CN102936702A - Nickel-saving stainless steel panel and manufacturing method thereof - Google Patents
Nickel-saving stainless steel panel and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to the field of metal smelting and processing, particularly a nickel-saving stainless steel panel and a manufacturing method thereof. The invention aims to lower the contents of nickel and chrome in the traditional stainless steel and enhance the yield. The technical scheme is as follows: the nickel-saving stainless steel panel comprises the following chemical components in percentage by weight: less than or equal to 0.10% of C, greater than 0.35% and less than 1.1% of Si, greater than or equal to 8.0% and less than or equal to 9.5% of Mn, greater than or equal to 15.50% and less than or equal to 17.00% of Cr, greater than or equal to 1.0% and less than 2.00% of Ni, greater than 0.15% and less than or equal to 0.25% of N, greater than 1.00% and less than or equal to 1.50% of Cu, less than 0.060% of P, greater than or equal to 20*10<-4>% and less than or equal to 40*10<-4>% of B, greater than or equal to 20*10<-4>% and less than or equal to 100*10<-4>% of Ca, less than 0.010% of S, and the balance of Fe and inevitable impurities. The invention greatly lowers the production cost, effectively avoids peeling, blisters and other surface quality defects, and further widens the application range of the nickel-saving austenitic stainless steel.
Description
Technical field
The present invention relates to the smelting and processing of metals field, be specifically related to a kind of nickel-saving type stainless steel faceplate and manufacture method thereof.
Background technology
Nickel is a kind of scarce resource, and particularly in China, the amount of verifying of nickel resources only accounts for 5.9% of the whole world, and along with the in recent years develop rapidly of China's stainless steel industry, the demand of nickel is day by day surge also, it is estimated that the metallic nickel demand of China in 2015 will reach 3,000,000 tons.Along with the restrictive policy of nickel minerals leading exporter is put into effect, increasing stainless steel producer more pays close attention to the stainless development of nickel-saving type.
At present, the nickel-saving type stainless steel of producing at home mainly comprises: 200 set section nickel and stainless steels and 400 are ferritic stainless steel.Wherein, producing at home 200 is that the stainless main enterprises of nickel-saving type has: many (Guangzhou) company limiteds of connection, green hill Jin Hui, tai shan, Baosteel moral are contained nickel industry etc., its related products has nickel content all to be controlled at J4 series below 1.3, or nickel content is controlled at the D series stainless steel that 3.5～6.0 similar Japanese firm produces; Chromium content upper control limit also mostly is 16.00%, and all there are certain problem in its processibility and solidity to corrosion.
CN102230136A discloses a kind of chemical composition design and manufacture method thereof of low-nickel austenitic stainless steel, adopt 14.00%≤Cr≤16.00%, 0.1%≤Ni＜0.40%, wherein the content of chromium and nickel is all too low, to stainless processibility and solidity to corrosion Shortcomings all.
CN1584098A discloses the Composition Design of introducing low-nickel austenitic stainless steel, has adopted Ni≤1.2%, improves manganese content Mn:8.0～10.0%, but cold-forming property and stainless steel faceplate lumber recovery Shortcomings.
Summary of the invention
The technical problem to be solved in the present invention be overcome that traditional nickel-saving type stainless steel solidity to corrosion is poor, the problem of cold-forming property and lumber recovery deficiency.
The technical scheme of technical solution problem of the present invention provides a kind of nickel-saving type stainless steel faceplate.This nickel-saving type stainless steel faceplate, its chemical ingredients is by mass percentage: C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 1.0%≤Ni＜2.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, P＜0.060%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, S＜0.010%, surplus are Fe and inevitable impurity.
As preferred version of the present invention, this nickel-saving type stainless steel faceplate, its chemical ingredients is by mass percentage: 0.07%≤C≤0.10%, 0.35%＜Si＜0.70%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 0.15%＜N≤0.20%, 1.00%＜Cu≤1.50%, 1.5%≤Ni＜2.00%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤70 * 10
-4%, P＜0.060%, S＜0.010%, surplus are Fe and inevitable impurity.
As the further preferred scheme of the present invention, this nickel-saving type stainless steel faceplate, its chemical ingredients is by mass percentage: 1.7%≤Ni＜1.8%, C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, P＜0.060%, S＜0.010%, surplus are Fe and inevitable impurity.
As the present invention's preferred scheme further, this nickel-saving type stainless steel faceplate, its chemical ingredients is by mass percentage: 1.7%≤Ni＜1.8%, 0.07%≤C≤0.10%, 0.35%＜Si＜0.70%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%%, 0.15%＜N≤0.20%, 1.00%＜Cu≤1.50%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤70 * 10
-4%, P＜0.060%, S＜0.010%, surplus are Fe and inevitable impurity.
The present invention also provides the manufacture method of above-mentioned nickel-saving type stainless steel faceplate, may further comprise the steps:
A, to adopt nickel-contained pig iron be base-material and add high carbon ferro-chrome in the ratio of 200 ~ 300kg/t steel, at smelting mother liquor of stainless steel from electric furnace, and by the GOR converter smelting;
B, the refining of LF stove obtain molten steel, and its composition is by mass percentage: C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 1.0%≤Ni＜2.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, P＜0.060%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, S＜0.010%, surplus are Fe and inevitable impurity;
C, continuous casting;
D, continuously cast bloom are first through heating, and hot rolling obtains the hot-rolled black-skin volume again, and casting skin is rolled up through overheated pickling, cold rolling, the cold annealing and pickling and smooth of moving back.
Wherein, GOR converter steelmaking process described in the step a of above-mentioned nickel-saving type surface stainless steel board fabrication method adopts the manganese alloy baking regime: in the GOR smelting process, first the manganese alloy that adds is toasted, the manganese alloy storing temperature is 150～300 ℃, and storing time is controlled at 120～360min; The quality of described adding manganese alloy is 9 ~ 11kg steel.
Wherein, the mode of feeding silicon-calcium wire is adopted in the LF stove refining described in the aforesaid method step b, and adopts the ferro-boron microalloying, makes the B content in the molten steel be controlled at 20～40ppm, and Ca content is controlled at 40～70ppm.The described silicon-calcium wire of feeding refers to add
Silico-calcium cored-wire, actual add-on are 0.5～0.9kg/t steel; Described ferro-boron microalloying refers to add ferro-boron, and actual add-on is 0.1～0.2kg/t steel.
Wherein, the continuous casting described in the aforesaid method step c adopts pouring basket liquid level to guarantee at 800～1000mm.
Wherein, the temperature controlling range of hot rolling described in the aforesaid method steps d is 1150～1250 ℃.
Wherein, be 150～250min the heat-up time of hot rolling described in the aforesaid method steps d.Preferably, be 150～200min the heat-up time of hot rolling.
Nickel-saving type stainless steel provided by the invention replaces on the basis of noble metal nickel with manganese, nitrogen in tradition, by rational design of alloy, guarantee single austenite structure, had good hot-work and cold-forming property to guarantee material, avoided producing the mass defects such as the limit is split, decortication.Alloying by B has improved Drawing abillity.Process to make inclusion modification by Ca, adopt the alloy baking system, soft blow and the calm time technological measure such as combine has improved the purity of molten steel, has avoided the band steel surface imperfection such as peeling, sand holes to occur in the subsequent handling such as cold rolling, has improved lumber recovery.By improving Mn content, increased the solubleness of N, and N is very favorable for the pitting resistance that improves material, so product of the present invention has good corrosion resisting property.The present invention can reduce production costs greatly, has effectively avoided the surface quality defects such as peeling, sand holes, can well use building decoration, and the Application Areas of nickel-saving type austenitic stainless steel has further been widened in the fields such as goods panel.
Description of drawings
Fig. 1 nickel-saving type stainless steel faceplate production technological process.
Embodiment
Nickel-saving type stainless steel faceplate provided by the invention adopts following chemical composition design batching: C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 1.0%≤Ni＜2.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, P＜0.060%, 20 * 10 by mass percentage
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, S＜0.010%, surplus are Fe and inevitable impurity.
The present invention also provides the manufacture method of above-mentioned nickel-saving type stainless steel faceplate, may further comprise the steps:
A, to adopt nickel-contained pig iron be base-material and add high carbon ferro-chrome in the ratio of 200 ~ 300kg/t steel, at smelting mother liquor of stainless steel from electric furnace, and by the GOR converter smelting;
B, the refining of LF stove obtain molten steel, and its composition is by mass percentage: C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 1.0%≤Ni＜2.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, P＜0.060%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, S＜0.010%, surplus are Fe and inevitable impurity;
C, continuous casting;
D, continuously cast bloom are first through heating, and hot rolling obtains the hot-rolled black-skin volume again, and casting skin is rolled up through overheated pickling, cold rolling, the cold annealing and pickling and smooth of moving back;
Wherein, the manganese alloy baking regime that GOR converter steelmaking process described in the step a of above-mentioned nickel-saving type surface stainless steel board fabrication method adopts is: in the GOR smelting process, first the manganese alloy that adds is toasted, the manganese alloy storing temperature is 150～300 ℃, and storing time is controlled at 120～360min; The quality of described adding manganese alloy is 9 ~ 11kg steel.
Wherein, the temperature range of the electrosmelting described in the aforesaid method step a is 1600～1660 ℃, guarantees at 80～130min tap to tap time.
Wherein, the LF stove refining described in the aforesaid method step b adopts the calm system of soft blow process system and molten steel to combine, and improves the molten steel purity; The soft blow mode is in the soft blow of ladle bottom blowing argon gas, soft blow time requirement 10～15min; The calm time of molten steel guarantees at 10～30min.Described argon gas soft blow, the uninterrupted of argon gas is take the slag wriggling as standard.
Wherein, the mode of feeding silicon-calcium wire is adopted in the LF stove refining described in the aforesaid method step b, and adopts the ferro-boron microalloying, makes the B content in the molten steel be controlled at 20～40ppm, and Ca content is controlled at 40～70ppm.The described silicon-calcium wire of feeding refers to add
Silico-calcium cored-wire, actual add-on are 0.5～0.9kgt steel; Described ferro-boron microalloying refers to ferro-boron, and actual add-on is 0.10～0.20kg/t steel.
Wherein, the continuous casting described in the aforesaid method step c adopts pouring basket liquid level to guarantee at 800～1000mm.
Wherein, the temperature controlling range of hot rolling described in the aforesaid method steps d is 1150～1250 ℃.
Wherein, be 150～250min the heat-up time of hot rolling described in the aforesaid method steps d.Preferably, be 150～200min the heat-up time of hot rolling.
The method of making above-mentioned nickel-saving type stainless steel faceplate specifically may further comprise the steps:
A, through electric furnace, GOR converter smelting stainless molten steel: to adopt nickel-contained pig iron be base-material and add high carbon ferro-chrome by 200 ~ 300kg/t steel, at smelting mother liquor of stainless steel from electric furnace, and by the GOR converter smelting; In the GOR smelting process, first the manganese alloy that adds is toasted, the manganese alloy storing temperature is 150～300 ℃, storing time is controlled at 120～360min, to control hydrogen in steel content less than 5ppm.Manganese alloy after will toasting again joins in the mother liquor of stainless steel, obtains the molten steel of alloying.The quality that adds manganese alloy is 9 ~ 11kg/t steel.
Nickel-saving type stainless steel manganese content is usually higher, adds a large amount of manganese alloys in the smelting process later stage, and manganese alloy is usually with the water of certain content, join with this understanding in the molten steel, water decomposition forms hydrogen and has little time to overflow, and remains in the steel, affect following process, mass defect occurs.
B, molten steel are sent to LF again and process, the refining of LF stove: adopt the calm system of soft blow process system and molten steel to combine, improve the molten steel purity; The soft blow mode adopts ladle bottom blowing argon gas soft blow requirement, and uninterrupted is take the slag wriggling as standard, soft blow time requirement 10～15min; The calm time of molten steel guarantees at 10～30min.
In the refining of LF stove, after alloy has added, adopt the mode of feeding silicon-calcium wire, actual add-on is 0.5～0.9kg/t steel, to improve the character of inclusion; Adopt the ferro-boron microalloying to improve hot workability, actual add-on is 0.10～0.20kg/t steel; Make the boron content in the molten steel be controlled at 20～40ppm, calcium contents is controlled at 40～70ppm.Tapping temperature requires at 1515～1535 ℃.
C, continuous casting: the continuous casting tundish adopts pouring basket liquid level to guarantee at 800～1000mm, guarantees that casting process occurs without the phenomenon of the secondary pollution molten steel such as slag.
D, continuously cast bloom obtain the hot-rolled black-skin volume through hot rolling, casting skin is rolled up through overheated pickling, cold rolling, the cold annealing and pickling and smooth of moving back: be controlled at 150～250min the heat-up time of hot rolling, be 150～200min preferred heat-up time, and temperature controlling range is 1150～1250 ℃.Avoid causing the hot-rolled black-skin crimping to split because forming the ferritic formation of high temperature, and reduce the lumber recovery of nickel-saving type stainless steel faceplate.
Below in conjunction with embodiment the specific embodiment of the present invention is further described.
Embodiment 1
Take nickel-contained pig iron as base-material, its main chemical compositions is by mass percentage: C 4.2%, S 0.11%, P 0.055%, Si0.88%, Ni 1.79%, surplus is Fe.Add high carbon ferro-chrome by steel 252kg per ton, it is joined smelting stainless steel mother liquor in the electric furnace, electrosmelting time 102min, 1643 ℃ of electric furnace steel tapping temperature; Again the mother liquor of stainless steel that obtains is joined in the GOR converter smelting stove, just refine 1583 ℃ of temperature.In the GOR smelting process, first the manganese alloy (92kg/t steel) that adds is toasted, the actual temperature of baking is 172 ℃, storing time is 162min, manganese alloy after will toasting again joins in the mother liquor of stainless steel, get the molten steel of alloying, its chemical ingredients is by mass percentage: C 0.075%, S 0.005%, P 0.045%, Si 0.38%, Ni 1.71%, Cr 16.31%, Cu 1.21%, N 0.16%, surplus is Fe.
Molten steel is sent to LF again and processes, and molten steel is warming up to 1535 ℃ by the electrically heated of LF stove.Carry out microalloying through ferro-boron and add ferro-boron 0.19kg/t steel, silicon-calcium wire is processed and is added
Silico-calcium cored-wire 0.675kg/t steel makes the boron content in the molten steel be controlled at 25ppm, and calcium contents is controlled at 35ppm.Departures molten steel chemical ingredients is by mass percentage: C 0.075%, Si 0.45%, Mn 9.11%, Cr 16.320%, Ni 1.71%, N 0.16%, Cu 1.21%, P 0.048%, B 25 * 10
-4%, Ca 35 * 10
-4%, S 0.005%, surplus is Fe.
Then ladle is sent to continuous casting.Continuous casting tundish liquid level working control 890mm, the molten steel after the LF refining obtain the continuous casting steel billet of 180 * 1250 * 12000mm through the continuous caster continuous casting.Its chemical ingredients is by mass percentage: C 0.075%, Si 0.45%, Mn 9.11%, Cr 16.320%, Ni 1.71%, N 0.16%, Cu 1.21%, P 0.048%, B 25 * 10
-4%, Ca 35 * 10
-4%, S 0.005%, surplus is Fe.
Then continuous casting steel billet is through hot rolling, and obtaining thickness is that the 2.85mm width is the stainless steel casting skin volume of 1250mm.Process furnace actual heat-up time is 175min, and Heating temperature is 1190 ℃, obtains the band steel on 2B surface behind thermal annealing pickling, cold rolling, cold annealing and pickling with steel.The actual test of [H] content in the analytic band steel is 3ppm after testing.
Utilize metallographic method that the inclusion grade in the steel is evaluated, evaluating basis is GB/T10561-2005, and the result is as shown in table 1.
Table 1 metallographic method detects band steel clamp foreign material result
Measure pitting potential Ep (mV) according to GB/T 17899-1999, the result is as shown in the table, and do contrast with the stainless steel pitting potential that patent CN102230136A invents, can draw by corrosion resisting property of the present invention and be better than the stainless steel that patent CN102230136A invents.
Table 2 embodiment pitting potential Ep (mV) measures
Embodiment 2
Take nickel-contained pig iron as base-material, the tool main chemical compositions is by mass percentage: C 4.13%, S 0.14%, P 0.052%, Si 0.92%, Ni 1.82%, surplus is Fe.Add high carbon ferro-chrome by steel 255kg per ton, it is joined smelting stainless steel mother liquor in the electric furnace, electrosmelting time 98min, 1639 ℃ of electric furnace steel tapping temperature; Again the mother liquor of stainless steel that obtains is joined in the GOR converter smelting stove, just refine 1586 ℃ of temperature.In the GOR smelting process, first the manganese alloy (90kg/t steel) that adds is toasted, the actual temperature of baking is 189 ℃, storing time is 204min, manganese alloy after will toasting again joins in the mother liquor of stainless steel, get the molten steel of alloying, its chemical ingredients is by mass percentage: C 0.75%, S 0.005%, P 0.045%, Si 0.38%, Ni 1.71%, surplus is Fe.
Molten steel is sent to LF again and processes, and molten steel is warming up to 1532 ℃ by the electrically heated of LF stove.Add ferro-boron 0.16kg/t steel, silicon-calcium wire is processed and is added
Silico-calcium cored-wire 0.676kg/t steel makes the boron content in the molten steel be controlled at 22ppm, and calcium contents is controlled at 38ppm.Departures molten steel chemical ingredients is by mass percentage: C 0.073%, Si 0.46%, Mn 9.12%, Cr 16.25%, Ni 1.61%, N 0.18%, Cu 1.24%, P 0.052%, B 22 * 10
-4%, Ca 38 * 10
-4%, S 0.005%, surplus is Fe.
Then ladle is sent to continuous casting.Continuous casting tundish liquid level working control 896mm, the molten steel after the LF refining obtain the continuous casting steel billet of 180 * 1250 * 12000mm through the continuous caster continuous casting.Its chemical ingredients is by mass percentage: C 0.073%, Si 0.46%, Mn 9.12%, Cr 16.25%, Ni 1.6l%, N 0.18%, Cu 1.24%, P 0.052%, B 22 * 10
-4%, Ca 38 * lO
-4%, S 0.005%, surplus is Fe.
Then continuous casting steel billet is through hot rolling, and obtaining thickness is that the 2.5mm width is the stainless steel casting skin volume of 1250mm.The actual time inside furnace of process furnace is 180min, and Heating temperature is 1170 ℃, obtains the band steel on 2B surface behind thermal annealing pickling, cold rolling, cold annealing and pickling with steel.
Utilize metallographic method that the inclusion grade in the steel is evaluated, evaluating basis is GB/T10561-2005, and the result is as shown in table 3.
Table 3 metallographic method detects band steel clamp foreign material result
Can be found out that by table 1 and 2 band steel inclusion quantity provided by the invention is few, size is little, is conducive to improve the lumber recovery of nickel-saving type stainless steel faceplate.
Measure pitting potential Ep (mV) according to GB/T 17899-1999, the result is as shown in the table, and do contrast with the stainless steel pitting potential that patent CN102230136A invents, can draw by corrosion resisting property of the present invention and be better than the stainless steel that patent CN102230136A invents.
Table 4 embodiment pitting potential Ep (mV) measures
Nickel-saving type stainless steel provided by the invention replaces on the basis of noble metal nickel with manganese, nitrogen in tradition, by rational design of alloy, guarantee single austenite structure, had good hot-work and cold-forming property to guarantee material, avoided producing the mass defects such as the limit is split, decortication.Alloying by B has improved Drawing abillity.Process to make inclusion modification by Ca, adopt the alloy baking system, soft blow and the calm time technological measure such as combine has improved the purity of molten steel, has avoided the band steel surface imperfection such as peeling, sand holes to occur in the subsequent handling such as cold rolling, has improved lumber recovery.By improving Mn content, increased the solubleness of N, and N is very favorable for the pitting resistance that improves material, so product of the present invention has good corrosion resisting property.
Claims (6)
1. nickel-saving type stainless steel faceplate, its chemical ingredients is by mass percentage: C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 1.0%≤Ni＜2.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, P＜0.060%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, S＜0.010%, surplus are Fe and inevitable impurity.
2. nickel-saving type stainless steel faceplate according to claim 1, it is characterized in that: its chemical ingredients is by mass percentage: 0.07%≤C≤0.10%, 0.35%＜Si＜0.70%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 0.15%＜N≤0.20%, 1.00%＜Cu≤1.50%, 1.5%≤Ni＜2.00%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤70 * 10
-4%, P＜0.060%, S＜0.010%, surplus are Fe and inevitable impurity.
3. nickel-saving type stainless steel faceplate according to claim 1 and 2 is characterized in that: wherein, and 1.5%≤Ni＜1.8%.
4. the preparation method of a nickel-saving type stainless steel faceplate, it is characterized in that: this preparation method may further comprise the steps:
A, to adopt nickel-contained pig iron be base-material and add high carbon ferro-chrome by 200 ~ 300kg/t steel, at smelting mother liquor of stainless steel from electric furnace, and by the GOR converter smelting;
B, the refining of LF stove obtain molten steel, and its composition is by mass percentage: C≤0.10%, 0.35%＜Si＜1.1%, 8.0≤Mn≤9.5%, 15.50%≤Cr≤17.00%, 1.0%≤Ni＜2.00%, 0.15%＜N≤0.25%, 1.00%＜Cu≤1.50%, P＜0.060%, 20 * 10
-4%≤B≤40 * 10
-4%, 20 * 10
-4%≤Ca≤100 * 10
-4%, S＜0.010%, surplus are Fe and inevitable impurity;
C, continuous casting;
D, continuously cast bloom are first through heating, and hot rolling obtains the hot-rolled black-skin volume again, and the casting skin volume is through solid solution pickling, cold rolling, cold annealing and pickling and smooth.
5. the manufacture method of nickel-saving type stainless steel faceplate according to claim 4, it is characterized in that: the GOR converter steelmaking process described in the step a, adopt the manganese alloy baking regime: in the GOR smelting process, first the manganese alloy that adds is toasted, the manganese alloy storing temperature is 150～300 ℃, and storing time is controlled at 120～360min; The quality of described adding manganese alloy is 9 ~ 11kg/t steel.
6. the manufacture method of nickel-saving type stainless steel faceplate according to claim 4, it is characterized in that: the LF stove refining described in the step b, adopt the mode of feeding silicon-calcium wire, and adopt the ferro-boron microalloying, make the B content in the molten steel be controlled at 20～40ppm, Ca content is controlled at 40～70ppm.
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| CN103525970A (en) * | 2013-10-17 | 2014-01-22 | 四川金广实业（集团）股份有限公司 | Production process for suppressing peeling of hot rolled steel strips of 304 austenitic stainless steel |
| CN103571995A (en) * | 2013-11-07 | 2014-02-12 | 大连得霖重工有限公司 | External alloying process of precision stainless steel furnace |
| CN103801582A (en) * | 2014-01-28 | 2014-05-21 | 张家港浦项不锈钢有限公司 | Nickel-saving type stainless steel processing method |
| CN104611643A (en) * | 2015-01-21 | 2015-05-13 | 内蒙古科技大学 | 316 austenitic stainless steel with nitrogen increased and nickel decreased and preparation method thereof |
| CN107760976A (en) * | 2017-10-30 | 2018-03-06 | 山西太钢不锈钢股份有限公司 | A kind of method of converter desiliconization liquation smelting austenitic stainless steel |
| CN110819880A (en) * | 2019-11-27 | 2020-02-21 | 宝钢德盛不锈钢有限公司 | Pretreatment process and application of chromium-containing low-nickel molten iron for production of 200-series stainless steel |
| CN112226686A (en) * | 2020-09-29 | 2021-01-15 | 鞍钢联众(广州)不锈钢有限公司 | Stainless steel plate for ore sieve sheet and manufacturing method thereof |
| CN114686784A (en) * | 2022-04-02 | 2022-07-01 | 四川罡宸不锈钢有限责任公司 | Nickel-saving austenitic stainless steel material and preparation method thereof |
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