CN106756565A - HB500 grades of Micro Alloying wear-resisting steel plate and its manufacture method - Google Patents
HB500 grades of Micro Alloying wear-resisting steel plate and its manufacture method Download PDFInfo
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- CN106756565A CN106756565A CN201710021948.9A CN201710021948A CN106756565A CN 106756565 A CN106756565 A CN 106756565A CN 201710021948 A CN201710021948 A CN 201710021948A CN 106756565 A CN106756565 A CN 106756565A
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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
- 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
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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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
The invention discloses a kind of HB500 grades of Micro Alloying wear-resisting steel plate and its manufacture method, it includes heating, rolls and refrigerating work procedure；The weight/mass percentage composition of the steel plate chemical composition is：C 0.24~0.34%, Si 0.20~0.40%, Mn 1.20~1.60%, P≤0.015%, S≤0.01%, Cr 0.2~1.0%, Mo 0.1~0.3%, Ni 0.5~1.2%, Cu 1.0~1.6%, Ti≤0.1%, Nb≤0.1%, V≤0.2%, Al≤0.05%, N≤0.005%, O≤0.003%, B 0.001~0.005%, rare earth 0~0.02%, remaining is iron and inevitable impurity.Carbon content microalloying thought in the use of this steel plate, Cr, Ni, Cu, B etc. are properly added with elements with precipitation strength or so such as the elements and V for improving quenching degree effect, hard phase martensite is obtained under relatively low cooling rate using its quenching degree high, the precipitation of a large amount of carboritrides formed using carbide former, improves hard phase content to increase substantially the anti-wear performance of steel plate.
Description
Technical field
The present invention relates to a kind of abrasion-resistant stee, especially a kind of HB500 grades of Micro Alloying wear-resisting steel plate and its manufacture method.
Background technology
Abrasion-resistant stee is the class ferrous materials for being widely used in all kinds of wear working conditions, such as metallurgy, mine, building, electric power, agriculture
In the every field such as industry, manufacture of cement, railway and military affairs；Specific such as bull-dozer, loading machine, excavator, dumper and various ore deposits
Mountain machinery, grab bucket, stacker-reclaimer, conveying warp architecture etc.；Focusing on components includes excavator bucket teeth, ball grinding machine lining board, disintegrating machine
Jaw plate, rolled mortar wall and tractor shoe etc., can play the wear extent of reduction equipment, extend the effect of its service life.
As plant equipment develops towards high-power, high speed direction, and application of the plant equipment under harsh operating mode,
So that the abrasion of machine components is increasingly severe, not only maintenance cost increase, and even whole plant equipment loss of function,
It is an important development trend to develop high-level abrasion-resistant stee.
Current high-level abrasion-resistant stee is using hardening and tempering process after hot rolling, and the abrasion-resistant stee produced by hardening and tempering process is required to add
Plus alloying element it is few, shortcoming is the increase in technique productions cost, is in addition difficult to control to the template of steel plate, increased production difficult
Degree.If carrying out modifier treatment after being machined to part again, part can be made to deform and it cannot be guaranteed that zero during quenching
The dimensional accuracy and form accuracy of part.
Mode of production introduction on abrasion-resistant stee in the prior art, one kind that such as publication number CN 103243277A are provided
HB400 grades of anti-crack high strength martensitic abrasion-resistant stee and production method, which employs the process route system of press quenching add-back fire
Make HB400 grade wear-resisting steel plates；Remaining as 103266269 A of A, CN of CN 103540729, CN102230135A,
Hardening and tempering process life is employed in the patent application publications such as CN102676922A, CN103114252A, CN102943213A
Abrasion-resistant stee is produced, non-tempering process production hardness has no report for the method for HB500 abrasion-resistant stees.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of HB500 with good template grades of Micro Alloying wear-resisting steel plate；
Present invention also offers a kind of manufacture method of HB500 grades of Micro Alloying wear-resisting steel plate.
In order to solve the above technical problems, the weight/mass percentage composition of chemical composition of the present invention is：C 0.24~0.34%, Si
0.20~0.40%, Mn 1.20~1.60%, P≤0.015%, S≤0.01%, Cr 0.2~1.0%, Mo 0.1~0.3%, Ni
0.5~1.2%, Cu 1.0~1.6%, Ti≤0.1%, Nb≤0.1%, V≤0.2%, Al≤0.05%, N≤0.005%, O≤
0.003%, B 0.001~0.005%, rare earth 0~0.02%, remaining is iron and inevitable impurity.
Steel plate thickness of the present invention is 8~50mm.
The effect of each element is as described below in chemical composition of the invention：
Carbon（C）：The important element of phase transformation strengthening is realized in abrasion-resistant stee, the intensity and hardness of steel can be significantly improved, realized higher
Wearability.But, the carbon of too high amount weakens the toughness and welding performance of steel.Therefore, selection carbon content control 0.24~
In the range of 0.34%.
Silicon（Si）：Effect in steel is mainly solution strengthening.The Si of high level can improve the quenching degree of steel, typically
Si is added to be conducive to improving the intensity and toughness of steel in steel.In addition, Si can increase the austenite quantity for reducing hydrogen diffusion velocity, and
Steel is set to be tempered at a higher temperature.The dislocation that can have both been reduced in steel using alloying with silicon formation carbide-free Bainite is close
Degree, can utilize diffusion velocity of the film of retained austenite reduction hydrogen atom in carbide-free Bainite in steel, so as to change again
The resistance for delayed fracture of kind unimach.Therefore, Si contents are limited to 0.20~0.40% by the present invention.
Manganese（Mn）：Effect in steel is solution strengthening and improves quenching degree, but higher, manganese content is inclined in the segregation of Mn
When higher, have the tendency of to make grain coarsening, and increase the crisp sensitiveness of steel belt roof bolt, and be easily caused in strand occur segregation and
Crackle, reduces the performance of steel plate.Therefore the control of Mn contents is 1.2~1.6%.
Chromium（Cr）：Chromium can reduce critical cooling rate, improve the quenching degree of steel.Chromium can form (Fe, Cr) in steel3C, (Fe, Cr)7C3(Fe, Cr)23C7Etc. various carbide, intensity and hardness are improved.Chromium can be prevented in tempering or slow down carbon
The precipitation of compound and aggregation, can improve steel belt roof bolt stability.Chromium content is controlled in the range of 0.2~1.0%.
Molybdenum（Mo）：Quenching degree can be improved, crystal grain thinning improves intensity and toughness.Molybdenum is present in solid solution phase in steel
In Carbide Phases, therefore, there is solution strengthening and the effect of carbide dispersion-strengthened simultaneously containing molybdenum steel.Molybdenum is to reduce Temper brittleness
Property element, can improve tempering stabilization.Its content is controlled in the range of 0.1~0.3%.
Nickel（Ni）：Critical cooling rate can be reduced, the quenching degree of steel is improved.Nickel in the range of 0.5~1.2%, can and iron
Dissolve each other in any proportion, the low-temperature flexibility of steel is improved by fining ferrite grains, and with substantially reduction Cold Brittleness Transition Temperature
Effect.For high-level and high/low temperature toughness abrasion-resistant stee, nickel is highly beneficial addition element.But too high levels are easily caused
Surface of steel plate oxide skin is difficult to come off, and cost is dramatically increased, therefore need to control its content.
Copper（Cu）：Outstanding role of the copper in steel be improve ordinary low-alloy steel weather-resistant performance, particularly and
When phosphorus is used cooperatively, add copper to improve the intensity and yield ratio of steel, and welding performance is not adversely influenced.Can improve
The stability of austenite in steel, so hardenability and quenching degree can be improved, there is reinforced ferrite, adds in ferrite
Cu, can improve its corrosion resistance in some reductants and improve the toughness of steel.When copper content is more than 0.75%, through solid solution
Ageing strengthening can be produced to act on after treatment and timeliness.Copper to critical-temperature and the influence of quenching degree and its solution strengthening effect with
Nickel is similar, can be used to replace a part of nickel.Its content is controlled in the range of 1.0~1.6%.
Boron（B）：Main Function of the boron in steel is the quenching degree for increasing steel, so that other diluter expensive metals are saved, such as
Nickel, chromium, molybdenum etc., it can replace 1.6% nickel, 0.3% chromium or 0.2% molybdenum, be should be noted that because molybdenum can be prevented for molybdenum with boron or
Temper brittleness is reduced, and boron slightly has the tendency for promoting temper brittleness, so molybdenum can not completely be replaced with boron.Its content is controlled
In the range of 0.001~0.005%.
Rare earth：Rare earth element can improve the plasticity and cutting property of impact of forging rolling steel, especially pronounced particularly in cast steel.It
The creep-resistant property of heat resisting steel, electrothermal alloy and high temperature alloy can also be improved.Rare earth element can also improve the inoxidizability of steel
And corrosion resistance.The effect of inoxidizability exceedes the elements such as silicon, aluminium, titanium.It can improve the mobility of steel, reduce nonmetal inclusion,
Make structure of steel fine and close, pure.Appropriate rare earth element is added in ordinary low-alloy steel, there is good deoxidation desulfuration, can be with
Impact flexibility (particularly low-temperature flexibility) is improved, improves anisotropic properties.Its content is controlled in the range of 0~0.02%.
Vanadium（V）：Vanadium and carbon, nitrogen, oxygen have extremely strong affinity, and corresponding stable compound is formed therewith.Vanadium is main in steel
To exist with the form of carbide.Its Main Function is the tissue and crystal grain for refining steel.The superheated susceptivity of steel is reduced, steel is improved
Intensity and toughness.When solid solution is dissolved in high temperature, increase quenching degree；Conversely, in the presence of such as with carbide morphology, reduction is quenched
Permeability.Vanadium increases the temper resistance of hardened steel, and produces post-curing effect.Its content is controlled in the range of 0~0.2%.
Aluminium（Al）：Aluminium and nitrogen in steel can form the AlN particles of tiny indissoluble, refinement microstructure.Aluminium is not only deoxidier,
The effect for also promoting metastable austenite to be formed.Aluminium can suppress and delay the carbide of overcooling austenite to decompose, and improve toughness.
Its content is controlled in the range of 0~0.05%.
Phosphorus（P）With sulphur（S）：In abrasion-resistant stee, sulphur is harmful element with phosphorus, and their content will be controlled strictly, this hair
Phosphorus content is less than 0.015% in bright involved steel grade, and sulfur content is less than 0.01%.
The inventive method includes heating, rolling and refrigerating work procedure；The weight/mass percentage composition of the steel plate chemical composition is as above
It is described.
Heating process described in the inventive method：Heating and temperature control is at 1200~1250 DEG C.
Rolling process described in the inventive method：1100~1150 DEG C of roughing start rolling temperature, 1000~1050 DEG C of finishing temperature；
The accumulative reduction ratio of finish rolling is not less than 50%, and last three percentage pass reduction is not less than 10%, and 980~1030 DEG C of finish rolling start rolling temperature is whole
Roll 850~950 DEG C of temperature.In the rolling process, steel plate thickness is 8~50mm after finish rolling.
Refrigerating work procedure described in the inventive method：Using air cooling or section cooling；In the section cooling, cold temperature 800 is opened
~900 DEG C, air cooling after being cooled to 400~500 DEG C.Air cooling in the refrigerating work procedure is cooled down using cold bed.
It is using the beneficial effect produced by above-mentioned technical proposal：Carbon content microalloying thought in present invention use,
Cr, Ni, Cu, B etc. are properly added with elements with precipitation strength or so such as the elements and V for improving quenching degree effect, are utilized
Its quenching degree high obtains hard phase martensite under relatively low cooling rate, and a large amount of carbon formed using carbide former are nitrogenized
The precipitation of compound, improves hard phase content to increase substantially the anti-wear performance of steel plate.
The inventive method employs non-tempering process by middle carbon content, microalloying, and the abrasion-resistant stee tool hardness of production reaches
To HB500 ranks, it is ensured that good template, and production difficulty is reduced at a lower cost, be greatly improved production effect
Rate.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is microstructure picture of the invention（10μm）.
Specific embodiment
Embodiment 1：The composition proportion and manufacture method of this HB500 grades of Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this wear-resisting steel plate is by mass percentage：C 0.33%, Si 0.40%, Mn 1.5%, P 0.007%,
S 0.002%, Cr 1.0%, Mo 0.15%, Ni 0.5%, Cu 1.6%, Al 0.04%, B 0.002%, rare earth 0.002%, remaining is
Fe and inevitable impurity；Thickness is 30mm.
By molten steel and the ingot casting of above-mentioned chemical composition is cast into, ingot casting is carried out to roll preceding heating, heating-up temperature is
1230 DEG C, the heat time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature at 1150 DEG C, 1050 DEG C of finishing temperature, slightly
It is 51.5% to roll accumulative reduction ratio；Finish rolling start rolling temperature is 1030 DEG C, and at 950 DEG C, finish rolling adds up reduction ratio 60% to finishing temperature, most
Three percentage pass reductions are not less than 10% afterwards, and the thickness of slab after finish rolling is 30mm.Steel plate after rolling is empty by the way of cold bed cooling
It is cooled to room temperature, you can obtain the HB500 grades of Micro Alloying wear-resisting steel plate.The section Brinell hardness of the present embodiment gained wear-resisting steel plate
It is HB545；Its microstructure picture is shown in Fig. 1, and as shown in Figure 1, its microscopic structure is essentially martensite.
Embodiment 2：The composition proportion and manufacture method of this HB500 grades of Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this wear-resisting steel plate is by mass percentage：C 0.24%, Si 0.30%, Mn 1.3%, P 0.009%,
S 0.002%, Cr 0.95%, Mo 0.1%, Ni 0.6%, Cu 1.6%, Ti 0.1%, Al 0.02%, B 0.003%, rare earth
0.002%, remaining is Fe and inevitable impurity；Thickness is 8mm.
By molten steel and the ingot casting of above-mentioned chemical composition is cast into, ingot casting is carried out to roll preceding heating, heating-up temperature is
1225 DEG C, the heat time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature at 1130 DEG C, 1040 DEG C of finishing temperature, slightly
It is 72.1% to roll accumulative reduction ratio；Finish rolling start rolling temperature is 1010 DEG C, and at 880 DEG C, finish rolling adds up reduction ratio 82.6% to finishing temperature,
Last three percentage pass reduction is not less than 10%, and the thickness of slab after finish rolling is 8mm.Steel plate after rolling opens 850 DEG C of cold temperature, and laminar flow is cold
But to being air cooled to room temperature using cold bed after 400 DEG C, you can obtain the HB500 grades of Micro Alloying wear-resisting steel plate.The present embodiment gained
The section Brinell hardness of wear-resisting steel plate is HB530.
Embodiment 3：The composition proportion and manufacture method of this HB500 grades of Micro Alloying wear-resisting steel plate are as described below.
Originally the chemical composition of quenched wear-resisting steel plate is by mass percentage：C 0.24%, Si 0.30%, Mn 1.6%, P
0.005%, S 0.006%, Cr 0.3%, Mo 0.3%, Ni 1.2%, Cu 1.2%, Nb 0.1%, V 0.1%, B 0.001%, rare earth
0.001%, remaining is Fe and inevitable impurity；Thickness is 50mm.
By molten steel and the ingot casting of above-mentioned chemical composition is cast into, ingot casting is carried out to roll preceding heating, heating-up temperature is
1200 DEG C, the heat time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature at 1120 DEG C, 1030 DEG C of finishing temperature, slightly
It is 51.5% to roll accumulative reduction ratio；Finish rolling start rolling temperature is 1000 DEG C, and at 920 DEG C, finish rolling adds up reduction ratio 50% to finishing temperature, most
Three percentage pass reductions are not less than 10% afterwards, and the thickness of slab after finish rolling is 50mm.Steel plate after rolling opens 900 DEG C of cold temperature, section cooling
Room temperature is air cooled to using cold bed after to 500 DEG C, you can obtain the HB500 grades of Micro Alloying wear-resisting steel plate.The present embodiment gained is resistance to
The section Brinell hardness for grinding steel plate is HB508.
Embodiment 4：The composition proportion and manufacture method of this HB500 grades of Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this wear-resisting steel plate is by mass percentage：C 0.29%, Si 0.3%, Mn 1.4%, P 0.015%, S
0.004%, Cr 0.2%, Mo 0.2%, Ni 1.2%, Cu 1.3%, Ti 0.1%, Nb 0.1%, Al 0.05%, N 0.005%, B
0.004%, rare earth 0.002%, remaining is Fe and inevitable impurity；Thickness is 15mm.
By molten steel and the ingot casting of above-mentioned chemical composition is cast into, ingot casting is carried out to roll preceding heating, heating-up temperature is
1220 DEG C, the heat time is 3.5 hours.Using two benches controlled rolling, roughing start rolling temperature at 1100 DEG C, 1050 DEG C of finishing temperature,
The accumulative reduction ratio of roughing is 72.1%；Finish rolling start rolling temperature is 990 DEG C, and at 920 DEG C, finish rolling adds up reduction ratio to finishing temperature
82.6%, last three percentage pass reduction is not less than 10%, and the thickness of slab after finish rolling is 15mm.Steel plate after rolling is cooled down using cold bed
Mode be air cooled to room temperature, you can obtain the HB500 grades of Micro Alloying wear-resisting steel plate.The section of the present embodiment gained wear-resisting steel plate
Brinell hardness is HB513.
Embodiment 5：The composition proportion and manufacture method of this HB500 grades of Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this HB500 grades of Micro Alloying wear-resisting steel plate is by mass percentage：C 0.27%, Si 0.35%, Mn
1.6%, P 0.010%, S 0.01%, Cr 0.6%, Mo 0.3%, Ni 0.8%, Cu 1.0%, V 0.2%, Al 0.01%, N
0.005%, O 0.003%, B 0.005%, remaining is Fe and inevitable impurity；Thickness is 8mm.
Above chemical composition carries out melting and is cast into ingot casting by mass percentage, and ingot casting is carried out to roll preceding heating, heating
Temperature is 1250 DEG C, and the heat time is 2.5 hours.Using two benches controlled rolling, roughing start rolling temperature is in 1140 DEG C, finishing temperature
1040 DEG C, the accumulative reduction ratio of roughing is 72.1%；Finish rolling start rolling temperature is 980 DEG C, and finishing temperature is in 850 DEG C, the accumulative pressure of finish rolling
Rate 82.6%, last three percentage pass reduction is not less than 10%, and the thickness of slab after finish rolling is 8mm.Steel plate after rolling opens cold temperature 800
DEG C, section cooling is air cooled to room temperature to 450 DEG C and then using cold bed, you can obtain the HB500 grades of Micro Alloying wear-resisting steel plate.This
The section Brinell hardness of embodiment gained wear-resisting steel plate is HB525.
Embodiment 6：The composition proportion and manufacture method of this HB500 grades of Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this HB500 grades of Micro Alloying wear-resisting steel plate is by mass percentage：C 0.34%, Si 0.20%, Mn
1.2%, P 0.012%, S 0.005%, Cr 0.7%, Mo 0.2%, Ni 0.9%, Cu 1.4%, Ti 0.04%, Nb 0.07%, N
0.002%, O 0.001%, rare earth 0.02%, remaining is Fe and inevitable impurity；Thickness is 22mm.
Above chemical composition carries out melting and is cast into ingot casting by mass percentage, and ingot casting is carried out to roll preceding heating, heating
Temperature is 1210 DEG C, and the heat time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature is in 1110 DEG C, finishing temperature 1000
℃；Finish rolling start rolling temperature is 980 DEG C, and at 860 DEG C, finish rolling adds up reduction ratio 74% to finishing temperature, and last three percentage pass reduction is not small
In 11%, the thickness of slab after finish rolling is 22mm.Steel plate after rolling opens 820 DEG C of cold temperature, and section cooling is to 470 DEG C and then using cold
Bed is air cooled to room temperature, you can obtain the HB500 grades of Micro Alloying wear-resisting steel plate.The section Bu Shi of the present embodiment gained wear-resisting steel plate
Hardness is HB522.
Claims (8)
1. a kind of HB500 grades of Micro Alloying wear-resisting steel plate, it is characterised in that the weight/mass percentage composition of its chemical composition is：C 0.24
~0.34%, Si 0.20~0.40%, Mn 1.20~1.60%, P≤0.015%, S≤0.01%, Cr 0.2~1.0%, Mo 0.1
~0.3%, Ni 0.5~1.2%, Cu 1.0~1.6%, Ti≤0.1%, Nb≤0.1%, V≤0.2%, Al≤0.05%, N≤
0.005%, O≤0.003%, B 0.001~0.005%, rare earth 0~0.02%, remaining is iron and inevitable impurity.
2. HB500 grades of Micro Alloying wear-resisting steel plate according to claim 1, it is characterised in that：The steel plate thickness be 8~
50mm。
3. a kind of manufacture method of HB500 grades of Micro Alloying wear-resisting steel plate, it is characterised in that：It includes heating, rolls and bosher
Sequence；The weight/mass percentage composition of the steel plate chemical composition is：C 0.24~0.34%, Si 0.20~0.40%, Mn 1.20~
1.60%, P≤0.015%, S≤0.01%, Cr 0.2~1.0%, Mo 0.1~0.3%, Ni 0.5~1.2%, Cu 1.0~1.6%,
Ti≤0.1%, Nb≤0.1%, V≤0.2%, Al≤0.05%, N≤0.005%, O≤0.003%, B 0.001~0.005%, rare earth 0
~0.02%, remaining is iron and inevitable impurity.
4. the manufacture method of HB500 grades of Micro Alloying wear-resisting steel plate according to claim 3, it is characterised in that the heating
Operation：Heating and temperature control is at 1200~1250 DEG C.
5. the manufacture method of HB500 grades of Micro Alloying wear-resisting steel plate according to claim 3, it is characterised in that the rolling
Operation：1100~1150 DEG C of roughing start rolling temperature, 1000~1050 DEG C of finishing temperature；The accumulative reduction ratio of finish rolling is not less than 50%, most
Three percentage pass reductions are not less than 10%, 980~1030 DEG C of finish rolling start rolling temperature, 850~950 DEG C of finishing temperature afterwards.
6. the manufacture method of HB500 grades of Micro Alloying wear-resisting steel plate according to claim 5, it is characterised in that：The rolling
In operation, steel plate thickness is 8~50mm after finish rolling.
7. the HB500 grades of manufacture method of Micro Alloying wear-resisting steel plate according to claim 3-6 any one, its feature exists
In the refrigerating work procedure：Using air cooling or section cooling；In the section cooling, 800~900 DEG C of cold temperature is opened, be cooled to
Air cooling after 400~500 DEG C.
8. the manufacture method of HB500 grades of Micro Alloying wear-resisting steel plate according to claim 7, it is characterised in that：The cooling
Air cooling in operation is cooled down using cold bed.
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| CN107217202A (en) * | 2017-07-19 | 2017-09-29 | 武汉钢铁有限公司 | The abrasion-resistant stee and its manufacture method of a kind of 500 grades of Brinell hardness |
| CN107746921A (en) * | 2017-12-06 | 2018-03-02 | 徐工集团工程机械有限公司 | A kind of medium carbon alloy steel and preparation method thereof |
| CN108754330A (en) * | 2018-06-21 | 2018-11-06 | 武汉钢铁有限公司 | 550 grade wear-resisting steel of Brinell hardness and manufacturing method |
| CN112080688A (en) * | 2020-08-11 | 2020-12-15 | 江苏联峰实业有限公司 | Medium-carbon niobium-vanadium-titanium composite reinforced non-quenched and tempered steel and production method thereof |
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| CN115522139A (en) * | 2022-09-02 | 2022-12-27 | 包头钢铁（集团）有限责任公司 | F28MnVRE malleable non-quenched and tempered hot-rolled round steel for piston and preparation method thereof |
| CN115522139B (en) * | 2022-09-02 | 2023-12-08 | 包头钢铁（集团）有限责任公司 | F28MnVRE forgeable non-quenched and tempered hot-rolled round steel for piston and preparation method thereof |
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