CN104451403B - Low temperature HB450 level heterogeneous structure abrasion-resistant stee and production method thereof - Google Patents
Low temperature HB450 level heterogeneous structure abrasion-resistant stee and production method thereof Download PDFInfo
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Abstract
The invention discloses a kind of low temperature HB450 level heterogeneous structure abrasion-resistant stee and production method thereof.Its chemical component weight degree is: C:0.20 0.28%, Si:0.90 1.40%, Mn:1.30 1.60%, P :≤0.013%, S :≤0.012%, Cr:0.50 0.80%, Mo:0.20 0.50%, Ti:0.005 0.025%, B:0.001 0.003%, V:0.02 0.05%, Als:0.020 0.050%, N:0.0050 0.0080%, remaining is Fe and micro impurity element.Compared with the most equal rank abrasion-resistant stee, cost of alloy of the present invention is low, simplified manufacturing process, and performance is more excellent, belongs to resource-conserving steel grade.Solving single-phase martensite abrasion-resistant stee intensity and a difficult problem for plasticity coupling, economic benefit and social benefit are obvious.
Description
Technical field
The invention belongs to engineering machinery abrasion-resistant stee and manufacture field, be specifically related to a kind of low temperature HB450 level heterogeneous structure abrasion-resistant stee
And production method.
Background technology
Abrasion is one of three kinds of main causes (abrasion, corrosion and fatigue) of machine components inefficacy, the abrasion institute of various machine components
The energy caused and the consumption of material are the most surprising.According to statistics, the world industry developed country energy about 30% is with not similar shape
Formula consumes in abrasion.The loss about 100,000,000,000 dollars caused due to fretting wear and rotten candle every year such as the U.S., accounts for national economy and receives
4% entered.According to the incomplete statistics of relevant department of China, domestic annual consumption metal wear resistant material about reaches more than 3,000,000 tons, often
The loss that year abrasion causes reaches 40,000,000,000 yuans.And high-abrasive material is at industrial circles such as building materials, thermal power generation and metallurgical mines
Whole energy and financial cost consumption in occupy sizable proportion.
And abrasion-resistant stee is broadly divided at present: austenitic manganese steel, dilute-alloy martensite steel, bainitic steel, it is more single tissue,
It is unfavorable for improving hardness, intensity, toughness, plasticity and welding performance simultaneously.The intensity of the application height more than 1300MPa at present
The tissue of strength low alloy steel is generally tempered martensite, the subject matter that such steel part and component in use expose
Being that toughness is not enough, delayed fracture drag is low and fatigue limit fluctuation is big, these drawbacks largely reducing tempered martensite steel in intensity
The advantage of aspect of performance.Therefore, develop complex tissue abrasion-resistant stee thus improve combination property, be the research direction of abrasion-resistant stee.
Existing patented technology is introduced having of high-strength abrasion-proof steel a lot, tensile strength typically between 1100-1400, as
CN1109919A, CN102605272A, be respectively arranged with its weak point, be mainly reflected in that cost of alloy is high, manufacturing process complicated,
Performance is defective.CN1109919A provides a kind of low-alloy wear-resistant steel, and its composition by weight percent is: C:0.5-0.6%,
Si:0.9-1.2%, Mn:1.4-1.7%, Cr:1.35-1.60%, Mo:0.3-0.5%, V:0.05-0.10%, Ti:0.03-0.06%,
Re:0.02-0.04%, intensity and wearability are all preferable, but a large amount of alloying element improving quenching degree that adds, relatively costly, C,
Si content height is easily generated hardening flaw, adds rare earth element and disagrees with economizing on resources of promotion at present.CN102605272A carries
Supply a kind of Low-alloy ultrahigh-strength wear-resistant steel and production method thereof, use die casting method to obtain ingot casting, its composition by weight percent
For: C:0.20-0.35%, Si:0.3-0.7%, Mn:0.6-1.0%, Cr:0.7-1.1%, Ni:0.6-1.0%, Mo:0.3-0.7%,
Remaining is Fe and micro impurity element, is disadvantageous in that precious alloy Ni, Cr, Mo addition is big, and cost of alloy is the most relatively
Height, Technology for Heating Processing is complicated, and process cost and energy consumption are the highest.
The high-strength abrasion-proof steel of tensile strength >=1450, such as the abrasion-resistant stee of CN1132263A and CN1132264A, it is maximum anti-
Tensile strength is respectively 1450 and 1765, depends on the invigoration effect of carbon, and in steel, carbon content is the highest, and tensile strength is the highest,
But the highest martensitic structure internal stress making quenching be formed of carbon content is big, impact is except intensity and other performance of hardness, such as toughness
And welding performance.Therefore, on the premise of intensity meets requirement, it usually needs reduce carbon content, and by the conjunction of other alloy
Reason interpolation makes up.Such as CN 102127705A, it is provided that a kind of high-strength high-hardness wear-resistant steel, its main chemical compositions is C:
0.20-0.350%, Si:0.5-1.0%, Mn:1.4-2.0%, V:0.03-0.06%, Nb:0.02-0.04%, Ti:0.02-0.035%,
B:0.0015-0.002%, Al:0-0.03%, N:0.0020-0.0040%, mainly reached by the compound interpolation of Nb, Ti, V
To refined crystalline strengthening and precipitation strength effect, martensite wear resistant steel can be obtained by heat processing technique, tensile strength >=1450MPa,
Brinell hardness is more than 440, and plasticity is preferable, but toughness is not enough, and this technique is industry metaplasia in the case of being heat-treated the most further
Producing difficulty very big, be mainly reflected in plate shape wayward, martensitic structure changes the internal stress produced and can not eliminate, and has generation to split
The risk of line.
Summary of the invention
Present invention aim at providing a kind of low temperature HB450 grade high-strength degree abrasion-resistant stee and production method thereof, low cost of manufacture,
Technique is simple, high comprehensive performance.
For reaching above-mentioned purpose, use technical scheme as follows:
Low temperature HB450 level heterogeneous structure abrasion-resistant stee, its chemical component weight degree is: C:0.20-0.28%, Si:
0.90-1.40%, Mn:1.30-1.60%, P :≤0.013%, S :≤0.012%, Cr:0.50-0.80%, Mo:0.20-0.50%,
Ti:0.005-0.025%, B:0.001-0.003%, V:0.02-0.05%, Als:0.020-0.050%, N:0.0050-0.0080%,
Remaining is Fe and micro impurity element；Steel plate thickness specification limit is 15-40mm, Rm >=1450MPa, elongation percentage >=15% ,-40
DEG C Akv >=47J, HBW/10/3000 >=450.
Low temperature HB450 level heterogeneous structure abrasion-resistant stee, its chemical component weight degree is: C:0.23-0.26%, Si:
1.22-1.32%, Mn:1.38-1.52%, P :≤0.013%, S :≤0.012%, Cr:0.67-0.72%, Mo:0.39-0.43%,
Ti:0.009-0.015%, B:0.0019-0.0024%, V:0.03-0.04%, Als:0.020-0.050%, N:0.0068-0.0073%,
Remaining is Fe and micro impurity element；Steel plate thickness specification limit is 15-40mm, Rm >=1450MPa, elongation percentage >=15% ,-40
DEG C Akv >=47J, HBW/10/3000 >=450.
Low temperature HB450 level heterogeneous structure abrasion-resistant stee, its chemical component weight degree is: C:0.28%, Si:1.40%,
Mn:1.30%, P:0.011%, S:0.008%, Cr:0.80%, Mo:0.50%, Ti:0.025%, B:0.003%,
V:0.05%, Als:0.050%, N:0.0080%, remaining is Fe and micro impurity element；Steel plate thickness specification limit is
15-40mm, Rm >=1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J, HBW/10/3000 >=450.
The production method of above-mentioned low temperature HB450 level heterogeneous structure abrasion-resistant stee, comprises the following steps:
1) smelt and be casting continuously to form base；
2) rolling mill practice: slab heating temperature is at 1180 DEG C～1230 DEG C；Percentage pass reduction >=10%；Finishing temperature: 790-850
℃；
3) cooling: open cold temperature >=750 DEG C；Cooldown rate is 18～25 DEG C/s；Final cooling temperature controls at≤300 DEG C；
4) tempering: temperature 420 ± 10 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min.
A kind of production method of low temperature HB450 level heterogeneous structure abrasion-resistant stee, its chemical component weight degree is: C:
0.28%, Si:1.40%, Mn:1.30%, P:0.011%, S:0.008%, Cr:0.80%, Mo:0.50%, Ti:0.025%,
B:0.003%, V:0.05%, Als:0.050%, N:0.0080%, remaining is Fe and micro impurity element；
Its process is as follows:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1230 DEG C；Percentage pass reduction >=10%, finishing temperature 850 DEG C；
3) opening cold temperature at 810 DEG C, cooling velocity controls at 25 DEG C/sec, and final cooling temperature, at 290 DEG C, naturally cools to room temperature；
4) temperature 430 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=80min；
Steel plate thickness specification limit is 15-40mm, Rm >=1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J, HBW/10/3000
≥450。
C, Mn are maximally effective solution strengthening element, and tradition abrasion-resistant stee is all with high C-Mn for composition design basis, along with in steel
The increase of C, Mn content, intensity and anti-wear performance improve fairly obvious.C is gap solid solution, to plasticity and toughness the most not
Profit, when phosphorus content is more than 0.25%, produces lamellar martensite trend and strengthens, thus anti-crack performance, welding performance are greatly reduced
Deteriorate.Therefore designing this steel C content scope is: 0.20-0.28%.Mn can increase the stability of austenite, expands γ phase region difficult to understand
Family name's body, reduces critical cooling rate during quenching, improves the quenching degree of steel, and deformation during quenching is smaller.But Mn content
During increase, Mn is soluble in ferrite, forms its stability of weak carbide not strong, is easily completely dissolved into Ovshinsky and stops in heating process
In, it is easily generated temper brittleness.Therefore designing this steel Mn content range is: 1.30-1.60%.
The effect that the effect jointly of Si element and other alloying elements (Cr, Mn, Mo) improves experiment steel hardenability is gradually obvious,
Making lath martensite quantity substantially increase, thus make the hardness of experiment steel be gradually increased, toughness the most first raises and reduces afterwards, and Si reaches
To having a strong impact on impact flexibility and welding performance time a certain amount of.A Si important function in steel is strong inhibition and delayed
The carbide of cold austenite decomposes, and improves stabilization of austenite, and after adding a certain amount of Si in steel, deformed austeaite is compared
During, at martensite-bainite intrinsic silicon, continuous print richness carbon retained austenite occurs.Due to the existence of austenite and it this
Plant fractions distribution, crack branching and passivation can be made, or produce phase transformation, thus effectively improve the plasticity of steel.Appropriate Si can
Slow down the C diffusion velocity when tempering significantly, increases temper resistance, and makes the carbide separated out during tempering be difficult to assemble,
Reduce temper brittleness.Therefore designing this steel Si content range is: 0.90-1.40%.
V and Ti is carbide, and in steel, the Main Function of vanadium has refined crystalline strengthening, precipitation strength and solution strengthening.Micro-
In alloying element, Nb, V, Ti have precipitation strength effect, their carbonitride different solubility in austenite, wherein
Carbonitride solubility with V is maximum, is optimal precipitation hardening element.Dissolve V, Ti in phase transition process with
And austenite grain boundary can be played pinning effect by C, N compound of disperse educt after phase transformation, hinder the migration of austenite grain boundary, i.e.
Hinder growing up of austenite crystal, suppress austenite recrystallization, crystal grain thinning simultaneously, produce refined crystalline strengthening and precipitation strength is combined
Close effect.V is unlimited solid solution in the certain temperature range of ferrite area, in the presence of vanadium is with solid solution condition, increases steel tempering stable
Property, i.e. improving the drag to temper softening, substantial amounts of V still exists with precipitated phase, improves intensity and the hardness of steel.Ti can shape
Become the most strong Ti (C, N), 1300 DEG C can be stabilized to, thus can crystal grain thinning, reduce steel overheated tendentiousness, Ti can prevent
Only produce intercrystalline corrosion phenomenon, can improving welding property, Ti can be with S effect, the hot-short effect of reduction sulphur.Therefore this steel is designed
V, Ti, N content scope are respectively Ti:0.005-0.025%, V:0.02-0.05%, N:0.0050-0.0080%.
In steel, the B element of trace is added in order to improve quenching degree.Segregation at the B of solid solution austenite grain boundary before quenching, logical
Cross suppression ferrite transformation, improve quenching degree.Owing in austenite, B can affect raising through hardening so that the form of BN separates out
Property effect, therefore, also will by add Al fix N.B content increases can increase crack sensitivity to Grain Boundary Segregation.Cause
This designs this steel B, ALs content range and is respectively as follows: B:0.001-0.006%, Als:0.020-0.050%.
Cr Yu Mo is compound to be added, and can reduce critical cooling rate, the quenching degree of raising steel, in certain cooling velocity scope
Inside be conducive to obtaining bainite+martensite heterogeneous structure, and can crystal grain thinning, improve intensity and toughness.Cr can be with shape in steel
Becoming multiple carbide, improve intensity and hardness, Mo is solid-solution in ferrite and austenite in steel, has solution strengthening and carbonization
Thing dispersion-strengthened action.In the present invention, the content of Cr, Mo is Cr:0.50-0.80%, Mo:0.20-0.50%.
In steel, S, P are objectionable impurities elements, and in steel, P, S content is the lowest more good.When in steel, S content is more, hold during hot rolling
It is easily generated the problems such as hot-short；And when in steel, P content is more, steel is susceptible to cold short, additionally, phosphorus is also easy to segregation.
Composite alloying composition designs: Cr-Ti-B adds trace vanadium and a certain amount of silicon, and this composition is designed with and beneficially obtains complex phase
Tissue, especially obtains a certain proportion of retained austenite and dispersed granules at martensite+bainite intrinsic silicon, thus improves resistance to
The comprehensive mechanical property especially plasticity of mill steel and toughness, be issued to good comprehensive mechanical property in low cost premise.
To finishing temperature, cooling velocity, the control of tempering process, two-stage control can be used to roll, use this technique to obtain tool
Tangible heating treatment effect martensite+bainite+retained austenite+dispersed granules tissue, improves comprehensive mechanical property.Utilize bayesian
The body separation effect to martensite, thinning microstructure, have an advantage in that compared with single organization there is the more tiny plane of disruption, enter
One step improves toughness.
The beneficial effects of the present invention is:
Design with the current diverse composition of existing abrasion-resistant stee, reduce cost of alloy, reduce alloy dosage and guarantee material
Intensity and wearability；Composition is designed with and beneficially obtains heterogeneous structure, especially obtains a certain proportion of retained austenite, thus carries
The comprehensive mechanical property of High wear-resistant steel especially plasticity and toughness.
Short route manufacturing process: TMCP+ is tempered, and substitutes traditional abrasion-resistant stee production technology, shortens the production cycle, reduces operation and becomes
Basis and process energy consumption, use this technique to obtain and have thermomechanical treatment effect martensite+bainite+retained austenite+dispersed granules group
Knit, improve comprehensive mechanical property.
Excellent comprehensive mechanical property and anti-crack performance, improve safety in utilization and the high efficiency of abrasion-resistant stee.Steel plate thickness specification
Scope is 15-40mm, Rm >=1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J, and HBW/10/3000 >=450 are solderable
Easily processing.
Compared with the most equal rank abrasion-resistant stee, cost of alloy of the present invention is low, simplified manufacturing process, and performance is more excellent, belongs to
In resource-conserving steel grade.The difficult problem solving single-phase martensite abrasion-resistant stee intensity and plasticity coupling improves abrasion-resistant stee use safety
Property and high efficiency.Therefore there is the strongest market competitiveness and wide application prospect, economic benefit and social benefit are obvious.
Accompanying drawing explanation
Fig. 1: embodiment 4 product metallographic structure (martensite+bainite).
Detailed description of the invention
Following example explain technical scheme further, but not as limiting the scope of the invention.
Low temperature HB450 level heterogeneous structure abrasion-resistant stee of the present invention, its chemical component weight degree is: C:0.20-0.28%,
Si:0.90-1.40%, Mn:1.30-1.60%, P :≤0.013%, S :≤0.012%, Cr:0.50-0.80%, Mo:0.20-0.50%,
Ti:0.005-0.025%, B:0.001-0.003%, V:0.02-0.05%, Als:0.020-0.050%, N:0.0050-0.0080%,
Remaining is Fe and micro impurity element.
Optimally, its chemical component weight degree is: C:0.23-0.26%, Si:1.22-1.32%, Mn:1.38-1.52%,
P :≤0.013%, S :≤0.012%, Cr:0.67-0.72%, Mo:0.39-0.43%, Ti:0.009-0.015%, B:
0.0019-0.0024%, V:0.03-0.04%, Als:0.020-0.050%, N:0.0068-0.0073%, remaining is Fe and micro-
Amount impurity element.
Low temperature HB450 level heterogeneous structure abrasion-resistant stee production method process of the present invention is as follows:
1) smelt and be casting continuously to form base；
2) rolling mill practice: slab heating temperature is at 1180 DEG C～1230 DEG C；Percentage pass reduction >=10%；Finishing temperature: 790-850
℃；
3) cooling: open cold temperature >=750 DEG C；Cooldown rate is 18～25 DEG C/s；Final cooling temperature controls at≤300 DEG C；
4) tempering: temperature 420 ± 10 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min.
Steel plate thickness specification limit is 15-40mm, Rm >=1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J, HBW/10/3000
≥450。
Embodiment 1
Its chemical component weight degree is: C:0.20%, Si:0.90%, Mn:1.60%, P:0.013%, S:0.012%,
Cr:0.50%, Mo:0.20%, Ti:0.005%, B:0.001%, V:0.02%, Als:0.020%, N:0.0050%,
Remaining is Fe and micro impurity element.
Low cost HB450 level heterogeneous structure abrasion-resistant stee and processing method thereof, its step:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1180 DEG C；
3) rolling mill practice: percentage pass reduction >=10%, finishing temperature 850 DEG C；
4) opening cold temperature at 790 DEG C, cooling velocity controls at 18 DEG C/sec, and final cooling temperature, at 280 DEG C, naturally cools to room temperature；
5) temperature 410 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=42.5min.
6) stand-by.
Embodiment 2
Its chemical component weight degree is: C:0.23%, Si:1.22%, Mn:1.47%, P:0.012%, S:0.011%,
Cr:0.67%, Mo:0.39%, Ti:0.009%, B:0.0019%, V:0.03%, Als:0.037%, N:0.0068%,
Remaining is Fe and micro impurity element.
Low cost HB450 level heterogeneous structure abrasion-resistant stee and processing method thereof, its step:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1210 DEG C；
3) rolling mill practice: percentage pass reduction >=10%, finishing temperature 790 DEG C；
4) opening cold temperature at 750 DEG C, cooling velocity controls at 21 DEG C/sec, and final cooling temperature, at 270 DEG C, naturally cools to room temperature；
5) temperature 418 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=50min.
6) stand-by.
Embodiment 3
Its chemical component weight degree is: C:0.26%, Si:1.31%, Mn:1.52%, P:0.012%, S:0.010%,
Cr:0.72%, Mo:0.43%, Ti:0.013%, B:0.0024%, V:0.04%, Als:0.046%, N:0.0073%,
Remaining is Fe and micro impurity element.
Low cost HB450 level heterogeneous structure abrasion-resistant stee and processing method thereof, its step:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1220 DEG C；
3) rolling mill practice: percentage pass reduction >=10%, finishing temperature 820 DEG C；
4) opening cold temperature at 760 DEG C, cooling velocity controls at 23 DEG C/sec, and final cooling temperature, at 260 DEG C, naturally cools to room temperature；
5) temperature 420 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=65min.
6) stand-by.
Embodiment 4
Its chemical component weight degree is: C:0.28%, Si:1.40%, Mn:1.30%, P:0.011%, S:
0.008%, Cr:0.80%, Mo:0.50%, Ti:0.025%, B:0.003%, V:0.05%, Als:0.050%, N:
0.0080%, remaining is Fe and micro impurity element.
Low cost HB450 level heterogeneous structure abrasion-resistant stee and processing method thereof, its step:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1230 DEG C；
3) rolling mill practice: percentage pass reduction >=10%, finishing temperature 850 DEG C；
4) opening cold temperature at 810 DEG C, cooling velocity controls at 25 DEG C/sec, and final cooling temperature, at 290 DEG C, naturally cools to room temperature；
5) temperature 430 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=80min.
6) stand-by.Performance characterization metallographic structure figure is (shown in martensite+bainite as figure accompanying drawing 1.)
Embodiment 5
Its chemical component weight degree is: C:0.23%, Si:1.32%, Mn:1.38%, P:0.010%, S:
0.009%, Cr:0.72%, Mo:0.41%, Ti:0.015%, B:0.002%, V:0.03%, Als:0.037%, N:
0.0080%, remaining is Fe and micro impurity element.
Low cost HB450 level heterogeneous structure abrasion-resistant stee and processing method thereof, its step:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1235 DEG C；
3) rolling mill practice: percentage pass reduction >=10%, finishing temperature 830 DEG C；
4) opening cold temperature at 800 DEG C, cooling velocity controls at 22 DEG C/sec, and final cooling temperature, at 270 DEG C, naturally cools to room temperature；
5) temperature 422 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=80min.
6) stand-by.
Comparative example 1
Its chemical component weight degree is: C:0.25%, Si:0.75%, Mn:1.65%, Ti:0.022%, B:
0.0020%, V:0.052%, Nb:0.031%, N:0.0035%, remaining is Fe and micro impurity element.
Its production stage:
1) continuous casting steel billet thickness is 200mm, and slab heating temperature is at 1150 DEG C；
2) rolling mill practice: 1070～1000, is rolling to 40mm, 800～850 DEG C, is rolling to 15mm；
3) shrend, cooling velocity is 20～40 DEG C/s, to room temperature；
4) stand-by.
Comparative example 2
Its chemical component weight degree is: C:0.27%, Si:0.8%, Mn:1.0%, Cr:1.1%, Mo:0.35%,
Ti:0.09%, V:0.17%, remaining is Fe and micro impurity element.
Its production stage:
1) smelt and be casting continuously to form base, ready for rolling；
2) base is rolled at the beginning of, ready for forging；
3) forging molding, oil quenching after deformation；
4) temperature 480 DEG C, obtain tempered sorbite tissue.
5) stand-by.
Table 1 be the various embodiments described above and comparative example after testing after mechanical property situation and comparative example mechanical property list.
Table 1
As can be seen from Table 1, steel plate thickness specification limit of the present invention is 15-40mm, Rm >=1450MPa, elongation percentage >=15%,
-40 DEG C of Akv >=47J, HBW/10/3000 >=450, from example it can be seen that use short route processing technology (TMCP+ tempering)
The steel plate tissue produced reaches design object, stable performance.
Claims (4)
1. low temperature HB450 level heterogeneous structure abrasion-resistant stee, it is characterised in that chemical component weight degree is: C:
0.23-0.26%, Si:1.22-1.32%, Mn:1.38-1.52%, P :≤0.013%, S :≤0.012%, Cr:0.67-0.72%,
Mo:0.39-0.43%, Ti:0.009-0.015%, B:0.0019-0.0024%, V:0.03-0.04%, Als:0.020-0.050%,
N:0.0068-0.0073%, remaining is Fe and micro impurity element；Steel plate thickness specification limit be 15-40mm, Rm >=
1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J, HBW/10/3000 >=450.
2. low temperature HB450 level heterogeneous structure abrasion-resistant stee, it is characterised in that chemical component weight degree is: C:0.28%,
Si:1.40%, Mn:1.30%, P:0.011%, S:0.008%, Cr:0.80%, Mo:0.50%, Ti:0.025%,
B:0.003%, V:0.05%, Als:0.050%, N:0.0080%, remaining is Fe and micro impurity element；Steel plate thickness
Specification limit is 40mm, Rm >=1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J, HBW/10/3000 >=450.
3. the production method of HB450 level heterogeneous structure abrasion-resistant stee of low temperature described in any one of claim 1-2, it is characterised in that
Comprise the following steps:
1) smelt and be casting continuously to form base；
2) rolling mill practice: slab heating temperature is at 1180 DEG C～1230 DEG C；Percentage pass reduction >=10%；Finishing temperature: 790-850 DEG C；
3) cooling: open cold temperature >=750 DEG C；Cooldown rate is 18～25 DEG C/s；Final cooling temperature controls at≤300 DEG C；
4) tempering: temperature 420 ± 10 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min.
4. a low temperature production method for HB450 level heterogeneous structure abrasion-resistant stee, its chemical component weight degree is: C:
0.28%, Si:1.40%, Mn:1.30%, P:0.011%, S:0.008%, Cr:0.80%, Mo:0.50%, Ti:0.025%,
B:0.003%, V:0.05%, Als:0.050%, N:0.0080%, remaining is Fe and micro impurity element；It produced
Journey is as follows:
1) smelt and be casting continuously to form base；
2) heating strand, slab heating temperature is at 1230 DEG C；Percentage pass reduction >=10%, finishing temperature 850 DEG C；
3) opening cold temperature at 810 DEG C, cooling velocity controls at 25 DEG C/sec, and final cooling temperature, at 290 DEG C, naturally cools to room temperature；
4) temperature 430 DEG C, tempering time is thickness of slab mm × 1.5min/mm+20min=80min；
Steel plate thickness specification limit is 40mm, Rm >=1450MPa, elongation percentage >=15% ,-40 DEG C of Akv >=47J,
HBW/10/3000≥450。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410745269.2A CN104451403B (en) | 2014-12-05 | 2014-12-05 | Low temperature HB450 level heterogeneous structure abrasion-resistant stee and production method thereof |
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| CN201410745269.2A CN104451403B (en) | 2014-12-05 | 2014-12-05 | Low temperature HB450 level heterogeneous structure abrasion-resistant stee and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104451403A CN104451403A (en) | 2015-03-25 |
| CN104451403B true CN104451403B (en) | 2016-08-17 |
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| CN104946977A (en) * | 2015-05-28 | 2015-09-30 | 武汉钢铁(集团)公司 | Low temperature-resistant high strength anchor bar steel and production method thereof |
| CN105002430A (en) * | 2015-06-05 | 2015-10-28 | 武汉钢铁(集团)公司 | HB360 level complex-phase structure wear-resisting steel plate and production method thereof |
| CN105861928A (en) * | 2016-06-17 | 2016-08-17 | 山东钢铁股份有限公司 | 4-8mm thick HB450 grade wear-resistant steel plate used for engineering machinery and manufacturing method thereof |
| CN106756489A (en) * | 2016-12-14 | 2017-05-31 | 武汉钢铁股份有限公司 | 450 grades of anti-crack high-strength abrasion-proof steels of Brinell hardness and its manufacture method |
| CN107916370A (en) * | 2017-11-10 | 2018-04-17 | 武汉钢铁有限公司 | Low temperature HB400 grades of heterogeneous structure abrasion-resistant stees and its processing method |
| CN108060362A (en) * | 2017-12-21 | 2018-05-22 | 武汉钢铁有限公司 | A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its processing method |
| CN110396641B (en) * | 2018-04-24 | 2021-04-27 | 武汉钢铁有限公司 | Non-quenched and tempered HB 360-grade medium plate wear-resistant steel with good hardenability and production method thereof |
| CN110541055B (en) * | 2019-10-16 | 2020-12-25 | 宝武集团鄂城钢铁有限公司 | Production method of non-quenched and tempered high-strength wear-resistant steel for HB 450-grade track shoe |
| KR102314432B1 (en) * | 2019-12-16 | 2021-10-19 | 주식회사 포스코 | Wear resistant steel havinh high hardness and excellent low-temperature impact toughness and method for manufacturing thereof |
| CN114058945B (en) * | 2021-10-14 | 2023-01-20 | 首钢集团有限公司 | High-strength bainite wear-resistant steel plate and production method thereof |
| CN114395729B (en) * | 2021-12-13 | 2023-09-01 | 唐山中厚板材有限公司 | NM 450-grade wear-resistant steel plate without quenching heat treatment and production method thereof |
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| CN101775539B (en) * | 2009-01-14 | 2012-03-28 | 宝山钢铁股份有限公司 | High-flexibility wear-resistant steel plate and manufacturing method thereof |
| CN102560272B (en) * | 2011-11-25 | 2014-01-22 | 宝山钢铁股份有限公司 | Ultrahigh-strength abrasion-resistant steel plate and manufacturing method thereof |
| CN103146997B (en) * | 2013-03-28 | 2015-08-26 | 宝山钢铁股份有限公司 | A kind of low-alloy high-flexibility wear-resistant steel plate and manufacture method thereof |
| CN103194684B (en) * | 2013-03-28 | 2016-08-03 | 宝山钢铁股份有限公司 | A kind of wear-resisting steel plate and manufacture method thereof |
| JP6007847B2 (en) * | 2013-03-28 | 2016-10-12 | Ｊｆｅスチール株式会社 | Wear-resistant thick steel plate having low temperature toughness and method for producing the same |
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