
The anti-corrosion capability of stainless steel in 93% vitriol oil that table 4 is dissimilar
As can be seen from the table: corrosion resistance of the present invention is better than domestic and international related products level, can be applied in the middle of the 90% above vitriol oil medium.
Embodiment 2
Use antivacuum medium-frequency induction furnace smelting stainless steel, with sand mold or permanent mold casting, progressively be warming up in the smelting process about 1650 ℃, the time is 3 hours, and casting back foundry goods needs to be incubated 3 days in die cavity, and coupongs are tested.Stainless steel each elementary composition such as table 5.Its acid corrosion-resistant performance such as table 6 in 60% vitriol oil.
The composition of each element in table 5 stainless steel of the present invention
The anti-corrosion capability of stainless steel in 60% vitriol oil that table 6 is dissimilar
As can be seen from the table: corrosion resistance of the present invention is better than domestic and international related products level, can be applied in the middle of 60% vitriol oil medium.
Embodiment 3
Use antivacuum medium-frequency induction furnace smelting stainless steel, with sand mold or permanent mold casting, progressively be warming up in the smelting process about 1700 ℃, the time is 2.8 hours, and casting back foundry goods needs to be incubated 4 days in die cavity, and coupongs are tested.Stainless steel each elementary composition such as table 7.Its acid corrosion-resistant performance such as table 8 in 60% vitriol oil.
The composition of each element in table 7 stainless steel of the present invention
The anti-corrosion capability of stainless steel in 60% vitriol oil that table 8 is dissimilar
As can be seen from the table: corrosion resistance of the present invention is better than domestic and international related products level, can be applied in the middle of 60% vitriol oil medium.
Embodiment 4
Use antivacuum medium-frequency induction furnace smelting stainless steel, with sand mold or permanent mold casting, progressively be warming up in the smelting process about 1680 ℃, the time is 2.9 hours, and casting back foundry goods needs to be incubated 5 days in die cavity, and coupongs are tested.Stainless steel each elementary composition such as table 9.Its acid corrosion-resistant performance such as table 10 in 60% vitriol oil.
The composition of each element in table 9 stainless steel of the present invention
The anti-corrosion capability of stainless steel in 60% vitriol oil that table 10 is dissimilar
As can be seen from the table: corrosion resistance of the present invention is better than domestic and international related products level, can be applied in the middle of 60% vitriol oil medium.
Claims (5)
1. the stainless steel of a high temperature-resistant and acid corrosion-resistant, it is characterized in that: this stainless steel composition contains iron, carbon, silicon, copper, sulphur, phosphorus, chromium, nickel, molybdenum, manganese, trace element;
The weight percent of each composition is: carbon 0.001-0.04%, silicon 2.0-9.0%, sulphur 0.001-0.03%, phosphorus 0.001-0.03%, chromium 18.0-35.0%, nickel 25.0-45.0%, molybdenum 2.0-5.0%, copper 1.0-4.0%, manganese 0.5-1.0%, micro-0.2-0.5%, iron are surplus.
2. according to the stainless steel of the described high temperature-resistant and acid corrosion-resistant of claim 1, it is characterized in that: the weight percent of carbon chromium nisiloy molybdenum copper manganese vanadium composition is a carbon 0.03% in the described stainless steel, silicon 5.0%, manganese 0.8%, chromium 25.0%, nickel 36.0%, molybdenum 3.6%, copper 1.5%, vanadium 0.3%.
3. the stainless preparation method of the described high temperature-resistant and acid corrosion-resistant of claim 1 is characterized in that: use antivacuum medium-frequency induction furnace to smelt, with sand mold or permanent mold casting, casting back foundry goods is incubated in die cavity.
4. according to the stainless preparation method of the described high temperature-resistant and acid corrosion-resistant of claim 3, it is characterized in that: progressively be warmed up at least 1600 ℃ in the described smelting process, the time is 2.5-3.0 hour.
5. according to the stainless preparation method of the described high temperature-resistant and acid corrosion-resistant of claim 3, it is characterized in that: described casting back foundry goods is incubated at least 2 days in die cavity.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020543A (en) * | 2019-11-27 | 2020-04-17 | 太仓市珠港金属制品有限公司 | High-strength corrosion-resistant new energy electric car support piece and preparation method thereof |
| CN111647827A (en) * | 2019-03-03 | 2020-09-11 | 山东森宇重工机械有限公司 | High-temperature-resistant corrosion-resistant furnace body material and preparation method thereof |
| CN112771181A (en) * | 2018-08-29 | 2021-05-07 | 凯密迪公司 | Austenitic stainless steel alloy with superior corrosion resistance |
| CN112853231A (en) * | 2020-08-18 | 2021-05-28 | 浙江增诚钢管有限公司 | Stainless steel seamless steel tube for high-pressure boiler and manufacturing method thereof |
| CN113481421A (en) * | 2021-06-24 | 2021-10-08 | 襄阳五二五泵业有限公司 | Chromium-nickel alloy for bushing bush and preparation method thereof |
| CN115679225A (en) * | 2021-07-28 | 2023-02-03 | 叶均蔚 | High chromium silicon corrosion resistant steel and use thereof |
-
2009
- 2009-03-25 CN CN200910010853A patent/CN101845600A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112771181A (en) * | 2018-08-29 | 2021-05-07 | 凯密迪公司 | Austenitic stainless steel alloy with superior corrosion resistance |
| CN111647827A (en) * | 2019-03-03 | 2020-09-11 | 山东森宇重工机械有限公司 | High-temperature-resistant corrosion-resistant furnace body material and preparation method thereof |
| CN111020543A (en) * | 2019-11-27 | 2020-04-17 | 太仓市珠港金属制品有限公司 | High-strength corrosion-resistant new energy electric car support piece and preparation method thereof |
| CN112853231A (en) * | 2020-08-18 | 2021-05-28 | 浙江增诚钢管有限公司 | Stainless steel seamless steel tube for high-pressure boiler and manufacturing method thereof |
| CN113481421A (en) * | 2021-06-24 | 2021-10-08 | 襄阳五二五泵业有限公司 | Chromium-nickel alloy for bushing bush and preparation method thereof |
| CN115679225A (en) * | 2021-07-28 | 2023-02-03 | 叶均蔚 | High chromium silicon corrosion resistant steel and use thereof |
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Open date: 20100929 |