CN109695006A - Corrosion-resistant steel for chain plate and manufacturing method thereof - Google Patents

Corrosion-resistant steel for chain plate and manufacturing method thereof Download PDF

Info

Publication number
CN109695006A
CN109695006A CN201710996936.8A CN201710996936A CN109695006A CN 109695006 A CN109695006 A CN 109695006A CN 201710996936 A CN201710996936 A CN 201710996936A CN 109695006 A CN109695006 A CN 109695006A
Authority
CN
China
Prior art keywords
steel
rolling
corrosion
carrier bar
continuous casting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710996936.8A
Other languages
Chinese (zh)
Inventor
杨玉
丁燕勇
关菊
刘祥
刘凤莲
郭晓宏
孟凡志
张吉富
刘志伟
张瑞琦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201710996936.8A priority Critical patent/CN109695006A/en
Publication of CN109695006A publication Critical patent/CN109695006A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/0236—Cold rolling
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • 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)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

The invention provides a corrosion-resistant steel for a chain plate and a manufacturing method thereof, wherein the steel plate comprises the following components in percentage by weight: c: 0.40% -0.70%, Si: 0.1-0.40%, Mn: 0.5.0% -1.0%, Cr: 0.1-0.5%, Cu 0.1-0.5%, Sb: 0.03-0.2%, Al 0.015-0.050%, Sn: 0.02-0.3 percent, less than or equal to 0.035 percent of impurity element P, less than or equal to 0.010 percent of S, and the balance of Fe and inevitable impurities. The manufacturing method comprises smelting, continuous casting, rolling and cold rolling. The steel plate chain plate produced by the invention has the stamping yield of more than 98 percent, the depth of a decarburized layer on the surface of the steel plate is less than or equal to 0.02mm, the hardness after heat treatment is uniform, the performances such as fatigue, impact and the like meet the requirements, the corrosion resistance is obviously improved, and the average corrosion rate is less than 25g/m2·h。

Description

A kind of corrosion-resistant carrier bar steel and its manufacturing method
Technical field
The invention belongs to field of material processing more particularly to a kind of corrosion-resistant carrier bar cold-strip steel and its manufacturing methods.
Background technique
Currently, carrier bar mostly uses 40Mn, 45Mn steel plate to be process, generally require surface of steel plate hardness in 85HRB- 90HRB, to guarantee quality of edges after punching press.Hot rolled plate directly processes carrier bar, and there are steel surface iron oxide scale, process is easy It gets rusty, the defects such as punch process lumber recovery is low influence the problems such as being heat-treated rear surface hardness.
Patent " a kind of annular chains steel and its manufacturing method " (CN102653834A) is open, and introduce is added with profile Work ring chain, chain steel carbon content is low, and normative heat treatment technique is not able to satisfy carrier bar hardness requirement.
Invent " chain board " (CN 2206868Y) introduction is the improvement of chain and chain-plate in shape, does not refer to material.
" development of bicycle chain 18MnZL hot-strip ", " Chemical Composition of Steel for Racing Bicycle Chain design ", " Wuhan Iron and Steel Plant is cold Roll the exploitation and application of chain steel " etc. papers be cold-rolled steel sheet steel.
" heat treatment process test of 50CrVA steel silent chain carrier bar " 50CrVA is for manufacturing the higher tooth form of hardness requirement Chain is unsuitable for processing common thin gauge carrier bar.
The 16Mn circular chain steel carbon content that " fracture analysis of 16Mn steel chain plate " is introduced is low, to be just able to satisfy firmly by Carburization Treatment Degree requires, complex process.
The steel grade that above-mentioned document and invention refer to is unsuitable for directly fabricating carrier bar with hot rolled plate.Therefore, this project A kind of cold-strip steel and its manufacturer that the corrosion-resistant carrier bar of lightweight is required suitable for fabricating motorcycle, bicycle etc. is invented Method.
Summary of the invention
A kind of tired, impact is provided it is an object of the invention to overcome the above problem and deficiency, the performances such as corrosion resistance Excellent corrosion-resistant carrier bar steel and its manufacturing method.
What the object of the invention was realized in:
A kind of corrosion-resistant carrier bar steel, the ingredient of the steel plate are as follows by weight percentage: C:0.40%~0.70%, Si:0.1%~0.40%, Mn:0.5.0%~1.0%, Cr:0.1%~0.5%, Cu:0.1%~0.5%, Sb:0.03% ~0.2%, Al:0.015%~0.050%, Sn:0.02%~0.3%, impurity element P≤0.035% and S≤0.010%, Surplus is Fe and inevitable impurity.
The final tissue of the corrosion-resistant carrier bar steel of the present invention is spheroidizing pearlite+ferrite+shred layer pearlite mixing group It knits, 1-2 grades of pearlitic spheroidization rate, shred layer pearlite accounts for 40%-70%.
It is as follows that present component designs reason:
C:0.40%~0.70%
C is main solution strengthening element in steel.If C content is lower than 0.40%, it is difficult to ensure that after carrier bar heat treatment Hardness deteriorates the toughness plasticity of steel if another aspect C content is higher than 0.70%.Therefore, C content to control 0.40%~ 0.70%.Carbon content range 0.40%~0.70%, it is ensured that carrier bar has under the conditions of lightweight thin gauge with enough strong Degree.
Mn:0.5%~1.0%
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 carrier bar steel performance.Mn is also good deoxidier and increases harden ability simultaneously.Middle low carbon steel Middle Mn content is low, is not able to satisfy the requirement of high competency after heat treatment, and the easy forming component segregation of Mn too high levels influences to be heat-treated Uniformity of hardness afterwards, and increase production cost, therefore, the factors such as considering cost and performance requirement, Mn content should control 0.5%~1.0%.
Si:0.1%~0.40%
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 being more than that upper content limit will reduce toughness and welding performance.Therefore 0.1%~ 0.40% Si, which is retained in steel, to be necessary.
Cr:0.1%~0.5%
Cr can significantly improve the harden ability of steel, pearlite piece spacing can be refined, thus thinning microstructure.Chromium can significantly improve Intensity, hardness and wearability, but plasticity and toughness are reduced simultaneously.Chromium can improve the inoxidizability and corrosion resistance of steel again.Cr can To improve the activation energy of carbon spread, mitigate the decarburizing tendency of steel, compared with Si, Cr is less susceptible to promote decarburization, therefore, adds in steel Enter suitable Cr, refine textura epidermoidea, reduce decarburized layer deepness, improves surface of steel plate competency.Cr may be used also to a certain extent To improve the weather-resistant performance of steel with elements collective effects such as Cu, Sb.Cr content is low, and hardness is insufficient after heat treatment, and Cr contains Measure excessively high, increase cost of alloy.Therefore, the present invention controls in 0.1~0.5% range of Cr content.
Cu:0.1%~0.5%
Outstanding role of the Cu in steel is the weather-resistant performance for improving steel, meanwhile, copper, which is added, can also improve the strong of steel Degree and yield ratio, when punching press, are indeformable.Cu is often used cooperatively with P in corrosion-resisting steel, and Cu and P can be concentrated in rusty scale, makes its cause Close stabilization, and the extension of iron rust can be inhibited.When [Cu] lower (about 0.01%), be added 0.06~0.10%P after, steel it is anti-corrosion Property improve more than 2 times.When [Cu] is higher (0.4% or so), 0.10%P is added, corrosion resistance only improves 20-40%, illustrates P and Cu There are extremely complex relationships.To guarantee punching performance, the P content in the present invention is not easy excessively high, therefore, a small amount of Cu is added.
Sb:0.03%~0.2%
Antimony is added in steel, can generally make the strength reduction of steel, brittleness increases, but after a certain amount of antimony of addition, can improve steel Resistance to corrosion and wearability, therefore in steel of the present invention be added 0.03%~0.2% antimony, to improve the corrosion-resistant energy of carrier bar Power and wearability.
Al:0.015%~0.050%,
Aluminium is common deoxidier in steel.A small amount of aluminium is added in steel, crystal grain can be refined, improves impact flexibility, aluminium also has There are inoxidizability and corrosion resistance, aluminium is shared with chromium, silicon, is remarkably improved the high temperature non-scale performance and high-temperature corrosion resistance of steel Ability, improve plate surface quality.Aluminium is excessively high, easily forms oxide and is mingled with, influences chain fatigue behaviour.Therefore, Al is controlled Content 0.015%~0.050%.
Sn:0.02%~0.3%,
A small amount of Sn is added in steel can improve intensity and corrosion resistance, and influence on plasticity little.Therefore in steel of the present invention ≤ 0.3% tin is added, to improve the corrosion resistance of carrier bar.
P≤0.035%
Phosphorus is non-carbide forming element, its existence form in steel is mainly dissolved in ferrite.It is generally believed that phosphorus It is harmful element in steel, it reduces the impact flexibility of steel, improves the brittle temperature of steel, deteriorates the welding performance of steel.But for For weathering steel, phosphorus is a kind of useful element, and the phosphorus content in weathering steel is between 0.04~0.15%, and P and Cu add simultaneously Enter in steel, keeps interior rusty scale point band obvious, be more advantageous to the corrosion resistance for improving steel.The compound action of Cu, P are easier to make to be formed in rusty scale Amorphous protective layer Fe3O4, because Cu and P ion prevent Fe jointly3O4Crystalline growth so that rusty scale stability it is good and organize It is fine and compact, contact of the corrosive medium with steel matrix has been isolated, simultaneously as it has high impedance, has greatly slowed down corrosion Electron transfer between anode region and cathodic region inhibits the corrosion inside steel to reduce electrochemical reaction rates.But P content Height will affect carrier bar stampability, therefore, control P≤0.035%
S :≤0.010%
P and S is inevitable objectionable impurities in steel, the toughness of their presence meeting severe exacerbation steel, therefore to be adopted Measure is taken to reduce P the and S content in steel as far as possible.According to the present invention, highest S content is limited in 0.010%.
Preferably, hot rolled plate tissue is nodularization pearl for C content in mentioned component design use, steel plate toughness plasticity and competency matching Body of light+ferrite+shred layer pearlite, punching performance are preferable.By adding Mn and Cr element, improving steel plate harden ability and hardening Property, mitigate surface of steel plate decarburization, while trace of Al and Cu, Sb, P is added, makes to form amorphous protective layer Fe in rusty scale3O4, because Cu and P ion prevent Fe jointly3O4Crystalline growth corrosive medium has been isolated so that rusty scale stability is good and fine microstructures are fine and close Contact with steel matrix greatly slows down the electronics of corrosion anode region and cathode section simultaneously as it has high impedance Migration inhibits corrosion inside steel to reduce electrochemical reaction rates.Crystal grain is refined, guarantees plate surface quality, improves heat Plate punching performance is rolled, and corrosion resistance can be improved.
The two of technical solution of the present invention are to provide a kind of manufacturing method of corrosion-resistant carrier bar steel, including smelting, refining, company Casting, rolling, cold rolling,
(1) smelting process: LF+RH duplex refining treatment is used, it is desirable that processing time 40min or more, so as to nonmetallic folder Sundries floats sufficiently, guarantees steel quality, improves the fatigue behaviour of finished product carrier bar；
(2) it rolls:
(a) hot delivery and hot charging after continuous casting；Using hot rolling technology, high-pressure water descaling, high pressure water work pressure are all made of before smart roughing Power is greater than 200MPa, guarantees finished steel plate surface quality；1050 DEG C~1150 DEG C of roughing start rolling temperature, first rolling pass reduction is greater than 30%, 1000 DEG C -1100 DEG C of finish rolling start rolling temperature, finishing temperature control is at 800 DEG C~920 DEG C；
(b) cooling after rolling: to use uniform cooling technique, be cooled to 700 DEG C~780 with 10 DEG C/S~50 DEG C/S cooling rate It DEG C is batched, is utilized the slow cooling of coil of strip waste heat 72 hours or more.
(c) cold rolling: pickling and cold-rolling is used, hot rolled coil is after 10%-30%HCl solution pickling, cold rolling overall reduction 0.2- 1mm coils into strip after oiling, to roll hard state delivery.
The technical solution that the present invention further limits:
Molten steel is produced using continuous casting mode in continuous casting process of the present invention, is stirred in continuous casting process using slighter compress and electromagnetism Mix technique, continuous casting steel billet thickness 150mm-250mm.
Slab is not offline after continuous casting of the present invention, direct hot delivery and hot charging, reduces slab using the production technology of hot delivery and hot charging and exists Residing time in furnace is heated, slab decarburizing tendency in heating furnace is reduced, also can reduce the skin decarburization depth of steel.Heating furnace Interior bringing-up section weak oxide atmosphere, soaking zone reducing atmosphere help to reduce casting billet surface decarburization.When slab stops in furnace Between it is too long, temperature is excessively high to will increase slab decarburizing tendency, it is therefore desirable to 1150 DEG C~1220 DEG C of bringing-up section furnace temperature, air coefficient It is 1.0~1.20, guarantee bringing-up section is weak oxide atmosphere；1100 DEG C~1200 DEG C of soaking zone furnace temperature, air coefficient 0.80 ~1.00, guarantee soaking zone is reducing atmosphere；Slab stops 1.5~3 hours total times, slab tapping temperature 1100 in furnace DEG C~1150 DEG C.
By converter smelting, LF+RH refine, control refining time be greater than 40 minutes, so as to non-metallic inclusion sufficiently on Floating charge point guarantees to use slighter compress and electromagnetic agitation technique in inclusion content continuous casting process less in molten steel, mitigate inclined Analysis improves the fatigue behaviour of finished product chain.
Slab thickness 150mm-250mm. is to keep surface of steel plate crystal grain tiny, reduces skin decarburization layer depth, slab rolled steel To guarantee there are enough compression ratios when plate.And the big compression ratio of hot rolling can mitigate microstructure segregation, improve structural homogenity, improve tired Labor performance.
Slab is reduced using the production technology of the big compression ratio continuous casting and rolling of slab and the production technology of hot delivery and hot charging heating Residing time in furnace, and slab heating process is controlled, slab decarburizing tendency in heating furnace can be reduced, the decarburization of steel plate is reduced Layer depth guarantees that steel plate heat treatment rear surface hardness is uniform.If the offline cold charge of slab, time inside furnace is long, and heating temperature is high, steel plate It is serious to roll rear surface decarburization, heat treatment rear surface hardness is uneven, influences service life.
It is greater than 30% heavy reduction rate using first passage, is crushed continuous casting billet structure and is segregated, mitigation finished product banded structure, 800 DEG C ~920 DEG C of zerollings refine original austenite grains degree, improve finished product structural homogenity.
Using slow cooling, the technique of high temperature coiling and slow cooling is made annealing treatment using coil of strip own temperature, forms spheroidizing pearlite + ferrite+fine pearlite line and staff control guarantees 1-2 grades of pearlitic spheroidization rate, and shred layer pearlite accounts for 40%-70%, Punch forming rate is improved, does tissue preparation for heat treatment process, guarantees structural homogenity after heat treatment, it is hard after satisfaction heat treatment The performance requirements such as degree, impact, fatigue.Part spheroidizing pearlite tissue can also reduce hot rolled plate competency, improve elongation percentage, have Help cold rolling.
After hot rolling pickling and cold-rolling of the present invention, rolled using reversable mill.
Hot rolling is through 10%-30% hydrochloric acid solution pickling, abundant cleared scale on surface, then with 0.2-1mm overall reduction Cold rolling improves surface hardness, without annealing, rolls hard state delivery, steel plate group is woven to lamellar pearlite+ferrite+nodularization pearl The line and staff control of body of light, 1-2 grades of Oxygen potential, shred layer pearlite accounts for 40%-70%.Oxygen potential is superior to 2 grades, shred layer pearl Body of light volume is less than 40%, and steel plate hardness is reduced to 85HRB, and press formability is poor, and lumber recovery is low.Oxygen potential is lower than 1 grade, lamella Pearlite volume is more than 70%, and steel plate hardness is high, and plasticity is poor, and steel plate hardness is higher than 95HRB, and punch forming is difficult, mold loss Seriously.
The beneficial effects of the present invention are: the steel plate of application technical solution disclosed by the invention production is organized as nodularization pearl Body of light+ferrite+fine pearlite line and staff control, 1-2 grades of Oxygen potential, shred layer pearlite accounts for 40%-70%.Steel plate is hard Degree is 85-95HRB, any surface finish, and carrier bar punching press lumber recovery processed is up to 98% or more, surface of steel plate decarburized layer deepness≤ 0.02mm, for hardness uniformly and up to 45HRC or more, the performances such as fatigue, impact are also all satisfied requirement, corrosion resistance after heat treatment It significantly improves, corrosion-resistant rate is substantially reduced, and average corrosion rate is less than 25g/m2·h。
Detailed description of the invention
Fig. 1 is that hard state tissue is rolled in 1 cold rolling of the embodiment of the present invention.
Fig. 2 is 1 hot rolled plate micro-organization chart of the embodiment of the present invention.
Specific embodiment
Below by embodiment, the present invention is further illustrated.
The embodiment of the present invention is smelted, is refined, continuous casting, continuous casting, rolling, cold rolling according to the component proportion of technical solution.
(1) smelting process: LF+RH duplex refining treatment is used, it is desirable that processing time 40min or more, so as to nonmetallic folder Sundries floats sufficiently, guarantees steel quality, improves the fatigue behaviour of finished product carrier bar；
(2) it rolls:
A) hot delivery and hot charging after continuous casting；Hot delivery and hot charging after continuous casting；Using hot rolling technology, high pressure water is all made of before smart roughing and is removed Squama, high pressure water operating pressure are greater than 200MPa, guarantee finished steel plate surface quality；1050 DEG C~1150 DEG C of roughing start rolling temperature, First rolling pass reduction is greater than 30%, and 1000 DEG C -1100 DEG C of finish rolling start rolling temperature, finishing temperature control is at 800 DEG C~920 DEG C；
B) cooling after rolling: to use uniform cooling technique, be cooled to 700 DEG C~780 with 10 DEG C/S~50 DEG C/S cooling rate It DEG C is batched, is utilized the slow cooling of coil of strip waste heat 72 hours or more.
Cold rolling: using pickling and cold-rolling, and hot rolled coil is after 10%-30%HCl solution pickling, cold rolling overall reduction 0.2-1mm, Strip is coiled into after oiling.
In the continuous casting process, molten steel is produced using continuous casting mode, is stirred in continuous casting process using slighter compress and electromagnetism Mix technique.
Further, bringing-up section weak oxide atmosphere, soaking zone reduction in heating furnace before (a) hot rolling in the step (2) Property atmosphere, 1150 DEG C~1220 DEG C of bringing-up section furnace temperature, air coefficient be 1.0~1.20,1100 DEG C~1200 DEG C of soaking zone furnace temperature, Air coefficient is 0.80~1.00；Slab stops 1.5~3h of total time in furnace, and 1100 DEG C~1150 DEG C of slab tapping temperature.
The ingredient of steel of the embodiment of the present invention and comparative example steel is shown in Table 1.The main work of steel of the embodiment of the present invention and comparative example steel Skill parameter is shown in Table 2.The performance of steel of the embodiment of the present invention and comparative example steel is shown in Table 3.
The ingredient (wt%) of 1 steel of the embodiment of the present invention of table and comparative example steel
Number C Si Mn P S Cr Cu Sb Sn Al
1 0.50 0.25 0.91 0.015 0.005 0.47 0.25 0.07 0.1 0.021
2 0.43 0.37 0.52 0.024 0.009 0.24 0.22 0.10 0.08 0.022
3 0.52 0.05 0.81 0.008 0.002 0.18 0.11 0.19 0.12 0.015
4 0.47 0.16 0.75 0.030 0.008 0.45 0.18 0.15 0.02 0.049
5 0.58 0.30 0.60 0.018 0.004 0.27 0.25 0.08 0.05 0.015
6 0.60 0.15 0.95 0.014 0.003 0.21 0.12 0.09 0.07 0.047
7 0.51 0.16 0.88 0.013 0.008 0.29 0.17 0.05 0.09 0.035
8 0.63 0.27 0.82 0.034 0.004 0.42 0.29 0.11 0.06 0.027
9 0.58 0.05 0.79 0.016 0.007 0.36 0.15 0.18 0.18 0.011
10 0.47 0.16 0.65 0.010 0.01 0.25 0.23 0.15 0.16 0.036
11 0.50 0.30 0.87 0.008 0.007 0.37 0.15 0.03 0.14 0.016
12 0.48 0.26 0.82 0.018 0.006 0.21 0.16 0.18 0.09 0.037
13 0.50 0.25 0.91 0.015 0.005 0.47 0.25 0.17 0.18 0.021
14 0.43 0.37 0.52 0.024 0.009 0.24 0.22 0.19 0.16 0.022
15 0.52 0.05 0.81 0.008 0.002 0.18 0.11 0.09 0.02 0.015
16 0.67 0.16 0.75 0.030 0.008 0.45 0.18 0.06 0.12 0.049
17 0.58 0.30 0.60 0.018 0.004 0.27 0.25 0.18 0.15 0.015
18 0.50 0.15 0.95 0.014 0.003 0.21 0.12 0.09 0.17 0.047
19 0.51 0.16 0.88 0.013 0.008 0.29 0.17 0.14 0.19 0.035
20 0.65 0.27 0.82 0.034 0.004 0.42 0.29 0.08 0.06 0.027
21 0.58 0.05 0.79 0.016 0.007 0.36 0.15 0.08 0.08 0.012
22 0.47 0.16 0.65 0.010 0.01 0.25 0.23 0.05 0.06 0.036
23 0.50 0.30 0.87 0.008 0.007 0.37 0.15 0.10 0.04 0.026
24 0.68 0.26 0.82 0.018 0.006 0.21 0.16 0.09 0.02 0.037
45Mn hot rolled plate 0.42 0.2 0.75 0.02 0.010 - - - - -
Note: surplus is Fe and inevitable trace impurity
The main technologic parameters of table 2 steel of the embodiment of the present invention and comparative example steel
The performance of table 3 steel of the embodiment of the present invention and comparative example steel
From the foregoing, it will be observed that steel plate hardness of the embodiment of the present invention is 85-95HRB, any surface finish, carrier bar punching press lumber recovery processed is up to 98% or more, surface of steel plate delamination depth≤0.02mm, hardness is uniform after heat treatment and reaches 45HRC or more, the property such as fatigue, impact It can be also all satisfied requirement, corrosion resistance significantly improves, and corrosion-resistant rate is substantially reduced, and average corrosion rate is less than 25g/m2· h。
In order to state the present invention, explanation appropriately and is being sufficiently carried out to the present invention by embodiment among the above, it is above Embodiment is merely to illustrate the present invention, and not limitation of the present invention, those of ordinary skill in related technical field, not In the case where being detached from the spirit and scope of the present invention, it can also make a variety of changes and modification, made any modification are equally replaced It changes, improve, should all be included in the protection scope of the present invention, scope of patent protection of the invention should be limited by claim It is fixed.

Claims (5)

1. a kind of corrosion-resistant carrier bar steel, which is characterized in that the ingredient of the steel plate is as follows by weight percentage: C:0.40%~ 0.70%, Si:0.1%~0.40%, Mn:0.5.0%~1.0%, Cr:0.1%~0.5%, Cu:0.1%~0.5%, Sb: 0.03%~0.2%, Al:0.015%~0.050%, Sn:0.02%~0.3%, impurity element P≤0.035%, S≤ 0.010%, surplus is Fe and inevitable impurity.
2. a kind of corrosion-resistant carrier bar steel according to claim 1, which is characterized in that the tissue of the steel plate is spheroidizing pearlite + ferrite+shred layer pearlite line and staff control, 1-2 grades of pearlitic spheroidization rate, shred layer pearlite accounts for 40%-70%.
3. a kind of a kind of manufacturing method of corrosion-resistant carrier bar steel of any of claims 1 or 2, including smelting, refining, continuous casting, Rolling, cold rolling, it is characterised in that:
(1) it refines: using LF+RH duplex refining treatment, handle time 40min or more；
(2) it rolls:
A) hot delivery and hot charging after continuous casting；Using hot rolling technology, it is coarse-fine roll before be all made of high-pressure water descaling, high pressure water operating pressure is greater than 200MPa；1050 DEG C~1150 DEG C of roughing start rolling temperature, first rolling pass reduction is greater than 30%, 1000 DEG C of finish rolling start rolling temperature- 1100 DEG C, finishing temperature control is at 800 DEG C~920 DEG C；
B) cooling after rolling: use uniform cooling technique, with 10 DEG C/S~50 DEG C/S cooling rate be cooled to 700 DEG C~780 DEG C into Row batches, and utilizes the slow cooling of coil of strip waste heat 72 hours or more；
(3) cold rolling: using pickling and cold-rolling, and hot rolled coil is after 10%-30%HCl solution pickling, cold rolling overall reduction 0.2-1mm, Strip is coiled into after oiling.
4. a kind of manufacturing method of corrosion-resistant carrier bar steel according to claim 3, it is characterised in that: the continuous casting process In, molten steel is produced using continuous casting mode, and slighter compress and electromagnetic agitation technique are used in continuous casting process.
5. a kind of manufacturing method of corrosion-resistant carrier bar steel according to claim 3, it is characterised in that: the step (2) A) in, bringing-up section weak oxide atmosphere in heating furnace before hot rolling, soaking zone reducing atmosphere, 1150 DEG C of bringing-up section furnace temperature~ 1220 DEG C, air coefficient is 1.0~1.20, and 1100 DEG C~1200 DEG C of soaking zone furnace temperature, air coefficient is 0.80~1.00；Slab Stop 1.5~3h of total time in furnace, 1100 DEG C~1150 DEG C of slab tapping temperature.
CN201710996936.8A 2017-10-20 2017-10-20 Corrosion-resistant steel for chain plate and manufacturing method thereof Pending CN109695006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710996936.8A CN109695006A (en) 2017-10-20 2017-10-20 Corrosion-resistant steel for chain plate and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710996936.8A CN109695006A (en) 2017-10-20 2017-10-20 Corrosion-resistant steel for chain plate and manufacturing method thereof

Publications (1)

Publication Number Publication Date
CN109695006A true CN109695006A (en) 2019-04-30

Family

ID=66226101

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710996936.8A Pending CN109695006A (en) 2017-10-20 2017-10-20 Corrosion-resistant steel for chain plate and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN109695006A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110499479A (en) * 2019-09-02 2019-11-26 鞍钢股份有限公司 Steel with excellent electroplating performance for high-strength bolting belt and manufacturing method thereof
CN110499447A (en) * 2019-09-02 2019-11-26 鞍钢股份有限公司 Steel for electroplating fastening belt buckle and manufacturing method thereof
CN110616361A (en) * 2019-11-06 2019-12-27 湖南华菱湘潭钢铁有限公司 Production method of steel for annealing-free nitriding
CN110904385A (en) * 2019-12-06 2020-03-24 马鞍山钢铁股份有限公司 Low-cost cold-rolled steel plate for chain and production method thereof
CN111206179A (en) * 2020-02-28 2020-05-29 鞍钢股份有限公司 Steel for high-fatigue-life electroplated plate hook and manufacturing method thereof
CN111378900A (en) * 2020-04-30 2020-07-07 鞍钢股份有限公司 Wear-resistant and corrosion-resistant steel for chain plate and manufacturing method thereof
CN111411311A (en) * 2020-04-30 2020-07-14 鞍钢股份有限公司 Steel for die casting corrosion-resistant chain plate and manufacturing method thereof
CN111534743A (en) * 2020-04-30 2020-08-14 鞍钢股份有限公司 High-wear-resistance cold-rolled chain plate steel and manufacturing method thereof
CN111534745A (en) * 2020-04-30 2020-08-14 鞍钢股份有限公司 Impact-resistant chain plate steel and manufacturing method thereof
CN111534744A (en) * 2020-04-30 2020-08-14 鞍钢股份有限公司 Steel for die casting wear-resistant chain plate and manufacturing method thereof
CN111549274A (en) * 2020-04-30 2020-08-18 鞍钢股份有限公司 Wear-resistant Nb-containing chain plate hot-rolled steel strip and manufacturing method thereof
CN111575578A (en) * 2020-04-30 2020-08-25 鞍钢股份有限公司 Hot-rolled chain plate steel strip with excellent wear resistance and manufacturing method thereof
CN112226688A (en) * 2020-09-30 2021-01-15 鞍钢股份有限公司 Corrosion-resistant and biological-adhesion-resistant EH690 steel plate and manufacturing method thereof
CN112899571A (en) * 2021-01-19 2021-06-04 山东钢铁股份有限公司 Fatigue-resistant corrosion-resistant round steel for forging and pressing and preparation method thereof
CN113584376A (en) * 2021-06-21 2021-11-02 首钢集团有限公司 800 MPa-grade weathering steel and preparation method thereof, and fastener and preparation method thereof
CN114686753A (en) * 2022-04-20 2022-07-01 张家港宏昌钢板有限公司 Method for producing 40Mn hot-rolled steel, and use thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102712978A (en) * 2010-01-22 2012-10-03 杰富意钢铁株式会社 High-strength hot-dip galvanized steel sheet with excellent processability and spot weldability and process for producing same
CN102712977A (en) * 2010-01-22 2012-10-03 杰富意钢铁株式会社 High-strength hot-dip galvanized steel sheet with excellent processability and impact resistance and process for producing same
CN103210098A (en) * 2010-09-16 2013-07-17 Posco公司 High-carbon hot-rolled steel sheet, cold-rolled steel sheet and a production method therefor
KR20160074350A (en) * 2014-12-18 2016-06-28 주식회사 포스코 Oriented electrical steel sheet and method for manufacturing the same
CN106319368A (en) * 2015-06-16 2017-01-11 鞍钢股份有限公司 Economical thin chain plate and manufacturing method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102712978A (en) * 2010-01-22 2012-10-03 杰富意钢铁株式会社 High-strength hot-dip galvanized steel sheet with excellent processability and spot weldability and process for producing same
CN102712977A (en) * 2010-01-22 2012-10-03 杰富意钢铁株式会社 High-strength hot-dip galvanized steel sheet with excellent processability and impact resistance and process for producing same
CN103210098A (en) * 2010-09-16 2013-07-17 Posco公司 High-carbon hot-rolled steel sheet, cold-rolled steel sheet and a production method therefor
KR20160074350A (en) * 2014-12-18 2016-06-28 주식회사 포스코 Oriented electrical steel sheet and method for manufacturing the same
CN106319368A (en) * 2015-06-16 2017-01-11 鞍钢股份有限公司 Economical thin chain plate and manufacturing method thereof

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110499479A (en) * 2019-09-02 2019-11-26 鞍钢股份有限公司 Steel with excellent electroplating performance for high-strength bolting belt and manufacturing method thereof
CN110499447A (en) * 2019-09-02 2019-11-26 鞍钢股份有限公司 Steel for electroplating fastening belt buckle and manufacturing method thereof
CN110616361A (en) * 2019-11-06 2019-12-27 湖南华菱湘潭钢铁有限公司 Production method of steel for annealing-free nitriding
CN110904385A (en) * 2019-12-06 2020-03-24 马鞍山钢铁股份有限公司 Low-cost cold-rolled steel plate for chain and production method thereof
CN110904385B (en) * 2019-12-06 2021-08-03 马鞍山钢铁股份有限公司 Low-cost cold-rolled steel plate for chain and production method thereof
CN111206179A (en) * 2020-02-28 2020-05-29 鞍钢股份有限公司 Steel for high-fatigue-life electroplated plate hook and manufacturing method thereof
CN111549274A (en) * 2020-04-30 2020-08-18 鞍钢股份有限公司 Wear-resistant Nb-containing chain plate hot-rolled steel strip and manufacturing method thereof
CN111534743A (en) * 2020-04-30 2020-08-14 鞍钢股份有限公司 High-wear-resistance cold-rolled chain plate steel and manufacturing method thereof
CN111534745A (en) * 2020-04-30 2020-08-14 鞍钢股份有限公司 Impact-resistant chain plate steel and manufacturing method thereof
CN111534744A (en) * 2020-04-30 2020-08-14 鞍钢股份有限公司 Steel for die casting wear-resistant chain plate and manufacturing method thereof
CN111411311A (en) * 2020-04-30 2020-07-14 鞍钢股份有限公司 Steel for die casting corrosion-resistant chain plate and manufacturing method thereof
CN111575578A (en) * 2020-04-30 2020-08-25 鞍钢股份有限公司 Hot-rolled chain plate steel strip with excellent wear resistance and manufacturing method thereof
CN111575578B (en) * 2020-04-30 2022-05-20 鞍钢股份有限公司 Hot-rolled chain plate steel strip with excellent wear resistance and manufacturing method thereof
CN111378900B (en) * 2020-04-30 2022-05-20 鞍钢股份有限公司 Steel for wear-resistant and corrosion-resistant chain plate and manufacturing method thereof
CN111378900A (en) * 2020-04-30 2020-07-07 鞍钢股份有限公司 Wear-resistant and corrosion-resistant steel for chain plate and manufacturing method thereof
CN111534743B (en) * 2020-04-30 2022-03-22 鞍钢股份有限公司 High-wear-resistance cold-rolled chain plate steel and manufacturing method thereof
CN112226688B (en) * 2020-09-30 2021-12-24 鞍钢股份有限公司 Corrosion-resistant and biological-adhesion-resistant EH690 steel plate and manufacturing method thereof
CN112226688A (en) * 2020-09-30 2021-01-15 鞍钢股份有限公司 Corrosion-resistant and biological-adhesion-resistant EH690 steel plate and manufacturing method thereof
CN112899571A (en) * 2021-01-19 2021-06-04 山东钢铁股份有限公司 Fatigue-resistant corrosion-resistant round steel for forging and pressing and preparation method thereof
CN113584376A (en) * 2021-06-21 2021-11-02 首钢集团有限公司 800 MPa-grade weathering steel and preparation method thereof, and fastener and preparation method thereof
CN113584376B (en) * 2021-06-21 2022-06-21 首钢集团有限公司 800 MPa-grade weathering steel and preparation method thereof, and fastener and preparation method thereof
CN114686753A (en) * 2022-04-20 2022-07-01 张家港宏昌钢板有限公司 Method for producing 40Mn hot-rolled steel, and use thereof

Similar Documents

Publication Publication Date Title
CN109695006A (en) Corrosion-resistant steel for chain plate and manufacturing method thereof
CN106319368B (en) Economical thin chain plate and manufacturing method thereof
CN109280847B (en) High-carbon alloy chain tool steel and manufacturing method thereof
CN111254354B (en) V microalloyed high-strength high-toughness bainite non-quenched and tempered steel and forging and cooling control process and production process thereof
CN109628846B (en) 1300 MPa-grade ultrahigh-strength cold-rolled steel plate for automobiles and production method thereof
CN106319378B (en) Steel for large-diameter thin saw blade matrix and manufacturing method thereof
CN111041382A (en) 1800 MPa-grade non-coating hot forming steel with low high-temperature friction coefficient and preparation method thereof
CN113106339B (en) Preparation method of ultrahigh-strength high-plasticity high-temperature-oxidation-resistant hot stamping formed steel
CN101768698A (en) Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof
CN112430787B (en) Low-yield-ratio high-strength cold-rolled hot-dip galvanized steel plate and manufacturing method thereof
CN106256918A (en) The Automobile flywheel cold-strip steel of a kind of precision stamping processing and manufacture method thereof
CN112430771B (en) Cold-rolled steel plate for precision stamping high-speed cutting chain saw blade and manufacturing method thereof
CN111321341A (en) 1500 MPa-grade non-coating hot forming steel with low high-temperature friction coefficient and preparation method thereof
CN105274431B (en) Hot-rolled strip steel rake sheet suitable for water quenching and manufacturing method thereof
CN105296866B (en) Steel for blade, production method and blade treatment method
CN113699440A (en) Production process method for reducing net grade of GCr15 bearing steel bar carbide
CN111534760B (en) Hot-rolled hot-formed steel and preparation method thereof
CN116657054A (en) Rare earth element-containing high-temperature oxidation resistant hot stamping steel and hot stamping forming process
CN110551949B (en) Cold-rolled steel sheet for precisely stamping automobile safety belt buckle and manufacturing method thereof
CN116900178A (en) Advanced hot stamping forming method of high Cr-Si alloying plating-free hot forming steel
CN107385348A (en) A kind of precision stamping cold-rolled steel sheet and its manufacture method
CN113151651B (en) Production method of low-temperature annealed ultra-deep drawn cold-rolled steel plate and cold-rolled steel plate
CN111979470A (en) Production method of ultrahigh-strength cold-rolled martensite steel plate with good bending property
CN110964985A (en) Molybdenum-free low-alloy wear-resistant steel plate and production method thereof
CN105714197A (en) High-strength and easy-to-stamp-form cold-rolled steel plate and production method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190430