CN106987777A - A kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method - Google Patents

A kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method Download PDF

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CN106987777A
CN106987777A CN201710161686.6A CN201710161686A CN106987777A CN 106987777 A CN106987777 A CN 106987777A CN 201710161686 A CN201710161686 A CN 201710161686A CN 106987777 A CN106987777 A CN 106987777A
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steel
vanadium
extra
micro
deep drawing
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张琳
赵彦松
刘伟
孔超
王二华
吴丽
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HBIS Co Ltd Chengde Branch
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HBIS Co Ltd Chengde Branch
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Abstract

The invention discloses a kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method, the weight percentage of its chemical composition is：C：0.0010~0.0040%, Si≤0.03%, Mn 0.10~0.20%, P≤0.013%, S≤0.010%, Als 0.020~0.050%, Ti 0.055~0.070%, N≤0.0040%, Cu≤0.05%, Cr≤0.05%, Ni≤0.05%, Mo≤0.020%, Nb≤0.005%, V≤0.015%, B≤0.0005%, surplus is Fe and inevitable impurity；Wherein Cu+Cr+Ni≤0.07%.This IF steel is by Ti, V complex intensifying, while substituting the niobium of costliness by adding a small amount of vanadium（Or titanium and manganese content is greatly lowered）, cost can be effectively reduced；With it is functional, cost is low the characteristics of.This method has production cost low, and technique is simple, the features such as product excellent combination property.

Description

A kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method
Technical field
The invention belongs to metallurgical technology field, especially a kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method.
Background technology
IF steel is Interstitial Free Steel abbreviation, therefore IF steel is also known as " gapless atomic steel ", due to steel In C, N atom of solid solution very close to each other exist, the steel has excellent deep drawability and Non-ageing.Spy of the IF steel on composition Point is to add the strong carbonitride-forming elements such as a certain amount of titanium, niobium to realize Ultra-low carbon, and substantially without C, N interstitial atom, steel is pure Only.It is widely used in the parts of household appliance structure part, automobile industry to being stamped with high requirement etc..IF steel is in process of production It is required that steel making working procedure accomplishes the Ultra-low carbon processing of molten steel, sublimate processing, residual element content is reduced, Ti microalloy elements are improved Absorptivity while ensure that steel obtains excellent punch forming performance.Current IF steel is mostly strong using Nb, Ti complex intensifying, Nb Change or the reinforcing of high titanium, cost is higher.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of micro- vanadium extra-deep drawing IF steel of inexpensive titaniferous；The present invention is also carried A kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method are supplied.
In order to solve the above technical problems, the weight percentage of chemical composition of the present invention is：C 0.0010~0.0040%, Si≤0.03%, Mn 0.10~0.20%, P≤0.013%, S≤0.010%, Als 0.020~0.050%, Ti 0.055~ 0.070%, N≤0.0040%, Cu≤0.05%, Cr≤0.05%, Ni≤0.05%, Mo≤0.020%, Nb≤0.005%, V≤ 0.015%, B≤0.0005%, surplus is Fe and inevitable impurity；Wherein Cu+Cr+Ni≤0.07%.
Yield strength≤300MPa of IF steel of the present invention, tensile strength≤360MPa, elongation A >=33%, A, B, C, D class non-metallic inclusions are slightly≤1.0 grades, thin≤1.5 grades of system.
The function of each chemical composition is as described below：
C：Have a strong impact on the deep drawability and aging performance of steel, it is necessary to be eliminated as much as, for C remaining in steel, using add Ti, V mode is fixed.
N：It is similar with C to the illeffects of steel, but the N controls Al that deoxidation is remained in below 40ppm can produce stable with N AlN, N can be completely fixed, on a small quantity also can be combined with Ti, V generation carbonitride.
Si：Deep drawability to steel is harmful to；On the other hand the zinc-plated performance of steel is influenceed.The Si that should be reduced as far as possible in steel contains Amount.
S：To a certain extent（About 0.005~0.006%）Be conducive to C precipitation, the deep drawability to raising steel is favourable； But S is too high then harmful to steel.
Mn：Generation MnS can be combined with S reduces S adverse effect, while improving the mechanical property of steel.
P：Ductility, cold plasticity to IF steel have a significant impact, it is desirable to which phosphorus content is more low better in IF steel.Some high-strength The intensity of steel is improved in IF steel as intensified element.
Ti：Strong carbonitride-forming elements, and easily combined with O, S, N, therefore to improve the absorptivity of titanium, it is necessary to it is strict O, S, N content are controlled, effective titanium can improve the mechanical strength of steel.
V：Strong carbonitride-forming elements, the mechanical strength that its carbonitride improves steel is notable.
Al：Strong deoxidant element and the brittle transition temperature for reducing steel, Al and N formation Dispersed precipitate in steel AlN grains Son, reduces timeliness.
Other elements：Have a strong impact on the punch forming performance of steel and use field, need to strictly control.
The inventive method includes converter smelting, RH and refined, continuous casting, heating, rolling, cooling and coiling process；The continuous casting The weight percentage of slab chemical composition is as described above obtained by process.
Heating process described in the inventive method：Heating of plate blank is to 1180~1240 DEG C.
Rolling process described in the inventive method：1020~1060 DEG C of roughing outlet temperature, the finishing temperature of finish rolling for 900~ 920℃。
Refrigerating work procedure described in the inventive method：Cooling velocity is 16~20 DEG C/s.
Coiling process described in the inventive method：Coiling temperature is 680~700 DEG C.
RH refining procedures described in the inventive method：Vanadium iron and ferrotianium are added after RH vacuum refining later stages abundant aluminium deoxidation, And vanadium iron is added prior to ferrotianium.
Continuous casting working procedure described in the inventive method：Pulling rate >=1.0min of continuous casting.
The mentality of designing of the present invention and its method：Carbon, nitrogen compound is promoted to separate out by Ti, V complex intensifying, reduction C, The presence of N gaps solid solution atom, improves the punch forming performance of steel.Simultaneously substituted by adding a small amount of vanadium costliness niobium or A small amount of vanadium is added titanium and manganese content, cost of implementation reduction is greatly lowered.
Current IF steel is divided into 3 kinds by the difference of addition element：The Ti-IF steel of single addition titanium, the Nb- of single addition niobium IF steel and the Nb+Ti-IF steel for adding titanium and niobium simultaneously.The present invention uses Ultra-low carbon composition design, it is ensured that C, the N remained in steel contains Amount is as low as possible；The micro V by adding, promotes to form carbonitride in steel, and reduces the addition of Ti alloys, reduces alloy Cost；Carbon, nitrogen in control steel, sulphur, oxygen content, while vanadium iron and ferrotianium add after RH vacuum refining later stages abundant aluminium deoxidation Enter, and vanadium iron is added prior to ferrotianium, can be improved Ti absorptivity and be ensured effective titanium content；By controlling residual elements to improve steel Water degree of purity reduces non-metallic inclusion.Using rapid cooling, high temperature coiling after low slab heating temperature, high temperature rolling, finish to gauge etc. Technique obtains the ferritic structure and larger precipitate of fine uniform, is conducive to the raising of r values and plasticity, so as to improve IF steel Punch forming performance and use field.
It is using the beneficial effect produced by above-mentioned technical proposal：The present invention is passed through simultaneously by Ti, V complex intensifying A small amount of vanadium is added to substitute the niobium of costliness（Or titanium and manganese content is greatly lowered）, cost can be effectively reduced；With performance Well, the characteristics of cost is low.
The present invention, by adding appropriate Ti and trace V, promotes to form carbon, nitrogen compound precipitation using in ultra-low-carbon steel, The presence of C, N gap solid solution atom is reduced, IFization is reached；By controlling the technique of each operation, Ti microalloy elements are being improved Ensure that steel obtains excellent punch forming performance while absorptivity, so as to obtain the good IF steel steel plates of properties.This Inventive method has production cost low, and technique is simple, the features such as product excellent combination property.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
The production method of this extra-deep drawing IF steel includes converter smelting, RH and refined, continuous casting, heating, rolling, cooling and fourth hand Sequence；Wherein, also LF refining can first be carried out before RH refinings；The technique of each technique is as described below：
（1）RH refining procedures：Vanadium iron and ferrotianium are added after RH vacuum refining later stages abundant aluminium deoxidation, and vanadium iron adds prior to ferrotianium Enter.
（2）The continuous casting working procedure：Continuous casting secondary cooling uses weak cold, and pulling rate >=1.0min of continuous casting, continuous casting whole process is used Protective casting.
（3）The heating process：It is heat-fed using straight dress into stove, is heat-fed temperature >=300 DEG C, heating of plate blank to 1180~1240 DEG C, the heat time is 100~180min in stove.
（4）The rolling process：Rough rolling process is reversible rolling mode, the passage of controlled rolling 5, roughing outlet temperature 1020~1060 DEG C；Finishing stands use 7 frame continuous-rolling controlled rollings, and finishing temperature is 900~920 DEG C.
（5）The cooling and coiling process：Cooling velocity is 16~20 DEG C/s, and coiling temperature is 680~700 DEG C.
Embodiment 1：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.004%, Si 0.025%, Mn 0.10%, P 0.010%, S 0.009%, Als 0.033%, Ti 0.055%, N 0.0026%, Cu 0.01%, Cr 0.02%, Ni 0.012%, Mo0.004%, Nb0.002%, V 0.015%, B 0.0001%, surplus is Fe and inevitable impurity, Cu+Cr+Ni=0.042%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.0m/ min；Slab is heat-fed 300 DEG C of temperature, is heated to 1231 DEG C, and the heat time is 150min in stove；The outlet temperature of roughing is 1042 DEG C, the outlet temperature of finish rolling is 908 DEG C；Cooled down by 16 DEG C/s, coiling temperature is 689 DEG C.The surrender of gained IF steel coil of strips is strong Spend for 225MPa, tensile strength is 290MPa, and elongation 50%, non-metallic inclusion is 1.0 grades except the thin field trash of D classes, and other are non- Metallic inclusion content is 0 grade.
Embodiment 2：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0032%, Si 0.01%, Mn 0.13%, P 0.008%, S 0.005%, Als 0.048%, Ti 0.060%, N 0.0019%, Cu 0.01%, Cr 0.03%, Ni 0.014%, Mo 0.003%, Nb 0.002%, V 0.010%, B 0.0002%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.055%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.07m/ min；Slab is heat-fed 585 DEG C of temperature, is heated to 1233 DEG C, and the heat time is 140min in stove；Roughing outlet temperature is 1044 DEG C, Exit temperature at finishing is 908 DEG C；Cooled down by 17 DEG C/s, coiling temperature is 686 DEG C.The yield strength of gained IF steel coil of strips is 245MPa, tensile strength is 305MPa, and elongation 46%, non-metallic inclusion is 1.0 grades except the thin field trash of D classes, and other are nonmetallic Inclusion content is 0 grade.
Embodiment 3：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0025%, Si 0.005%, Mn 0.16%, P 0.006%, S 0.005%, Als 0.028%, Ti 0.065%, N 0.0030%, Cu 0.012%, Cr 0.02%, Ni 0.013%, Mo 0.005%, Nb 0.002%, V 0.005%, B 0.0001%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.045%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.1m/ min；Slab is heat-fed 736 DEG C of temperature, is heated to 1211 DEG C, and the heat time is 100min in stove；Roughing outlet temperature is 1022 DEG C, Exit temperature at finishing is 910 DEG C；Cooled down by 18 DEG C/s, coiling temperature is 690 DEG C.The yield strength of gained IF steel coil of strips is 270MPa, tensile strength is 335MPa, and elongation 40%, non-metallic inclusion is 1.0 grades except the thin field trash of D classes, and other are nonmetallic Inclusion content is 0 grade.
Embodiment 4：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0012%, Si 0.011%, Mn 0.20%, P 0.006%, S 0.003%, Als 0.034%, Ti 0.070%, N 0.0038%, Cu 0.013%, Cr 0.01%, Ni 0.012%, Mo 0.004%, Nb 0.002%, V 0.002%, B 0.0001%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.034%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.01m/ min；Slab is heat-fed 627 DEG C of temperature, is heated to 1240 DEG C, and the heat time is 180min in stove；Roughing outlet temperature is 1060 DEG C, Exit temperature at finishing is 903 DEG C；Cooled down by 20 DEG C/s, coiling temperature is 688 DEG C.The yield strength of gained IF steel coil of strips is 290MPa, tensile strength is 350MPa, and elongation 35%, non-metallic inclusion is 1.0 grades except the thin field trash of D classes, and other are nonmetallic Inclusion content is 0 grade.
Embodiment 5：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0010%, Si 0.018%, Mn 0.15%, P 0.013%, S 0.008%, Als 0.042%, Ti 0.070%, N 0.0029%, Cu 0.050%, Cr 0.01%, Ni 0.01%, Mo 0.020%, Nb 0.004%, V 0.007%, B 0.0003%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.07%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.2m/ min；Slab is heat-fed 689 DEG C of temperature, is heated to 1200 DEG C, and the heat time is 120min in stove；Roughing outlet temperature is 1053 DEG C, Exit temperature at finishing is 920 DEG C；Cooled down by 19 DEG C/s, coiling temperature is 695 DEG C.The yield strength of gained IF steel coil of strips is 300MPa, tensile strength is 350MPa, and elongation 33%, non-metallic inclusion is 1.5 grades except the thin field trash of A classes, and B classes are slightly mingled with Thing is 1.0 grades, and other non-metallic inclusion contents are 0 grade.
Embodiment 6：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0021%, Si 0.03%, Mn 0.18%, P 0.007%, S 0.010%, Als 0.023%, Ti 0.058%, N 0.0040%, Cu 0.026%, Cr 0.02%, Ni 0.016%, Mo 0.009%, Nb 0.005%, V 0.012%, B 0.0004%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.062%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.05m/ min；Slab is heat-fed 705 DEG C of temperature, is heated to 1240 DEG C, and the heat time is 170min in stove；Roughing outlet temperature is 1035 DEG C, Exit temperature at finishing is 911 DEG C；Cooled down by 18 DEG C/s, coiling temperature is 680 DEG C.The yield strength of gained IF steel coil of strips is 290MPa, tensile strength is 360MPa, and elongation 34%, non-metallic inclusion is 1.5 grades except the thin field trash of B classes, and D classes are slightly mingled with Thing is 1.0 grades, and other non-metallic inclusion contents are 0 grade.
Embodiment 7：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0017%, Si 0.022%, Mn 0.14%, P 0.009%, S 0.007%, Als 0.050%, Ti 0.062%, N 0.0034%, Cu 0.008%, Cr 0.01%, Ni 0.050%, Mo 0.016%, Nb 0.003%, V 0.008%, B 0.0005%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.068%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.15m/ min；Slab is heat-fed 600 DEG C of temperature, is heated to 1232 DEG C, and the heat time is 160min in stove；Roughing outlet temperature is 1038 DEG C, Exit temperature at finishing is 916 DEG C；Cooled down by 16 DEG C/s, coiling temperature is 684 DEG C.The yield strength of gained IF steel coil of strips is 250MPa, tensile strength is 310MPa, and elongation 45%, non-metallic inclusion is 1.5 grades except the thin field trash of D classes, and C classes are slightly mingled with Thing is 1.0 grades, and other non-metallic inclusion contents are 0 grade.
Embodiment 8：The production method of this extra-deep drawing IF steel uses following concrete technologies.
The mass percent of the IF composition of steel is：C 0.0036%, Si 0.014%, Mn 0.12%, P 0.010%, S 0.006%, Als 0.020%, Ti 0.067%, N 0.0022%, Cu 0.011%, Cr 0.05%, Ni 0.008%, Mo 0.012%, Nb 0.002%, V 0.015%, B 0.0003%, surplus is Fe and inevitable impurity；Cu+Cr+Ni=0.069%.
The technique is：Vanadium iron, ferrotianium successively are added after RH vacuum refining later stage aluminium deoxidations；Pulling speed of continuous casting is 1.1m/ min；Slab is heat-fed 743 DEG C of temperature, is heated to 1180 DEG C, and the heat time is 130min in stove；Roughing outlet temperature is 1020 DEG C, Exit temperature at finishing is 900 DEG C；Cooled down by 17 DEG C/s, coiling temperature is 700 DEG C.The yield strength of gained IF steel coil of strips is 245MPa, tensile strength is 310MPa, and elongation 52%, non-metallic inclusion is 1.5 grades except the thin field trash of C classes, and A classes are slightly mingled with Thing is 1.0 grades, and other non-metallic inclusion contents are 0 grade.

Claims (9)

1. a kind of micro- vanadium extra-deep drawing IF steel of titaniferous, it is characterised in that the weight percentage of its chemical composition is：C 0.0010~ 0.0040%, Si≤0.03%, Mn 0.10~0.20%, P≤0.013%, S≤0.010%, Als 0.020~0.050%, Ti 0.055~0.070%, N≤0.0040%, Cu≤0.05%, Cr≤0.05%, Ni≤0.05%, Mo≤0.020%, Nb≤0.005%, V≤0.015%, B≤0.0005%, surplus is Fe and inevitable impurity；Wherein Cu+Cr+Ni≤0.07%.
2. the micro- vanadium extra-deep drawing IF steel of a kind of titaniferous according to claim 1, it is characterised in that：The yield strength of the IF steel ≤ 300MPa, tensile strength≤360MPa, elongation A >=33%, A, B, C, D class non-metallic inclusion are slightly≤1.0 grades, thin system ≤ 1.5 grades.
3. a kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method, it is characterised in that：It includes converter smelting, RH refinings, even Casting, heating, rolling, cooling and coiling process；The weight percentage of slab chemical composition is obtained by the continuous casting working procedure：C： 0.0010~0.0040%, Si≤0.03%, Mn 0.10~0.20%, P≤0.013%, S≤0.010%, Als 0.020~ 0.050%, Ti 0.055~0.070%, N≤0.0040%, Cu≤0.05%, Cr≤0.05%, Ni≤0.05%, Mo≤0.020%, Nb≤0.005%, V≤0.015%, B≤0.0005%, surplus is Fe and inevitable impurity；Wherein Cu+Cr+Ni≤0.07%.
4. the micro- vanadium extra-deep drawing IF steel of a kind of titaniferous according to claim 3 and its production method, it is characterised in that described to add Thermal technology's sequence：Heating of plate blank is to 1180~1240 DEG C.
5. the micro- vanadium extra-deep drawing IF steel of a kind of titaniferous according to claim 3 and its production method, it is characterised in that described to roll Process processed：1020~1060 DEG C of roughing outlet temperature, the finishing temperature of finish rolling is 900~920 DEG C.
6. the micro- vanadium extra-deep drawing IF steel of a kind of titaniferous according to claim 3 and its production method, it is characterised in that described cold But process：Cooling velocity is 16~20 DEG C/s.
7. the micro- vanadium extra-deep drawing IF steel of a kind of titaniferous according to claim 3 and its production method, it is characterised in that the volume Take process：Coiling temperature is 680~700 DEG C.
8. the micro- vanadium extra-deep drawing IF steel of a kind of titaniferous according to claim 3 and its production method, it is characterised in that the RH Refining procedure：Vanadium iron and ferrotianium are added after RH vacuum refining later stages abundant aluminium deoxidation, and vanadium iron is added prior to ferrotianium.
9. a kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method according to claim 3-8 any one, its feature It is, the continuous casting working procedure：Pulling rate >=1.0min of continuous casting.
CN201710161686.6A 2017-03-17 2017-03-17 A kind of micro- vanadium extra-deep drawing IF steel of titaniferous and its production method Pending CN106987777A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110273107A (en) * 2019-06-14 2019-09-24 河钢股份有限公司承德分公司 A kind of high-strength IF steel plate and its production method
CN111254247A (en) * 2020-01-21 2020-06-09 江苏省沙钢钢铁研究院有限公司 Method for controlling titanium-containing IF steel continuous casting nozzle nodulation
CN112593142A (en) * 2020-10-26 2021-04-02 邯郸钢铁集团有限责任公司 Low-cost high-purity ultra-low carbon steel strip and production method thereof
CN112899576A (en) * 2021-01-15 2021-06-04 山东钢铁集团日照有限公司 Cold-rolled steel plate for precision household electric welding pipe and production method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1986863A (en) * 2006-12-29 2007-06-27 北京科技大学 Superlow carbon baking hardened steel plate added with Ti and V and its making process
CN101654765A (en) * 2009-07-11 2010-02-24 山西太钢不锈钢股份有限公司 Interstitial-free hot-rolled steel strip and manufacturing method thereof
WO2012073631A1 (en) * 2010-11-30 2012-06-07 Ｕｄトラックス株式会社 Method for improving fatigue strength of cast iron material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1986863A (en) * 2006-12-29 2007-06-27 北京科技大学 Superlow carbon baking hardened steel plate added with Ti and V and its making process
CN101654765A (en) * 2009-07-11 2010-02-24 山西太钢不锈钢股份有限公司 Interstitial-free hot-rolled steel strip and manufacturing method thereof
WO2012073631A1 (en) * 2010-11-30 2012-06-07 Ｕｄトラックス株式会社 Method for improving fatigue strength of cast iron material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110273107A (en) * 2019-06-14 2019-09-24 河钢股份有限公司承德分公司 A kind of high-strength IF steel plate and its production method
CN111254247A (en) * 2020-01-21 2020-06-09 江苏省沙钢钢铁研究院有限公司 Method for controlling titanium-containing IF steel continuous casting nozzle nodulation
CN112593142A (en) * 2020-10-26 2021-04-02 邯郸钢铁集团有限责任公司 Low-cost high-purity ultra-low carbon steel strip and production method thereof
CN112899576A (en) * 2021-01-15 2021-06-04 山东钢铁集团日照有限公司 Cold-rolled steel plate for precision household electric welding pipe and production method thereof

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