CN104357758B - A kind of ultra-hard particles enhancement type martensite wear-resistant steel plate and manufacture method thereof - Google Patents
A kind of ultra-hard particles enhancement type martensite wear-resistant steel plate and manufacture method thereof Download PDFInfo
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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
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- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- 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
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- 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
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Abstract
A kind of ultra-hard particles enhancement type martensite wear-resistant steel plate and manufacture method thereof, belong to technical field of alloy steel.The chemical constitution of this wear-resisting steel plate by weight percentage composition is: 0.20-0.40; Mn:0.50-1.00; Si:0.30-0.60; Cr:0.50-0.80; Ni:0.40-0.60; Mo:0.30-0.40; Ti:0.40-0.80; Cu:0.30-0.50; B:0.0005-0.003; S≤0.005; P≤0.015; Surplus is Fe and inevitable impurity element.The manufacture method of this steel grade is: converter or electrosmelting, external refining, sheet billet continuous casting or die casting, heating, rolling, cooling, thermal treatment.According to mentioned component and technique, stocking can obtain the TiC precipitated phase that volume fraction is about 0.5-1.5%, and precipitate median size is about 1 μm; Steel plate hardness HB400-500, wear resistance reaches more than 1.5 times of Hardox450, and processing characteristics and welding property excellent, meet relevant device manufacture requirements.
Description
Technical field
The invention belongs to technical field of alloy steel, in particular, provide a kind of ultra-hard particles enhancement type martensite wear-resistant steel plate and manufacture method thereof, is a kind of ultra-hard particles enhancement type martensite wear resistant steel with superior abrasion resistance and processing characteristics.
Background technology
It is severe especially that wear resisting steel is widely used in working conditions, require on the engineering goods such as the engineering of high strength, high-wear resistance, mining, building, agricultural, manufacture of cement, harbour, electric power and metallurgy, as scraper conveyer, elevating conveyor, excavator, wagon tremie and various mining machineries etc.The tissue of tradition low-alloy wear-resistant steel selects single-phase martensite usually, and the main method improving its wear resistance improves the hardness of carbon content and quenched martensite in steel, develops Brinell hardness HB360 ~ 600 different stage wear resisting steel accordingly.But along with the increase of hardness, the processibility of steel and weldability, by severe exacerbation, are difficult to meet equipment manufacturing related request.Under the prerequisite not improving hardness, how significantly to improve the wear resistance of steel, become current metallurgy and a wear-resisting industry gordian technique difficult problem urgently to be resolved hurrily.
Summary of the invention
The object of the present invention is to provide a kind of ultra-hard particles enhancement type martensite wear-resistant steel plate and manufacture method thereof, solve existing high hardness wear-resisting steel welding property and poor processability, be difficult to meet a difficult problem for device fabrication requirement, the invention provides 1.5 times that a kind of steel plate wear resistance can reach same rigidity conventional martensitic wear resisting steel.Ultra-hard particles selects the TiC precipitated phase of hardness HV >=3000, and precipitated phase mean sizes is about 1 μm, and volume fraction is 0.5-1.5%.These superhard TiC particles improve wear resistance principle: stop passing through of abrasive wear ditch dug with a plow, or crushing grain, passivation abrasive particle wedge angle, significantly alleviate the wear weight loss of matrix.
Wear-resisting steel plate chemical constitution of the present invention by weight percentage composition (wt.%) is C:0.20-0.40; Mn:0.50-1.00; Si:0.30-0.60; Cr:0.50-0.80; Ni:0.40-0.60; Mo:0.30-0.40; Ti:0.40-0.80; Cu:0.30-0.50; B:0.0005-0.003; S≤0.005; P≤0.015; Surplus is Fe and inevitable impurity element.
The effect of each element of the present invention and proportioning are according to as follows:
Carbon: the hardening capacity improving steel, has strong solution strengthening effect, significantly improve intensity and the hardness of martensitic steel; The carbon of proper content is combined with titanium and forms micron order TiC particle, significantly can improve wear resistance.It is 0.20-0.40% that steel of the present invention controls carbon content, carbon content, lower than 0.20wt.%, be difficult to the TiC particle forming enough volume fractions, and the hardening capacity of steel and hardness is all lower, carbon content is higher than 0.40wt.%, then the toughness plasticity of steel, processibility and weldability worsen.
Silicon: one of deoxidant element in steel, has certain solution strengthening effect simultaneously, but excessive silicon to the toughness of steel and welding property unfavorable.Comprehensive above-mentioned consideration, steel silicone content scope of the present invention is 0.30-0.60wt.%.
Manganese: the hardening capacity significantly improving steel, has certain solution strengthening effect simultaneously.But when Fe content is higher, its in strand segregation tendency increase, steel belt roof bolt fragility susceptibility increase, unfavorable to welding property in addition.Steel Fe content scope of the present invention is 0.50-1.00wt.%.
Titanium: as carbide, is combined the ultra-hard particles TiC forming hardness HV and be greater than 3000, significantly improves the wear resistance of steel with carbon.The present invention controls titanium content 0.40-0.80wt.%, and the TiC particle volume fraction formed is about 0.5-1.5%, and mean particle size is about 1 μm.Too much TiC particle worsens plasticity and the toughness of material, and very few particle effectively can not improve the wear resistance of material.
Adopt carbide Ti, content effectively can improve the wear resistance of material in 0.40-0.80% scope, and materials processing simultaneously and excellent weldability, can meet relevant device manufacture requirements.
Molybdenum: the hardening capacity significantly improving steel, reduces temper brittleness, improves the resistance for delayed fracture of steel.Meanwhile, molybdenum can dissolve in TiC and form (TiMo) C, improves the volume fraction of TiC particle.It is 0.30-0.40wt.% that the present invention controls molybdenum content scope.
Chromium: the hardening capacity and the anti-corrosion wear performance that improve steel, but too high chromium reduces processibility and weldability, and it is 0.50-0.80wt.% that the present invention controls chromium content range.
Nickel: the hardening capacity improving steel, significantly improves low-temperature flexibility, improves the corrosion resisting property of steel.It is 0.40-0.60wt.% that the present invention controls nickel content range.
Copper: the hardening capacity and the corrosion resistance nature that improve steel, can significantly improve wear resistance under corrosive wear environment.Steel control the content of copper scope of the present invention is 0.30-0.50wt.%.
Boron: strong segregation is in austenite grain boundary and other lattice defect place, add trace B and can significantly improve hardening capacity, but Boron contents is saturated more than effect above-mentioned after 0.003wt.%, but also may be formed various to hot workability and the disadvantageous boracic precipitated phase of toughness, therefore Boron contents should control within the scope of 0.0005-0.003wt.%.
Phosphorus, sulphur are as the toughness plasticity of impurity element grievous injury steel, and content controls respectively at S≤0.005wt.%, P≤0.015wt.%.
The manufacture method of wear-resisting steel plate of the present invention, technique comprises successively: converter or electrosmelting, external refining, sheet billet continuous casting (die casting), heating, controlled rolling, controlled cooling model, thermal treatment; The technical parameter controlled in process is as follows:
Heat in process furnace after continuously cast bloom or ingot formation, Heating temperature is 1050-1220 DEG C, and the time is 1-5 hour.Heating temperature is higher than 1220 DEG C, and the TiC particle formed in castingprocesses can be partially dissolved in austenite, reduces wear resistance; Heating temperature is lower than 1050 DEG C, and steel plate deformed drag is excessive, rolling difficulty.
Adopt plate mill rolling or hot continuous rolling.Plate mill rolling technology is: roughing rolling 3-8 passage, finish rolling rolling 5-14 passage, and finishing temperature is 850-950 DEG C, rolls rear air cooling or accelerating cooling, and final cooling temperature is 300-700 DEG C.In process air cooler or after accelerating cooling, steel plate is aligned.Hot continuous rolling process is: roughing rolling 3-8 passage, is rolled into the intermediate blank of 20-60mm thickness by strand, then through 6 or 7 frame hot continuous rollings, finishing temperature is 850-950 DEG C, coils into coil of strip after rolling after section cooling, and coiling temperature is 300-700 DEG C.Coil of strip is opened after putting down and cut into steel plate, and align on straightener.
Steel plate hot process, comprises Quench and temper.
Quenching temperature is 860 ~ 940 DEG C, and heat-up time is 5-60 minute, shrend after steel plate heating.Too high Heating temperature makes AUSTENITE GRAIN COARSENING, reduces the toughness plasticity of steel; Too low Heating temperature then obviously reduces the hardening capacity of steel and the centre hardness of thick steel plates, is unfavorable for wear resistance.
Tempering temperature is 100-250 DEG C, soaking time 10-120 minute, air cooling after insulation.
By above-mentioned technique, the matrix of this wear resisting steel is lath martensite, and comprise the TiC precipitated phase that volume fraction is about 0.5-1.5% in matrix, precipitate particle size is on average about 1um (as depicted in figs. 1 and 2) simultaneously.The yield strength of material is greater than 1000MPa, and tensile strength is greater than 1300MPa, and unit elongation is greater than 8%, and room temperature impact merit is greater than 20J, hardness HB400-500, machinability and welding property excellent, device fabrication requirement can be met.The Abrasive Resistance of Stubble-cleaning of material can reach more than 1.5 times of Hardox450.
The present invention breaks through conventional martensitic wear resisting steel improves merely wear resistance technical thought by improving hardness, under the basic permanence condition of hardness, wear resistance is improved by introducing the superhard TiC particle of certain volume mark micron order, efficiently solve the conspicuous contradiction of conventional martensitic wear resisting steel wear resistance and processibility and weldability, have broad application prospects.
Accompanying drawing explanation
Fig. 1 is the optics microtexture of ultra-hard particles enhancement type martensite wear resistant steel of the present invention, and in figure, white particles is TiC.
Fig. 2 is the TiC particles size distribution of ultra-hard particles enhancement type martensite wear resistant steel of the present invention.
Embodiment:
Embodiment 1: chemical constitution of the present invention by weight percentage composition is C:0.33; Si:0.43; Mn:0.54; Cr:0.82; Ni:0.55; Mo:0.31; Ti:0.61; Cu:0.32; B:0.0016; S:0.005; P:0.005; Surplus is Fe and inevitable impurity.Manufacturing process: converter smelting, LF refining, RH refining, sheet billet continuous casting, adopt plate mill rolling, process furnace Heating temperature 1200 DEG C, finish rolling finishing temperature 860 DEG C, rolling thickness 30mm, rolls rear air cooling.Thermal treatment process: austenitizing temperature 880 DEG C, soaking time 0.5 hour, shrend is to room temperature, and then 200 DEG C of tempering, 1 hour air cooling is to room temperature.
Embodiment 2: chemical constitution of the present invention by weight percentage composition is C:0.31; Si:0.48; Mn:0.92; Cr:0.91; Ni:0.51; Mo:0.32, Ti, 0.58, Cu:0.35; B:0.0020; S:0.005; P:0.015; Surplus is Fe and inevitable impurity.Manufacturing process: converter smelting, LF refining, sheet billet continuous casting, adopt plate mill rolling, process furnace Heating temperature 1180 DEG C, finish rolling finishing temperature 900 DEG C, rolling thickness 60mm, rolls rear air cooling.Thermal treatment process: austenitizing temperature 900 DEG C, soaking time 0.5 hour, shrend is to room temperature, and then 200 DEG C of tempering, 1 hour air cooling is to room temperature.
Embodiment 3: chemical constitution of the present invention by weight percentage composition is C:0.38; Si:0.45; Mn:0.85; Cr:0.82; Ni:0.58; Mo:0.38; Ti:0.58; Cu:0.45; B:0.0018; S:0.005; P:0.015; Surplus is Fe and inevitable impurity.Manufacturing process: converter smelting, LF refining, sheet billet continuous casting, adopt plate mill rolling, process furnace Heating temperature 1200 DEG C, finish rolling finishing temperature 880 DEG C, rolling thickness 40mm, rolls rear air cooling.Thermal treatment process: austenitizing temperature 900 DEG C, soaking time 0.5 hour, shrend is to room temperature, and then 200 DEG C of tempering, 1 hour air cooling is to room temperature.
The embodiment of the present invention and Hardox450 mechanical property and wear resistance detected result as shown in table 1.
Table 1 embodiment of the present invention and Hardox450 mechanical property and wear resistance detected result
Claims (2)
1. a manufacture method for ultra-hard particles enhancement type martensite wear-resistant steel plate, technique comprises successively: converter or electrosmelting, external refining, sheet billet continuous casting, heating, controlled rolling, controlled cooling model, thermal treatment; It is characterized in that: the technical parameter controlled in process is as follows:
(1) heat in process furnace after continuously cast bloom or ingot formation, Heating temperature is 1050-1220 DEG C, and the time is 1-5 hour;
(2) adopt plate mill rolling or hot continuous rolling, plate mill rolling technology is: roughing rolling 3-8 passage, finish rolling rolling 5-14 passage, and finishing temperature is 850-950 DEG C, rolls rear air cooling or accelerating cooling, and final cooling temperature is 300-700 DEG C;
Hot continuous rolling process is: roughing rolling 3-8 passage, is rolled into the intermediate blank of 20-60mm thickness by strand, then through 6 or 7 frame hot continuous rollings, finishing temperature is 850-950 DEG C, coils into coil of strip after rolling after section cooling, and coiling temperature is 300-700 DEG C; Coil of strip is opened after putting down and cut into steel plate, and align on straightener;
(3) steel plate hot process, quenching temperature is 860 ~ 940 DEG C, and heat-up time is 5-60 minute, and after steel plate heating, shrend is to room temperature; Tempering temperature is 100-250 DEG C, soaking time 10-120 minute, air cooling after insulation;
The chemical constitution of described ultra-hard particles enhancement type martensite wear-resistant steel plate by weight percentage composition is: C:0.20-0.40; Mn:0.50-1.00; Si:0.30-0.60; Cr:0.50-0.80; Ni:0.40-0.60; Mo:0.30-0.40; Ti:0.40-0.80; Cu:0.30-0.50; B:0.0005-0.003; S≤0.005; P≤0.015; Surplus is Fe and inevitable impurity element.
2. method according to claim 1, is characterized in that, rolls rear steel plate and obtains the TiC precipitated phase that volume fraction is 0.5-1.5%, precipitated phase particle size average out to 1 μm; Steel plate hardness HB400-500, machinability and welding property meet device fabrication requirement, and the wear resistance of steel plate reaches more than 1.5 times of Hardox450.
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| CN108118257A (en) * | 2017-12-19 | 2018-06-05 | 钢铁研究总院 | TiC particle strengthenings ferrite/bainite base wear-resisting steel plate and manufacturing method |
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| FR2847272B1 (en) * | 2002-11-19 | 2004-12-24 | Usinor | METHOD FOR MANUFACTURING AN ABRASION RESISTANT STEEL SHEET AND OBTAINED SHEET |
| CN1293222C (en) * | 2003-12-11 | 2007-01-03 | 杨军 | Easy cut by flame abrasion-resistant steel in high rigidity, in toughness and preparation method |
| CN102392186B (en) * | 2011-11-07 | 2012-11-07 | 南京钢铁股份有限公司 | Manufacturing method of HB500 grade low-manganese wear-resistant steel plate |
| CN103898420A (en) * | 2012-12-25 | 2014-07-02 | 隆英(金坛)特钢科技有限公司 | Wear-resisting steel plate and manufacturing method thereof |
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| CN108118257A (en) * | 2017-12-19 | 2018-06-05 | 钢铁研究总院 | TiC particle strengthenings ferrite/bainite base wear-resisting steel plate and manufacturing method |
| CN108118257B (en) * | 2017-12-19 | 2020-06-30 | 钢铁研究总院 | TiC particle reinforced ferrite/bainite based wear-resistant steel plate and manufacturing method thereof |
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