CN109161792A - A kind of stud roller case material steel of high pressure roll press - Google Patents

A kind of stud roller case material steel of high pressure roll press Download PDF

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Publication number
CN109161792A
CN109161792A CN201810997432.2A CN201810997432A CN109161792A CN 109161792 A CN109161792 A CN 109161792A CN 201810997432 A CN201810997432 A CN 201810997432A CN 109161792 A CN109161792 A CN 109161792A
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China
Prior art keywords
stud
roller
high pressure
steel
pressure roll
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CN201810997432.2A
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Chinese (zh)
Inventor
杨万彪
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CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
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CERI YINGKOU EQUIPMENT DEVELOPMENT AND MANUFACTURING Co Ltd
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Priority to CN202110854656.XA priority Critical patent/CN113549836A/en
Priority to CN201810997432.2A priority patent/CN109161792A/en
Publication of CN109161792A publication Critical patent/CN109161792A/en
Pending legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C22C38/18—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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C21D2261/00—Machining or cutting being involved

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  • 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 Articles (AREA)

Abstract

The invention discloses a kind of stud roller case material steel of high pressure roll press, the mass percentage of its ingredient are as follows: C 0.40~0.55, Si 0.50%~0.90%, Mn 0.70%~1.00%, P < 0.015%, S < 0.012%, Cr 2.5%~5.0%, Mo 0.4%~0.8%, Ni≤1.0%, V≤0.15%, H≤1.5ppm, O≤45ppm, N≤90ppm, surplus are Fe and inevitable impurity.This material has preferable harden ability, temper resistance, has higher obdurability and contains more high rigidity carbide, can show good wearability, resistance to flaking in use.The problem of being covered using stud roller made of this steel has good wearability and resistance to flaking, can efficiently solve stud peeling, and roller covers surface layer peeling, has the characteristics that long service life, maintenance cost are low.

Description

A kind of stud roller case material steel of high pressure roll press
Technical field
The present invention relates to a kind of roller case material, the stud roller case material steel of especially a kind of high pressure roll press.
Background technique
Roll squeezer is born in the Germany of mid-term the 1980s, is a kind of novel, efficient, energy-efficient milling equipment, it It is to be worked based on bed of material pulverization principle, due to its high pressure, at a slow speed, completely material, the bed of material such as crush at the intrinsic feature, and use extensively In grinding in operation for the industries material such as cement, metallurgy, ore, there is significant efficient, section compared with traditional milling system Energy effect, is known as a quantum jump of comminution engineering.Pervious roll squeezer roll monoblock cast, after equipment Imported From German EMH Company technology, roll-in Machine roller is made of roll shaft and roller set, has saved cost in this way, it is domestic at present mainly using this bushing roller group at.
There are mainly two types of modes, respectively composite casting roll surface and hard alloy stud roll surface for bushing roll surface.Composite casting Roll surface after a period of work, needs built-up welding roll surface to carry out proof strength, increases worker's labour degree, reduces equipment operation efficiency. The application of stud roll surface substantially increases intensity, substantially increases equipment operation efficiency.Country's roll squeezer transformation and upgrade at present, entirely Portion all uses this stud roll surface form.Hard alloy stud roll surface is embedded in by the hard alloy stud of powder metallurgically manufacturing Roller covers a kind of wear-resistant roller surface form on surface, and the defect situation and main disadvantages of stud roll surface are that peeling and roller set edge occur for roller set Nail hole loosens, and then stud falls off.
Mainly based on the medium carbon alloy steel of 34Cr2Ni2Mo material, heat treatment predominantly passes through quenched+work for the country at present Frequency table quench process completion.Although this material roller covers good toughness, meet roller set and require, using effect is poor, mainly have with Lower disadvantage
(1) harden ability of this material is poor, and roller covers outer surface and 30mm depth position hardness is different, and hardness drop is big, and 30mm is deep Roller sleeve column nail hole bottom is softer.Because the stud that stud roller set is inlayed is hard alloy nail, material is stone (100HRC or more), After a stage, roller sleeve column nail hole bottom is soft, and outer surface is hard, causes inside and outside stress inconsistent, between stud and the generation of stud hole Gap generates shaking when work, eventually leads to hard alloy nail roller set surface layer and starts generation peeling.The material roller covers average 2-3 Lower machine is needed within a month to repair exfoliation repair welding.
(2) what this material roller covered wears no resistance, although roll squeezer powder is followed closely mainly by hard alloy, nail and nail Between gap be roller set ontology entirely, so ontology is also subjected to the extruding and grinding of powder, the time, long roller set matrix was ground off by powder, It is locally generated around stud and peels off raw hole, eventually led to stud peeling and scrap, cost greatly increases.
Summary of the invention
The high pressure roller that the technical problem to be solved in the present invention is to provide a kind of harden ability is good, wearability is good, resistance to flaking is good The stud roller case material steel of press.
In order to solve the above technical problems, the technical solution used in the present invention is: the mass percentage of its ingredient are as follows: C 0.40%~0.55%, Si 0.50%~0.90%, Mn 0.70%~1.00%, P < 0.015%, S < 0.012%, Cr 2.5%~ 5.0%, Mo 0.4%~0.8%, Ni≤1.0%, V≤0.15%, H≤1.5ppm, O≤45ppm, N≤90ppm, surplus is for Fe and not Evitable impurity.
The mechanical property of materials of the present invention are as follows: σ b > 950MPa, σ s > 750MPa, δ 5 > 15%, AkU room temperature > 50J, appearance 40~45HRC of surface hardness, hardened depth > 30mm.
The present invention is to guarantee the good harden ability of material, wearability, and resistance to flaking selects reasonable alloying element to match And additional amount, the effect of C and main alloy element are as follows:
C: carbon is to influence hardness of steel, hardness, the principal element of toughness and contact fatigue, with the raising of carbon amounts, after Q-tempering Intensity increases, and fatigue limit improves.C content is divided into the C of solid solution C and undissolved carbide phase, and not molten C compound hardness is very high, has Higher wearability.But excessive V will be so that material fragility increase, reduces MsPoint increases residual austenite content, so carbon amounts It should be selected between 0.40~0.55.
Cr:Cr is most important alloying element in the new material, and in Quench heating, the C element for being solid-solution in matrix can be shown The stability for increasing austenite is write, martensite transformation temperature is reduced, and with the raising of the amount containing Cr, makes CCT curve, pearlite, shellfish Family name's body limited proportionality moves to right, to reduce the critical cooling rate of steel, harden ability and hardenability is improved, to improve the hardness of steel And wearability.
Ni: nickel is non-carbide forming element, it is solid-solution in matrix completely, improves the harden ability of steel, especially multiple with Cr It is more preferable to close function and effect, another effect is to improve toughness.
Mo: molybdenum is carbide, and harden ability can be improved, and effect is weaker compared with Cr, but postpones pearlite and turn No-load voltage ratio Cr is strong, and it is weak to postpone bainite transformation ability ratio Cr.In addition crystal grain can be refined, and temper resistance can be improved, is inhibited back Fiery brittleness.
V: vanadium is strong C compound formation element, exists with the thin particle of independent VC, the hardness and wearability of steel can be improved, V exists Main function is refinement crystal grain in steel, and general control is in 0.05~0.20% range.
The wearability of material of the present invention is improved mainly by the carbide of Mass in steel.With M7C3Based on type carbide, the carbon The hardness of compound reaches 1800HV or so, contains 350000/mm in matrix2Carbide, material contains more M7C3Type High rigidity carbide, so enhancing wearability.
The beneficial effects of adopting the technical scheme are that material of the present invention has preferable harden ability, tempering Stability, have higher obdurability and contain more high rigidity carbide, can show in use good wearability, Resistance to flaking.There is good wearability and resistance to flaking using the set of stud roller made of the present invention, column can be efficiently solved The problem of nail peels off, and roller covers surface layer peeling, has the characteristics that long service life, maintenance cost are low.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
The production method of the stud roller case material steel of this high pressure roll press includes pneumatic steelmaking, LF refining, VD refining, VC casting Ingot, forging and heat treatment after forging process, the process that stud roller set is made includes roughing, Tempering and Quenching, semifinishing, surface Heat treatment and finishing step；The technique of each process is as described below:
(1) pneumatic steelmaking: roller sleeve steel ingot uses pneumatic steelmaking, improves the degree of purity of molten steel, the control of s/p content 0.015% and Below.
(2) LF refining: all chemical analysis controls are in processing range after refining.
(3) VD is refined: VD process control gas content, especially H content control 1.2ppm and following.VC ingot casting ensure that H content after VD, while ensure that the crystalline state of steel ingot.The mass percentage of chemical component are as follows: C 0.40%~0.55%, Si 0.50%~0.90%, Mn 0.70%~1.00%, P < 0.015%, S < 0.012%, Cr 2.5%~5.0%, Mo 0.4%~ 0.8%, Ni≤1.0%, V≤0.15%, H≤1.5ppm, O≤45ppm, N≤90ppm, surplus are Fe and inevitable impurity.
(4) VC ingot casting and forging: forging process uses 80MN press and pressure above press, is forged, is taken using KD method One upsetting one is pulled out, then punching, then uses saddle forging, while guaranteeing that the last one fire has forging ratio, and final forging temperature does not allow to surpass 800 DEG C out.
(5) heat treatment after forging: carrying out heat treatment after forging immediately after forging, heat treatment after forging technique takes a normalizing process And spheroidizing process.
(6) roughing: after normalizing nodularization heat treatment, roller is covered and carries out blank flaw detection and Hardness Surveillance, turn vertical after qualified Lathe carries out roughing.
(7) Tempering and Quenching: detecting a flaw after roughing according to standard, and qualification progress is quenched, quenched whole using resistance furnace Body heating, comes out of the stove and is cooled down after burning thoroughly, cooling cooling using Water-and mist-spraying, be as cold as 100 DEG C and it is following after, into resistance furnace into Row high tempering meets roller set inner hole hardness.
(8) semifinishing: after roller set is come out of the stove, inner hole hardness is detected, semifinishing, half finishing are carried out to outer surface after qualified Outer surface diameter has more 15mm surplus than delivery gauge after work.
(9) Surface heat-treatent: after the semifinishing of outer surface, roller is covered and carries out differential heating, then exterior surface goes out It is cooling that furnace carries out independent Water-and mist-spraying to outer surface.
(10) it finishes: after surface hardening is come out of the stove, Hardness Surveillance being carried out to appearance, turns finishing after qualified.
(11) mechanical performance: the set of roller made of this material and the mechanical performance comparison of the set of roller made of conventional material are shown in Table 1.
Table 1: the mechanical performance comparison of roller set
(12) client's service condition compares: small peeling will generally occur at 3 months or so for the stud roller set of former material, lead It causes hard alloy nail to peel off, causes damages.54 different size roller sets are produced according to above-mentioned material and technique, performance is closed entirely Lattice, using on the machine in March, 2016 for the 8 rollers set produced earliest, have been used continuously more than 2 years so far, have not had so far Once peeling or accident occurred.
Embodiment 1-8: the ingredient of the stud roller case material steel of this high pressure roll press, performance are as described below.
(1) chemical component: each specific chemical component of embodiment is shown in Table 2.
Table 2: the chemical component (wt%) of each embodiment
In table 2, the surplus of chemical component is Fe and inevitable impurity.
(2) it is produced using above-mentioned technique, is shown in Table 3 using the mechanical performance of the stud roller set of this steel production.
Table 3: the mechanical performance of each embodiment stud roller set

Claims (2)

1. a kind of stud roller case material steel of high pressure roll press, which is characterized in that the mass percentage of its ingredient are as follows: C 0.40%~0.55%, Si 0.50%~0.90%, Mn 0.70%~1.00%, P < 0.015%, S < 0.012%, Cr 2.5%~ 5.0%, Mo 0.4%~0.8%, Ni≤1.0%, V≤0.15%, H≤1.5ppm, O≤45ppm, N≤90ppm, surplus is for Fe and not Evitable impurity.
2. the stud roller case material steel of high pressure roll press according to claim 1, which is characterized in that the mechanical property of materials Are as follows: σ b > 950MPa, σ s > 750MPa, δ 5 > 15%, AkU room temperature > 50J, appearance 40~45HRC of surface hardness, hardened depth > 30mm。
CN201810997432.2A 2018-08-29 2018-08-29 A kind of stud roller case material steel of high pressure roll press Pending CN109161792A (en)

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CN202110854656.XA CN113549836A (en) 2018-08-29 2018-08-29 Stud roller sleeve material steel of high-pressure roller press
CN201810997432.2A CN109161792A (en) 2018-08-29 2018-08-29 A kind of stud roller case material steel of high pressure roll press

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CN102041458A (en) * 2009-10-23 2011-05-04 宝山钢铁股份有限公司 Low-alloy abrasion-resistant steel and manufacturing method thereof
CN101974723A (en) * 2010-09-26 2011-02-16 中钢集团邢台机械轧辊有限公司 Impact-resistance double-roller roughing roll and manufacturing method thereof
CN102268601A (en) * 2011-08-09 2011-12-07 上海捷如重工机电设备有限公司 50Cr3MoV steel for back-up roll and heat treatment method for steel
CN102534401A (en) * 2012-01-19 2012-07-04 杨学焦 Wear-resistant alloy steel
CN102634738A (en) * 2012-03-29 2012-08-15 宝山钢铁股份有限公司 Supporting roller with roughness keeping capability and manufacturing method thereof
CN103131955A (en) * 2013-03-01 2013-06-05 河南理工大学 Medium carbon multiple elements low alloy wear resisting steel and production method
CN103409696A (en) * 2013-07-17 2013-11-27 中钢集团邢台机械轧辊有限公司 Hot rolling roller for rolling nonferrous metal, and manufacturing method thereof
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CN104593691A (en) * 2014-12-26 2015-05-06 中钢集团邢台机械轧辊有限公司 Roller sleeve for large forged alloy steel carrying roller and manufacturing method thereof
CN105568135A (en) * 2016-01-15 2016-05-11 中钢集团邢台机械轧辊有限公司 Forged steel rubber and plastic calendar roller and heat treatment method thereof
CN105695873A (en) * 2016-01-27 2016-06-22 中钢集团邢台机械轧辊有限公司 Semi-high speed steel break-down (BD) roller and manufacturing method thereof
CN106222569A (en) * 2016-08-01 2016-12-14 宁波达尔机械科技有限公司 A kind of self-lubrication alloy high rigidity bearing

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