CN107723588A - A kind of car beam steel and its continuous acid-washing unit production method - Google Patents
A kind of car beam steel and its continuous acid-washing unit production method Download PDFInfo
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- CN107723588A CN107723588A CN201710829004.4A CN201710829004A CN107723588A CN 107723588 A CN107723588 A CN 107723588A CN 201710829004 A CN201710829004 A CN 201710829004A CN 107723588 A CN107723588 A CN 107723588A
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- Prior art keywords
- pickling
- car beam
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- beam steel
- washing unit
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of car beam steel and its continuous acid-washing unit production method, car beam is formed with steel chemical composition and weight/mass percentage composition is：C：0.070~0.170%, Si≤0.100%, Mn：0.800~1.700%, B≤0.050%, P≤0.030%, S≤0.008%, Als：0.016~0.030%, surplus is iron and inevitable impurity；Car beam steel continuous acid-washing unit production method includes：The control of pickling concentration, pickling temperature control, pickling speed control, addition passivator process.Car beam steel tensile strength >=420MPa of the inventive method production, yield strength >=340MPa；It can increase production >=50% using the inventive method production car beam steel within the identical production cycle, and product quality is stable, and compared to former technique, pickling qualification rate is promoted to more than 99.2% by 91%.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of car beam steel and its continuous acid-washing unit producer
Method.
Background technology
The automobile vehicles essential as the modern life, have entered into common people house.The motor vehicle in China
Recoverable amount increasingly increases, and sales volume also hits new peak repeatly.Automotive frame, curb girder series are a most important classes in automobile steel with steel
Type, it is desirable to have that in light weight, intensity is high, the security that should ensure to use, farthest realize economy and environmental protection again
The characteristics of property.Therefore it is high to the composition of the type steel grade, tissue, performance, surface quality requirements, if acid be present in belt steel surface
Wash defect or the problems such as scratching, dent be present, intensity, the service life of stamping parts can be caused in following process punch forming
The influence of aspect.If the strip surface quality of pickling process production does not reach processing request, it may result in and automobile making occur
Quality problems and the market expansion exploitation for influenceing product.Due to car beam composition of steel control and Technology for Heating Processing complexity, its table
The iron oxide structure in face is also extremely complex, removes iron scale to pickling and ensures that surface quality brings extreme difficulties, pickling life
Often occur a coiled strip steel during production overpickling to be present, owe pickling and normal pickling three kinds of contradictions, and with production line
Because band hardness of steel is high in equipment contact process, surface indentation defect is often resulted in.To ensure the smooth life of steel for automobile crossbeam
Due economical, societal benefits are produced and create, lifting pickling car beam is imperative with steel pickling quality.
Application number：CN201210143914.4, patent name：A kind of thickness is that 3.0~6.0mm straight carbon steels _ half technique is electric
The acid washing method of work steel.The patent of invention discloses the pickling that a kind of thickness is 3.0~6.0mm straight carbon steels/semi-technological electrical steel
Method, when free acid concentration is reduced to 110~120g/L and Fe from 180~200g/L in hydrochloric acid pickler2+Concentration rises to 50
Acid pickling promotor is added into hydrochloric acid pickler during~70g/L, the volume ratio for controlling acid pickling promotor and hydrochloric acid pickler is：
0.4~0.6: 100, at a temperature of 80~85 DEG C pickling carry out hot water rinsing after 40~70 seconds.Acid pickling promotor is by surface-active
Agent, organic coordination chelating agent, corrosion inhibiter, reducing agent and stabilizer are formulated, wherein surfactant concentration be 5~10g/L,
Organic coordination chelating agent concentrations are 20~40g/L, density of corrosion inhibitor is 10~20g/L, reductant concentration is 20~30g/L, steady
It is 10~15g/L to determine agent concentration.The surface of straight carbon steel/semi-technological electrical steel is removed with the hydrochloric acid pickler added with acid pickling promotor
Iron scale, pickling speed improve more than 35%, the similar effect in import acid pickling promotor of surface quality.
Application number：CN201610556820.8, patent name：Tensile strength is 440MPa level great surface qualities automobile using heat
Roll pickling steel and production method.Tensile strength is 440MPa level great surface quality automobile using hot rolling acid-cleaning steel, its component and wt%
For：C：0.090~0.120%, Si≤0.080%, Mn：1.100~1.500%, P≤0.025%, S≤0.006%, Als：0.015
~0.040%；Production method：Routine smelt and be casting continuously to form base, to heating strand, hot rolling, batch, section cooling, acid cleaning process.
The present invention rolls the production capacity more than needed production automobile using hot rolling acid-cleaning steel of on-line production line using cold rolling acid, utilizes last of five frames
Individual frame is controlled to the surface roughness of pickling steel, makes the surface roughness of product at 0.4~1.0 μm, and ton steel cost
Average specific prior art reduce be no less than 15%, while have good ductility, cold stamping forming property, welding performance with
And cold-bending property is good, meet the requirement of automobile using hot rolling acid-cleaning steel.
Above patent of invention and other patents are directed to the pickling work of car beam steel both for special steels such as electrical sheets
Skill is seldom.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of car beam steel；Present invention also offers a kind of automobile simultaneously
The continuous acid-washing unit production method of beam steel；It can effectively ensure that product quality and yield.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of car beam steel, the car beam
It is with steel chemical composition composition and weight/mass percentage composition：C：0.070~0.170%, Si≤0.100%, Mn：0.800~1.700%,
B≤0.050%, P≤0.030%, S≤0.008%, Als：0.016~0.030%, surplus is iron and inevitable impurity.
Car beam of the present invention steel tensile strength >=420MPa, yield strength >=340MPa.
Present invention also offers a kind of continuous acid-washing unit production method of car beam steel, the continuous acid-washing unit life
Production method includes：The control of pickling concentration, pickling temperature control, pickling speed control, addition passivator process.
Pickling concentration of the present invention controls process, and the free acid concentration control of 1# acid tanks is in 20-30g/L, 2# acid tank freedom
Acid concentration control is controlled in 95-110g/L in 45-90g/L, the free acid concentration of 3# acid tanks；2# acid tank is that level is combined sour tank, if
1st, when the free acid concentration of 3# tanks can not meet to require, 2# acid tank carries out acid adding operation.
Pickling temperature of the present invention controls process, and acid liquor temperature is 50-60 DEG C.
Pickling speed of the present invention controls process, pickling speed 60-80m/min；Pickling time≤3min.
It is of the present invention addition passivator process, addition rinsing passivator be LUBRO ANTIOX324, also may be selected containing
Alcamine compound 20-30%, boric acid 10-20% passivator.Increase washings cleansing power, make what belt steel surface remained
FeCl2 is reduced.
The inventive method production car beam steel can increase production >=50% within the identical production cycle, and product quality is stable,
Compared to former technique, pickling qualification rate is promoted to more than 99.2% by 91%.
Continuous acid-washing unit production car beam of the present invention is referred to steel technical indicator：JIS G 3131:2005.
The mentality of designing of the present invention is as follows：
1st, pickling concentration：Acid solution activity can effectively be reduced by reducing the concentration of pickling, reduce overpickling degree, using low concentration acid
Belt steel surface color can effectively be reduced by, which washing, becomes yellowish-brown.Groped by experiment, the free acid concentration control of 1# acid tanks is in 20-
The free acid concentration control of 30g/L, 3# tank acid solution is best in 95-110g/L effects.
2nd, pickling temperature：For jaundice situation in the middle part of belt steel surface, acid liquor temperature uses 50-60 DEG C, acid at a temperature of this
The reaction speed of liquid and steel matrix is smaller, both can guarantee that steel matrix occurs without serious overpickling macula lutea, moreover it is possible to which edge is thicker
Iron oxide cortex wash off.
3rd, pickling speed：In production, pickling speed is faster, and the turbulent flow that acid solution is formed in acid tank is more violent, acid and band
Steel surface iron scale contact area is also bigger, and pickling reaction is more violent, overpickling situation occurs to reduce strip, destroys pickling
Liquid turbulent flow is an effective selection, therefore reduction speed of production can reduce overpickling situation, typically use 60-80m/ at present
Min speed carries out pickling.
4th, medicament auxiliary pickling：Assistant medicament is added with the chlorion of significantly more efficient cleaning belt steel surface residual to subtract
Few pickled surface aberration.Addition rinsing passivator, increases washings cleansing power, the FeCl for remaining belt steel surface2Reduce, resistance
The only generation of following reaction：
Galvanic cell Mn ︱ MnCl2‖FeCl2︱ Fe
Anode reaction：Fe→Fe2++2e-
Cathode reaction：O2+2H2O+4e-→4OH-
Cell reaction：2Fe+O2+2H2O→2Fe(OH)2
General total acid number is 200g/L, iron ion 30g/L, free acid 160g/L.If the acid solution of these belt steel surfaces residual
Clean not in time, following reaction can be caused：
2HCl+Fe=FeCl2+H2 (1)
FeCl2+2H2O=Fe(OH)2+2HCl (2)
2Fe(OH)2+H2O+1/2O2=2Fe(OH)3 (3)
Fe (OH) 3 is the sediment of brownish red, unstable easily to decompose.
Fe(OH)3=FeO(OH)+H2O (4)
FeO (OH) is scale, influences product quality, while can directly contribute car beam steel surface aberration.
It is using beneficial effect caused by above-mentioned technical proposal：1st, the inventive method produces car beam steel identical
>=50% can be increased production in production cycle, and product quality is stable, and pickling qualification rate is promoted to more than 99.2% by 91%.2nd, this hair
The car beam product made from steel of bright method production is superior in quality, and new user is continuously increased, and the average car beam that monthly increases newly is ordered goods with steel
1500 tons of amount, can create benefit year more than 25,000,000 yuan.
Brief description of the drawings
Fig. 1 is the car beam steel figure of the continuous acid-washing unit of embodiment 1 production；
Fig. 2 is the car beam steel figure of the continuous acid-washing unit of embodiment 2 production；
Fig. 3 is the car beam steel figure of the continuous acid-washing unit of embodiment 3 production；
Fig. 4 is the car beam steel figure of the continuous acid-washing unit of embodiment 4 production；
FAQs and design sketch when Fig. 5 is car beam steel pickling；
FAQs and design sketch when Fig. 6 is car beam steel pickling.
Embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The present embodiment car beam is formed with steel chemical composition and weight/mass percentage composition is：C：0.070%, Si：0.100%, Mn：
0.800%, B：0.050%, P：0.030%, S：0.008%, Als：0.016%, surplus is iron and inevitable impurity.
The method of the present embodiment continuous acid-washing unit production car beam steel includes：The control of pickling concentration, pickling temperature control
System, pickling speed control and addition passivator process, concrete technology step are as described below：
（1）Pickling concentration controls：The free acid concentration control of 1# acid tanks is controlled in 95g/ in 20g/L, the free acid concentration of 3# tank acid solutions
The free acid concentration control of L, 2# acid tank is in 90g/L；
（2）Pickling temperature controls：Acid liquor temperature is 50 DEG C；
（3）Pickling speed controls：Pickling is carried out using 60m/min speed；Pickling time is 3min；
（4）Add passivator：LUBRO ANTIOX324 (passivator that Lu Baoli Science and Technology Ltd.s provide).
52% can be increased production using the present embodiment method production car beam steel within the identical production cycle, surface color is greyish white
Color, flank slightly shade, and have slight striped, but do not influence client's use；Pickling qualification rate is 99.4%.
The present embodiment car beam steel tensile strength 421MPa, yield strength 345MPa.
The car beam steel of the present embodiment continuous acid-washing unit production is shown in Fig. 1.
Embodiment 2
The present embodiment car beam is formed with steel chemical composition and weight/mass percentage composition is：C：0.17%, Si：0.05%, Mn：1.7%,
B：0.03%, P：0.01%, S：0.005%, Als：0.03%, surplus is iron and inevitable impurity.
The method of the present embodiment continuous acid-washing unit production car beam steel includes：The control of pickling concentration, pickling temperature control
System, pickling speed control and addition passivator process, concrete technology step are as described below：
（1）Pickling concentration controls：The free acid concentration control of 1# acid tanks is controlled in 100g/ in 25g/L, the free acid concentration of 3# tank acid solutions
L；
（2）Pickling temperature controls：Acid liquor temperature is 55 DEG C；
（3）Pickling speed controls：Pickling is carried out using 70m/min speed；Pickling time is 2.5min；
（4）Add passivator：LUBRO ANTIOX324.
55% can be increased production using the present embodiment method production car beam steel within the identical production cycle, surface color is greyish white
Color, flank color and other positions are basically identical, meet customer requirement；Pickling qualification rate is 99.7%.
The present embodiment car beam steel tensile strength 447MPa, yield strength 364MPa.
The car beam steel of the present embodiment continuous acid-washing unit production is shown in Fig. 2.
Embodiment 3
The present embodiment car beam is formed with steel chemical composition and weight/mass percentage composition is：C：0.10%, Si：0.07%, Mn：1.2%,
B：0.04%, P：0.015%, S：0.006%, Als：0.020%, surplus is iron and inevitable impurity.
The method of the present embodiment continuous acid-washing unit production car beam steel includes：The control of pickling concentration, pickling temperature control
System, pickling speed control and addition passivator process, concrete technology step are as described below：
（1）Pickling concentration controls：The free acid concentration control of 1# acid tanks is controlled in 105g/ in 27g/L, the free acid concentration of 3# tank acid solutions
L；
（2）Pickling temperature controls：Acid liquor temperature is 58 DEG C；
（3）Pickling speed controls：Pickling is carried out using 72m/min speed；Pickling time is 3min；
（4）Add passivator：LUBRO ANTIOX324.
50% can be increased production using the present embodiment method production car beam steel within the identical production cycle, surface color silvery white
Color, color uniformity, meets customer requirement；Pickling qualification rate is 100%.
The present embodiment car beam steel tensile strength 463MPa, yield strength 378MPa.
The car beam steel of the present embodiment continuous acid-washing unit production is shown in Fig. 3.
Embodiment 4
The present embodiment car beam is formed with steel chemical composition and weight/mass percentage composition is：C：0.13%, Si：0.07%, Mn：1.25%,
B：0.02%, P：0.022%, S：0.004%, Als：0.025%, surplus is iron and inevitable impurity.
The method of the present embodiment continuous acid-washing unit production car beam steel includes：The control of pickling concentration, pickling temperature control
System, pickling speed control and addition passivator process, concrete technology step are as described below：
（1）Pickling concentration controls：The free acid concentration control of 1# acid tanks is controlled in 110g/ in 30g/L, the free acid concentration of 3# tank acid solutions
The free acid concentration control of L, 2# acid tank is in 45g/L；
（2）Pickling temperature controls：Acid liquor temperature is 60 DEG C；
（3）Pickling speed controls：Pickling is carried out using 80m/min speed；Pickling time is 2min；
It can increase production 60% using the present embodiment method production car beam steel within the identical production cycle, surface color silvery white, face
The shinny uniformity of color, meet customer requirement, pickled surface coloration compliance rate 100%.
The present embodiment car beam steel tensile strength 497MPa, yield strength 392MPa.
The car beam steel of the present embodiment continuous acid-washing unit production is shown in Fig. 4.
FAQs and design sketch, pass through contrast, it can be seen that using this implementation when Fig. 5,6 are car beam steel pickling
Example carries out pickling, and product appearance surface color is canescence or silvery white, the shinny uniformity of color, meets customer requirement, acid
Surface color qualification rate 100% is washed, while the defects of pickling in Fig. 5,6 does not occur.
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (8)
1. a kind of car beam steel, it is characterised in that the car beam is formed with steel chemical composition and weight/mass percentage composition is：C：
0.070~0.170%, Si≤0.100%, Mn：0.800~1.700%, B≤0.050%, P≤0.030%, S≤0.008%, Als：
0.016~0.030%, surplus is iron and inevitable impurity.
A kind of 2. car beam steel according to claim 1, it is characterised in that the car beam with steel tensile strength >=
420MPa, yield strength >=340MPa.
3. the continuous acid-washing unit production method based on a kind of car beam steel described in claim 1 or 2, it is characterised in that
The continuous acid-washing unit production method includes：The control of pickling concentration, pickling temperature control, pickling speed control, addition passivation
Agent process.
4. the continuous acid-washing unit production method of a kind of car beam steel according to claim 3, it is characterised in that described
Pickling concentration controls process, and the free acid concentration control of 1# acid tanks is controlled in 45-90g/ in 20-30g/L, the free acid concentration of 2# acid tanks
The free acid concentration control of L, 3# acid tank is in 95-110g/L；2# acid tank is that level is combined sour tank.
5. the continuous acid-washing unit production method of a kind of car beam steel according to claim 3, it is characterised in that described
Pickling temperature controls process, and acid liquor temperature is 50-60 DEG C.
6. a kind of continuous acid-washing unit production method of car beam steel according to claim 3-5 any one, it is special
Sign is that the pickling speed controls process, pickling speed 60-80m/min；Pickling time≤3min.
7. a kind of continuous acid-washing unit production method of car beam steel according to claim 3-5 any one, it is special
Sign is that the addition passivator process, addition rinsing passivator is LUBRO ANTIOX324.
8. a kind of continuous acid-washing unit production method of car beam steel according to claim 3-5 any one, it is special
Sign is that the production method produces car beam steel within the identical production cycle can increase production >=50%, pickling qualification rate 99.2%
More than.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017209414143 | 2017-07-31 | ||
| CN201720941414 | 2017-07-31 |
Publications (1)
| Publication Number | Publication Date |
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| CN107723588A true CN107723588A (en) | 2018-02-23 |
Family
ID=61206271
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| CN201710829004.4A Withdrawn CN107723588A (en) | 2017-07-31 | 2017-09-14 | A kind of car beam steel and its continuous acid-washing unit production method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07126807A (en) * | 1993-11-08 | 1995-05-16 | Nkk Corp | Steel sheet excellent in formability and hardenability by high energy density beam irradiation and its production |
| EP0940477A1 (en) * | 1998-03-05 | 1999-09-08 | Kawasaki Steel Corporation | Wide-flange beams made from a steel with high toughness and yield strength, and process for manufacturing these products |
| CN102787273A (en) * | 2012-08-21 | 2012-11-21 | 武汉钢铁(集团)公司 | Sheet-billet produced hot-rolled pickled steel with thickness of 1.8mm or lower for automobile and production method thereof |
| CN103157690A (en) * | 2013-02-26 | 2013-06-19 | 河北钢铁股份有限公司唐山分公司 | Production method of hot-rolling and acid-washing automobile crossbeam steel belt |
| CN104988386A (en) * | 2015-06-19 | 2015-10-21 | 唐山钢铁集团有限责任公司 | Method for producing high-hole-expansion-rate steel 420L for automotive frame |
| CN106011632A (en) * | 2016-07-15 | 2016-10-12 | 武汉钢铁股份有限公司 | High-surface-quality hot-rolled pickling steel with tensile strength being 440 MPa and for automobiles and production method |
-
2017
- 2017-09-14 CN CN201710829004.4A patent/CN107723588A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07126807A (en) * | 1993-11-08 | 1995-05-16 | Nkk Corp | Steel sheet excellent in formability and hardenability by high energy density beam irradiation and its production |
| EP0940477A1 (en) * | 1998-03-05 | 1999-09-08 | Kawasaki Steel Corporation | Wide-flange beams made from a steel with high toughness and yield strength, and process for manufacturing these products |
| CN102787273A (en) * | 2012-08-21 | 2012-11-21 | 武汉钢铁(集团)公司 | Sheet-billet produced hot-rolled pickled steel with thickness of 1.8mm or lower for automobile and production method thereof |
| CN103157690A (en) * | 2013-02-26 | 2013-06-19 | 河北钢铁股份有限公司唐山分公司 | Production method of hot-rolling and acid-washing automobile crossbeam steel belt |
| CN104988386A (en) * | 2015-06-19 | 2015-10-21 | 唐山钢铁集团有限责任公司 | Method for producing high-hole-expansion-rate steel 420L for automotive frame |
| CN106011632A (en) * | 2016-07-15 | 2016-10-12 | 武汉钢铁股份有限公司 | High-surface-quality hot-rolled pickling steel with tensile strength being 440 MPa and for automobiles and production method |
Non-Patent Citations (1)
| Title |
|---|
| 朱志强等: "《钢化学分析与物理检测》", 30 June 2013, 冶金工业出版社 * |
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