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 PDFInfo
- 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
- Authority
- CN
- China
- Prior art keywords
- wear
- grades
- resisting steel
- low cost
- cut deal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- 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
- 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
- C21D8/0263—Modifying 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
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- 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
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.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108546874A true CN108546874A (en) | 2018-09-18 |
Family
ID=63513124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810398726.3A Pending CN108546874A (en) | 2018-04-28 | 2018-04-28 | Inexpensive HB400 grades of cut deal wear-resisting steel plate and manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108546874A (en) |
Citations (2)
| 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 |
-
2018
- 2018-04-28 CN CN201810398726.3A patent/CN108546874A/en active Pending
Patent Citations (2)
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100412223C (en) | Ultra-high strength steel with excellent corrosion resistance and fatigue resistance and its making process | |
| CN100443617C (en) | Pealite like thermal treating steel rail and producing method thereof | |
| CN109023119B (en) | Wear-resistant steel with excellent ductility and toughness and manufacturing method thereof | |
| CN1328406C (en) | Martensite wear resistant cast steel with film austenic toughened and its manufacturing method | |
| CN104480406A (en) | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof | |
| CN108315652B (en) | Inexpensive high-hardenability HB450 grades of cut deal wear-resisting steel plates and manufacturing method | |
| CN104388821B (en) | TiC particulate reinforcement type heterogeneous structure high-ductility wear-resisting steel plate and manufacture method | |
| CN104451403B (en) | Low temperature HB450 level heterogeneous structure abrasion-resistant stee and production method thereof | |
| CN102676922B (en) | Low-alloy wear-resistant steel and manufacturing method thereof | |
| CN110499474A (en) | High temperature resistant 400HB wear-resisting steel plate and its production method | |
| CN107937803A (en) | One kind has low-temperature impact toughness wear-resisting steel plate and preparation method thereof | |
| CN104357758A (en) | Ultra-hard particle-enhanced martensitic wear-resistant steel plate and manufacturing method thereof | |
| CN111500928B (en) | Low-temperature high-toughness high-temperature high-strength and high-hardenability hot die steel and preparation technology thereof | |
| CN104278216A (en) | Steel plate with thickness of larger than 60mm and yield strength of 690MPa and preparation method of steel plate | |
| CN102337455A (en) | High-toughness wear-resistant steel plate formed by rare earth through treatment | |
| CN106319389B (en) | The steel for engineering machinery and its manufacturing method of inexpensive, high machining property | |
| CN104962834A (en) | High-toughness stable-brinell-hardness extra-thick abrasion-resistant steel and preparation method thereof | |
| CN106756489A (en) | 450 grades of anti-crack high-strength abrasion-proof steels of Brinell hardness and its manufacture method | |
| CN106868420A (en) | One kind forging superhigh intensity low-alloy wear-resistant steel and preparation method thereof | |
| CN105002430A (en) | HB360 level complex-phase structure wear-resisting steel plate and production method thereof | |
| CN110628993A (en) | HB460 MPa-grade high-strength high-toughness fire-cut crack-resistant wear-resistant steel and production method thereof | |
| CN107287506A (en) | A kind of 650MPa grades of medium temperature and medium pressure boiler plate and its production method | |
| CN108060362A (en) | A kind of HB450 grades of anti-crack heterogeneous structure abrasion-resistant stee and its processing method | |
| CN107746935A (en) | A kind of high-strength abrasion-proof steel plate and its production technology | |
| CN103243277B (en) | A kind of HB400 level cracking resistance line high strength martensitic wear resisting steel and production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180918 |