CN108060362A - A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its processing method - Google Patents

A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its processing method Download PDF

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CN108060362A
CN108060362A CN201711392536.2A CN201711392536A CN108060362A CN 108060362 A CN108060362 A CN 108060362A CN 201711392536 A CN201711392536 A CN 201711392536A CN 108060362 A CN108060362 A CN 108060362A
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abrasion
resistant stee
crack
grades
heterogeneous structure
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李德发
官计生
严翔
王世森
马玉喜
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

Abstract

The invention discloses a kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee, main chemical compositions and shared mass percent are：C 0.15~0.20%, Si 0.80 1.20%, Mn 1.20~1.55%, P≤0.015%, S≤0.010%, Cr 0.85~1.25%, Mo 0.25 0.55%, Nb 0.02~0.04%, Ti 0.005~0.025%, B 0.001~0.005%, Als 0.010~0.040%, N≤0.0055%, remaining is Fe and micro impurity element.The techniques such as binding constituents design of the present invention, controlled rolling process, temper, gained abrasion-resistant stee has many advantages, such as that cost of alloy is low, preparation process is simple, solve the problems, such as that martensite wear resistant steel is also easy to produce crackle, abrasion-resistant stee safety in utilization and high efficiency are improved, there is important economic benefit and social benefit.

Description

A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its processing method
Technical field
The invention belongs to mechanical engineering abrasion-resistant stee manufacturing fields, and in particular to a kind of HB450 grades of anti-crack heterogeneous structure Abrasion-resistant stee and its processing technology.
Background technology
Abrasion-resistant stee is used primarily in bull-dozer, loading machine, excavator, dumper and various mining machineries, grab bucket, heap feeding Machine, conveying warp architecture etc..The significant problem that annoying industrial quarters personage always for many years is exactly to wear, and is especially contacted The structure that rock, mineral aggregate etc. are rubbed, hit, washed away, caused economic loss account for total value of production in national economy 4% or so.
To improve wear-resisting property, it is necessary to improve the intensity of abrasion-resistant stee, hardness, and need certain toughness.It is advanced at present Other abrasion-resistant stee is based on martensite steel.Its tissue of martensite wear resistant steel is mainly made of single-phase martensite, using Cr, Ni and Mo etc. It is element alloyed, then by quenching and low-temperature tempering heat treatment, tempered martensite is obtained, the high dislocation with high rigidity Lath martensite, under the conditions of high impact wear, which has apparent superiority, is disadvantageous in that, alloy Cost is higher and heat treatment process requirement is stringent, and crackle is also easy to produce during use.
The high-strength abrasion-proof steel of tensile strength >=1450, it is maximum such as the abrasion-resistant stee of CN1132263A and CN1132264A Tensile strength is respectively 1450 and 1765, depends on the invigoration effect of carbon, and carbon content is higher in steel, and tensile strength is also got over Height, but the too high martensitic structure internal stress for forming quenching of carbon content is big, influences except the other performance of intensity and hardness (such as Toughness and welding performance etc.).Therefore, on the premise of intensity is met the requirements, it usually needs reduce carbon content, and pass through other conjunctions The reasonable of gold adds to make up.Such as 102127705 A of CN, provide a kind of high-strength high-hardness wear-resistant steel, primary chemical into It is divided into C 0.20-0.350%, Si 0.5-1.0%, Mn 1.4-2.0%, V0.03-0.06%, 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 pass through Nb, Ti, V Compound addition reach refined crystalline strengthening and precipitation strength effect, martensite wear resistant steel can be obtained by heat processing technique, tension is strong Degree >=1450MPa, Brinell hardness is more than 440, but toughness deficiency, and single-phase martensite, which is organized in be also easy to produce under internal stress effect, to be split Line.
The content of the invention
It is an object of the invention to solve some technical bottlenecks in the HB450 ranks abrasion-resistant stee production of the current country, provide A kind of manufacture heterogeneous structure abrasion-resistant stee at low cost, simple for process, high comprehensive performance, solves high-level abrasion-resistant stee and is also easy to produce The problem of crackle.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee, chemical composition and shared mass percent are：C 0.15~ 0.20%th, Si 0.80~1.20%, Mn 1.20~1.55%, P≤0.015%, S≤0.010%, Cr 0.85~ 1.25%th, Mo 0.25~0.55%, Nb 0.02~0.04%, Ti 0.005~0.025%, B 0.001~0.005%, Als 0.010~0.040%, N≤0.0055%, remaining is Fe and micro impurity element.
Further, the chemical composition of the HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its shared mass percent For：C 0.15~0.18%, Si 0.80~1.20%, Mn 1.20~1.55%, P≤0.015%, S≤0.010%, Cr 0.85~1.2%, Mo 0.25~0.5%, Nb 0.02~0.04%, Ti 0.005~0.025%, B 0.001~ 0.005%th, Als 0.010~0.040%, N≤0.0055%, remaining is Fe and micro impurity element.
It is main to include chemistry the present invention also provides a kind of preparation method of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee Composition design, controlled rolling process roll rear accelerated cooling process, tempering process, specifically comprise the following steps：
1) smelted by composition design requirement and be casting continuously to form base；
2) mutual aid system devised for poor peasants skill is controlled：Slab heating temperature is 1180~1220 DEG C；And rolled using two-stage control, the first stage rolls Temperature >=1050 DEG C processed, percentage pass reduction >=12%, second stage open temperature≤960 DEG C processed, percentage pass reduction >=10%, finish to gauge Temperature >=860 DEG C；Cold 800~820 DEG C of temperature is opened, cooldown rate is 18~25 DEG C/s；
3) temper, temperature are 220~280 DEG C, and tempering time is thickness of slab mm × 1.5min/mm+20min.
The principle of the present invention is：
1) Design of Chemical Composition
The present invention is to obtain bainite+martensite+retained austenite heterogeneous structure as Design theme, using C-Si-Mn- Mo-Cr and Nb-Ti-B microalloying ingredients design, which is conducive to obtain heterogeneous structure, so as to improve abrasion-resistant stee Wearability, plasticity and toughness, and with excellent cracking resistance energy.
C is most effective solution strengthening element, but very unfavorable to plasticity and toughness, and the high product of phosphorus content makes in processing With easily cracking in the process；Martensite point, M is greatly reduced in the increase of C contentsThe lower change of point is more susceptible to sheet Martensite, crack sensitivity are strong；Therefore it is 0.15~0.25% to design the steel C content scope, effectively improves cracking resistance energy；
Mn can increase the stability of austenite, reduce critical cooling rate during quenching, improve the quenching degree of steel, during quenching Deformation it is also smaller；Mn contents, which increase, to reduce the plasticity of steel, are easily allowed to embrittlement, hardening crack, and Mn promotes its temper brittleness to enhance, Enhance steel to the sensibility from point, it is unfavorable that these factors resist crack performance；Therefore steel Mn content ranges are designed as 1.20 ~1.55%；
An important function of the Si in steel is strong inhibition and the carbide of overcooling austenite is delayed to decompose, and improves Ovshinsky After a certain amount of Si is added in into steel, during deformed austeaite is compared, there is shellfish inside martensitic matrix in body stability The continuous rich carbon retained austenite of family name's body；Presence and its this fractions distribution due to austenite, can make crack branching and blunt Change or generate phase transformation, so as to effectively improve the plasticity of steel；Suitable Si can significantly slow down diffusion speed of the C in tempering Degree increases temper resistance, and the carbide being precipitated during tempering is made to be not easy to assemble, and reduces temper brittleness；Therefore steel Si is designed Content range is 0.80-1.20%；
Cr and the compound additions of Mo can reduce critical cooling rate, the quenching degree for improving steel, in certain cooling velocity scope Inside be conducive to obtain bainite+martensite heterogeneous structure, and can crystal grain thinning, raising intensity and toughness；Cr can be with shape in steel Into a variety of carbide, intensity and hardness are improved, ensures wear-resisting property, Mo is solid-solution in ferrite and austenite in steel, has Solution strengthening and carbide dispersion-strengthened effect；The content of Cr, Mo of the present invention are controlled in Cr 0.35~0.65%, Mo 0.25- 0.55%.
Nb and Ti is carbide, and the compound addition main function of Nb, Ti has refined crystalline strengthening, precipitation strength and consolidates Molten reinforcing；C, N compound of disperse educt can play pinning effect to austenite grain boundary, hinder the migration of austenite grain boundary, that is, hinder Growing up for austenite grain is hindered, while has inhibited austenite recrystallization, crystal grain thinning generates refined crystalline strengthening and precipitation strength synthesis Effect improves cracking resistance energy, and hard particles are apparent to improving wearability effect；The content of Nb and Ti is controlled in Nb 0.02 ~0.04%, Ti 0.005~0.025%.
In order to improve quenching degree, micro B element is added in into steel；The B of solid solution is inclined at the austenite grain boundary before quenching Analysis, by inhibiting ferrite transformation, improves quenching degree；Since B can be precipitated in the form of BN and influence to improve in austenite Therefore the effect of quenching degree, will also fix N by adding Al；B content increase can increase crack sensitivity to crystal boundary segregation. Therefore designing steel B, ALs content range is respectively：B：0.001~0.005%, Als：0.010~0.040%.
S, P are objectionable impurities elements in steel, and P, S content are more low better in steel.When S contents are more in steel, when hot rolling, holds It is also easy to produce the problems such as hot-short；And when P content is more in steel, steel easily occur it is cold short, in addition, phosphorus is also easy to be segregated.
2) preparation process designs
Short route manufacturing process：Controlled rolling-press quenching-tempering substitutes traditional abrasion-resistant stee production technology, shortens production week Phase reduces process cost and process energy consumption；
The present invention is rolled using two-stage control, and it is difficult to understand to obtain bainite+martensite with thermomechanical treatment effect+remnants Family name's body tissue (based on bainite) improves comprehensive mechanical property；Using bainite to the separation effect of martensite, thinning microstructure, It the advantage is that there is the more tiny plane of disruption compared with single organization, energy is absorbed when material is broken to be increased, and hinders crackle It extends and improves toughness, reduce crack sensitivity；
The tempering process that the present invention uses can eliminate stress, improve toughness plasticity, reduce following process and crack probability.
There is gained abrasion-resistant stee of the invention excellent comprehensive mechanical property and cracking resistance (can weld and cut under cryogenic conditions Cutting need not preheat), the safety in utilization and high efficiency of abrasion-resistant stee can be improved；Steel plate thickness specification limit be 15-30mm, Rm >= 1450MPa, elongation percentage >=15%, -40 DEG C of Akv >=60J, HBW/10/3000 >=450.
Compared with prior art, what the present invention used has the beneficial effect that：
1) present invention reduces alloy dosage and ensures the intensity and wearability of material by composition design；Composition design has Beneficial to obtaining heterogeneous structure based on bainite, so as to improve the comprehensive mechanical property of abrasion-resistant stee, especially plasticity, toughness and Cracking resistance energy；Alloy addition level of the present invention is less, and cost of alloy is low, belongs to resource-conserving steel grade, with domestic and international ad eundem Other abrasion-resistant stee is compared, and cost of alloy is low, function admirable.
2) present invention is using short route manufacturing process, using controlled rolling-press quenching-tempering process, substitutes traditional wear-resisting Steel production technology shortens the production cycle, reduces process cost and process energy consumption；Being obtained using cooling controlling and rolling controlling process has deformation heat Bainite+martensite for the treatment of effect+retained austenite tissue improves intensity and wear-resisting property, and is handled by lonneal It eliminates stress and improves toughness plasticity；
3) present invention solves the problems, such as that martensite wear resistant steel is also easy to produce crackle by heterogeneous structure design, improves wear-resisting Steel safety in utilization and high efficiency are welded under the conditions of warm and cut without the pre-heat treatment；With the good market competitiveness and extensively Wealthy application prospect, economic benefit and social benefit are apparent, belong to environmentally friendly and economical steel grade.
Description of the drawings
Fig. 1 is the metallographic structure figure of 1 products therefrom of the embodiment of the present invention.
Specific embodiment
For those skilled in the art is made to more fully understand technical scheme, with reference to specific embodiment to this hair It is bright to be described in further detail.
Examples 1 to 5
The composition design requirement of HB450 described in Examples 1 to 5 grades of anti-crack heterogeneous structure abrasion-resistant stee is shown in Table 1, makes substantially Standby technique includes the following steps：
1) smelted by composition design requirement described in table 1 and be casting continuously to form base；
2) it is 1180~1220 DEG C by gained slab heating temperature；And it is rolled using two-stage control, first stage rolling Temperature >=1050 DEG C, percentage pass reduction >=12%, second stage open temperature≤960 DEG C processed, percentage pass reduction >=10%, finish to gauge temperature >=860 DEG C of degree；Cold 800~820 DEG C of temperature is opened, cooldown rate is 18~25 DEG C/s；Specific process parameter is shown in Table 2；
3) temper is carried out at a temperature of 220~280 DEG C, specific tempering process parameters are shown in Table 2.
Comparative example 1~2
The composition information and process conditions of 1~2 abrasion-resistant stee of comparative example are shown in Tables 1 and 2 respectively.
The composition information of 1~2 abrasion-resistant stee of 1 Examples 1 to 5 of table and comparative example (remaining is Fe and micro impurity element)
It notes, P≤0.015%, S≤0.010% in 1 each abrasion-resistant stee of table.
The preparation process control parameter of 1~2 abrasion-resistant stee of 2 Examples 1 to 5 of table and comparative example
Examples 1 to 3 and comparative example 1,2 gained abrasion-resistant stees are subjected to Mechanics Performance Testing respectively, the results are shown in Table 3.
The mechanical experimental results of abrasion-resistant stee obtained by 3 each embodiment of table and comparative example
Fig. 1 is 1 gained abrasion-resistant stee metallographic structure figure of embodiment, and it can be seen from the figure that, products therefrom is based on bainite The heterogeneous structure of bainite+martensite+retained austenite；And gained tissue is fine, is conducive into promotion cracking resistance energy.
As can be seen from Table 3, the steel plate thickness specification limit of present invention gained abrasion-resistant stee is 10~30mm, and Rm >= 1450MPa, elongation percentage >=15%, -40 DEG C of Akv >=60J, HBW/10/3000 >=450 have excellent cracking resistance energy；The present invention Plate property using the production of thermomechanical processing+tempering process is stablized, and when welding of gained steel plate and gas flame cuttiug does not have to take pre- Hot measure, flawless generate, and work is more efficient, and use is safer.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention and from above-described embodiment Limitation, other any spirit of the invention of not running counter to should be with change, modification, replacement, the simplification made under principle The substitute mode of effect, is included within protection scope of the present invention.

Claims (3)

1. a kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee, which is characterized in that each chemical composition and its shared mass percent For：C 0.15~0.20%, Si 0.80~1.20%, Mn 1.20~1.55%, P≤0.015%, S≤0.010%, Cr 0.85~1.25%, Mo 0.25~0.55%, Nb 0.02~0.04%, Ti 0.005~0.025%, B 0.001~ 0.005%th, Als 0.010~0.040%, N≤0.0055%, remaining is Fe and micro impurity element.
2. HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee according to claim 1, which is characterized in that each chemical composition and Its shared mass percent is：C 0.15~0.18%, Si 0.80~1.20%, Mn 1.20~1.55%, P≤0.015%, S≤0.010%, Cr 0.85~1.2%, Mo 0.25~0.5%, Nb 0.02~0.04%, Ti 0.005~0.025%, B 0.001~0.005%, Als 0.010~0.040%, N≤0.0055%, remaining is Fe and micro impurity element.
3. the preparation method of the HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee of claim 1 or 2, which is characterized in that main bag Include following steps：
1) smelted by composition design requirement and be casting continuously to form base；
2) mutual aid system devised for poor peasants skill is controlled：Slab heating temperature is 1180~1220 DEG C；And it is rolled using two-stage control, first stage rolling temperature >=1050 DEG C of degree, percentage pass reduction >=12%, second stage opens temperature≤960 DEG C processed, percentage pass reduction >=10%, finishing temperature ≥860℃；Cold 800~820 DEG C of temperature is opened, cooldown rate is 18~25 DEG C/s；
3) temper, temperature are 220~280 DEG C, and tempering time is thickness of slab mm × 1.5min/mm+20min.
CN201711392536.2A 2017-12-21 2017-12-21 A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its processing method Pending CN108060362A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109055857A (en) * 2018-08-30 2018-12-21 武汉钢铁有限公司 A kind of edge of shovel HB500 grades of martensite wear resistant steels and its processing method
CN110184545A (en) * 2019-05-24 2019-08-30 武汉钢铁有限公司 A kind of Brinell hardness is half through hardening abrasion-resistant stee of 400HB rank low temperature and production method
CN110541055A (en) * 2019-10-16 2019-12-06 武汉钢铁集团鄂城钢铁有限责任公司 Production method of non-quenched and tempered high-strength wear-resistant steel for HB 450-grade track shoe
CN113215376A (en) * 2021-04-28 2021-08-06 徐工集团工程机械股份有限公司科技分公司 Loader bucket tooth and heat treatment method thereof

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CN113215376B (en) * 2021-04-28 2021-10-15 徐工集团工程机械股份有限公司科技分公司 Loader bucket tooth and heat treatment method thereof

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