CN102199728A - Complex-phase reinforced rare-earth ferritic stainless steel for construction and manufacturing process thereof - Google Patents
Complex-phase reinforced rare-earth ferritic stainless steel for construction and manufacturing process thereof Download PDFInfo
- Publication number
- CN102199728A CN102199728A CN2010101282859A CN201010128285A CN102199728A CN 102199728 A CN102199728 A CN 102199728A CN 2010101282859 A CN2010101282859 A CN 2010101282859A CN 201010128285 A CN201010128285 A CN 201010128285A CN 102199728 A CN102199728 A CN 102199728A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- earth
- rare
- ferritic stainless
- cold
- 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
Images
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses rare-earth ferritic stainless steel and manufacturing process thereof. The rare-earth ferritic stainless steel comprises the following components in weight proportion: 0.06-0.12% of C, not more than 0.8% of Si, not more than 0.8% of Mn, not more than 0.030% of S, not more than 0.030% of P, not more than 0.3% of Ni, 12.5-16.0% of Cr, not more than 0.3% of Cu, 0.005-0.030% of rare earth and the balance of Fe. According to the rare-earth ferritic stainless steel, a proper amount of martensite structure is formed by optimizing C-Cr ratio in a stainless steel cold-rolled sheet continuous heat treatment process, the purpose of complex-phase reinforcement is achieved by using the martensite structure formed on a ferritic matrix, the tensile strength of a cold-rolled sheet is improved to more than 650MPa, the elongation after break of the cold-rolled sheet is improved to more than 17%, and steel consumption is reduced; and the requirements for molding of corrugated sheets for construction are met by using the rare earth to improve the toughness of the cold-rolled sheet.
Description
Technical field
The present invention relates to a kind of heterogeneous reinforced rare earth stainless steel for building and preparation technology thereof.More specifically, the present invention relates to a kind of heterogeneous reinforced rare earth stainless steel and preparation technology thereof who is used for corrugated panel.
Background technology
Corrugation plate for building mainly utilizes the Q235 steel plate painted method preparation of 0.5mm left and right thickness, stainless steel is used to build corrugated panel must significantly reduces material cost.The main content that reduces alloying element by two kinds of approach first reduces cost; It two is that the intensity that improves material reduces steel using amount.
In chrome ferritic stainless steel comprise AISI430 (1Crl7) and on 430 bases for adapt to rigidity can different demands, further alloying and a series of trades mark of developing.For example, 439 (0Cr17Ti) that add titanium, 435 (0Cr17Nb) that add niobium, 441 (1Cr17TiNb) that add titanium and niobium, 443 (1Crl7Cu) that add copper (0.5%), 434 (1Crl7Mo) that add molybdenum～1% add 433 (1Cr17MOCu) of 436 (1Cr17MoNb) of niobium and molybdenum, the compound adding of copper and contain 444 (1Crl7Mo2) of molybdenum～2% etc. in 434.The working control of carbon amount is 0.040/0～0.05%, and the trades mark such as 441,433,439, carbon content controls to≤0.03% Ultra-low carbon level, plate, band, the brittle transition temperature of tubing and the requirement that intergranular corrosion susceptibility can satisfy application fully of the thin sectional dimension of the modern ferritic stainless steel of chromium in these.Because middle chrome ferritic stainless steel is mainly used in fields such as galley equipment, household electrical appliance, communications and transportation, building interior trim, the surperficial fold problem that therefore improves the cold formability of steel and prevent the deep draw product has caused extensive concern and has furtherd investigate.
Low chrome ferritic stainless steel mainly contains 409 (0Cr11Ti) and modified version 405 (0Crl3A1) thereof, the 410L (00Crl3) and the 3CR12 trades mark such as (00Cr12NiTi).Because these trade mark chrome contents are low, production cost is also low, and price is more cheap relatively, therefore often is called as economic stainless steel; Because their cost is low, the widespread use of getting back in weak corrosive environment often is called as practical stainless steel again.Modern low chrome ferritic stainless steel had both had anti-corrosion, tough, easy-formation, performance such as can weld with it, and the advantage of lower life-cycle cost is arranged again, and in application facet, they are major objective to replace carbon steel etc. usually.0Crl3Al (405), low-carbon (LC) (≤0.05%) also contains small amount of aluminum, has single ferritic structure, and this steel is moulded, good toughness, and cold formability, weldability etc. are also good, and oxidation resistance temperature can reach 700 ℃.Once be used for automobile exhaust system, be mainly used in the purposes such as lining of vapor-nozzle, annealing box, industrial container, tower, groove now.00Cr12NiTi (3Cr12), Ultra-low carbon also contains～1%Ni, is organized as fine ferrite to add～double structure of 10% tempered martensite.This steel also has the characteristics of high strength and erosion resistant except that solidity to corrosion, cold formability and excellent weldability.This steel has been widely used in the multiple use in sugaring, rail vehicle, passenger-carrying chassis and structural part and the urban construction.Because 0CrllTi (409) good corrosion resistance that steel had (waste gas and phlegma), oxidation-resistance (can reach 700 ℃) is moulded, toughness, fatigue resistance, cold formability and weldability, this steel are the preferred material of mobile muffler, vapor pipe, Cat Catalytic Converter housing always.
Above-mentioned ferritic stainless steel is controlled at carbon content≤0.05% level, and further improve the toughness of material by adding carbon in Nb, the Ti fixing base, improve the cold formability and the weldability of sheet material.The reinforcement of material mainly relies on the solid solution and the grain refining of carbon, nitrogen.Some adopt Ultra-low carbon and contain～and 1%Ni forms ferrite and adds～double structure of 10% tempered martensite improves the intensity of material, but these materials are because carbon content is very low, and the tensile strength after anneal is less than 500MPa.
Carbon content is between 0.001～0.01% for " ferritic stainless steel that calendering formation and operability are good and the manufacture method thereof " of patent application CN1491290A invention, and intensity is less than 450MPa.Its stainless steel does not adopt heterogeneous reinforced, and material does not contain rare earth, does not use continuous heat treatment technology yet, and is used for the field of household appliances of calendering formation class.
" a kind of rare-earth ferrite stainless steel that adds " of patent application CN1376808A invention adds rare earth and constitutes on 00Crl3Ti (Nb) basis, be mainly used in industries such as oil, chemical industry, electric power.The carbon content of material is utilized the erosion resistance and the impelling strength of rare earth control inclusion morphology raising steel less than 0.06%, and prevents fragility by silicon, the manganese content that reduces material.Wherein do not adopt heterogeneous reinforcedly, do not use continuous heat treatment technology yet.
" a kind of production method of the anti-bacteria stainless steel based on common ferritic stainless steel " of patent application CN1261409A invention; " ferritic stainless steel alloy and as the purposes of substrate for catalytic converters " of patent application CN1978692A invention; " a kind of rare-earth ferrite stainless steel that adds " of patent application CN1942599A invention; " the middle chromium rare earth-containing ferrite wrinkle-resistant stainless steel alloy and the manufacture method thereof " of patent application CN101178439A invention is little with relational degree of the present invention.
Summary of the invention
The present invention is based on the moulding of building materials corrugated panel and cost requirement and carries out composition and technological design.In the present cold rolling production process of ferritic stainless steel, martensitic content is strictly controlled, and mainly is to prevent that the too high deep drawability of material of giving of martensite content from bringing disadvantageous effect.In addition, main bell jar stove or the continuous annealing furnace of adopting in most of ferritic stainless steel heat place carries out anneal, and thermal treatment temp is between 700 ℃～850 ℃, and Tensile strength intensity is less than 500MPa.Yet the inventor finds the corrugated panel raw materials for production of ferritic stainless steel cold-rolled steel sheet as no deep-draw processing, in cold-reduced sheet continuous heat treatment process, form an amount of martensitic stucture by optimization carbon chromium proportioning and can reach heterogeneous reinforced purpose, the tensile strength of cold-reduced sheet is brought up to more than the 650MPa, thus the steel using amount in the production of minimizing corrugated panel.In addition, further utilize rare earth to improve the toughness of cold-reduced sheet, satisfy corrugation sheet metal forming for building requirement.
Rare-earth ferrite stainless steel of the present invention comprises by weight: C0.06～0.12%, Si≤0.8%, Mn≤0.8%, S≤0.030%, P≤0.030%, Ni≤0.3%, Cr 12.5～16.0%, Cu≤0.3%, rare earth 0.005～0.030 surplus are Fe.
Its middle-weight rare earths is not particularly limited, but preferably adopts cerium.
Described rare-earth ferrite stainless steel preferably forms the martensitic stucture of 5-25% on ferrite matrix, more preferably form the martensitic stucture of 10-20%.
Described rare-earth ferrite stainless steel tensile strength is that 650MPa is above, elongation after fracture is more than 17%.
Described rare-earth ferrite stainless steel is by carrying out continuous heat treatment under 900～1100 ℃, drawstring 9-15m/min, anti-oxidation condition.Preferred employing is air-cooled.Described temperature most preferably is 1050 ℃, drawstring speed and elects 12m/min most as.
Rare-earth ferrite stainless steel of the present invention is applied to build in corrugated panel or the decorative panel for building.
Description of drawings
Fig. 1 sample 1 is handled through continuous heat treating furnace, metallograph under 1050 ℃, drawstring 12m/min condition.
Fig. 2 sample 1 is handled through continuous heat treating furnace, transmission electron microscope photo under 1050 ℃, drawstring 12m/min condition.
Fig. 3 sample 2 is handled through continuous heat treating furnace, metallograph under 1050 ℃, drawstring 12m/min condition.
Fig. 4 sample 2 is handled through continuous heat treating furnace, transmission electron microscope photo under 1050 ℃, drawstring 12m/min condition.
Fig. 5 check sample 1 adopts the bell jar annealing furnace to handle metallograph under 850 ℃ of conditions.
Fig. 6 check sample 1 adopts the bell jar annealing furnace to handle metallograph under 850 ℃ of conditions.
Embodiment
Further specify advantage of the present invention and effect with specific embodiment below.
With heat size 100kg medium-frequency induction furnace is example, with basic raw material and adjustment composition, slag making, required starting material, the mould baking processing of deoxidation, then basic raw material is put into stove before smelting, and begins to smelt.Temperature after melting fully 〉=1580 ℃ adds refining agent deoxidation, sulphur, and should treat that deoxygenation added deslagging agent after 5～10 minutes, skimmed after a while this moment.After slagging-off was handled, temperature reached 1630 ℃～1650 ℃, can do insulation slightly, can tap.Be cast into 80 kilograms rolling steel ingot to treat rolling processing by uphill casting casting mode, the chemical ingredients of the sample 1 of making, sample 2, check sample 1, check sample 2 sees Table 1.
Table 1 sample chemical ingredients (massfraction/%)
| C | P | S | Si | Mn | Cr | Ni | Cu | Re | Fe | |
| Sample 1 | 0.062 | 0.03 | 0.025 | 0.5 | 0.6 | 12.5 | 0.25 | 0.25 | 0.003 | Surplus |
| Sample 2 | 0.12 | 0.03 | 0.025 | 0.6 | 0.5 | 15.8 | 0.25 | 0.25 | 0.03 | Surplus |
| Check sample 1 | 0.05 | 0.028 | 0.032 | 0.6 | 0.4 | 12.7 | 0.3 | - | 0.05 | Surplus |
| Check sample 2 | 0.10 | 0.03 | 0.025 | 0.6 | 0.5 | 16.2 | - | - | - | Surplus |
With the steel billet of above-mentioned sample the roll coil of strip by hot rolling, cold rolling one-tenth 0.40mm～0.42mm, the continuous heat treating furnace that utilizes Inner Mongolia Huaye Special Steel Co., Ltd. is at 850 ℃～1150 ℃, to handle respectively under the drawstring speed of 12m/min, the anti-oxidation and air-cooled condition, as embodiment 1-6 and Comparative Examples 1-6.
The material property of Jia Gong each embodiment sees Table 2 thus.
Mechanical property under the different continuous heat treatment processing condition of table 2 cold-reduced sheet
In the last table, Rm represents tensile strength, Rp
0.2Expression regulation disproportional unit elongation is 0.2% o'clock a stress, and A represents elongation after fracture.More than adopt " metallic substance tensile test at room temperature method " (GB/T228-2002) to measure.
From 6 embodiment as can be seen, under the drawstring speed of 12m/min, when furnace temperature is 850 ℃, sample 1, sample 2, check sample 2 tensile strength are all more than 850MPa, elongation after fracture is less than 10%, can not satisfy the moulding requirement of corrugation plate for building, check sample 1 does not reach service requirements because the low tensile strength of carbon content is lower than 550MPa.
Sample 1, sample 2 tensile strength are greater than 650MPa, less than 700MPa when temperature is 1050 ℃, elongation after fracture is greater than 17%, can satisfy the moulding requirement of corrugation plate for building, check sample 1 does not reach service requirements because the low tensile strength of carbon content is lower than 550MPa, and check sample 2 elongation after fracture are less than the 14% moulding requirement that can not satisfy corrugation plate for building; And comparing embodiment 3, embodiment 4, Comparative Examples 3 can be found to add, and rare earth can satisfy that tensile strength is that 650MPa is above, elongation after fracture is greater than 17%, and Comparative Examples 4 does not add the rare earth elongation after fracture less than 13%.
When temperature is that 1150 ℃ of samples 1 of the present invention, sample 2, check sample 1, check sample 2 tensile strength are lower than 550MPa and do not reach service requirements.
According to preparation sample 1 and the performance analysis of sample 2 under condition of different temperatures, sample 1 and sample 2 can satisfy target call of the present invention under the drawstring speed of 1050 ℃ and 12m/min, therefore a his-and-hers watches 2 embodiment 3 and embodiment 4 carry out metallographic and transmission electron microscope observing, determine martensitic content among table 2 embodiment 3 and the embodiment 4, from Fig. 1, Fig. 2, Fig. 3, Fig. 4 sample 1 of the present invention as can be seen and sample 2, have about 15% martensite.And check sample 1, check sample 2 adopts is the bell jar annealing furnace, and heat-treatment temperature range is between 700 ℃～850 ℃, and martensitic content is less than 5%, does not utilize heterogeneous reinforcedly, and metallograph is seen Fig. 5, Fig. 6.
More than by specific embodiment the present invention has been described, but the present invention is not limited to this.Those of ordinary skills can make amendment to the present invention according to actual needs and not deviate from spirit of the present invention and as the desired scope of claim.
Claims (9)
1. rare-earth ferrite stainless steel, comprise by weight: C0.06～0.12%, Si≤0.8%, Mn≤0.8%, S≤0.030%, P≤0.030%, Ni≤0.3%, Cr 12.5～16.0%, Cu≤0.3%, rare earth 0.005～0.030 surplus are Fe.
2. as claims 1 described rare-earth ferrite stainless steel, has the martensitic stucture that on ferrite matrix, forms 5-25%.
3. as claims 1 described rare-earth ferrite stainless steel, its tensile strength is that 650MPa is above, elongation after fracture is more than 17%.
4. as power claim 1 described rare-earth ferrite stainless steel, by under the drawstring speed of 900 ℃-1100 ℃ temperature, 9-15m/min, the continuous heat treatment of carrying out in anti-oxidation atmosphere prepares in cold rolling back.
5. as power claim 4 described rare-earth ferrite stainless steels, wherein said temperature is that 1050 ℃, drawstring speed are 12m/min.
6. one kind as any stainless preparation method of described rare-earth ferrite among claims 1-3, comprising in cold rolling back in 900 ℃-1100 ℃ temperature range, carry out the step of continuous heat treatment under the condition of drawstring speed 9-15m/min and anti-oxidation atmosphere.
7. as claims 6 described preparation methods, adopt air-cooled in the wherein said continuous heat treatment step.
8. as claims 6 described preparation methods, wherein under 1050 ℃, the drawstring speed of 12m/min, carry out described continuous heat treatment.
9. as the application of any described rare-earth ferrite stainless steel among claims 1-5 in building corrugated panel or decorative panel for building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101282859A CN102199728A (en) | 2010-03-22 | 2010-03-22 | Complex-phase reinforced rare-earth ferritic stainless steel for construction and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101282859A CN102199728A (en) | 2010-03-22 | 2010-03-22 | Complex-phase reinforced rare-earth ferritic stainless steel for construction and manufacturing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102199728A true CN102199728A (en) | 2011-09-28 |
Family
ID=44660709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101282859A Pending CN102199728A (en) | 2010-03-22 | 2010-03-22 | Complex-phase reinforced rare-earth ferritic stainless steel for construction and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102199728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115244207A (en) * | 2020-04-10 | 2022-10-25 | 日铁不锈钢株式会社 | Ferritic stainless steel and method for producing ferritic stainless steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105993A (en) * | 1986-12-30 | 1988-07-13 | 日新制钢株式会社 | The production method of the stainless cr-steel band of the double structure of high strength, high ductility and low degree nonuniformity |
| JPH11193448A (en) * | 1998-01-05 | 1999-07-21 | Nkk Corp | Clad steel tube |
| CN1376808A (en) * | 2001-12-18 | 2002-10-30 | 束润涛 | Stainless ferrite steel containing rare earth |
| CN1702187A (en) * | 2004-05-24 | 2005-11-30 | 潘传洪 | Ferritic rare earth alloy steel with strong anti-stress corrosion capability and heat exchanger, air cooler made of the same |
| CN1807672A (en) * | 2006-02-17 | 2006-07-26 | 太原钢铁(集团)有限公司 | Middle content chromium copper, iron-containing antiseptic anticreas rustless steel sheet belt and its production method |
| CN101168822A (en) * | 2006-10-23 | 2008-04-30 | 宝山钢铁股份有限公司 | High ductility nickel-free ferrite stainless steel and manufacturing method thereof |
-
2010
- 2010-03-22 CN CN2010101282859A patent/CN102199728A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105993A (en) * | 1986-12-30 | 1988-07-13 | 日新制钢株式会社 | The production method of the stainless cr-steel band of the double structure of high strength, high ductility and low degree nonuniformity |
| JPH11193448A (en) * | 1998-01-05 | 1999-07-21 | Nkk Corp | Clad steel tube |
| CN1376808A (en) * | 2001-12-18 | 2002-10-30 | 束润涛 | Stainless ferrite steel containing rare earth |
| CN1702187A (en) * | 2004-05-24 | 2005-11-30 | 潘传洪 | Ferritic rare earth alloy steel with strong anti-stress corrosion capability and heat exchanger, air cooler made of the same |
| CN1807672A (en) * | 2006-02-17 | 2006-07-26 | 太原钢铁(集团)有限公司 | Middle content chromium copper, iron-containing antiseptic anticreas rustless steel sheet belt and its production method |
| CN101168822A (en) * | 2006-10-23 | 2008-04-30 | 宝山钢铁股份有限公司 | High ductility nickel-free ferrite stainless steel and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《上海钢研》 19990228 黄元恒 近年来国外不锈钢发展状况 37-48 9 , * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115244207A (en) * | 2020-04-10 | 2022-10-25 | 日铁不锈钢株式会社 | Ferritic stainless steel and method for producing ferritic stainless steel |
| CN115244207B (en) * | 2020-04-10 | 2023-09-19 | 日铁不锈钢株式会社 | Ferritic stainless steel and method for producing ferritic stainless steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6475861B2 (en) | Steel plates used for hot stamping, hot stamping process and hot stamping components | |
| CN103614640B (en) | A kind of non-coating hot press-formed steel of resistance to high temperature oxidation | |
| CN102758133B (en) | 1000MPa-level automobile steel with high product of strength and elongation and manufacturing method thereof | |
| CN101348884B (en) | 440MPa grade niobium-containing high-strength IF steel and manufacturing method thereof | |
| CN111057940B (en) | Method for manufacturing cold-rolled low-carbon enamel steel for household appliances | |
| CN102453843B (en) | Ferrite heat resistant steel | |
| CN101248205A (en) | Martensitic stainless steel composition, method for making amechanical part from said steel and resulting part | |
| CN114369768A (en) | Steel material for hot press forming, hot press forming process, and formed member | |
| CN104169444A (en) | High strength cold rolled steel sheet and method of producing such steel sheet | |
| CN105385939A (en) | Manufacturing method of high-strength high-tenacity alloy steel | |
| WO2020001430A1 (en) | Ultrahigh-strength hot-rolled steel sheet and steel strip having good fatigue and reaming properties and manufacturing method therefor | |
| CN105803334B (en) | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method | |
| CN105441786B (en) | Tensile strength 1500MPa grades of hot press-formed use sheet metal and its CSP production methods | |
| CN105950984B (en) | Tensile strength 650MPa level hot rolling Multiphase Steels and its production method | |
| CN110438402B (en) | 1000 Mpa-grade sulfuric acid dew point corrosion resistant bolt steel and preparation method thereof | |
| CN101348883A (en) | Niobium and titanium composite added ultra-low carbon baking hardening steel plate and manufacturing method thereof | |
| CN104862592A (en) | Super deep-draw fingerprint resistant electro-galvanized plate and manufacturing method thereof | |
| CN110343971B (en) | Ultrahigh-strength hot-galvanized complex-phase steel and production method thereof | |
| CN101935806B (en) | Low-carbon bainitic cold-work-strengthened non-quenched and tempered steel with excellent delayed fracture resistance | |
| CN101302600B (en) | Boron micro-alloying low-carbon two-phase steel produced by hot continuous rolling process and its preparation method | |
| CN104350166B (en) | The high silicon bearing dual phase steel of ductility with raising | |
| CN110055470B (en) | Container corner fitting and heat treatment process thereof | |
| CN102199728A (en) | Complex-phase reinforced rare-earth ferritic stainless steel for construction and manufacturing process thereof | |
| CN111424215B (en) | Cold-rolled low-carbon enamel steel for household appliances | |
| CN102321844A (en) | Hot-rolled corrosion-resistant baking-hardened steel and preparation method thereof |
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 |
Application publication date: 20110928 |