CN110499447A - Steel for electroplating fastening belt buckle and manufacturing method thereof - Google Patents
Steel for electroplating fastening belt buckle and manufacturing method thereof Download PDFInfo
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- CN110499447A CN110499447A CN201910821761.6A CN201910821761A CN110499447A CN 110499447 A CN110499447 A CN 110499447A CN 201910821761 A CN201910821761 A CN 201910821761A CN 110499447 A CN110499447 A CN 110499447A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000009713 electroplating Methods 0.000 title abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000007747 plating Methods 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000009749 continuous casting Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010583 slow cooling Methods 0.000 claims description 2
- 239000010949 copper Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 11
- 239000011572 manganese Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000005261 decarburization Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000010301 surface-oxidation reaction Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- -1 meanwhile Substances 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a steel for an electroplating fastening belt buckle and a manufacturing method thereof, wherein the steel comprises the following steps: 0.37% -0.45%, Si: less than or equal to 0.30 percent, Mn: 0.2-0.8%, Cr: less than or equal to 0.50 percent, Al: 0.015% -0.06%, Cu: less than or equal to 0.4 percent, Sb: less than or equal to 0.2 percent, less than or equal to 0.030 percent of impurity element P, less than or equal to 0.030 percent of S, and the balance of Fe and inevitable impurities.
Description
Technical field
The present invention relates to a kind of bolt taut band buckle steel, more particularly to a kind of bolt taut band buckle hot rolling of suitable plating
Strip and its manufacturing method.
Background technique
Common bolt taut band buckle is with the general manufacturing procedure of steel: hot rolling board raw material-punch forming-heat treatment-ramming-rolling
Optical-electronic plating-assembling.Common bolt taut band buckle of crossing requires hardness 37-41HRC after heat treatment, and tensile strength requires 49KN continuous.For
Guarantee plating rear surface zero defect, bolt taut band buckle bayonet is generally made using cold-reduced sheet and is processed raw material.In recent years, for save at
This, many producers directly process bolt taut band buckle bayonet using hot rolled steel plate, but it is tight that rear surface mildew pit corrosion defect is electroplated
Weight, i.e. influence aesthetic appearance, and reduce the service life.Moreover, as environmental requirement is constantly promoted and production cost problem, downstream
User's electroplating technology is also constantly changing, for example, some users eliminate the ramming technique before plating, causes to be made with hot rolled plate former
Dotted mildew corrosion default is more serious after the bolt taut band buckle bayonet plating of material production, and qualification rate only up to 30% is electroplated.
CN201380019097.4, C:0.0005%- in " plating steel plate and electroplating steel plate and their manufacturing method "
0.005%, while adding a small amount of alloys such as Cr, Si, Mn, belong to ultra-low-carbon steel, intensity rank is low, is unsatisfactory for bolt taut band buckle and is drawn with steel
It stretches and changing firmness requirements;CN200920274053.7, " binding and tightening belt " are a kind of steel grades that puller strap device foregoing invention refers to
And there is certain defect in production method, be unsuitable for bolt taut band buckle use demand.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of bolt taut band buckle steel, bolt taut band buckle is used
Hardness 37-41HRC after steel heat treatment, plating performance is good, and surface is without corrosion defaults such as mildews.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of plating bolt taut band buckle steel, it is characterised in that chemical composition comprises the following components in percentage by weight are as follows: C:0.37%~
0.45%, Si :≤0.30%, Mn:0.2%~0.8%, Cr :≤0.50%, Al:0.015%-0.06%, Cu :≤0.4%,
Sb :≤0.2%, impurity element P≤0.030%, S≤0.030%, surplus are Fe and inevitable impurity.
Each alloying component mechanism of action of steel of the present invention detailed below:
C is main solution strengthening element in steel.If C content is lower than 0.37%, it is difficult to ensure that hardness after heat treatment, separately
If one side C content is higher than 0.45%, the competency of steel is improved, and toughness plasticity deteriorates, easy brittle failure.Therefore, C content will control
0.37%~0.45%.
Mn is good deoxidier and desulfurizing agent, is the essential elements for guaranteeing the intensity and toughness of steel.Manganese and iron form solid
Solution can improve the hardness and strength of ferrite and austenite in steel.Mn forms MnS in conjunction with S, and grain boundaries is avoided to form FeS
Caused by fire check influence saw blade steel hot-forming property.Mn is also good deoxidier and increases harden ability simultaneously.Mn contains
Measure it is too low, be not able to satisfy heat treatment after high competency requirement, Mn too high levels is easily formed segregated zone influence welding performance, and increasing
Add production cost, therefore, the factors such as considering cost and performance requirement, Mn content should be controlled 0.2%~0.80%.
Si is one of common elements in steel, and reducing agent and deoxidier are used as in steelmaking process, and the Si for being dissolved form can be mentioned
High-yield strength and ductile-brittle transition temperature, if but Si too high levels will reduce toughness and welding performance.On the other hand, Si is iron element
Body formation element can promote steel surface decarburization, and therefore, Si content is not easy excessively high, Si≤0.30%.
Cr is the harden ability element for significantly improving steel, and suitable Cr, which is added, in steel so that C curve is moved to right, and is obtained under identical cooling rate
The pearlite piece spacing obtained more refines.For high-carbon steel, the activation energy of carbon spread is can be improved in Cr, and the decarburization for mitigating steel is inclined
To.On the other hand, ferrite electrode potential also can be improved in Cr, promotes the surface of steel to form fine and close oxidation film, it is anti-corrosion to improve its
Property.Cr too high levels increase cost of alloy, and steel-plate shape is poor, it is difficult to it smooths, therefore, present invention control Cr content≤
0.50%.
Al:0.015%-0.06%, when smelting, generally make deoxidier with Al, can also refine crystal grain, improve intensity, but same
When also easily formed the oxide containing Al be mingled with, influence the punch forming performance of steel.Therefore, Al content control is in 0.015%-
0.06%.
The outstanding role of Cu:Cu≤0.5%, Cu in steel is the weather-resistant performance for improving steel, meanwhile, copper is added also
The intensity and yield ratio of steel can be improved, when punching press is indeformable.Cu is often used cooperatively with P in corrosion-resisting steel, and Cu and P can be concentrated in rust
In layer, keep its form compact and stable, and the extension of iron rust can be inhibited.When [Cu] lower (about 0.01%), 0.06~0.10%P is added
Afterwards, the corrosion resistance of steel improves more than 2 times.When [Cu] is higher (0.4% or so), 0.10%P is added, corrosion resistance only improves 20-
40%, illustrating P, there are extremely complex relationships with Cu.For guarantee punching performance, the present invention in P content be not easy it is excessively high, therefore,
A small amount of Cu is added.
Antimony is added in steel in Sb:Sb≤0.2%, can generally make the strength reduction of steel, and brittleness increases, but is added a certain amount of
After antimony, the resistance to corrosion and wearability of steel can be improved, therefore≤0.2% antimony is added in steel of the present invention, it is corrosion-resistant to improve
Ability and wearability.
P and S is inevitable objectionable impurities in steel, the toughness of their presence meeting severe exacerbation steel.Therefore it to adopt
Measure is taken to reduce P the and S content in steel as far as possible.According to the present invention, highest P content is limited in 0.030%, highest S content
It is limited in 0.030%.
Carbon content in mentioned component design use, the alloying elements such as addition Mn, Cr, Si, Cu improve steel plate harden ability, quench
Hardness and heat resistance guarantee competency after steel plate heat treatment.Micro Nb, V, Al are added simultaneously, refines crystal grain, after improving heat treatment
Toughness plasticity guarantees thermal stability and low-temperature flexibility.
A kind of plating bolt taut band buckle manufacturing method of steel, it is characterised in that: including smelting, continuous casting, hot rolling and slow cooling;
Continuous casting steel billet thickness is not less than 170mm, and slab upper and lower surface is online or offline sprayed coating, enters after spraying and heats stove heating, slab
500 DEG C of charging temperature or less;When slab on-line spray, thickness 0.2-0.4mm is applied;Under slab when wire spraying, thickness 0.4- is applied
0.6mm;Heating furnace use weak oxide atmosphere, coefficient of excess air 1.1-1.8,1100~1180 DEG C of slab heating temperature,
Keep the temperature 3-5h;Smart roughing is all made of high-pressure water descaling, and intensity is greater than 15MPa;Roughing first rolling pass reduction is greater than 30%, open rolling temperature
1050 DEG C~1150 DEG C of degree, 80% or more finish rolling total reduction, 800 DEG C~950 DEG C of finish rolling finishing temperature;Strip goes out finishing mill
Afterwards, it is batched with being cooled to 750 DEG C or less greater than 10 DEG C/S~70 DEG C/S cooling rate.
Using converter smelting, LF or RH external refining processing, Al makees deoxidier, guarantees Molten Steel Cleanliness.
For uniform formation, microstructure segregation is controlled, roughing and finish rolling have been required to enough reduction ratios, slab minimum thickness
It cannot be less than 170mm.Slab upper and lower surface is online or offline sprayed coating, coating material form protective layer in casting billet surface, have
Effect inhibits the generation of surface crystal boundary micro-crack.When slab hot delivery and hot charging sprays, thickness 0.4-0.6mm is applied;Slab is offline to let cool spray
Tu Shi applies thickness 0.2-0.4mm.Steel slab surface, ineffective, overweight coating, heating process cannot be completely covered in cover light
Middle steel slab surface coating easily forms flaking, does not work.
It is rolled by refining, continuous casting, using hot tandem.To be energy saving, continuous casting billet can be using hot sending warm
Dress technique, but require slab charging temperature less than 500 DEG C, it avoids casting billet surface oxidation and decarbonization serious, generates surface grain boundary oxidation
Crackle influences plating performance.Slab heating temperature is lower, and 1100~1180 DEG C, and 15MPa or more high-pressure water descaling is used, it goes
Except scale on surface, to reduce the skin decarburization oxidation of finished steel plate, guarantee that monoplanar surface decarburized layer deepness is less than plate thickness
1.5%, no grain boundary oxidation, hot rolled plate surface roughness 1.2um or less.
It is greater than 30% heavy reduction rate using first passage, 800 DEG C~950 DEG C of finishing temperature, austenitic area rolling is crushed casting
Base microstructure segregation, mitigation finished product is band-like, improves finished product structural homogenity.10 DEG C/S~70 DEG C/S is cooled fast to 750 DEG C or less
It batches, inhibits surface oxidation decarburization, control hot rolled plate surface roughness 1.2um hereinafter, controlling plating performance in turn.Cooling rate is lower than
The oxidizable decarburization of 10 DEG C/S surface of steel plate, surface grain boundary oxidation is serious, easily formation crizzle, and pit corrosion is easily gone out after plating
Defect seriously affects plating performance.Cooling rate is higher than 70 DEG C/S, and cooling rate is too fast, Widmannstatten structure easily generated, and toughness plasticity is poor.
The beneficial effects of the present invention are: the steel plate of application technical solution disclosed by the invention production is organized to be uniformly thin
Small ferrite and pearlite, hardness 38HRC or more after heat treatment, monoplanar surface decarburized layer deepness are less than 1.5% times of plate thickness, steel
Plate surface is without grain boundary oxidation micro-crack, and hot rolled plate surface roughness 1.2um is hereinafter, resistance to bimatallic corrosion is had excellent performance, bimatallic corrosion
Qualification rate 100%.
Detailed description of the invention
Fig. 1 is practical 5 skin decarburization pattern of example;
Fig. 2 comparative example skin decarburization pattern;
5 plate surface pattern of Fig. 3 embodiment;
Fig. 4 comparative example plate surface pattern (dotted mildew).
Specific embodiment
It is illustrated combined with specific embodiments below:
For following embodiment for illustrating the content of present invention, these embodiments are only the general description of the content of present invention,
The content of present invention is not limited.Table 1 is the chemical component of steel of the embodiment of the present invention, and table 2 is steel of the embodiment of the present invention
Production technology, table 3 are the performance of embodiment steel plate.
Chemical component (surplus is iron) wt% of 1 steel of the embodiment of the present invention of table
Number | C | Si | Mn | P | S | Cr | Cu | Sb | Al |
Embodiment 1 | 0.42 | 0.30 | 0.50 | 0.015 | 0.005 | 0 | 0 | 0 | 0.033 |
Embodiment 2 | 0.45 | 0.15 | 0.52 | 0.004 | 0.009 | 0.15 | 0.22 | 0.032 | 0.055 |
Embodiment 3 | 0.38 | 0.16 | 0.41 | 0.008 | 0.02 | 0.12 | 0.15 | 0.055 | 0.038 |
Embodiment 4 | 0.40 | 0 | 0.58 | 0.010 | 0.018 | 0 | 0.02 | 0.009 | 0.018 |
Embodiment 5 | 0.45 | 0.25 | 0.62 | 0.012 | 0.004 | 0.45 | 0.28 | 0 | 0.040 |
Embodiment 6 | 0.37 | 0 | 0.79 | 0.014 | 0.003 | 0.19 | 0.32 | 0 | 0.058 |
Embodiment 7 | 0.40 | 0.08 | 0.48 | 0.013 | 0.008 | 0.25 | 0.27 | 0.075 | 0.055 |
Embodiment 8 | 0.45 | 0.16 | 0.70 | 0.014 | 0.004 | 0.48 | 0.01 | 0.020 | 0.027 |
Embodiment 9 | 0.44 | 0.10 | 0.69 | 0.012 | 0.007 | 0.25 | 0.35 | 0.010 | 0.038 |
Embodiment 10 | 0.39 | 0.18 | 0.68 | 0.010 | 0.01 | 0.14 | 0.13 | 0.006 | 0.045 |
Embodiment 11 | 0.44 | 0.15 | 0.42 | 0.008 | 0.007 | 0.28 | 0.45 | 0.013 | 0.058 |
Embodiment 12 | 0.42 | 0.27 | 0.35 | 0.013 | 0.006 | 0.15 | 0.06 | 0.20 | 0.015 |
Embodiment 13 | 0.40 | 0.30 | 0.60 | 0.013 | 0.008 | 0.25 | 0.27 | 0.035 | 0.058 |
Embodiment 14 | 0.45 | 0.08 | 0.45 | 0.014 | 0.004 | 0.08 | 0 | 0.17 | 0.029 |
Embodiment 15 | 0.43 | 0.09 | 0.48 | 0.012 | 0.007 | 0.25 | 0.15 | 0.038 | 0.025 |
Embodiment 16 | 0.39 | 0.07 | 0.52 | 0.030 | 0.01 | 0.16 | 0.03 | 0.11 | 0.035 |
Embodiment 17 | 0.42 | 0.16 | 0.80 | 0.025 | 0.025 | 0.32 | 0.25 | 0.021 | 0.029 |
Embodiment 18 | 0.41 | 0.06 | 0.2 | 0.004 | 0.009 | 0.45 | 0.02 | 0.002 | 0.048 |
2 production technology of table
3 plate property of table
Claims (2)
1. a kind of plating bolt taut band buckle steel, it is characterised in that chemical composition comprises the following components in percentage by weight are as follows: C:0.37%~
0.45%, Si :≤0.30%, Mn:0.2%~0.8%, Cr :≤0.50%, Al:0.015%-0.06%, Cu :≤0.4%,
Sb :≤0.2%, impurity element P≤0.030%, S≤0.030%, surplus are Fe and inevitable impurity.
2. the manufacturing method that a kind of plating bolt taut band buckle according to claim 1 uses steel, it is characterised in that: including smelting
Refining, continuous casting, hot rolling and slow cooling;Continuous casting steel billet thickness is not less than 170mm, and slab upper and lower surface is online or offline sprayed coating, spraying
After enter to heat stove heating, 500 DEG C of slab charging temperature or less;When slab on-line spray, thickness 0.2-0.4mm is applied;Slab is offline
When spraying, thickness 0.4-0.6mm is applied;Heating furnace uses weak oxide atmosphere, coefficient of excess air 1.1-1.8, slab heating
1100~1180 DEG C of temperature, keep the temperature 3-5h;Smart roughing is all made of high-pressure water descaling, and intensity is greater than 15MPa;The pressure of roughing head passage
Rate is greater than 30%, 1050 DEG C~1150 DEG C of start rolling temperature, 80% or more finish rolling total reduction, finish rolling finishing temperature 800 DEG C~950
℃;After strip goes out finishing mill, batched with being cooled to 750 DEG C or less greater than 10 DEG C/S~70 DEG C/S cooling rate.
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