CN101560634A - Abrasion and corrosion resistant nonmagnetic high-strength stainless steel - Google Patents
Abrasion and corrosion resistant nonmagnetic high-strength stainless steel Download PDFInfo
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- CN101560634A CN101560634A CNA2009100971334A CN200910097133A CN101560634A CN 101560634 A CN101560634 A CN 101560634A CN A2009100971334 A CNA2009100971334 A CN A2009100971334A CN 200910097133 A CN200910097133 A CN 200910097133A CN 101560634 A CN101560634 A CN 101560634A
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Abstract
The invention relates to abrasion and corrosion resistant nonmagnetic high-strength stainless steel, which comprises the following compositions by weight: 0.06 to 0.12 percent of carbon, 0.30 to 0.60 percent of silicon, 9.0 to 10.5 percent of manganese, less than or equal to 0.035 percent of phosphorus, less than or equal to 0.015 percent of sulfur, 17.00 to 18.00 percent of chromium, 4.00 to 6.00 percent of nickel, 0.20 to 0.35 percent of nitrogen, and the balance of iron. The invention improves the strength and the abrasion resistance of materials by the addition of high content of manganese element, carbon element and nitrogen element with reasonable proportioning, achieves the aim of enlarging the austenite tissue, and obviously reduces the magnetism of the stainless steel.
Description
Technical field
The present invention relates to a kind of austenitic stainless steel, particularly a kind of lower-cost abrasion and corrosion resistant nonmagnetic high-strength stainless steel.
Background technology
Along with expanding economy, the exotic materials kind of various industrial requirements is more and more.For example in mining is produced, need to use a large amount of screen clothes, as the expendable part that ore dressing is used, service condition is abominable, so the material that requires the manufacturing screen cloth to use has very high comprehensive use properties, cost must be low simultaneously.What make all the time that screen cloth uses is conventional stainless material, and this materials processing performance, solidity to corrosion are all fine, but maximum shortcoming is that wear resistance is bad, and intensity is also not enough, and price is very high, in actual use the life-span very short, use cost is very high; For addressing the above problem, Chinese invention patent ZL95112786.1 has developed a kind of stainless steel, and its wear resistance, solidity to corrosion, intensity are greatly improved, but cost is more taller than conventional stainless steel, and hot workability is poor, is difficult to large-scale promotion; Chinese invention patent ZL200710134321.0 disclosed a kind of stainless steel afterwards, and the percentage composition of its each composition is C:0.06～0.11, Mn:14～19, Si:0～3, P :≤0.054, S :≤0.03, Cr:16～18, N:0.1～0.4, Cu:1.0～2.5, Mo:0～3, Ni:0～2, Re:0～0.22, surplus are iron and inevitable impurity.Its intensity, plasticity and toughness, wear and corrosion behavior all are better than conventional stainless steel, and cost also descends to some extent, but its controlling of production process is difficult, and this material is through after the cold drawn processing, and permeability is higher, can not satisfy the industrial quality requirement.
Summary of the invention
The purpose of this invention is to provide a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, it comprises the composition that following weight percent is formed: C0.06～0.12%, Si0.30～0.60%, Mn9.0～10.5%, P≤0.035%; S≤0.015%, Cr17.00～18.00%, Ni4.00～6.00%, N0.20～0.35%, all the other are Fe.
The present invention certainly comprises some unavoidable impurity.
Change along with other change of elements as the shared per-cent of the iron of main body.
The magnetic of metal derives from the structure of electron spinning, and electron spinning belongs to the quantum mechanical performance, both can " make progress ", also can " downwards ".In ferromagnetic metal, electronics can be rotated according to same direction automatically, and in the antiferromagnetism metallic substance, some electronics carry out according to the pattern of rule, adjacent electronics is then towards reverse direction or antiparallel spin, but for the electronics in the triangular lattice, owing to two electronics in each trilateral all must spin according to equidirectional, so spin structure does not exist.As a rule, austenitic stainless steel is non-magnetic, but also may have weak magnetic, and ferrite and martensite generally all have magnetic.There are some steel classifications the stainless steel the inside for its magnetic index that is meant of " nonmagnetic stainless steel " is lower than certain value, that is to say that the general stainless steel capital more or less has certain magnetic.In addition, mentioning austenite above is no magnetic or weak magnetic, and ferrite and martensite are magnetic, and component segregation or thermal treatment are improper during owing to smelting, can cause to occur a spot of martensite or ferritic structure in the austenitic stainless steel, weak magnetic will occur in the stainless steel like this.In addition, stainless steel is through cold working, and weave construction also can transform to martensite, and cold deformation is big more, and martensite transforms many more, and magnetic also can be strong more.Want to eliminate fully stainless magnetic, can eliminate martensite and ferrite in the stainless steel, thereby eliminate magnetic.Said ratio component of the present invention can reach this balance with forging a good relationship, detects through experiment, and stainless steel of the present invention is close with strong magnets on the standard level table top, does not have any absorption, mobile phenomenon.This has proved that it is good nonmagnetic.
Chromium of the present invention is topmost alloying element in the stainless steel.The rustless property of austenitic stainless steel and corrosion proof acquisition are because under the medium effect, chromium has promoted the passivation of steel and made steel keep stablizing passive result.What chromium had the greatest impact to performance of austenitic stainless steel is solidity to corrosion, shows that mainly chromium 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 low excessively, and the present invention is controlled at them between 16～18%.Carbon is strong formation and stable austenite and the element that enlarges the austenitic area.Carbon forms austenitic ability and is about 30 times of nickel, and for stainless steel, carbon is a kind of harmful element, and this mainly is because the carbide of the chromium formation Gao Ge in carbon and the steel, and the corrosion resistance nature that makes steel is the intergranular corrosion resistance degradation particularly; But carbon was controlled and was hanged down as C＜0.06%, can influence the stability of single austenite structure, so control carbon is in 0.06～0.12% scope.The adding of element silicon has deoxidation effect, and when silicon existed with the form of solid solution attitude, it can improve the yield strength of matrix, but the ductile-brittle transition temperature of material is improved, and therefore, the present invention is decided to be 0.3～0.6% with its content.
The present invention is except considering above-mentioned factor, and also on chemical composition design, manganese, carbon, the nitrogen element by adding high level also carries out rational proportion, improves the intensity and the wear resistance of material, and reached the purpose that enlarges austenite structure; Simultaneously, for the stability that improves austenite structure and the plasticity of material, and reduce the tendency that magnetic rises after the cold working, the present invention also adds the nickel element of certain content; For fear of the red brittleness problem that element sulphur causes, the present invention also is controlled at extremely low level to sulphur content, and this can adopt the argon oxygen decarburizing furnace refinery practice; In order to improve solidity to corrosion and the oxidation-resistance of improving steel, and will prevent the formation of ferritic phase, by other chemical elements of overall equilbrium, the chromium element is controlled at 17.20～17.80%, guarantees to form Cr on the surface of steel
2O
3Protective membrane stops steel to be continued oxidation; And make the electropotential of steel just become by negative, improve electrochemically resistant and learned corrosive nature.
In addition, need pay special attention to the relation of carbon, manganese, nitrogen element and content, carbon element content is low, and is not obvious to promoting the intensity effect, and too high levels can directly cause the intergranular corrosion resistance ability drop of material; The selection of manganese element content is very exquisite especially, and its too high levels can influence solidity to corrosion, but it helps to generate texture structure, promotes soundness, intensity, wear resistance, can slacken or eliminate the detrimentally affect of sulphur, more can effectively improve the solubleness of nitrogen in molten steel; Nitrogen content among the present invention is than higher, and the solubleness of nitrogen also requires necessary high in the molten steel.Carbon, manganese, nitrogen element total content are than higher, because its ability that forms austenite structure is all very strong, can significantly reduce the content of noble metal nickel.
In order further to improve effect of the present invention, as of the present invention preferred, C0.08～0.10% wherein.
As of the present invention preferred, S≤0.005%.
As of the present invention preferred, Cr17.20～17.80%.
As of the present invention preferred, N0.25～0.30%.
With low cost for making, the starting material that the present invention adopts mainly contain steel scrap, high carbon ferro-chrome, electrolytic manganese, nitrogen, ferrosilicon, a small amount of ferronickel or nickel plate etc., and the modes such as induction furnace, electric arc furnace, argon oxygen decarburizing furnace that are applicable to are smelted.
The available smelting mode of the present invention is the duplex technology that electric arc furnace adds argon oxygen decarburizing furnace.
In sum, the present invention has following beneficial effect:
1, the present invention by adding high level manganese, carbon, nitrogen element and carry out rational proportion, improve the intensity and the wear resistance of material, and reached the purpose that enlarges austenite structure, this has reduced the stainless magnetic of gained of the present invention significantly;
2, the present invention improves the stability of austenite structure and the plasticity of material by adding the nickel element of certain content, and the tendency that magnetic rises after the reduction cold working;
3, the present invention is controlled at extremely low level to the sulphur content in the stainless steel, the red brittleness problem of having avoided element sulphur to cause;
4, the present invention will rationally handle the relation of the content of carbon, avoid carbon element content low, to promoting the unconspicuous shortcoming of intensity effect, avoid too high levels simultaneously, cause the shortcoming of the intergranular corrosion resistance ability drop of material;
5, the present invention has reasonably handled the content of manganese element, and this content helps to generate texture structure, promotes stainless soundness, intensity, wear resistance, also can slacken and eliminate the detrimentally affect of sulphur, more can effectively improve the solubleness of nitrogen in molten steel
6, the present invention has reasonably heightened the content of nitrogen element, because molten steel of the present invention is higher to the solubleness of nitrogen, make the present invention can add more nitrogen element, like this, carbon, manganese, nitrogen element total content are than higher among the present invention, because the ability that they form austenite structure is all very strong, therefore, can significantly reduce the content of noble metal nickel among the present invention.
Embodiment
This embodiment only is an explanation of the invention; it is not a limitation of the present invention; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification sheets, but as long as all are subjected to the protection of patent law in claim scope of the present invention.
Embodiment 1, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, and its Chemical Composition is: C0.087%, Si0.39%, Mn9.50%, P≤0.024%; S≤0.001%, Cr17.55%, Ni5.04%, N0.28%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.The tensile strength of wire rod under the condition of delivery of hot rolling acid-cleaning is 845MPa, and unit elongation is 55%, and relative reduction in area is 75%.According to GB/T4334.5～2000 test methods, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1400MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Example 2, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, its Chemical Composition is: C0.089%, Si0.35%, Mn9.68%, P≤0.028%; S≤0.001%, Cr17.53%, Ni5.01%, N0.29%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.Present embodiment gained wire rod under the condition of delivery of hot rolling acid-cleaning, its tensile strength 835MPa, unit elongation 54%, relative reduction in area 73%.According to GB/T4334.5～2000 test methods, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1400MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Embodiment 3, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, and its Chemical Composition is: C0.06%, Si0.30%, Mn9.0%, P≤0.024%; S≤0.001%, Cr17.00%, Ni4.00%, N0.20%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.The tensile strength of wire rod under the condition of delivery of hot rolling acid-cleaning is 800MPa, and unit elongation is 53%, and relative reduction in area is 72%.According to GB/T4334.5～2000 test methods, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1350MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Embodiment 4, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, and its Chemical Composition is: C0.12%, Si0.60%, Mn10.50%, P≤0.024%; S≤0.001%, Cr18.00%, Ni6.00%, N0.35%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.The tensile strength of wire rod under the condition of delivery of hot rolling acid-cleaning is 835MPa, and unit elongation is 52%, and relative reduction in area is 72%.According to GB/T4334.5～2000 test methods, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1360MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Embodiment 5, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, and its Chemical Composition is: C0.08%, Si0.39%, Mn9.50%, P≤0.024%; S≤0.001%, Cr17.20%, Ni5.04%, N0.28%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.The tensile strength of wire rod under the condition of delivery of hot rolling acid-cleaning is 858MPa, and unit elongation is 59%, and relative reduction in area is 78%.According to GB/T4334.5～2000 test methods, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1400MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Embodiment 6, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, and its Chemical Composition is: C0.10%, Si0.39%, Mn9.50%, P≤0.024%; S≤0.001%, Cr17.80%, Ni5.04%, N0.30%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.The tensile strength of wire rod under the condition of delivery of hot rolling acid-cleaning is 860MPa, and unit elongation is 53%, and relative reduction in area is 78%.According to GB/T4334.5～2000 test methods, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1420MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Embodiment 7, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, and its Chemical Composition is: C0.070%, Si0.39%, Mn9.50%, P≤0.024%; S≤0.001%, Cr17.55%, Ni 5.04%, N0.20%, all the other are Fe.Form is a wire rod, and it adopts following technical process: buying starting material → batching → shove charge → electric arc furnace just refines → is blended into argon oxygen decarburizing furnace refining → draw slag → alloy calculating and add → decarburization → slag making → prereduction → draw slag → reduction → refining at end → tapping → die casting → grinding of steel ingot → heating → breaking down cogging → square billet sharpening → heating → tandem rolling → wire collecting → pickling → finishing → packing → warehouse-in.The tensile strength of wire rod under the condition of delivery of hot rolling acid-cleaning is 815MPa, and unit elongation is 50%, and relative reduction in area is 70%.According to the GB/T4334.5-2000 test method, sample carries out boiling test in 16 hours continuously in sulfuric acid～copper-bath, through check, sample does not have any intergranular corrosion tendency, tensile strength can reach 1400MPa after cold drawn, and close with strong magnets on the standard level table top, there are not any absorption, mobile phenomenon.
Claims (5)
1, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel, it comprises the composition that following weight percent is formed: C0.06～0.12%, Si0.30～0.60%, Mn9.0～10.5%, P≤0.035%; S≤0.015%, Cr17.00～18.00%, Ni4.00～6.00%, N0.20～0.35%, all the other are Fe.
2, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel according to claim 1 is characterized in that: the percentage composition of C is 0.08～0.10%.
3, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel according to claim 1, it is characterized in that: the percentage composition of S is≤0.005%.
4, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel according to claim 1 is characterized in that: the percentage composition of Cr is 17.20～17.80%.
5, a kind of abrasion and corrosion resistant nonmagnetic high-strength stainless steel according to claim 1 is characterized in that: the percentage composition of N is 0.25～0.30%.
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| CNA2009100971334A CN101560634A (en) | 2009-03-20 | 2009-03-20 | Abrasion and corrosion resistant nonmagnetic high-strength stainless steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002647A (en) * | 2010-12-31 | 2011-04-06 | 上海加宁新技术研究所 | High-strength non-magnetic stainless steel |
| CN103045953A (en) * | 2013-01-05 | 2013-04-17 | 北京科技大学 | Heat-aging-resistant duplex stainless steel and fabrication method thereof |
| CN109112431A (en) * | 2018-10-10 | 2019-01-01 | 温州市安硕新材料有限公司 | A kind of deep-draw molding magnetism-free stainless steel cold-reduced sheet and preparation method |
| CN111041349A (en) * | 2019-11-26 | 2020-04-21 | 中国石油天然气集团有限公司 | High-chromium alloy corrosion-resistant continuous pipe and preparation method thereof |
-
2009
- 2009-03-20 CN CNA2009100971334A patent/CN101560634A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002647A (en) * | 2010-12-31 | 2011-04-06 | 上海加宁新技术研究所 | High-strength non-magnetic stainless steel |
| CN102002647B (en) * | 2010-12-31 | 2012-05-09 | 上海加宁新技术研究所 | High-strength non-magnetic stainless steel |
| CN103045953A (en) * | 2013-01-05 | 2013-04-17 | 北京科技大学 | Heat-aging-resistant duplex stainless steel and fabrication method thereof |
| CN103045953B (en) * | 2013-01-05 | 2015-06-03 | 北京科技大学 | Heat-aging-resistant duplex stainless steel and fabrication method thereof |
| CN109112431A (en) * | 2018-10-10 | 2019-01-01 | 温州市安硕新材料有限公司 | A kind of deep-draw molding magnetism-free stainless steel cold-reduced sheet and preparation method |
| CN109112431B (en) * | 2018-10-10 | 2022-09-09 | 温州市安硕新材料有限公司 | Nonmagnetic stainless steel cold-rolled sheet for deep drawing forming and preparation method thereof |
| CN111041349A (en) * | 2019-11-26 | 2020-04-21 | 中国石油天然气集团有限公司 | High-chromium alloy corrosion-resistant continuous pipe and preparation method thereof |
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Application publication date: 20091021 |