CN101139688A - Low-cost rare earth chromic manganese nitrogen stainless steel - Google Patents
Low-cost rare earth chromic manganese nitrogen stainless steel Download PDFInfo
- Publication number
- CN101139688A CN101139688A CNA2007101639864A CN200710163986A CN101139688A CN 101139688 A CN101139688 A CN 101139688A CN A2007101639864 A CNA2007101639864 A CN A2007101639864A CN 200710163986 A CN200710163986 A CN 200710163986A CN 101139688 A CN101139688 A CN 101139688A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- rare earth
- per cent
- nickel
- low
- Prior art date
- 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.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 51
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 46
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 43
- 239000010935 stainless steel Substances 0.000 title claims abstract description 41
- RBVYPNHAAJQXIW-UHFFFAOYSA-N azanylidynemanganese Chemical compound [N].[Mn] RBVYPNHAAJQXIW-UHFFFAOYSA-N 0.000 title claims description 20
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- 229910052804 chromium Inorganic materials 0.000 claims description 14
- 239000011572 manganese Substances 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 54
- 239000000463 material Substances 0.000 abstract description 44
- 239000010949 copper Substances 0.000 abstract description 17
- 229910001566 austenite Inorganic materials 0.000 abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910018648 Mn—N Inorganic materials 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 239000011651 chromium Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 12
- 229910000859 α-Fe Inorganic materials 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000005097 cold rolling Methods 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- -1 iron rare earth ion Chemical class 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000010068 moulding (rubber) Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 241000167880 Hirundinidae Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- NHCSMTQRYWPDDW-UHFFFAOYSA-N [C].[N].[S] Chemical compound [C].[N].[S] NHCSMTQRYWPDDW-UHFFFAOYSA-N 0.000 description 1
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005088 metallography Methods 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention provides a rare-earth Cr-Mn-N stainless steel material with low cost. The components based on the weight percentage are that: C of 0.075 per cent to 0.15 per cent, Si is of no more than 1.00 per cent, Mn of 8.5 to 12.0 per cent, S is of no more than 0.030 per cent, P is of no more than 0.060 per cent, Ni of 0.6 to 1.3 per cent, Cr of 12.5 to 15.0 per cent, Cu of 0.05 to 0.8 per cent, N is of no more than 0.2 per cent, rare earth of 0.005 to 0.030, and the remainder is Fe. By increasing properly the carbon content, the invention ensures that the material is of austenite phase under room temperature, shortens the smelting time, reduces the cost by reducing further the content of copper and nickel, and improves the cold bending performance of the material.
Description
Technical field
The present invention relates to a kind of stainless steel, relate more specifically to a kind of rare earth chromic manganese nitrogen stainless steel cheaply.
Background technology
For Ni, material cost significantly reduces chromic manganese nitrogen series stainless steel (is steel hereinafter to be referred as 200) with Mn-N, and a series of variations also appear in performance.After reducing Ni,, must there be sufficiently high Mn, C and N to increase nickel equivalent in order to guarantee austenite structure.Element to stainless performance and tissue influence's maximum is: carbon, chromium, nickel, manganese, silicon, molybdenum, titanium, niobium, nitrogen, copper, cobalt etc.Wherein, iron, chromium and nickel are three big infrastructure elements of Chromiumnickel Austenite Stainless Steel, and reasonably combined by chromium and nickel adds other elements, can at room temperature keep austenitic matrix.Add an amount of manganese and nitrogen in addition, can reduce nickel content.Ferrite content in the stainless steel and Cr, Ni equivalent have much relations, and nickel equivalent, chromium equivalent are calculated by following formula:
Nickel equivalent Nieq=Ni+Co+0.5Mn+0.3Cu+30N+30C
Chromium equivalent Creq=Cr+2Si+1.5Mo+5V+5.5Al+1.75Nb+1.5Ti+0.75W
Many investigators have carried out number of research projects, proposed as shown in Figure 1, 2 the chromium nickel equivalent and the graph of a relation of ferrite formation amount.In order at room temperature to obtain austenite material, nickel equivalent Nieq is 12.7～13.22, and chromium equivalent Creq is about 14.According to Fig. 1, promptly Schaeffler schemes, and nickel equivalent is obviously on the low side, but according to Fig. 2, promptly Hammond schemes, and the material that nickel equivalent is controlled at above-mentioned scope at room temperature can obtain austenite structure.Below be to get in touch 9 pieces in closer document, enumerate respectively and be discussed below with the present invention:
1, fourth sunshine, Yuan Wenyin etc., rare earth are to the influence of chromic manganese nitrogen stainless steel corrosion wear characteristic in the dilute sulphuric acid medium, Chinese rare-earth journal, 1997, (1592): 146～150;
2, Gao Zhenhuan, rare earth is to the thermoplastic influence of austenitic stainless steel, rare earth, 1993,14 (4): 18～23;
3, Zhang Xiang, Zhang Jun, stainless steel add the research of iron rare earth ion sulphonitrocarburizing technology, sufacing, 2004, (2): 40～42;
4, the distant special trial-production 201Cu of group wire rod is achieved success heavy steel technology, 2004,47 (1): 18;
5, Yuan Zhizhong, Dai Qixun etc., the nitrogen effect in austenitic stainless steel, Jiangsu University's journal (natural science edition), 2002,23, (3): 72～75;
6, University Of Tianjin, austenitic stainless steel, China Patent No.: 93106802.9;
7, University On The Mountain Of Swallows, the special-purpose nitrogen austenite Mn-Cr steel of railroad frog, China Patent No.: 03128763.8;
8, Qinhuangdao Branch of Northeast Heavy Machinery College, Cr-Mn-N Series Stainless steel used on rotor wheel of water turbine, China Patent No.: 90102197.8;
9, Kawasaki Steel Corp, the clear 54-38217 of Japanese patent application.
Document 1 has been introduced Shenyang University of Technology of author unit one belongs to and has been studied rare earth to the corrosive nature of chromic manganese nitrogen stainless steel and the influence of corrosion wear characteristic.Test shows that rare earth makes the corrosion potential of chromic manganese nitrogen stainless steel shuffle, tie up blunt electric current reduction, thermodynamic stability improves, so the phase solidity to corrosion improves, resistance to abrasion is improved.The author thinks, the best content of rare earth 0.02～0.06% of chromic manganese nitrogen stainless steel, and this research provides necessary processing parameter for production.
Document 2 has been introduced the author and has been adopted high temperature impact method, hot torsional technique and wedge rolling method to study rare earth to the thermoplastic influence of polynary Cr-Ni austenitic stainless steel, also the formation of rolling crack, the pattern of impact fracture and the deviation of alloy has been done metallographic and scanning electron microscope observation.Experiment showed, that the test steel adds the hot twisting number that critical draft that surging force that rare earth can make 950～1200 ℃ improves 20%, 900～1200 ℃ improves 15%, 950～1200 ℃ and improves 20～30%.The author thinks that the major cause that thermoplasticity is improved is the result that rare earth improves process of setting, refined cast structure, minimizing alloy deviation, reinforcement crystal boundary.
Document 3 has been introduced the author 1Cr18Ni12Mo2Ti austenitic stainless steel has been carried out adding under the rare earth catalytic cementation condition and the ion sulfur-nitrogen co-cementing simultaneous test that does not add auxiliary iron plate.Test shows that rare earth has the very strong effect of oozing of urging.With the acting in conjunction of auxiliary iron plate under, can make the nitriding temperature of austenitic stainless steel reduce by 60 ℃, reduced to advance the distortion of part: identical oozing altogether under the temperature condition, can make nitride layer depth increase more than 30% than ion sulphonitrocarburizing, increase by 10% than the rare earth ion sulphur nitrogen carbon that does not add auxiliary iron plate, and rare earth element can infiltrate the steel top layer, the refinement diffusion layer organization, promote tiny the separating out of nitrogen carbon compound disperse, improve nitrided layer hardness.
Document 4 has been introduced the low Ni austenitic stainless steel of the high Mn of a kind of tool 201Cu with broad prospects for development that Liaoning special steel group succeeds in developing.The low Ni austenitic stainless steel of the high Mn of this 201Cu adds Cu and grows up on 200 series stainless steel bases, owing to replaced Ni with Mn and N, reduced stainless production cost, has bigger economy.And add portion C u, improved the performance of 200 series stainless steels again.
Document 5 has been introduced in austenitic stainless steel an amount of nitrogen that adds can improve austenite structure stability, mechanical property and part resistance to corrosion.Result of study shows, because the nitrogen price is very cheap, can partly even all replace the premium properties that shows after nickel and the alloying.
Document 7 has been introduced the special-purpose nitrogen austenite Mn-Cr steel of a kind of railroad frog, and its chemical ingredients is (wt%): C 1.0-1.2, Mn 10-13, N 0.03-0.15, Cr 1.5-2.5, Cu 0.1-1.0, Re 0.1-0.3, Si＜0.5, S＜0.03, P＜0.03; Thermal treatment process is: be heated to shrend after 1000 ℃ of-1100 ℃ of insulations, obtain single-phase austenite structure; Conventional mechanical property is: tensile strength＞900MPa, impact toughness＞150J/cm
2
Document 9 disclosed stainless material component contents are that C＜0.04, Si≤1.00%, Mn 6.0～13.0%, S≤0.030%, P≤0.060%, Ni1.0～3.5%, Cr 13.0～19.0%, Cu 1.0～3.5%, N≤0.3%, rare earth 0.005～0.30, surplus are Fe.。
What above-mentioned document was mainly considered is the problem of erosion resistance, but production cost is higher.
Summary of the invention
At the problems referred to above, the invention provides a kind of low-cost rare earth chromic manganese nitrogen stainless steel, it reduces under the prerequisite of material corrosion resistance in little amplitude, the content that increases C as much as possible comes the stable austenite phase, shortens the heat, and reduces power consumption, and reach the purpose that reduces production costs by the content that reduces Ni, Cu, utilize the low good characteristics of copper product cold-bending property, improve the cold-bending property of chromic manganese nitrogen series stainless steel, lay the foundation in the application of tubing production field for improving this material.
Its composition of chromic manganese nitrogen stainless steel material of the present invention is by weight percentage: C 0.075%～0.15%, Si≤1.00%, Mn 8.5～12.0%, S≤0.030%, P≤0.060%, Ni 0.6～1.3%, Cr 12.5～15.0%, Cu 0.05～0.8%, N≤0.2%, rare earth 0.005～0.030, surplus are Fe.Wherein, more preferably C+N 〉=0.22%.Described rare earth is preferably cerium and/or lanthanum.
Description of drawings
Fig. 1 is that demonstration Ni, Cr equivalent are schemed the Schaeffler of the influence of ferrite content;
Fig. 2 is the Hammond figure that shows stainless steel tissue under the room temperature;
Fig. 3 is under different solid solution temperatures, adds rare earth and does not add the comparison diagram of the material breaking tenacity Rm (MPa) of rare earth;
Fig. 4 is under different solid solution temperatures, adds rare earth and does not add the comparison diagram of the material relative reduction in area Z% of rare earth;
Fig. 5 is under different solid solution temperatures, adds rare earth and does not add the comparison diagram of the material impact merit AKV (J) of rare earth;
Fig. 6 amplifies 100 times No. 1 sample of material a little ferrite organization chart;
Fig. 7 amplifies 100 times No. 2 sample of material a little ferrite organization charts;
Embodiment
The present invention is the further a kind of low copper of exploitation, a low nickel rare earth chromic manganese nitrogen stainless steel on patent application " novel rare-earth low-nickel CrMnN stainless steel " basis (CN1876882A) the applicant.The high characteristics of the disclosed rare earth low-nickel CrMnN stainless steel toughness of material of the above-mentioned patent application of this material use further reduce the content of noble element nickel, copper, thereby reduce the production cost of stainless material.Be in austenite in order to ensure material, the present invention has increased the content of carbon, for the reduction of nickel creates conditions, and utilizes the high characteristics of toughness of material deposit, has reduced the content of copper.
The present invention reduces the content of nickel element, copper by optimizing the alloying element proportioning of chromic manganese nitrogen stainless steel, and production cost is reduced significantly; And the cold-bending property that has improved material has very strong practicality.The tubing production that utilizes stainless material of the present invention to carry out shows that this material improves the bent tube technique performance, makes the composition proportion of material more can adapt to the requirement of tubing production and use.Its composition of rare earth chromic manganese nitrogen stainless steel material of the present invention is by weight percentage: C 0.075%～0.15%, Si≤1.00%, Mn 8.5～12.0%, S≤0.030%, P≤0.060%, Ni 0.6～1.3%, Cr 12.5～15.0%, Cu 0.05～0.8%, N≤0.2%, rare earth 0.005～0.030, surplus are Fe.Preferred C+N 〉=0.22%.When the content sum of carbon and nitrogen element is equal to or greater than 0.22%, can prevent too much the separating out of ferrite, keeping the corrosion resistance nature of material, and further improve cold deformation performance such as cold rolling, punching press.
Below further specify the present invention by specific embodiment.
With rare earth chromic manganese nitrogen stainless steel sheet material sample 1 of the present invention and 2 and the commercially available stainless steel materials sample 3 that do not add rare earth compare.Each composition is as shown in table 1 below in the sample 1～3.
The composition of each sample of table 1
| Sample | C | Si | Mn | Cr | Ni | S | P | Cu | Re | N |
| 1 | 0.09 | 0.63 | 10.5 | 13.6 | 0.8 | 0.019 | 0.025 | 0.063 | 0.005 | 0.13 |
| 2 | 0.089 | 0.7 | 10.6 | 13.3 | 1.3 | 0.013 | 0.035 | 0.8 | 0.024 | 0.125 |
| 3 | 0.06 | 0.65 | 10.23 | 14.06 | 1.07 | 0.008 | 0.030 | 1.51 | --- | 0.12 |
By table 1 as seen, the nickel of sample 3, copper content are higher, and do not add rare earth element.The sample 3 and the sample 1 of material of the present invention are carried out the comparison (seeing Fig. 3,4,5) of material breaking tenacity (Rm) under the different solid solution temperature conditions, relative reduction in area (Z%), ballistic work (AKV).Experimental basis GB/T228-2002 material extending experimental technique and GB/T229-1994 material impact merit experimental technique carry out.
Rare earth is the key of decision cold rolling performance of hot-rolled sheet and material deep drawability to the improvement of hot-rolled sheet intensity, toughness rational Match relation.The toughness of the hardness of suitable reduction hot-rolled sheet, raising material can improve the single pass draught of cold-reduced sheet processing, reduces the appearance of broken limit phenomenon.And intensity, the toughness of suitably regulating material make it to reach the deep drawability that rational coupling can improve cold-reduced sheet, reduce the materials consumption of product, reduce process procedure, save the production technique cost.From Fig. 3,4,5 as can be seen, add the toughness that rare earth can improve material, the raising toughness along with content of rare earth in the scope of 0.005～0.030wt% also increases.
In addition, further analyze under the rare earth chromic manganese nitrogen stainless steel working condition of the present invention ferritic content (seeing Fig. 6,7).Because the influence of the fluctuation of the composition of material, thermal treatment process often contains a little ferrite in the matrix.Along the rolling direction sampling core, two kinds of test steel samples are inlayed after grind, throw and make the standard metallographic specimen.When polishing attitude and etch attitude, with MEF4 type metallography microscope sem observation, the photograph of Leca company production.According to GB/T13305-1991 " α phase area content metallographic assay method in the austenitic stainless steel " evaluation ferrite content.GB/T10561-1989 " the micro-assessment method of nonmetallic inclusionsin steel ", the non-metallic inclusion of evaluation sample.Microstructure by observing four groups of samples after the etch is austenite+a little ferrite shown in Fig. 6,7.The ferrite content of No. 1 sample of material, No. 2 sample of material is 0.5 grade (≤2%).
Above experimental result shows, by suitable raising austenite former carbon content, the content of valuable austenite former nickel, copper is reduced to 0.6～1.3% and 0.05～0.8% respectively, can guarantee that material is under working condition, ferrite content reaches user's requirement less than 2 grades.
The smelting technology of low-cost rare earth chromic manganese nitrogen stainless steel of the present invention and above-mentioned publication number are that disclosed smelting technology is identical in the patent application of CN1876882A.This patent application is hereby incorporated by in full.Concrete smelting technology is consulted above-mentioned patent application document, is not described in detail in this.This specification sheets only illustrates the cold-rolling process and the technical process of argon arc welded stainless steel pipe of low-cost rare earth chromic manganese nitrogen stainless steel of the present invention:
1. stainless-steel cold-rolling processing process
(1) after the stainless steel belt process hot rolling processing treatment, thickness is generally 2.5～4.5mm, must test to the hot-rolled stainless steel strip surface before entering cold rolling processing, polish and repair smoothly in surperficial defective place, and whole surface washes with water removes lip-deep dirt;
(2) with the steel band handled well because of carrying out roughing as cold-rolling mill, through three to four-pass cold rolling, thickness can be rolled to 1.00mm;
(3) generally increase to 280～300 degree through the steel band Vickers' hardness after the roughing, annealed furnace annealing is handled, and enters to do to do in the throwing machine to throw dedusting, and the steel band hardness after the anneal is reduced to Vickers' hardness 170～180 degree;
(4) steel band after will annealing is introduced finishing mill and is carried out finish rolling to needed thickness;
(5) steel strip surface after the finish rolling is handled through degreasing, handles through horizontal bright annealing oven, and the hardness that makes the steel band after the annealing by adjustment annealing temperature, speed is at Vickers 180～220 degree; Make steel strip surface brightness greater than 400# by adjusting the ammonia decomposition amount.
2. argon arc welded stainless steel pipe technical process
(1) the argon arc welded stainless steel pipe is operated by processing parameter shown in the following table 2:
Table 2 argon arc welding condition
| Thickness (mm) | Electric current (A) | Rotating speed (R/M) | Gear |
| 0.27～0.52 | 100～150 | 500～600 | 3 |
| 0.62～0.82 | 110～160 | 600～700 | 1 |
| 0.92～1.12 | 150～240 | 200～400 | 2 |
| 1.52～1.92 | 200～280 | 100～300 | Reverse gear |
The capillary specification of selecting for use when (2) decoration welds with welded tube is Φ 2.4;
(3) board bistrique fineness degree installation code is: first group is 240#, and second group is 320#, and the 3rd group is 600#;
(4) plastic cement mould use standard is:
Just marking tube thickness≤0.6mm, nonstandard tube thickness≤0.7mm, the 3rd group, the 5th group is used the plastic cement mould;
Just mark tube thickness＞0.6mm, nonstandard tube thickness＞0.7mm, banning use of the plastic cement mould;
Can not abide by above regulation because of Special Circumstances, make a determination by the technician;
Will rise by the plastic cement mould in the mistake excuse trends of the times, avoid the plastic cement wear to hinder; Rubber moulding must be risen when needing long-time the shutdown, when waiting to start shooting rubber moulding be pushed back again;
(5) argon flow amount is controlled in 3～5L/min scope, and nitrogen flow is controlled in 1～3L/min scope, except the Special Circumstances; Forbidding to do nitrogen protection with argon gas uses.
Use low-cost rare earth chromic manganese nitrogen stainless steel material of the present invention to carry out tubing production, through the enlarging experiment of Baotou quality product Measuring and testing institute, crooked experiment, the equal accord with Q of visual testing/BHS01-2007 standard-required.Wherein enlarging experimental result: the top heart with 60 ° of taperings does not have crackle and breach with outer diameter of steel pipes expansion 6%; The crooked experiment result: angle of bend is 90 °, and the flexual center radius is 3 times of steel pipe radius, and gauffer does not appear in inboard, steel pipe sample knee.By tubing whole process trial-production, adopt the material composition of the present invention's design, although improved the content of carbon, reduced the content of copper, nickel, be higher than the market sale contrast sample by rare earth modified processing toughness of material index, can satisfy the requirement of production.
Claims (3)
1. rare earth chromic manganese nitrogen stainless steel, it comprises following composition, is by weight percentage: C0.075%～0.15%, Si≤1.00%, Mn 8.5～12.0%, S≤0.030%, P≤0.060%, Ni 0.6～1.3%, Cr 12.5～15.0%, Cu 0.05～0.8%, N≤0.2%, rare earth 0.005～0.030, surplus are Fe.
2. stainless steel according to claim 1, wherein C+N 〉=0.22%.
3. stainless steel according to claim 1 and 2, wherein said rare earth are cerium and/or lanthanum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101639864A CN101139688A (en) | 2007-10-15 | 2007-10-15 | Low-cost rare earth chromic manganese nitrogen stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101639864A CN101139688A (en) | 2007-10-15 | 2007-10-15 | Low-cost rare earth chromic manganese nitrogen stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101139688A true CN101139688A (en) | 2008-03-12 |
Family
ID=39191793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101639864A Pending CN101139688A (en) | 2007-10-15 | 2007-10-15 | Low-cost rare earth chromic manganese nitrogen stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101139688A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435056B (en) * | 2008-11-27 | 2010-12-22 | 江苏利达不锈钢有限公司 | Novel low-cost free-cutting stainless steel 303C and manufacturing process thereof |
| CN102051460A (en) * | 2010-10-29 | 2011-05-11 | 山东理工大学 | Corrosion-resistance optimizing treatment process for Cr-Ni type stainless steel and corrosion-resistant plate |
| CN101892370B (en) * | 2009-05-21 | 2012-07-04 | 烨联钢铁股份有限公司 | Iron-chromium-manganese-nitrogen-waste stainless steel excellent in hot workability and manufacturing method thereof |
| CN104294176A (en) * | 2014-09-19 | 2015-01-21 | 东莞市迅盈精密五金有限公司 | Stainless steel non-magnetic material and balance weight made of it |
| CN112063936A (en) * | 2020-08-05 | 2020-12-11 | 广西柳钢中金不锈钢有限公司 | High-nitrogen low-nickel copper-free austenitic stainless steel |
-
2007
- 2007-10-15 CN CNA2007101639864A patent/CN101139688A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435056B (en) * | 2008-11-27 | 2010-12-22 | 江苏利达不锈钢有限公司 | Novel low-cost free-cutting stainless steel 303C and manufacturing process thereof |
| CN101892370B (en) * | 2009-05-21 | 2012-07-04 | 烨联钢铁股份有限公司 | Iron-chromium-manganese-nitrogen-waste stainless steel excellent in hot workability and manufacturing method thereof |
| CN102051460A (en) * | 2010-10-29 | 2011-05-11 | 山东理工大学 | Corrosion-resistance optimizing treatment process for Cr-Ni type stainless steel and corrosion-resistant plate |
| CN102051460B (en) * | 2010-10-29 | 2012-09-05 | 山东理工大学 | Corrosion-resistance optimizing treatment process for Cr-Ni type stainless steel and corrosion-resistant plate |
| CN104294176A (en) * | 2014-09-19 | 2015-01-21 | 东莞市迅盈精密五金有限公司 | Stainless steel non-magnetic material and balance weight made of it |
| CN112063936A (en) * | 2020-08-05 | 2020-12-11 | 广西柳钢中金不锈钢有限公司 | High-nitrogen low-nickel copper-free austenitic stainless steel |
| CN112063936B (en) * | 2020-08-05 | 2022-06-03 | 广西柳钢中金不锈钢有限公司 | High-nitrogen low-nickel copper-free austenitic stainless steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102392186B (en) | Manufacturing method of HB500 grade low-manganese wear-resistant steel plate | |
| CN102605284B (en) | Duplex stainless steel and manufacturing method thereof | |
| CN101613840B (en) | Extra-thick steel plate with excellent strength-toughness matching and high-temperature performance and manufacturing method thereof | |
| CN109563581A (en) | Oil well high-strength stainless steel seamless steel tube and its manufacturing method | |
| CN101353766B (en) | Grooving corrosion resistant high strength steel for ERW soldering sleeve, sleeve and production method | |
| CN103131962A (en) | High-tenacity low-alloy high-strength steel and quenched-tempered heat treatment method thereof | |
| CN101691640A (en) | High strength low alloy wear resistance steel plate and preparation method thereof | |
| CN101768702A (en) | Medium-chromium ferrite stainless steel for automobile with high formability and acidic corrosion resistance as well as manufacturing method thereof | |
| CN102517509A (en) | HB 500-grade wear-resistant steel plate and preparation method thereof | |
| CN105112782A (en) | Low-temperature ferrite LT-FH40 steel plate applied to hot-rolled ships and production method thereof | |
| CN101880833A (en) | A kind of stainless bearing steel adopting rare earth microalloying and its preparation method | |
| CN109852885A (en) | A kind of two phase stainless steel and preparation method thereof | |
| CN105420621A (en) | Austenitic stainless steel used for anti-high-temperature furnace pipe and manufacturing process for plate blank thereof | |
| CN101139688A (en) | Low-cost rare earth chromic manganese nitrogen stainless steel | |
| WO2007029687A1 (en) | Low alloy steel | |
| CN111690875B (en) | Spring steel with good heat-resistant and impact-resistant properties and production method thereof | |
| CN112048668A (en) | High-hardness steel for shield cutter and manufacturing method thereof | |
| CN101565800B (en) | Steel plate with obdurability and strong plasticity and manufacturing method thereof | |
| CN114196872A (en) | High-strength and high-toughness narrow-hardenability 20CrMnTiH gear steel, bar and manufacturing method thereof | |
| WO2024125410A1 (en) | Ultrahigh-strength corrosion-resistant steel and preparation method therefor | |
| WO2024125407A1 (en) | Highly corrosion-resistant oil well steel pipe and preparation method therefor | |
| WO2024125408A1 (en) | Highly corrosion-resistant high-toughness steel and preparation method therefor | |
| JP2024138419A (en) | Stainless steel with excellent cold forgeability and hydrogen embrittlement resistance | |
| CN100545290C (en) | A heat-free ultra-fine-grain D-grade sucker rod steel and its production method | |
| CN101397638A (en) | Ferritic stainless steel for automobile exhaust emission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080312 |