CN1051583C - Austenitic stainless steel for making screen mesh - Google Patents
Austenitic stainless steel for making screen mesh Download PDFInfo
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- CN1051583C CN1051583C CN 92106944 CN92106944A CN1051583C CN 1051583 C CN1051583 C CN 1051583C CN 92106944 CN92106944 CN 92106944 CN 92106944 A CN92106944 A CN 92106944A CN 1051583 C CN1051583 C CN 1051583C
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- austenitic stainless
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Abstract
The present invention relates to austenitic stainless steel for making screen meshes, which has the chemical components (weight percentage): 0.10 to 0.20 of carbon, 15.5 to 17.5 of chromium, 11.0 to 13.0 of manganese, 1.0 to 2.8 of nickel, 0.20 to 0.30 of nitrogen, 0 to 1.3 of copper and iron and inevitable impurities as the rest. Screen meshes made of the austenitic stainless steel have the characteristics of high strength, good wear resistance, strong corrosion resistance, no magnetism, etc. The present invention is suitable for fine sieving and classification for various hard and middle hard materials, and is particularly suitable for closed circuit grinding classification of mine plant selection and washing and slag separative operation. The service life of the screen sieves made of the materials of the present invention is from 0.7 to 1.1 times longer than that of the existing screen sieves made of 1Cr18Ni9Ti austenitic stainless steel.
Description
The invention belongs to field of Austenitic stainless steel, mainly be applicable to and make the strong screen cloth of wear resistant corrosion resistant.
At present, both at home and abroad on the material screening industry used screen cloth mainly be to adopt steel or copper alloy made.For rigid, in hard and have certain corrosive material screening, then more adopt chromium-nickel austenitic stainless steels (see that N.L.Weiss writes " SME Mineral Processing Handbook " Vol.1,1985, P3E-31).For example the 1Cr18Ni9Ti austenitic stainless steel of domestic use and the external 18-8 type chromium-nickel austenitic stainless steel that generally uses.Though this class stainless steel mesh good corrosion resistance, intensity and hardness are not high, wear no resistance.Domestic also useful nylon sieve grate, but can not guarantee its sieve size.Though no magnetic austenitic stainless steel had similarly report abroad, be mainly used in the oil well the drilling industry, and its chemical constitution also had difference (seeing US4502886).
The objective of the invention is to, provide a kind of high strength, wear-resisting, corrosion resistant no magnetic austenitic stainless steel to make screen cloth, so that improve the wear-resistant and erosion resistance of screen cloth, reach its work-ing life of prolongation and prolong the replacement cycle of screen cloth and the purpose that reduces production costs.
Technical scheme of the present invention is: the concrete chemical ingredients (weight percent) of austenitic stainless steel is as follows: carbon 0.10-0.20%, chromium 15.5-17.5%, manganese 11.0-13.0%, nickel 1.0-2.8%, nitrogen 0.20-0.29%, copper 0.80-1.3%, surplus is iron and unavoidable impurities.Name shaped steel for CN-1.
Manufacturing process of the present invention is fairly simple, is summarized as follows: at first adopt electric furnace with starting material (low-carbon (LC) pure iron, contain nitrogenous ferrochrome, chromium metal, electrolytic manganese, electrolytic copper and electrolytic nickel) melting; Ingot blank after forge hot, hot rolling, annealing, pickling, the filament of the required specification of cold drawn one-tenth netting.
The main alloying constituent and the effect thereof of CN-1 shaped steel of the present invention are:
Carbon is the element of strong formation and stable austenite, improves stainless intensity and wear resistance, but reduces erosion resistance, and test shows that carbon content should be controlled at 0.10-0.20 weight %.Nitrogen also is strong formation and the element of stable austenite, improves stainless intensity and wear resistance, and with the nitrogen content increase, work hardening rate obviously increases, and ingot casting may produce bubble, and test shows that the nitrogen content optimum range is 0.20-0.29 weight %.Chromium is the corrosion proof principal element of decision, and can increase the solubleness of nitrogen, but chromium is the element that dwindles the r district, and test shows that chromium content optimum range is 15.5-17.5 weight %.Manganese is the element of stable austenite, increases the solubleness of nitrogen in steel, and manganese is too high will to influence processing characteristics, and test shows that the content of manganese should be controlled at 11.0-13.0 weight %.Nickel is to form austenitic element, improves stainless corrosion resistance and processing characteristics, but reduces intensity and hardness, and test shows that nickel content optimum range is 1.0-2.8 weight %.Copper is more weak austenite former, can improve stabilization of austenite, improves erosion resistance and processing characteristics, but reduces intensity and hardness, and the effect that copper reduces work hardening rate is that significantly test shows that copper content can be controlled in 0.80-1.3 weight %.
Embodiment: CN-1 shaped steel of the present invention designs by above-mentioned chemical ingredients scope.In the 10kg induction furnace melting tens of stove steel.The chemical ingredients of now enumerating 2 stove steel is shown in table 1.
The chemical ingredients of table 1 CN-1 shaped steel for example
| Heat (batch) number | Chemical ingredients (weight) % | |||||
| Cr | Mn | Ni | C | N | Cu | |
| 608 | 16.70 | 11.62 | 2.70 | 0.10 | 0.23 | 0.80 |
| 109 | 17.20 | 11.30 | 2.68 | 0.12 | 0.26 | 1.30 |
After the melting, molten steel casting becomes steel ingot, and ingot blank is through 1100-1200 ℃ of forge hot, hot rolling, 1050-1100 ℃ annealing.The following filament of cold drawn one-tenth Ф 0.5mm after the pickling, the netting steel wire adopts protective atmosphere annealing, at last by national standard specification woven screen.
Compare with the 1Cr18Ni9Ti austenitic stainless steel, the mechanical property of CN-1 shaped steel of the present invention sees Table 2.
Table 2 mechanical property (solid solution attitude)
| Title material | σbMPa | σsMPa | δ％ | HRB |
| Cn-1 shaped steel | 755-784 | 402-427 | 55-60 | 90-95 |
| 1Cr18Ni9Ti | 539 | 196 | 40 | 80 |
Measure permeability with the magnetic balance method, permeability is less than 1.003 under the solution treatment state.After the cold deformation 50%, permeability is less than 1.03.109# steel in the table 1, after the cold deformation 70%, permeability is 1.002; The wear resistance of CN-1 shaped steel of the present invention is compared with the 1Cr18Ni9Ti austenitic stainless steel with the test of ML-10 type pin disc type wear testing machine, and relative wear weightlessness is 0.82-0.84: 1; CN-1 shaped steel stress corrosion performance is as follows: with sample at 42%MgCl
2After boiling 60 hours in the aqueous solution, show no macrocrack, amplify 320 times and could observe tiny crack in the distorted area, and after the 1Cr18Ni9Ti sample boils 6 hours, crackle promptly occurs, after 10 hours, crackle runs through specimen surface.
When being applied to some metallic ore screening and classification, if get damaged area 1000mm with CN-1 section steel manufacture aperture 0.45mm of the present invention and two kinds of fine screen mesh of aperture 0.236mm
2Duration of service as work-ing life of screen cloth, as shown in Figure 1, be 1460 hours the work-ing life of CN-1 shaped steel screen cloth (aperture 0.236mm), and the 1Cr18Ni9Ti screen cloth only is 860 hours, the former work-ing life is longer 0.7 times than the latter.When making aperture 0.45mm screen cloth and use above-mentioned ore sizing and classification with CN-1 shaped steel, as shown in Figure 2, be 2360 hours the work-ing life of CN-1 shaped steel matter screen cloth, and 1Cr18Ni9Ti steel screen cloth only used 1120 hours, and the former work-ing life is longer 1.1 times than the latter.
Advantage of the present invention is: the characteristics such as the screen cloth with CN-1 section steel manufacture of the present invention has the intensity height, wearability is good, corrosion resistance by force, is easily processed and nonmagnetic, be applicable to the meticulous screening of various rigid, middle hard material and classification, be adapted to especially mine concentrator closed circuit grinding classification and washing every the slag operation. CN-1 shaped steel of the present invention is applicable to all industrial screenings and the fine grading occasion that 1Cr18Ni9Ti steel screen cloth uses fully, as being used for resembling screening and the graded operation of other similar rigid and hard material of abrasive material, quartz sand etc.
Claims (1)
1. a profit is the screen cloth austenitic stainless steel of main component by carbon, manganese, chromium, nickel, nitrogen, copper, it is characterized in that: the chemical ingredients of this alloy (weight percent) is: carbon is 0.10-0.20%.Chromium is 15.5-17.5%, and manganese is 11.0-13.0%, and nickel is 1.0-2.8%, and nitrogen is 0.20-0.29%, and copper is 0.80-1.3%, and surplus is iron and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106944 CN1051583C (en) | 1992-05-28 | 1992-05-28 | Austenitic stainless steel for making screen mesh |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106944 CN1051583C (en) | 1992-05-28 | 1992-05-28 | Austenitic stainless steel for making screen mesh |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1079260A CN1079260A (en) | 1993-12-08 |
| CN1051583C true CN1051583C (en) | 2000-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106944 Expired - Fee Related CN1051583C (en) | 1992-05-28 | 1992-05-28 | Austenitic stainless steel for making screen mesh |
Country Status (1)
| Country | Link |
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| CN (1) | CN1051583C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716573B (en) * | 2008-10-09 | 2014-05-07 | 株式会社奥普特尼克斯精密 | Sieve, sieve device, solder ball and method for sieving spherical particles |
| CN101886225B (en) * | 2010-07-07 | 2013-01-16 | 南京信息工程大学 | Corrosion-resistant and abrasion-resistant steel and preparation method thereof |
| CN103266283A (en) * | 2013-05-17 | 2013-08-28 | 江苏星火特钢有限公司 | Non-magnetic stainless steel for ore selection equipment |
| CN105200339B (en) * | 2015-09-18 | 2017-04-12 | 江苏省利金新材科技有限公司 | High-nitrogen abrasion-resistant stainless steel griddle wire processing technology |
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1992
- 1992-05-28 CN CN 92106944 patent/CN1051583C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1079260A (en) | 1993-12-08 |
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