CN110512145A - A kind of rare earth NM360 Wide and Heavy Plates and its production method - Google Patents

A kind of rare earth NM360 Wide and Heavy Plates and its production method Download PDF

Info

Publication number
CN110512145A
CN110512145A CN201910880525.1A CN201910880525A CN110512145A CN 110512145 A CN110512145 A CN 110512145A CN 201910880525 A CN201910880525 A CN 201910880525A CN 110512145 A CN110512145 A CN 110512145A
Authority
CN
China
Prior art keywords
wide
heavy plates
rare earth
temperature
heavy
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
CN201910880525.1A
Other languages
Chinese (zh)
Inventor
高军
屈文胜
薛越
李�浩
吴明明
孙长玉
张军
白永强
吴鹏飞
隋鑫
柳婕
朱晓丽
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.)
Baotou Iron and Steel Group Co Ltd
Original Assignee
Baotou Iron and Steel Group 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 Baotou Iron and Steel Group Co Ltd filed Critical Baotou Iron and Steel Group Co Ltd
Priority to CN201910880525.1A priority Critical patent/CN110512145A/en
Publication of CN110512145A publication Critical patent/CN110512145A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • C21D2211/008—Martensite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a kind of rare earth NM360 Wide and Heavy Plates, component comprising following weight percent: C:0.13~0.19%, Ti:0.008~0.015%, Als:0.015~0.030%, B:0.0006~0.0016%, Ca:0.0010~0.0025%, rare earth Re:0.0009~0.0020%.The invention also discloses the production methods of rare earth NM360 Wide and Heavy Plates.Rare earth NM360 Wide and Heavy Plates of the invention and its production method have high intensity, high tenacity, high-ductility, high-wear resistance by the content of optimization each component and rare earth Re, and the Wide and Heavy Plates that optimization process obtains；There is no the defect in terms of the quality such as handling ease cracking, wide market is conducive to the needs for meeting social development.

Description

A kind of rare earth NM360 Wide and Heavy Plates and its production method
Technical field
The present invention relates to metallurgical plate technical field more particularly to a kind of rare earth NM360 Wide and Heavy Plates and its production method.
Background technique
High-performance abrasion-proof steel is mainly used in mining machinery, coal mining machinery, environmental protection machinery, engineering machinery and conveying Machinery etc. wears the critical component at larger position and the more complex heavy heavy construction of applying working condition, it is desirable that has high-intensitive, height The stringent technical characterstics such as toughness, high-ductility, high abrasion, big thickness.
Abrasion-resistant stee disclosed in the prior art includes that patent CN106498295A discloses " high-strength abrasion-proof steel and its manufacturer Method ", ingredient percent are as follows: C:0.22~0.25%, Si:0.21~0.26%, Mn:1.11~1.14%, B:0.0014 ~0.0018%, Ni:0.008~0.011%, Cr:0.16~0.19%, Cu:0.018~0.032%, Mo:0.002~ 0.006%, Nb:0.018~0.022%, P≤0.014%, S≤0.002%, remaining is Fe and inevitable impurity.This is specially Abrasion-resistant stee disclosed in benefit belongs to hot continuous rolling roll bending, using quenching+lonneal process；Patent CN108220806A invention It discloses " a kind of ultra-high-strength/tenacity abrasion-resistant stee and preparation method thereof ", the chemical component of steel is wt%:C:0.25~0.55, Si: 1.50~2.50, Mn:1.50~2.20, Cr:0.3~1.0, Mo:0.2~0.8, Re:0.01~0.1, S < 0.01, P < 0.01, remaining is Fe.Production method is refined through electric arc furnaces or intermediate frequency furnace melting, then through VOD, LF, and continuous casting billet or ingot casting roll System or forging and molding, then through special thermal treatment quenching+average tempering；Patent CN105568165A disclosure of the invention is " a kind of high-strength Tenacity, low-alloy abrasion-resistant stee and preparation method thereof ", high-obdurability low-alloy abrasion-resistant stee, the mass percent of ingredient are as follows: C: 0.40-0.60%, Si:0.60-1.2%, Mn:0.30-1.0%, Cr:0.25-0.35%, Mo:0.15-0.25%, Cu: 0.40-0.60%, Re:0.10-0.15%, P:0-0.025%, S:0-0.025%, remaining is Fe and inevitable impurity. Heat treatment process in preparation method is that liquid is quenched with warm same temperature hardening heat treatment technique, includes: that 1) will cast resulting casting It is heated to 820-860 DEG C of progress austenitizing；2) casting is put into hardening media and quenches；3) it is cooled to cast(ing) surface temperature It is taken out at 200-320 DEG C；4) casting belts temperature is transferred to progress bainite isothermal transformation in 260-330 DEG C of holding furnace, transformation immediately Time 1-2h then takes out air-cooled.
Currently, the critical component of domestic above-mentioned heavy large-scale engineering machinery uses NM### series steel plate, generally existing low temperature punching Hit the defect that poor toughness, center portion wearability are poor, and handling ease cracks；And coal machine and mining machinery steel using amount it is big, for a long time according to Rely import, the defect of industrial chain higher cost；Also, the production method of abrasion-resistant stee in the prior art disclosed above is returned using high temperature Fire, the thermal treatment production process method of quenching+tempering, generally existing complex process, process flow is long, defect at high cost.Cause This, to Optimal Development novel wear resistant steel plate, improve plate quality and optimize wear-resisting steel plate production method there is an urgent need.
Therefore, those skilled in the art is dedicated to developing a kind of rare earth NM360 Wide and Heavy Plates and its production method.
Summary of the invention
In view of the drawbacks described above of the prior art, it is raw that the technical problem to be solved by the present invention is to wear-resisting steel plates in the prior art Production. art is complicated, and process flow is long, at high cost, and that there are low-temperature impact toughness is poor for obtained wear-resisting steel plate, center portion wearability is poor, Defect problem in terms of the quality such as handling ease cracking.
To achieve the above object, the present invention provides a kind of rare earth NM360 Wide and Heavy Plates, it includes following weight percent Component: C:0.13~0.19%, Ti:0.008~0.015%, Als:0.015~0.030%, B:0.0006~ 0.0016%, Ca:0.0010~0.0025%, rare earth Re:0.0009~0.0020%.
Further, the Wide and Heavy Plates, it includes the components of following weight percent: C:0.13~0.19%, Si: 0.20~0.30%, Mn:1.00~1.45%, P≤0.008%, S≤0.005%, Nb:0.015~0.025%, Ti: 0.008~0.015%, Cr:0.40~0.55%, Mo:0.10~0.20%, Als:0.015~0.030%, B:0.0006~ 0.0016%, Ca:0.0010~0.0025%, rare earth Re:0.0009~0.0020%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of C is 0.13%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of C is 0.15%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of C is 0.18%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Si is 0.2%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Si is 0.25%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Si is 0.3%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Mn is 1.0%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Mn is 1.4%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Mn is 1.45%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of P is 0.008%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of P is 0.006%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of P is 0.005%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of S is 0.003%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of S is 0.002%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of S is 0.005%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Nb is 0.015%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Nb is 0.020%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Nb is 0.025%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Ti is 0.008%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Ti is 0.012%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Ti is 0.015%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Cr is 0.4%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Cr is 0.5%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Cr is 0.55%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Mo is 0.1%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Mo is 0.15%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Mo is 0.2%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Als is 0.015%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Als is 0.025%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Als is 0.030%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of B is 0.0008%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of B is 0.0012%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of B is 0.0016%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Ca is 0.0010%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Ca is 0.0015%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of Ca is 0.0025%；
In better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of rare earth Re is 0.0009%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of rare earth Re is 0.0017%；
In another better embodiment of the invention, the Wide and Heavy Plates include that the weight percent of rare earth Re is 0.0020%；
Another aspect of the present invention provides a kind of production method of rare earth NM360 Wide and Heavy Plates, comprising the following steps:
Step 1, using Jing Guo KR desulfurization pretreatment molten iron and high-quality steel scrap as raw material, carry out converter smelting, then It carries out LF refining and RH application of vacuum obtains molten steel；
The molten steel of step 1 is obtained heavy slab by continuous casting working procedure by step 2；
Step 3, the heavy slab for obtaining step 2 heat in heating furnace, 1190 DEG C~1230 DEG C of slab heating temperature, add The hot time is 220~300min, and soaking time is greater than 40min；
Slab after step 3 heating is carried out two-phase control rolling and cooling by step 4；
Step 5 obtains the rare earth NM360 Wide and Heavy Plates using same temperature hardening heat treatment step 4 steel board after cooling:
Further, the production method of the Wide and Heavy Plates, in the step 1, when the RH application of vacuum, terminate it is true Sky carries out first 3~5 minutes addition Rare Earth Lanthanum cerium alloys of multiple pressure；
Further, the production method of the Wide and Heavy Plates, step 1 specific steps are as follows: using pre- by KR desulfurization The molten iron of processing and high-quality steel scrap are as raw material, and bottom-blowing of converter is using whole Argon mode, terminal hit at first time, to reduce because mending Blowing leads to molten steel nitrogen pick-up；The further deoxidation of LF ladle refining furnace, desulfurization, removal be mingled with, adjusting component and temperature, strict control Argon intensity formulates Argon curve according to the principle that early period is strong, mid-term is weak compared with strong, later period, is guaranteeing deoxidation, deep desulfurization, alloy While change, secondary oxidation and the nitrogen pick-up of refining process are reduced；RH process is guaranteeing liquid steel temperature using deep degasification technique is recycled The gas contents such as hydrogen, oxygen, nitrogen are greatly reduced under the premise of stabilization, reduce adverse effect of the pernicious gas to steel, Rare Earth Lanthanum cerium Alloy is added for 3-5 minutes before being vacuum-treated the multiple pressure of end by vacuum chute；Finally obtain the quality percentage of molten steel ingredient Than for C:0.13~0.19%, Si:0.20~0.30%, Mn:1.00~1.45%, P≤0.008%, S≤0.005%, Nb: 0.015~0.025%, Ti:0.008~0.015%, Cr:0.40~0.55%, Mo:0.10~0.20%, Als:0.017~ 0.032%, B:0.0006~0.0016%, Ca:0.0010~0.0025%, rare earth Re:0.0009~0.0020% do not have Ni element is added, surplus is Fe and inevitable impurity；
Further, the production method of the Wide and Heavy Plates, in the step 2, when the continuous casting, permanent pulling rate is 0.9~ 1.1m/min；Low overheat cast temperature is 15~25 DEG C；
Further, the production method of the Wide and Heavy Plates, in the step 2, continuous casting heavy slab with a thickness of 250mm or 300mm；
Further, the production method of the Wide and Heavy Plates, step 2 specific steps are as follows: conticaster is straight arc company Casting machine, using great Bao, middle water-coating port blowing argon, solidification end dynamic soft-reduction, 380A high current electromagnetic agitation and optimization Dynamic secondary cooling technology, by constant temperature, permanent pulling rate technique (0.9~1.1m/min), low overheat is cast (15~25 DEG C), is subtracted The defects of light continuous casting billet center segregation, center porosity, crackle, oscillation mark, production obtains the high-quality plate of thickness 250mm and 300mm Base；
Further, the production method of the Wide and Heavy Plates, in the step 4, the two-phase control rolling, the first stage rolls Start rolling temperature processed is 1170~1230 DEG C, is 880~917 DEG C to temperature；It is≤920 DEG C that second stage, which rolls start rolling temperature, 760~840 DEG C of finishing temperature；
Further, the production method of the Wide and Heavy Plates, in the step 4, cooling temperature is 650~720 DEG C；
Further, the production method of the Wide and Heavy Plates, in the step 5, the isothermal hardening hardening heat is 890 DEG C~910 DEG C, isothermal hardening time inside furnace is 1.5t+10min, and t is steel plate thickness (unit mm)；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 3, the slab 1190 DEG C of heating temperature；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 3 1218 DEG C of slab heating temperature；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 3 1197 DEG C of slab heating temperature；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 3, the slab Heating time is 290min；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 3 Slab heating time is 278min；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 3 Slab heating time is 239min；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 4, two rank Section rolling, it is 1187 DEG C that the first stage, which rolls start rolling temperature,；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 4 Two-phase control rolling, it is 1200 DEG C that the first stage, which rolls start rolling temperature,；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 4 Two-phase control rolling, it is 1225 DEG C that the first stage, which rolls start rolling temperature,；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 4, two rank Section rolling, first stage rolling is 880 DEG C to temperature；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 4 Two-phase control rolling, first stage rolling is 890 DEG C to temperature；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 4 Two-phase control rolling, first stage rolling is 917 DEG C to temperature；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 4, two rank Section rolling, the finishing temperature of second stage rolling are 819 DEG C；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 4 Two-phase control rolling, the finishing temperature of second stage rolling are 810 DEG C；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 4 Two-phase control rolling, the finishing temperature of second stage rolling are 790 DEG C；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 4, cooling temperature It is 689 DEG C；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is cooling in the step 4 Temperature is 700 DEG C；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is cooling in the step 4 Temperature is 720 DEG C；
In better embodiment of the invention, the production method of the Wide and Heavy Plates, in the step 5, the isothermal Quenching hardening heat is 893 DEG C；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 5 Isothermal hardening hardening heat is 909 DEG C；
In another better embodiment of the invention, the production method of the Wide and Heavy Plates is described in the step 5 Isothermal hardening hardening heat is 896 DEG C；
Using above scheme, rare earth NM360 Wide and Heavy Plates and its production method disclosed by the invention have following technology effect Fruit:
(1) rare earth NM360 Wide and Heavy Plates of the invention, compared with NM series wear-resisting steel plate in the prior art, the application is wide Thick steel plate by the content of each component and rare earth Re in optimization Wide and Heavy Plates, and adds Ti, Als, Ca group of proper ratio Point, obtained rare earth NM360 Wide and Heavy Plates have high intensity, high tenacity, high-ductility, high-wear resistance, effectively improve existing The defect of wear-resisting steel plate handling ease cracking；
(2) production method of rare earth NM360 Wide and Heavy Plates of the invention, optimization production method use same temperature hardening heat treatment Method avoids the thermal treatment production process method using quenching+tempering disclosed in the prior art, it is crisp to effectively prevent lonneal Property, the sensibility of steel plate quenching stress cracking is reduced, simplifies and shortens process flow, reduces production cost；
(3) rare earth NM360 Wide and Heavy Plates production method of the invention, by optimize the temperature of production method, the time, etc. works Skill parameter, obtained rare earth NM360 Wide and Heavy Plates metallographic structure are that crystal grain is tiny and uniform martensitic structure, are conducive to improve The low-temperature impact toughness and center portion wearability of steel plate improve product quality；
(4) the obtained rare earth NM360 Wide and Heavy Plates product of the present invention can be widely used for mining machinery, coal mining it is mechanical, Environmental protection machinery, engineering machinery and conveying machinery etc. wear the pass at larger position and the more complex heavy heavy construction of applying working condition Key member etc. needs the preparation of wear parts, is conducive to promote and apply；
In conclusion rare earth NM360 Wide and Heavy Plates of the invention and its production method, pass through optimization each component and rare earth The content of Re, and Ti, Als, Ca component of proper ratio are added, and the Wide and Heavy Plates that optimization process obtains are with high-strength Degree, high tenacity, high-ductility, high-wear resistance；There is no the defect in terms of quality such as handling ease cracking, wide market, Being conducive to the needs for meeting social development, the production method of Wide and Heavy Plates of the invention, process is simple, and it is at low cost, it is suitble to Industrialized production.
Make below with reference to technical effect of the specific embodiment to design of the invention, specific structure and generation further Illustrate, to fully understand the purposes, features and effects of the present invention.
Specific embodiment
The preferred embodiment of the present invention introduced below keeps its technology contents more clear and is easy to understand.The present invention can be with It is emerged from by many various forms of embodiments, protection scope of the present invention is not limited only to the implementation mentioned in text Example.
The preparation of embodiment 1, rare earth NM360 Wide and Heavy Plates
The preparation of the present embodiment Wide and Heavy Plates uses following steps:
Raw material molten iron pass through Deep Desulphurization of Hot Metal, converter top and bottom blowing, ladle argon-blown, LF external refining, RH application of vacuum and Continuous casting working procedure obtains 300mm heavy slab；Heavy slab is heated in heating furnace, 1190 DEG C of slab heating temperature, heating time 290min enters rolling process after keeping the temperature 50min；1187 DEG C of start rolling temperature of first stage rolling, using slab length direction It is broadened, control is 20% or more with respect to more than reduction ratio at least two passages for single pass, when rolled piece is with a thickness of 161mm (2.3 times of finished product thickness) then carries out second stage finish rolling rolling to temperature to 880 DEG C on roller-way, and finishing temperature is 819 DEG C, Finished steel plate is with a thickness of 70mm；After rolling, steel plate enters cooling (ACC) equipment of acceleration, is cooled to the speed of 8 DEG C/s 689 DEG C, quick offline slow cooling；Carry out same temperature hardening heat treatment after ball blast, 893 DEG C of hardening heat, time inside furnace 115min, etc. Surface of steel plate mean temperature is 250 DEG C after temperature quenching, obtains rare earth NM360 Wide and Heavy Plates；
The preparation of embodiment 2, rare earth NM360 Wide and Heavy Plates
The preparation of the present embodiment Wide and Heavy Plates uses following steps:
Smelting, continuous casting embodiment obtain 250mm heavy slab with embodiment 1；Heavy slab is heated in heating furnace, plate 1218 DEG C of base heating temperature, slab heating time 278min, enter rolling process after keeping the temperature 50min；First stage start rolling temperature 1200 DEG C, broadened using slab length direction, single pass with respect to it is more than reduction ratio at least two passages control 20% with On, when rolled piece is with a thickness of 125mm (2.5 times of finished product thickness), to temperature to 890 DEG C on roller-way, then carry out second stage essence Rolling, finishing temperature are 810 DEG C, and finished steel plate is with a thickness of 50mm；After rolling, steel plate enters acceleration cooling (ACC) and sets It is standby, 700 DEG C are cooled to the speed of 8 DEG C/s, quick offline slow cooling；Same temperature hardening heat treatment, hardening heat 909 are carried out after ball blast DEG C, time inside furnace 85min, surface of steel plate mean temperature is 50-300 DEG C after isothermal hardening, obtains the generous steel of rare earth NM360 Plate.
The preparation of embodiment 3, rare earth NM360 Wide and Heavy Plates
The preparation of the present embodiment Wide and Heavy Plates uses following steps:
Smelting, continuous casting embodiment obtain 250mm heavy slab with embodiment 1；Heavy slab is heated in heating furnace, plate 1197 DEG C of base heating temperature, slab heating time 239min, enter rolling process after keeping the temperature 50min；First stage start rolling temperature 1225 DEG C, single pass with respect to more than reduction ratio at least two passages control 20% or more, when (finished product is thick with a thickness of 60mm for rolled piece 3 times of degree) when, to temperature to 917 DEG C on roller-way, second stage finish rolling rolling is then carried out, finishing temperature is 790 DEG C, finished product Steel plate thickness is 30mm；After rolling, steel plate enters cooling (ACC) equipment of acceleration, is cooled to 720 with the speed of 10 DEG C/s DEG C, quick offline slow cooling；Same temperature hardening heat treatment is carried out after ball blast, 896 DEG C of hardening heat, time inside furnace 55min, isothermal is quenched Surface of steel plate mean temperature is 100 DEG C after fire, obtains rare earth NM360 Wide and Heavy Plates.
The Wide and Heavy Plates constituent content that detection Examples 1 to 3 obtains, the results are shown in Table 1.
1 unit of table: %
Embodiment C Si Mn Cr Mo Nb Ti P S Als Ca B Re
1 0.18 0.30 1.45 0.55 0.20 0.025 0.015 0.008 0.005 0.030 0.0025 0.0016 0.0009
2 0.15 0.25 1.40 0.50 0.15 0.020 0.012 0.006 0.002 0.025 0.0015 0.0012 0.0017
3 0.13 0.20 1.00 0.40 0.10 0.015 0.008 0.005 0.003 0.015 0.0010 0.0008 0.0020
From the data in table 1, it can be seen that carbon content is between 0.13~0.19% in the Wide and Heavy Plates that the present embodiment 1~3 obtains, Ti Content is between 0.008~0.015%, and Als content is between 0.015~0.030%, and B content is 0.0006~0.0016% Between, for Ca content between 0.0010~0.0025%, rare earth Re content is free of valuable gold between 0.0009~0.0020% Belong to element Ni.
Conventional mechanical property, series impact, surface and center portion are carried out to the Wide and Heavy Plates that the embodiment of the present invention 1~3 obtains Hardness and bending property are examined, and inspection result is shown in Table 2.
Table 2
From the data in table 2, it can be seen that the Wide and Heavy Plates obtained using the production of present invention method, room temperature tensile value are existed Between 1122~1153Mpa, elongation percentage A50% between 26~31, -20 DEG C of impact of collision work value between 118~167J, Above-mentioned several parameter values are all larger than customer requirement standard figures, show the excellent performance with high intensity, high tenacity, high-ductility；
- 40 DEG C of maximum conditions, -60 DEG C of transverse and longitudinal work value are closer to, and show the transverse and longitudinal of -40 DEG C of maximum conditions, -60 DEG C The uniformity of toughness is higher；
The average hardness of surface and center portion is between 349~383HBW, the especially centre hardness requirement that also reaches NM360 Between 349~359HBW, show that Wide and Heavy Plates through thickness wear-resisting property is preferable；Show the rare earth that the present embodiment obtains The wear-resisting property of NM360 Wide and Heavy Plates is good；
45 ° of processing performances of clod wash are intact, show that Wide and Heavy Plates have the excellent performance that preferably processing is not easy to crack.
In conclusion the process process of the embodiment of the present invention 1~3 is short, at low cost, obtained rare earth NM360 is generous Steel plate has the comprehensive performances such as high intensity, high tenacity, high-ductility, high abrasion, solves that low temperature existing for industry is easy to crack, table The status that layer is wear-resisting, center portion is not wear-resisting, is conducive to the critical component for being widely used in large-scale mine and coal mine, completely desirable cost The higher ad eundem inlet plate of lattice, greatly reduces the manufacturing cost of steel, coal machine and mine industry, has further pushed production The high quality of industry chain develops.
Other technologies scheme of the present invention also has similar beneficial effect.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea Scheme, all should be within the scope of protection determined by the claims.

Claims (8)

1. a kind of rare earth NM360 Wide and Heavy Plates, which is characterized in that the component comprising following weight percent:
C:0.13~0.19%, Ti:0.008~0.015%, Als:0.015~0.030%, B:0.0006~0.0016%, Ca:0.0010~0.0025%, rare earth Re:0.0009~0.0020%.
2. Wide and Heavy Plates as described in claim 1, which is characterized in that the Wide and Heavy Plates, it includes following weight percent Component:
C:0.13~0.19%, Si:0.20~0.30%, Mn:1.00~1.45%, P≤0.008%, S≤0.005%, Nb: 0.015~0.025%, Ti:0.008~0.015%, Cr:0.40~0.55%, Mo:0.10~0.20%, Als:0.015~ 0.030%, B:0.0006~0.0016%, Ca:0.0010~0.0025%, rare earth Re:0.0009~0.0020%.
3. a kind of production method of rare earth NM360, which is characterized in that the specific steps of the production method include:
Step 1, using Jing Guo KR desulfurization pretreatment molten iron and high-quality steel scrap as raw material, carry out converter smelting, then carry out LF refining and RH application of vacuum obtain molten steel；
The molten steel of step 1 is obtained heavy slab by continuous casting working procedure by step 2；
Step 3, the heavy slab for obtaining step 2 heat in heating furnace, and 1190 DEG C~1230 DEG C of slab heating temperature, when heating Between be 220~300min, soaking time be greater than 40min；
Slab after step 3 heating is carried out two-phase control rolling and cooling by step 4；
Step 5 obtains the rare earth NM360 Wide and Heavy Plates using same temperature hardening heat treatment step 4 steel board after cooling.
4. method as claimed in claim 3, which is characterized in that in the step 1,
When the RH application of vacuum, first 3~5 minutes addition Rare Earth Lanthanum cerium alloys of multiple pressure are carried out terminating vacuum.
5. method as claimed in claim 3, which is characterized in that in the step 2,
Permanent pulling rate when the continuous casting is 0.9~1.1m/min；Low overheat cast temperature when the continuous casting is 15~25 DEG C.
6. method as claimed in claim 3, which is characterized in that in the step 4,
The two-phase control rolling, it is 1170~1230 DEG C that the first stage, which rolls start rolling temperature, is 880~917 DEG C to temperature；The It is≤920 DEG C, 760~840 DEG C of finishing temperature that two-stage, which rolls start rolling temperature,；The cooling temperature is 650~720 DEG C.
7. method as claimed in claim 3, which is characterized in that in the step 5,
The isothermal hardening hardening heat is 890 DEG C~910 DEG C, and isothermal hardening time inside furnace is 1.5t+10min, and t is that steel plate is thick Degree.
8. the Wide and Heavy Plates that a kind of any one of claim 3~7 the method produces, which is characterized in that
The Wide and Heavy Plates include the component of following weight percent: C:0.13~0.19%, Si:0.20~0.30%, Mn: 1.00~1.45%, P≤0.008%, S≤0.005%, Nb:0.015~0.025%, Ti:0.008~0.015%, Cr: 0.40~0.55%, Mo:0.10~0.20%, Als:0.015~0.030%, B:0.0006~0.0016%, Ca:0.0010 ~0.0025%, rare earth Re:0.0009~0.0020%；
The Wide and Heavy Plates room temperature tensile value is 1122~1153Mpa, and elongation percentage A50% is 26~31, surface and center portion it is flat Equal hardness is 349~383HBW.
CN201910880525.1A 2019-09-18 2019-09-18 A kind of rare earth NM360 Wide and Heavy Plates and its production method Pending CN110512145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910880525.1A CN110512145A (en) 2019-09-18 2019-09-18 A kind of rare earth NM360 Wide and Heavy Plates and its production method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910880525.1A CN110512145A (en) 2019-09-18 2019-09-18 A kind of rare earth NM360 Wide and Heavy Plates and its production method

Publications (1)

Publication Number Publication Date
CN110512145A true CN110512145A (en) 2019-11-29

Family

ID=68631250

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910880525.1A Pending CN110512145A (en) 2019-09-18 2019-09-18 A kind of rare earth NM360 Wide and Heavy Plates and its production method

Country Status (1)

Country Link
CN (1) CN110512145A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107227426A (en) * 2013-03-28 2017-10-03 杰富意钢铁株式会社 Wear-resisting steel plate and its manufacture method with low-temperature flexibility and resistance to hydrogen embrittlement
CN107354382A (en) * 2013-03-28 2017-11-17 杰富意钢铁株式会社 Wear-resisting steel plate and its manufacture method with low-temperature flexibility
CN108546873A (en) * 2018-04-17 2018-09-18 包头钢铁（集团）有限责任公司 The manufacturing method of high-wearing feature steel plate and high-wearing feature steel plate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107227426A (en) * 2013-03-28 2017-10-03 杰富意钢铁株式会社 Wear-resisting steel plate and its manufacture method with low-temperature flexibility and resistance to hydrogen embrittlement
CN107354382A (en) * 2013-03-28 2017-11-17 杰富意钢铁株式会社 Wear-resisting steel plate and its manufacture method with low-temperature flexibility
CN108546873A (en) * 2018-04-17 2018-09-18 包头钢铁（集团）有限责任公司 The manufacturing method of high-wearing feature steel plate and high-wearing feature steel plate

Similar Documents

Publication Publication Date Title
CN109338035B (en) Steel for wind driven generator gear box bearing and production method thereof
CN105385951B (en) Have the production method of the NM500 wear-resisting steel plates of high hardness high toughness concurrently
CN104046914B (en) A kind of non-hardened and tempered steel and production technique thereof
CN109023119A (en) A kind of abrasion-resistant stee and its manufacturing method with excellent plasticity and toughness
CN107937803A (en) One kind has low-temperature impact toughness wear-resisting steel plate and preparation method thereof
WO2023029282A1 (en) Production method for high-strength steel plate for engineering machinery
CN115612920B (en) Steel for flexible bearing of robot harmonic reducer and production method of steel
CN108660374A (en) A kind of quenching aligning short route wear-resisting steel plate and preparation method thereof
CN110205542A (en) A kind of cold roll tool steel and preparation method thereof
CN109930063B (en) Steel for engineering machinery crawler chassis wheel body and production method thereof
CN114934156A (en) Production method of high-strength and high-toughness hot continuous rolling thin steel plate with Brinell hardness of 450HBW
CN110512151A (en) A kind of rare earth NM450 Wide and Heavy Plates and its production method
CN114134397B (en) Steel suitable for cold extrusion of ball screw and production method thereof
CN114774771B (en) Carburized bearing steel for high-load rolling mill bearing and production method thereof
CN116334483A (en) Reducing roller collar based on steel tube rolling mill and manufacturing method thereof
CN113549830B (en) Medium carbon spheroidized sorbite tool steel with high surface hardness and excellent bending property and production method thereof
CN113265575B (en) Preparation method of extra-thick Mn-Cr series die steel
CN114774774A (en) Round steel for large-diameter low-segregation oil cylinder piston rod and manufacturing method thereof
CN113637900A (en) Production method of thick steel plate for 1100 MPa-level heavy machinery suspension arm
CN110512145A (en) A kind of rare earth NM360 Wide and Heavy Plates and its production method
CN110512147A (en) A kind of rare earth NM400 Wide and Heavy Plates and its production method
CN110512144A (en) A kind of rare earth NM500 Wide and Heavy Plates and its production method
CN113667900A (en) High-hardenability carburizing steel, and manufacturing method and application thereof
CN107312976B (en) Bainite steel rail and production method thereof
CN111876679A (en) Chromium-vanadium hot-rolled steel wire rod and preparation method thereof, and preparation method of steel wire and hand tool

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: 20191129