CN106957996B - A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn - Google Patents
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
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- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
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- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
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Abstract
The present invention provides a kind of preparation methods of the cold-reduced sheet of super austenitic stainless steel containing Sn, belong to super austenitic stainless steel technical field.Preparation process is：(1) according to the composition proportion of super austenitic stainless steel, the Sn that additional mass fraction is 0.05~0.5% weighs raw material, and substep, which is put into vaccum sensitive stove, to be smelted to obtain molten steel；(2) under high pure nitrogen protection, molten steel is poured into and carries out casting in double roll strip casting mill, obtains the original thin band of super austenitic stainless steel containing Sn；(3) combined producing tech that original thin band is carried out to " a time skin pass rolling+Homogenization Treatments+control single pass heavy deformation and total deformation ", is prepared the cold rolling panel products of Cast Strip.Strip prepared by the present invention can inhibit the center segregation of alloying element, and band-like microstructure is less prone in its cold-reduced sheet, and the performance of cold-reduced sheet is superior to the performance of conventional products.
Description
Technical field
The invention belongs to super austenitic stainless steel preparation field, more particularly to a kind of super austenitic stainless steel containing Sn is cold
Roll the preparation method of plate.
Background technology
Super austenitic stainless steel is it in the industries extensive use such as oil, chemical industry, papermaking, food, pipeline, high-alloying
The overall content of the most important feature of ingredient, the wherein alloying elements such as Cr, Ni, Mo is up to 50% or so, even higher, high alloy
It turns to its excellent performance and provides guarantee, while also considerably increasing production cost and manufacture difficulty.Currently, super austenitic
The manufacture of stainless steel is primarily present problems with, first, alloying element is expensive, and China is a scarce nickel, lacks molybdenum, is poor
The country of chromium, so the source supply of raw material is largely under one's control；Second is that alloying element content is high, it is tired to smelt cast
Difficulty, in conventional production methods, center segregation is unavoidable, time consumption and energy consumption during subsequent high temperature homogenization, and is rolling
In deformation process, the problem of being susceptible to layering and crack, manufacturing cost is greatly improved；Third, high alloy constituent content,
Resistance of deformation is caused to increase, processing technology windows narrow uses product from conventional strand to final, and processing route is long, the energy
The problem of environmental pollution for consuming and its bringing aggravates；Fourth, the autonomous life of the domestic product for super austenitic stainless steel at present
It is also immature to produce manufacturing technology, is largely dependent upon import.The main reason for causing the above problem is old process production
When strand, center segregation causes Mo, Cr to be enriched in central area, and the alloying element whole content on surface layer reduces, but product sheet
Body plays the role of corrosion-resistant exactly its surface layer.So the segregation of alloying element is inhibited to become the key to solve the above problems
Place.The replacement thought of element is frequently applied on steel grades and optimizing components, current study show that, add in stainless steel
The Sn elements of certain content are added to can aid in the corrosion resistance for increasing stainless steel, and the source of Sn elements is wider, cost
It is relatively low.If Sn elements can play synergistic effect with Mo elements in terms of the corrosion resistance in super austenitic stainless steel,
The overall corrosion resistance energy that super austenitic stainless steel can not only be improved, can also reduce the additive amount of Mo elements.
Addition Sn elements, the shape near surface layer in casting ferritic stainless steel are disclosed in patent CN 102274937A
At the enrichment region of Sn, corrosion resistance can be improved, due in the ferrite and not containing Mo elements, and not with super austenitic
The element species of steel of becoming rusty and content are very different, therefore can not predict influences of the Sn on the influence of Mo contents and its to corrosion resistance.
A kind of low cost and high corrosion resistance capability ferritic stainless steel containing Sn and its manufacturing method are disclosed in patent CN 106244811A, although
Wherein contain 0 ~ 1.0%Mo, but still differ greatly with the Mo contents in super austenitic stainless steel, can not be super austenitic
Substantive guidance is made in influence of the addition of Sn to other alloying elements and tissue and performance in stainless steel.
Invention content
For problem is prepared existing for existing super austenitic stainless steel, the present invention provides one kind super austenitic containing Sn not
The preparation method of rust steel cold-reduced sheet.
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：To contain super austenitic stainless steel that Sn mass percents are 0.05 ~ 0.5% as base stock, will claim
Good raw material 120 ~ 180min of heating, drying under the conditions of 50 ~ 100 DEG C, wherein the composition quality hundred of super austenitic stainless steel
Point ratio is：C≤0.03%, N 0.18 ~ 0.25%, Si≤1.0%, Cu≤1.0%, Mn≤2.0%, Mo 6 ~ 8%,
Cr 20 ~ 22%, Ni 23.5 ~ 25.5%, surplus are Fe and inevitable impurity, wherein P≤0.04%, S≤
0.03%, O≤0.005%；Raw material is classified, is put into vacuum induction melting furnace step by step, in the high vacuum that vacuum degree is 4 ~ 5 Pa
It is smelted under environment, obtains molten steel, wherein N is added in the form of nitrided ferro-chromium, and Sn, Mn and nitrided ferro-chromium are molten in other raw materials
It is sequentially added after changing completely；
（2）Cast：By pouring temperature control between 1500 ~ 1600 DEG C, under the protection of high-purity nitrogen, it will smelt
Molten steel poured into through tundish and carry out casting in the molten bath in double roll strip casting mill, with the rotation of casting roll, the gradual shape in Cast Strip
At it is 2.5-4 mm that thickness, which is prepared, and width is the near-net-shape super austenitic stainless steel strip of 110-254mm, wherein casting
It is 35 ~ 55m/min, 45 ~ 65kN of casting-rolling force to roll speed；
（3）Skin pass rolling：By the above-mentioned near-net-shape super austenitic stainless steel strip being prepared be sent to two roll out it is whole
Milling train, the temperature of strip is between 1050 ~ 1150 DEG C at this time, and in the temperature range, strip is carried out a time skin pass rolling,
Rolling reduction is 12.5% ~ 20%, obtains that thickness is 2 ~ 3.5mm, template is good and solidified structure has and deforms to a certain degree
Then strip is crimped；
（4）Homogenization Treatments：By the strip of above-mentioned skin pass rolling under the protection of high-purity Ar or in vacuum environment into
The processing of row high-temperature homogenization, is then quenched to room temperature.Wherein, the temperature of Homogenization Treatments be 1150 ~ 1250 DEG C, the time be 30 ~
120min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 5.7% ~ 20%, total to become
Shape amount is 40 ~ 85.7%, and the super austenitic stainless steel strip cold-reduced sheet that thickness is 0.5 ~ 1.2mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment and then is quenched to room temperature, then test its mechanical property and
Corrosion resistance.Wherein, annealing temperature is 1000 ~ 1100 DEG C, and processing time is 5 ~ 20min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention be 771 ~ 788MPa, yield strength be 375 ~
390MPa, elongation percentage are 47 ~ 49%, and spot corrosion point is 1.00 ~ 1.05 V.
The features of the present invention and meaning are：
1. the present invention on the component base based on super austenitic stainless steel, by adding certain content Sn elements, adopts
With the thin band continuous casting technique in advanced short route, the super austenitic stainless steel that non-stop layer segregation phenomena has been prepared is thin
Band.The Sn elements of certain content are added to, synergistic effect is played with the Mo elements in alloy, improves original super austenitic not
The corrosion resistance of rust steel product, while ensure that its mechanical property.In addition, under the premise of ensureing identical corrosion resistance,
The injected volume of Mo elements when can reduce steel-making reduces the manufacturing cost of possibility and product that segregation generates.
2. the present invention proposes progress " a time skin pass rolling+Homogenization Treatments+control single pass heavy deformation on Cast Strip
And total deformation " controlled rolling and control heat treatment thinking.In strip casting process, it is limited by the occlusion journey of side seal board and casting roll
Degree, Cast Strip edge, which generates more protrusion and out-of-flatness part, skin pass rolling, can improve template, take the lead and edge is more straight
With it is regular, be conducive to curling and follow-up deep processing；Skin pass rolling can also destroy solidified structure, introduce a certain amount of distortion and
Dislocation can accelerate diffusion and the homogenization of alloying element to provide more channels for the diffusion of alloying element, reduce equal
It homogenizes the temperature of processing and shortens the time of Homogenization Treatments, reduce energy consumption, while having refined tissue to a certain extent.
3. the present invention is kept away in the process for preparing strip cold-reduced sheet by rationally controlling single pass heavy deformation and total deformation
Exempt to form cold-reduced sheet in edge or the risk of road surface crocking because deflection is excessive, has improved the lumber recovery of strip cold-reduced sheet, be
Follow-up study works and realizes that industrial production provides experimental data and theory support.Meanwhile cold rolling panel products are prepared by strip,
For more conventional production technology, greatly reduce its compression deformation, production process route is short, significantly reduce production and
Manufacturing cost.
Description of the drawings
Fig. 1 is the strip of super austenitic stainless steel containing Sn prepared by embodiment 1；
Fig. 2 is the strip of super austenitic stainless steel containing Sn after flattened rolling prepared by embodiment 1, and plate shape is good,
Without edge and face crack；
Fig. 3 is in embodiment 1 beyond the edge and face crack for rolling appearance after deflection；
Fig. 4 be embodiment 1 prepare the strip cold-reduced sheet of super austenitic stainless steel containing Sn, plate shape is good, no edge and in
Heart shake line；
Fig. 5 be embodiment 1 prepare the cold-reduced sheet stress strain curve of super austenitic stainless steel containing Sn, excellent tensile strength with
Fabulous plasticity；
Fig. 6 is the cold-reduced sheet polarization curve of super austenitic stainless steel containing Sn prepared by embodiment 1；
Fig. 7 is the microstructure of the cold-reduced sheet of super austenitic stainless steel containing Sn and conventional cold-reduced sheet prepared by embodiment 1, thin
It is significantly reduced with the banded structure in cold-reduced sheet.
Specific implementation mode
The model ZG-0.05 of the vacuum induction melting furnace used in the present invention；The double roll strip casting mill used is water
Flat, is configured with inner cooling type roller, roller diameter 500mm, and body of roll width is 110 ~ 254 mm；The cold-rolling mill used is straight
Pull-type four-roller reversible cold rolling/warm-rolling experimental mill；The hot-rolling mill used tests hot rolling for Φ 450mm × 450mm two-roller reversible formulas
Machine.
Comparative example：
In the present invention as a comparison case using the cold-reduced sheet of the super austenitic stainless steel strip of traditional handicraft preparation, mainly
Step is：
It is according to mass percent：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 6.0%, Cr
20%, Ni 24%, surplus are Fe and inevitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；It will be former
Material classification, is put into vacuum induction melting furnace step by step, is smelted in the case where vacuum degree is the high vacuum environment of 4 ~ 5Pa, obtains molten steel,
In, N is added in the form of nitrided ferro-chromium, and Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；In nitrogen
Under protection, cast obtains conventional foundry ingot, and ingot casting is heated to hammer cogging after 1250 DEG C of heat preservation 300min, by the strand weight after cogging
It is newly heated to 1200 DEG C and keeps the temperature 120min, carry out hot rolling on Φ 450mm × 450mm two-roller reversible formulas experiment hot-rolling mill, open
It is 1180 DEG C to roll temperature, and finishing temperature is 1050 DEG C, and room temperature is quenched to after obtaining the hot rolled plate that thickness is 5.5mm thickness；Then will
Hot rolled plate keeps the temperature quenching after 30min at 1200 DEG C and completes annealing, and pickling is removed cold in EXPERIMENTAL COLD ROLLING MILL TYPE after iron scale
It rolls, obtains the cold-reduced sheet that thickness is 0.5 ~ 1.2mm thickness.Finally cold-reduced sheet is moved back under the conditions of 1000 ~ 1100 DEG C × 5 ~ 20min again
Fire processing, is then quenched to room temperature, obtains the cold-reduced sheet of the super austenitic stainless steel strip of traditional handicraft preparation.
The specific implementation mode of invention is described in further detail below, but the embodiment of present aspect is without being limited thereto.
Embodiment 1
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.1% is weighed by mass fraction
Sn, by each raw material under the conditions of 80 DEG C heating, drying 140min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 6%, Cr 20%, Ni 24%, surplus is for Fe and not
Evitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum induction step by step
In smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4Pa, obtain molten steel, wherein N is added in the form of nitrided ferro-chromium
Enter, Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1580 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 3mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 110mm, wherein roll casting speed 45m/min, casting
Power is 55kN；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When strip temperature be 1120 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 16.7% obtains
To thickness be 2.5mm, template is good and solidified structure has the strip deformed to a certain degree, be then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1200 DEG C, time 60min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 8% or so, total deformation
Amount is 60%, and the super austenitic stainless steel strip cold-reduced sheet that thickness is 1.0mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1000 DEG C × 15min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 785MPa, and yield strength 388MPa prolongs
It is 48% to stretch rate, and spot corrosion point is 1.01 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 1, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 735MPa, yield strength
For 365MPa, elongation percentage 44%, spot corrosion point is 0.98 V, and the performance of embodiment 1 is superior to the performance of comparative example.
Embodiment 2
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.25% is weighed by mass fraction
Sn, by each raw material under the conditions of 70 DEG C heating, drying 160min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 6.5%, Cr 20%, Ni 24%, surplus be Fe and
Inevitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum sense step by step
It answers in smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 5 Pa, obtain molten steel, wherein N is in the form of nitrided ferro-chromium
It is added, Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1550 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 3.5mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 110mm, wherein roll casting speed 35m/min, casting
It is 55kN to roll power；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When strip temperature be 1080 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 14.3% obtains
To thickness be 3mm, template is good and solidified structure has the strip deformed to a certain degree, be then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1200 DEG C, time 120min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 10% or so, total deformation
Amount is 66.7%, and the super austenitic stainless steel strip cold-reduced sheet that thickness is 1.0mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1050 DEG C × 10min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 788MPa, and yield strength 390MPa prolongs
It is 49% to stretch rate, and spot corrosion point is 1.05 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 2, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 736MPa, yield strength
For 368MPa, elongation percentage 43%, spot corrosion point is 1.00V, and the performance of embodiment 2 is superior to the performance of comparative example.
Embodiment 3
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.05% is weighed by mass fraction
Sn, by each raw material under the conditions of 100 DEG C heating, drying 120min, wherein the composition quality percentage of super austenitic stainless steel
Than for：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 6.0%, Cr 20%, Ni 24%, surplus Fe
With inevitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum step by step
In induction melting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4.5 Pa, obtain molten steel, wherein N is with nitrided ferro-chromium
Form is added, and Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1570 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 2.5mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 254mm, wherein roll casting speed 45m/min, casting
It is 65kN to roll power；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When strip temperature be 1102 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 20% obtains
Thickness is 2.0mm, template is good and solidified structure has the strip deformed to a certain degree, is then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1250 DEG C, time 30min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 5% or so, total deformation
Amount is 40%, and the super austenitic stainless steel strip cold-reduced sheet that thickness is 1.2mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1050 DEG C × 20min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 771MPa, and yield strength 375MPa prolongs
It is 47% to stretch rate, and spot corrosion point is 1.02 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 3, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 732MPa, yield strength
For 364MPa, elongation percentage 44%, spot corrosion point is 1.00 V, and the performance of embodiment 3 is superior to the performance of comparative example.
Embodiment 4
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.4% is weighed by mass fraction
Sn, by each raw material under the conditions of 60 DEG C heating, drying 180min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 7.5%, Cr 20%, Ni 24%, surplus be Fe and
Inevitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum sense step by step
It answers in smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4.8Pa, obtain molten steel, wherein N is the shape with nitrided ferro-chromium
Formula is added, and Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1600 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 3mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 254mm, wherein roll casting speed 55m/min, casting
Power is 60kN；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When Cast Strip temperature be 1108 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 16.7% obtains
To thickness be 2.5mm, template is good and solidified structure has the strip deformed to a certain degree, be then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1250 DEG C, time 30min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 8% or so, total deformation
Amount is 60%, and the super austenitic stainless steel cold-reduced sheet that thickness is 1.0mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1100 DEG C × 15min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 778MPa, and yield strength 380MPa prolongs
It is 48.5% to stretch rate, and spot corrosion point is 1.02 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 4, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 730MPa, yield strength
For 361MPa, elongation percentage 44.7%, spot corrosion point is 1.0 V, and the performance of embodiment 4 is superior to the performance of comparative example.
Embodiment 5
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.5% is weighed by mass fraction
Sn, by each raw material under the conditions of 50 DEG C heating, drying 180min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 7%, Cr 20%, Ni 24%, surplus is for Fe and not
Evitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum induction step by step
In smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4.8Pa, obtain molten steel, wherein N is in the form of nitrided ferro-chromium
It is added, Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1500 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 3mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 254mm, wherein roll casting speed 35m/min, casting
Power is 45kN；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When Cast Strip temperature be 1050 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 16.7% obtains
To thickness be 2.5mm, template is good and solidified structure has the strip deformed to a certain degree, be then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1150 DEG C, time 90min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 8% or so, total deformation
Amount is 60%, and the super austenitic stainless steel cold-reduced sheet that thickness is 1.0mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1000 DEG C × 20min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 788MPa, and yield strength 390MPa prolongs
It is 49% to stretch rate, and spot corrosion point is 1.05 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 5, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 730MPa, yield strength
For 365MPa, elongation percentage 44.7%, spot corrosion point is 1.01 V, and the performance of embodiment 5 is superior to the performance of comparative example.
Embodiment 6
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.15% is weighed by mass fraction
Sn, by each raw material under the conditions of 75 DEG C heating, drying 140min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 8%, Cr 20%, Ni 24%, surplus is for Fe and not
Evitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum induction step by step
In smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4.6Pa, obtain molten steel, wherein N is in the form of nitrided ferro-chromium
It is added, Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1520 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 4mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 150mm, wherein roll casting speed 40m/min, casting
Power is 45kN；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When Cast Strip temperature be 1120 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 12.5% obtains
To thickness be 3.5mm, template is good and solidified structure has the strip deformed to a certain degree, be then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1180 DEG C, time 90min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 8% or so, total deformation
Amount is 65.7%, and the super austenitic stainless steel cold-reduced sheet that thickness is 1.2mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1000 DEG C × 15min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 780MPa, and yield strength 380MPa prolongs
It is 48.5% to stretch rate, and spot corrosion point is 1.05 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 6, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 735MPa, yield strength
For 361MPa, elongation percentage 44%, spot corrosion point is 1.0 V, and the performance of embodiment 6 is superior to the performance of comparative example.
Embodiment 7
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.35% is weighed by mass fraction
Sn, by each raw material under the conditions of 55 DEG C heating, drying 160min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 6.5%, Cr 20%, Ni 24%, surplus be Fe and
Inevitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum sense step by step
It answers in smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4Pa, obtain molten steel, wherein N is in the form of nitrided ferro-chromium
It is added, Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1500 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 3.5mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 200mm, wherein roll casting speed 40m/min, casting
It is 60kN to roll power；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When Cast Strip temperature be 1150 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 20% obtains
Thickness is 2.8mm, template is good and solidified structure has the strip deformed to a certain degree, is then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1220 DEG C, time 40min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 8% or so, total deformation
Amount is 64.3%, and the super austenitic stainless steel cold-reduced sheet that thickness is 1mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1050 DEG C × 15min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 782MPa, and yield strength 380MPa prolongs
It is 48.5% to stretch rate, and spot corrosion point is 1.04 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 7, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 730MPa, yield strength
For 361MPa, elongation percentage 44.7%, spot corrosion point is 0.99 V, and the performance of embodiment 7 is superior to the performance of comparative example.
Embodiment 8
A kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, includes the following steps：
（1）Melting：According to the composition proportion of super austenitic stainless steel, raw material is weighed, and 0.45% is weighed by mass fraction
Sn, by each raw material under the conditions of 70 DEG C heating, drying 140min, wherein the ingredient percent of super austenitic stainless steel
For：C≤0.03%, N 0.2%, Si 0.5%, Cu 0.4%, Mn 1.0%, Mo 6%, Cr 20%, Ni 24%, surplus is for Fe and not
Evitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%；Raw material is classified, is put into vacuum induction step by step
In smelting furnace, is smelted in the case where vacuum degree is the high vacuum environment of 4.6Pa, obtain molten steel, wherein N is in the form of nitrided ferro-chromium
It is added, Sn, Mn and nitrided ferro-chromium sequentially add after the fusing completely of remaining raw material；
（2）Cast：Pouring temperature is controlled at 1520 DEG C, under the protection of high-purity nitrogen, the molten steel smelted is passed through
Tundish pours into progress casting in the molten bath in double roll strip casting mill, and with the rotation of casting roll, Cast Strip gradually forms, and is prepared into
It is 4mm to thickness, width is the strip of super austenitic stainless steel containing Sn of 150mm, wherein roll casting speed 40m/min, casting
Power is 45kN；
（3）Skin pass rolling：The above-mentioned super austenitic stainless steel strip being prepared is sent to two roller planishing mills, this
When Cast Strip temperature be 1120 DEG C, at such a temperature, Cast Strip is subjected to a time skin pass rolling, rolling reduction 12.5% obtains
To thickness be 3.5mm, template is good and solidified structure has the strip deformed to a certain degree, be then crimped；
（4）Homogenization Treatments：The strip of above-mentioned skin pass rolling is subjected to high-temperature homogenization processing, is then quenched to room temperature.
Wherein, the temperature of Homogenization Treatments is 1220 DEG C, time 30min；
（5）Pickling：By the strip after Homogenization Treatments in specific pickle soak acid-cleaning handle, then use clear water and
Alcohol washes dry up, the base material as cold-reduced sheet.Wherein, the volume proportion of pickle is HCl:HF:HNO3:H2O =2:3:15:
100；
（6）Prepare cold-reduced sheet：Strip after pickling is subjected to cold-rolling deformation, single pass rolling reduction is 10% or so, total deformation
Amount is 85.7%, and the super austenitic stainless steel cold-reduced sheet that thickness is 0.5mm is finally prepared；
（7）The cold-reduced sheet of above-mentioned preparation is made annealing treatment, its mechanical property and corrosion resistance are then tested.Its
In, annealing treating process is 1000 DEG C × 20min.
After testing, the tensile strength for the stainless steel cold-rolled plate that prepared by the present invention is 788MPa, and yield strength 385MPa prolongs
It is 48.5% to stretch rate, and spot corrosion point is 1.05 V.
In addition, the strip cold-reduced sheet of the stack pile prepared in comparative example is subjected to annealing same as Example 8, and
Carry out the measurement of mechanical property and corrosion resistance, the results showed that, the tensile strength of traditional cold-reduced sheet is 728MPa, yield strength
For 360MPa, elongation percentage 45%, spot corrosion point is 1.0 V, and the performance of embodiment 8 is superior to the performance of comparative example.
Claims (9)
1. a kind of preparation method of the cold-reduced sheet of super austenitic stainless steel containing Sn, which is characterized in that comprise the following steps that：
（1）Melting：The super austenitic stainless steel that Sn mass contents are 0.05 ~ 0.5% is weighed by composition proportion, by what is weighed up
Raw material 120 ~ 180min of heating, drying under the conditions of 50 ~ 100 DEG C, raw material is classified, is put into vacuum induction melting furnace step by step,
It is smelted under the high vacuum environment that vacuum degree is 4 ~ 5 Pa, obtains molten steel；
（2）Cast：By pouring temperature control between 1500 ~ 1600 DEG C, under the protection of high-purity nitrogen, steel that will smelt
Water pours into through tundish and carries out casting in the molten bath in double roll strip casting mill；With the rotation of casting roll, Cast Strip gradually forms, system
The standby thickness that obtains is 2.5-4 mm, and width is the near-net-shape super austenitic stainless steel strip of 110-254mm, wherein casting speed
Degree is 35 ~ 55m/min, 45 ~ 65kN of casting-rolling force；
（3）Skin pass rolling：The above-mentioned near-net-shape super austenitic stainless steel strip being prepared is sent to two roller planishing mills,
The temperature of strip is between 1050 ~ 1150 DEG C at this time, and in the temperature range, strip is carried out a time skin pass rolling, rolling
Deflection is 12.5% ~ 20%；The strip that thickness is 2-3.5mm is obtained, is then crimped；
（4）Homogenization Treatments：By the above-mentioned strip by skin pass rolling under the protection of high-purity Ar or in vacuum environment into
The processing of row high-temperature homogenization, temperature are 1150-1250 DEG C, then 30 ~ 120min of processing time is quenched to room temperature；
（5）Pickling：By the strip after Homogenization Treatments, soak acid-cleaning is handled in pickle, and the volume proportion of the pickle is
HCl:HF:HNO3:H2O =2:3:15:100；Then clear water and alcohol washes is used to dry up, the base material as cold-reduced sheet；
（6）Prepare cold-reduced sheet：Strip after pickling is carried out cold-rolling deformation to be prepared super through 40 ~ 85.7% total deformation
The cold rolling panel products of grade austenitic stainless steel strip；
（7）It is quenched to room temperature after the cold rolling panel products of preparation are made annealing treatment.
2. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 1, which is characterized in that
Step（1）Described in the ingredient percent of super austenitic stainless steel be：C≤0.03%, N 0.18 ~ 0.25%,
Si≤1.0%, Cu≤1.0%, Mn≤2.0%, Mo 5 ~ 7%, Cr 20 ~ 22%, Ni 23.5 ~ 25.5%, surplus are
Fe and inevitable impurity, wherein P≤0.04%, S≤0.03%, O≤0.005%.
3. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 2, which is characterized in that
Step（1）Middle N is added in the form of nitrided ferro-chromium, and Sn, Mn and nitrided ferro-chromium sequentially add after other melting sources are complete.
4. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 1 or 2 or 3, special
Sign is step（6）Described in cold-rolling deformation single pass heavy deformation be 5.7% ~ 20% between.
5. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 1 or 2 or 3, special
Sign is step（6）Described in cold rolling panel products thickness be 0.5 ~ 1.2mm.
6. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 4, it is characterised in that
Step（6）Described in cold rolling panel products thickness be 0.5 ~ 1.2mm.
7. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claims 1 or 2 or 3 or 6,
It is characterized in that step（7）Described in cold-reduced sheet annealing temperature be 1000 ~ 1100 DEG C, processing time be 5 ~ 20min.
8. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 4, it is characterised in that
Step（7）Described in cold-reduced sheet annealing temperature be 1000 ~ 1100 DEG C, processing time be 5 ~ 20min.
9. a kind of preparation method of cold-reduced sheet of super austenitic stainless steel containing Sn according to claim 5, it is characterised in that
Step（7）Described in cold-reduced sheet annealing temperature be 1000 ~ 1100 DEG C, processing time be 5 ~ 20min.
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| CN101314836A (en) * | 2007-05-31 | 2008-12-03 | 日新制钢株式会社 | Austenite stainless steel plate for pressboard |
| CN103205655A (en) * | 2013-03-21 | 2013-07-17 | 宝钢不锈钢有限公司 | Sn-containing austenitic stainless steel and manufacturing method thereof |
| CN105543711A (en) * | 2015-12-22 | 2016-05-04 | 东北大学 | Cast-rolling method for restraining Cr element and Mo element of super-austenitic stainless steel from center segregation |
| CN106319391A (en) * | 2015-06-24 | 2017-01-11 | 宝钢不锈钢有限公司 | Acid rain corrosion-resistant austenitic stainless steel and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314836A (en) * | 2007-05-31 | 2008-12-03 | 日新制钢株式会社 | Austenite stainless steel plate for pressboard |
| CN103205655A (en) * | 2013-03-21 | 2013-07-17 | 宝钢不锈钢有限公司 | Sn-containing austenitic stainless steel and manufacturing method thereof |
| CN106319391A (en) * | 2015-06-24 | 2017-01-11 | 宝钢不锈钢有限公司 | Acid rain corrosion-resistant austenitic stainless steel and manufacturing method thereof |
| CN105543711A (en) * | 2015-12-22 | 2016-05-04 | 东北大学 | Cast-rolling method for restraining Cr element and Mo element of super-austenitic stainless steel from center segregation |
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