CN108546874A - Inexpensive HB400 grades of cut deal wear-resisting steel plate and manufacturing method - Google Patents

Inexpensive HB400 grades of cut deal wear-resisting steel plate and manufacturing method Download PDF

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Publication number
CN108546874A
CN108546874A CN201810398726.3A CN201810398726A CN108546874A CN 108546874 A CN108546874 A CN 108546874A CN 201810398726 A CN201810398726 A CN 201810398726A CN 108546874 A CN108546874 A CN 108546874A
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China
Prior art keywords
wear
grades
resisting steel
low cost
cut deal
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CN201810398726.3A
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Chinese (zh)
Inventor
何亚元
尹云洋
徐进桥
蔡珍
杜明
王世森
李德发
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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Priority to CN201810398726.3A priority Critical patent/CN108546874A/en
Publication of CN108546874A publication Critical patent/CN108546874A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/08Ferrous alloys, e.g. steel alloys containing nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a kind of HB400 grades of cut deal wear-resisting steel plates of low cost and manufacturing method, chemical element component and its weight percent to be:C:0.19~0.22%, Si:1.1~1.3%, Mn:3~3.3%, Ni:0.30~0.36%, Mo:0.15~0.32%, V:0.15~0.25%, P≤0.012%, S≤0.009% meet 0.35%≤V+Mo≤0.45%, remaining is Fe and is inevitably mingled with, and the thickness of steel plate is 20~70mm.The wear-resisting steel plate quenching degree is good, and structure property is uniform, and residual stress is small, and abrasion-resistant stee is avoided repeatedly to be heated at high temperature the micro-crack source that may be brought, and cracking risk significantly reduces in application process, and tensile strength reaches 1200MPa or more, 380 or more Brinell hardness.

Description

Inexpensive HB400 grades of cut deal wear-resisting steel plate and manufacturing method
Technical field
The invention belongs to abrasion-resistant stee manufacturing fields, and in particular to a kind of HB400 grades of cut deal wear-resisting steel plates of low cost and system Make method.
Background technology
Abrasion-resistant stee is important one of basic material, be widely used in mining machinery, coal fells and transports, engineering machinery, building materials, The fields such as electric machinery, railway transportation classify by metallographic structure, are divided into Austenitic abrasion-resistant stee, martensite type abrasion-resistant stee and shellfish Family name's build abrasion-resistant stee, wherein martensite wear resistant steel generally use Mn, Mo, Cr, Ni etc. element alloyed, also add sometimes Nb, V, The microalloy elements such as Ti obtain the tissue based on martensite by quenching+tempering, show in practical applications excellent comprehensive Close mechanical property.
However under the increasingly deficient situation of the market competition of steel industry sternness and resource, using out-line quenching+tempering Though process route production martensite wear resistant steel structure property meet product requirement, it, which fails to make full use of, rolls rear waste heat, And process route is longer, energy consumption is big, and production cost is higher, develops in the direction of steel industry towards short route, low energy consumption Background under, the market competitiveness is not strong.
Chinese invention patent application (publication number CN102605234A) provides a kind of HB400 grade wear-resisting steel plates and its manufacture Method, composition by weight percent are:C:0.08~0.24%, Si:0.1~0.3%, Mn:0.7~1.7%, Cr:1.0%, Mo:0.6%, B:0.0005~0.004%, Ti:0.005~0.04% remaining be Fe and micro impurity element, using casting-control - quenching-and-tempering process production is rolled, function admirable, the equipment easy to wear suitable for manufacturing engineering machinery is disadvantageous in that tune Matter heat treatment process cost is higher and the production cycle is longer, and cost of alloy can further decrease.
Chinese invention patent application (publication number CN107513661A) discloses a kind of with corrosion resistance wear-resisting steel plate And its production method, steel plate chemical composition composition and mass percentage are:0.18%≤C≤0.23%, 0.60%≤Si≤ 0.80%, 1.20%≤Mn≤1.60%, P≤0.010%, S≤0.002%, 0.85%≤Cr≤1.15%, 0.25%≤Mo ≤ 0.35%, 0.60%≤Al≤0.80%, 0.20%≤Ni≤0.30%, 0.04%≤V≤0.06%, surplus is for Fe and not Evitable impurity;Plate Production method includes smelting+continuous casting, electroslag remelting, heating, rolling, expands hydrogen, quenching, tempering process. The present invention by being adjusted to steel plate chemical composition, in conjunction with it is suitable smelt, heating, rolling, the technologies such as heat treatment, production Mechanical property of steel plate is excellent, and corrosion resistance also significantly improves, but the steel also needs not only with the process route of quenching+tempering Electroslag remelting, production cost are higher.
Chinese invention patent application (publication number CN1109919A) provides a kind of low-alloy wear-resistant steel, Ingredients Weight hundred Point ratio 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 preferable, but big Amount addition improves the alloying element of quenching degree, and cost is higher, and C, Si content height are also easy to produce hardening flaw, adds rare earth element and mesh Economizing on resources for preceding promotion is disagreed.
As it can be seen that there are production costs is higher, the reality of technological process length is difficult for dilute-alloy martensite abrasion-resistant stee in the prior art Topic, it is therefore necessary to carry out new Alloying Design, optimized production process reduces production cost.
Invention content
Present invention aim to provide a kind of to improve quenching degree, reduce in inexpensive HB400 grades of energy consumption Slab wear-resisting steel plate and manufacturing method.
To achieve the above object, the technical solution adopted by the present invention is:Inexpensive HB400 grades of cut deal wear-resisting steel plate, Chemical element component and its weight percent are:C:0.19~0.22%, Si:1.1~1.3%, Mn:3~3.3%, Ni:0.30 ~0.36%, Mo:0.15~0.32%, V:0.15~0.25%, P≤0.012%, S≤0.009% meet 0.35%≤V+ Mo≤0.45%, remaining is Fe and is inevitably mingled with, and the thickness of steel plate is 20~70mm.
The mechanism of each element content control and effect are as follows:
1) C is that alloying element formation carbide is essential in raising material wear-resistant performance most cheap element and steel Element, with the increase of phosphorus content, hardness, intensity and wearability improve, but plasticity and toughness and welding performance reduce.Synthesis is examined Consider, C weight percentages are 0.19~0.22%.
2) Si can reduce austenite phase field, lower in carbon content, and Si can significantly reduce the critical cooling speed of steel Degree makes final product form the martensitic structure of refinement.In common solid solution element, Si is only second to P, be solid-solution in ferrite and In austenite, their hardness and strength can be improved, Si can reduce diffusion velocity of the carbon in ferrite, make to be precipitated when tempering Carbide is not easy to assemble, and improves temper resistance.Si can reduce oxidation when frictional heating, improve the flow harden of steel The wearability of rate and wearability, silico-manganese steel is improved with the increase of Si contents.Consider, Si weight percentages be 1.1~ 1.3% is advisable.
3) Mn is the element of most economical raising quenching degree, can significantly reduce the Ar1 temperature of steel, the decomposition rate of austenite And martensite transformation temperature, manganese can also significantly reduce the critical quenching rate of steel, hardness and strength can be improved by being infinitely dissolved with Fe. But Mn content Ruo Taigao, can increase steel belt roof bolt brittleness, consider, and Mn weight percentages are advisable for 3~3.3%.
4) quenching degree can be improved in Ni, and when being combined with Mo, quenching degree is more excellent, and Ni can not only improve the intensity of steel, but also can make tough Property keep high level, consider, Ni weight percentages are 0.30~0.36% to be advisable.
5) Mo significantly inhibits bainite and ferritic transformation, in quenched and tempered state low-alloy wear-resistant steel, Mo energy crystal grain thinnings, together Shi Zengjia resistance to corrosions when Mo is solid-solution in ferrite and austenite, can be such that C curve moves to right, and quenching degree be improved, in addition, Mo is also It is avoided that the embrittlement phenomena (temper brittleness) occurred when steel is tempered at 400~500 DEG C or so, improves temper resistance, When so that steel being tempered at a higher temperature, residual stress is more effectively eliminated or reduced, is considered, Mo weight percentages It is 0.28~0.32%.
6) V is mainly that carbide form exists in steel, and main function is the tissue and crystal grain for refining steel, improves the comprehensive of steel Performance is closed, V increases the temper resistance of hardened steel, and generates post-curing effect.The strong of steel is mainly improved in quenched and tempered steel Degree and yield tensile ratio, crystal grain thinning reduce superheated susceptivity.Consider, V weight percentages are 0.22~0.25%.
7) P, S are harmful impurity elements in steel, and P forms segregation easily in steel in steel, reduces the toughness and weldability of steel Can, S has formed plasticity sulfide, and steel plate is made to generate layering, deteriorates plate property, therefore the lower P, S content the better, considers, It is P≤0.012%, S≤0.009% by P, S content of steel.
8) polynary a small amount of alloying element is significantly greater than the influence of quenching degree the influence of single alloy, while adding V and Mo Bigger is acted on to the raising of quenching degree than individually adding Mo elements, although the former total amount is less than the latter.Therefore, it is required in the present invention V+Mo >=0.35%, primarily to synergistic effect is given full play to, but due to being added to 3%~3.3% Mn, V+Mo mistakes Height can cause the more than needed of element, improve production cost, therefore consider, 0.35%≤V+Mo≤0.45%.
Further, the weight percent of the C is preferably 0.21~0.22%.
Further, the weight percent of the Si is preferably 1.15~1.26%.
Further, the weight percent of the Mn is preferably 3.1~3.2%.
Further, the weight percent of the Ni is preferably 0.32~0.35%.
Further, the weight percent of the Mo is preferably 0.18~0.19%.
Further, the weight percent of the V is preferably 0.19~0.22%.
Further, preferably 0.38~0.4% the V+Mo.
Further, the thickness of the steel plate is 55~70mm.
A kind of HB400 grades of cut deal wear-resisting steel plate manufacturing methods of low cost as described above are also provided, are included the following steps:
1) it smelts, cast
It is uniformly mixed by the ingredient and weight percent and forms molten iron, molten iron is then taken off into S processing through deep, then true with RH Empty set system refined molten steel, is finally cast as strand;
2) it heats
By heating strand to 1150~1200 DEG C and keep the temperature 150~180min;
3) it rolls
Rolling mill practice takes TMCP techniques, 1080~1150 DEG C of start rolling temperature, 890~930 DEG C of finish rolling start rolling temperature, finish to gauge 770~800 DEG C, last three passages add up reduction ratio 20~40%,;
4) it quenches, is cooling
Press quenching, and water-spraying control are used after rolling, open 710~760 DEG C of cold temperature, 26~35 DEG C/s of cooling rate is returned red 170~240 DEG C of temperature, 530~580 DEG C of heat treatment process temperature, tempering time are plate thickness × 3.5~4.5min/mm.
It after smelting, pouring into strand, is rolled on heavy and medium plate mill, heating temperature uses low-temperature heat, control At 1150~1200 DEG C, to ensure tiny austenite grain, 150~180min is kept the temperature, austenite is made to homogenize.
Rolling mill practice takes TMCP techniques, 1080~1150 DEG C of start rolling temperature, 890~930 DEG C of finish rolling start rolling temperature, finish to gauge 770~800 DEG C, last three passages add up reduction ratio 20~40%, and main purpose is to promote crystal grain refinement uniform, are used after rolling Line quenches, and rapid water-spraying control opens 710~760 DEG C of cold temperature, 26~35 DEG C/s of cooling rate, 170~240 DEG C of red temperature, at heat Science and engineering skill uses high tempering, and 530~580 DEG C of temperature, tempering time is plate thickness × 3.5~4.5min/mm, using high temperature Tempering can get tempered sorbite tissue, more fully discharge internal stress, reduce the possibility that crackle generates, and significant decrease makes With the probability to crack in the process.
Compared with prior art, beneficial effects of the present invention are as follows:
1) it uses TMCP+ tempering process to replace Conventional Off-line quenching+tempering technique, reduces energy consumption, shorten production Period, production cost significantly reduce;
2) quenching degree is good, and structure property is uniform, and residual stress is small, avoids abrasion-resistant stee repetition high-temperature heating that from may bringing micro- Formation of crack, cracking risk significantly reduces in application process;
3) tensile strength reaches 1200MPa or more, 380 or more Brinell hardness.
Description of the drawings
Fig. 1 is invention HB400 grades of cut deal wear-resisting steel plate metallographic structure figures of low cost.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, convenient for more clearly understanding the present invention, but it Not to the present invention constitute limit.
After taking smelting in following embodiment, pouring into strand, is rolled on heavy and medium plate mill, be then tempered Processing.
1 each embodiment of table and comparative example chemical composition and weight percent
2 each embodiment of table and comparative example technological parameter
According to GB/T228 and GB/T231 national standards, 1~4 described HB400 grades of cut deals of low cost of testing example are resistance to The performance for grinding steel is as shown in table 3, it is seen then that the NM400 tensile strength and hardness produced under 4 kinds of techniques is substantially at together with embodiment One is horizontal, illustrates that embodiment under the premise of shortening process route and reducing production cost, does not reduce its mechanical property, thickness Direction centre hardness is at least up to 92% of case hardness or more, and is only capable of reaching the 79~84% of case hardness in comparative example, says The quenching degree of bright embodiment is more preferable than comparative example, and microscopic structure is tempered sorbite, and case hardness uniformly can also react micro- group Knit uniformity, the uniformity of structure property is good, and residual stress is small, and can avoid abrasion-resistant stee repeat high-temperature heating may bring it is micro- Formation of crack, cracking risk significantly reduces in application process.
3 each embodiment of table and comparative example mechanical property
From figure 1 it appears that HB400 grades of cut deal wear-resisting steel plates of low cost produced by the present invention are tempered sorbite, Quenching degree is good, and structure property is uniform, and residual stress is small.

Claims (10)

1. a kind of HB400 grades of cut deal wear-resisting steel plates of low cost, it is characterised in that:Its chemical element component and its weight percent For:C:0.19~0.22%, Si:1.1~1.3%, Mn:3~3.3%, Ni:0.30~0.36%, Mo:0.15~0.32%, V:0.15~0.25%, P≤0.012%, S≤0.009% meet 0.35%≤V+Mo≤0.45%, remaining is Fe and can not What is avoided is mingled with, and the thickness of steel plate is 20~70mm.
2. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The weight percent of the C Than being preferably 0.21~0.22%.
3. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The weight hundred of the Si Divide than preferably 1.15~1.26%.
4. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The weight hundred of the Mn Divide than preferably 3.1~3.2%.
5. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The weight hundred of the Ni Divide than preferably 0.32~0.35%.
6. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The weight hundred of the Mo Divide than preferably 0.18~0.19%.
7. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The weight percent of the V Than being preferably 0.19~0.22%.
8. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The V+Mo is preferred 0.38~0.4%.
9. HB400 grades of cut deal wear-resisting steel plates of low cost according to claim 1, it is characterised in that:The thickness of the steel plate For 55~70mm.
10. a kind of HB400 grades of cut deal wear-resisting steel plate manufacturing methods of low cost as described in claim 1, it is characterised in that:Including Following steps:
1) it smelts, cast
It is uniformly mixed by the ingredient and weight percent and forms molten iron, then by molten iron through deep de- S processing, then with RH vacuum system System refined molten steel, is finally cast as strand;
2) it heats
By heating strand to 1150~1200 DEG C and keep the temperature 150~180min;
3) it rolls
Rolling mill practice takes TMCP techniques, 1080~1150 DEG C of start rolling temperature, 890~930 DEG C of finish rolling start rolling temperature, finish to gauge 770 ~800 DEG C, last three passages add up reduction ratio 20~40%,;
4) it quenches, is cooling
Press quenching, and water-spraying control are used after rolling, open 710~760 DEG C of cold temperature, 26~35 DEG C/s of cooling rate, red temperature 170~240 DEG C, 530~580 DEG C of heat treatment process temperature, tempering time is plate thickness × 3.5~4.5min/mm.
CN201810398726.3A 2018-04-28 2018-04-28 Inexpensive HB400 grades of cut deal wear-resisting steel plate and manufacturing method Pending CN108546874A (en)

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Application Number Priority Date Filing Date Title
CN201810398726.3A CN108546874A (en) 2018-04-28 2018-04-28 Inexpensive HB400 grades of cut deal wear-resisting steel plate and manufacturing method

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103014543A (en) * 2012-12-30 2013-04-03 南阳汉冶特钢有限公司 Production process of wear-resistant steel NM400E medium plate
CN103397275A (en) * 2013-08-09 2013-11-20 钢铁研究总院 Martensite series wear-resistant steel and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103014543A (en) * 2012-12-30 2013-04-03 南阳汉冶特钢有限公司 Production process of wear-resistant steel NM400E medium plate
CN103397275A (en) * 2013-08-09 2013-11-20 钢铁研究总院 Martensite series wear-resistant steel and preparation method thereof

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Application publication date: 20180918