CN105779867A - Free-cutting wear-resisting steel plate and manufacturing method thereof - Google Patents
Free-cutting wear-resisting steel plate and manufacturing method thereof Download PDFInfo
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- CN105779867A CN105779867A CN201610136448.5A CN201610136448A CN105779867A CN 105779867 A CN105779867 A CN 105779867A CN 201610136448 A CN201610136448 A CN 201610136448A CN 105779867 A CN105779867 A CN 105779867A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C22C38/06—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical 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 free-cutting wear-resisting steel plate and a manufacturing method thereof. The free-cutting wear-resisting steel plate comprises, by mass percent, 0.25%-0.32% of C, 0.15%-0.45% of Si, 1.00%-1.30% of Mn, not larger than 0.025% of P, 0.010%-0.020% of S, 0.012%-0.040% of Ti, 0.25%-0.50% of Cr, 0.0005%-0.0030% of B, 0.010%-0.040% of Al, not larger than 0.004% of N, not larger than 0.003% of O, not larger than 0.0002% of H and the balance Fe and unavoidable impurities; the contents of the Ti and the N meet the condition that Ti/N is equal to 3 to 8; and the contents of the P and the S meet the condition that the sum of the P and the S is smaller than or equal to 0.040%. According to the free-cutting wear-resisting steel plate, through scientific and reasonable design of alloy components, the product is subject to quenching and tempering after rolling is carried out, the thickness of the manufactured wear-resisting steel plate ranges from 8 mm to 70 mm, the Brinell hardness HBW ranges from 430 to 520, and the strength of extension is larger than 1350 MPa; the process is simple, the cost is low, the product hardness is high, the intensity is high, and cutting is easy; and in particular, the industrial problems that the hardness and the intensity are high, and machining is difficult are solved. The free-cutting wear-resisting steel plate can be widely applied to products such as engineering machine blade plates which have the requirements of being high in hardness, high in intensity and easy to cut.
Description
Technical field
The invention belongs to steel plate technical field of smelting, in particular it relates to a kind of Cutting free wear-resisting steel plate and
Preparation method.
Background technology
Wear-resisting steel plate be widely used in high-wear resistance engineering, dig up mine, build, manufacture of cement, harbour, electric power
And on the engineering goods such as metallurgy, such as mine dump truck, bull-dozer, loading machine, excavator, dumper and various
Mining machinery, grab bucket, stacker-reclaimer, conveying warp architecture etc..Current domestic and international existing wear-resisting steel plate product, especially
It is the wear-resisting steel plate that HBW430-520 hardness is interval, only has the feature that intensity is high, hardness is high, and this is the most straight
Connect and cause this series products to directly result in machining difficulty in use greatly, cause Product processing cost high, no simultaneously
It is beneficial to extensively application.
It is known that the machinability of usual steel is with the increasing and increase of sulfur content in steel, also judge cutting of steel with this
Cut processing complexity.Before making the present invention, the application of Wuyang Iron And Steel Co., Ltd " a kind of high-strength abrasion-proof steel plate and
Its preparation method " Chinese patent application (publication number CN101451220A), this steel hardness HBW360-440 it
Between, for NM400 rank, less than hardness HBW430-520；Add the noble elements such as Ni, Nb, V simultaneously,
Manufacturing cost is high；This steel S≤0.010%, machining difficulty is big.
" a kind of low-alloy high-strength high-toughness wear-resistant steel plate and the preparation side thereof of Baoshan Iron & Steel Co., Ltd's application
Method " Chinese patent (publication number CN101775545A), although this steel hardness is not less than HBW450, but chemistry becomes
Dividing and with the addition of expensive alloying elements Mo and Nb, this allows for production cost and is greatly increased；This steel S ＜ 0.010% simultaneously,
It is clear that the raising of hardness and intensity only focused on by this steel, have ignored cutting and processing characteristics.
" a kind of low-carbon low-alloy abrasion-resistant steel and production method thereof " Chinese patent of Angang Stock Co., Ltd's application is (public
The number of opening CN102021492A), although this steel Brinell hardness ＞ HB400, but in chemical composition containing Ni, Nb,
The elements such as Mo, belong to precious metal, and production cost can be caused significantly to raise.This steel S≤0.010% simultaneously, aobvious
And be clear to, the raising of hardness and intensity the most only focused on by this steel, have ignored cutting and processing characteristics.
" a kind of high-grade wear-resistant steel plate and production method thereof " Chinese patent of Wuyang Iron & Steel Co., Ltd.'s application
(publication number CN101748346A), although this steel Brinell hardness is between 445HBW-485HBW, but this steel
Chemical composition Ni content is 0.10-0.30%, and this element belongs to precious alloy, and production cost is high.This steel simultaneously
S≤0.005%, it is therefore apparent that the raising of hardness and intensity the most only focused on by this steel, is degrading machinability
Energy.
Summary of the invention
For the above-mentioned deficiency of prior art, it is an object of the present invention to provide a kind of Cutting free wear-resisting steel plate,
Meeting user to thickness between 8-70mm, between Brinell hardness 430-520 of surface, tensile strength is at 1350MPa
The needs that above high-strength abrasion-proof steel plate Cutting free is easily processed.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
A kind of Cutting free wear-resisting steel plate, by mass percentage, the chemical composition of described wear-resisting steel plate is:
C:0.25-0.32%, Si:0.15-0.45%, Mn:1.00-1.30%, P≤0.025%, S:0.010-0.020%,
Ti:0.012-0.040%, Cr:0.25-0.50%, B:0.0005-0.0030%, Al:0.010-0.040%, N≤0.004%,
O≤0.003%, H≤0.0002%, remaining is Fe and being inevitably mingled with, wherein Ti and N content meet Ti/N=3～
8；P and S content meets P+S≤0.040%, in order to ensure the cutting ability S content under the conditions of high strength and high hardness
0.015C+0.0011Mn+0.022Cr+1.3B≤S≤0.04C+0.0021Mn+0.013Cr+0.09B should be met.
Described steel plate thickness between 8-70mm, Brinell hardness between HBW430-520, tensile strength is more than
1350MPa。
Present invention also offers the preparation method of a kind of Cutting free wear-resisting steel plate, the method includes:
1) smelting process: by first passing through desulfurizing iron containing the molten steel of each element, send converter smelting, be re-fed into LF
Refining furnace refines, and can take to add sulphur iron or feeding sulphur line adjusts sulfur content, after refining, carry out vacuum outgas
Stove (RH stove) application of vacuum；
2) casting process: by step 1) process after molten steel send conticaster, continuous casting uses omnidistance argon shield casting,
Inner Quality of Billet, the casting degree of superheat control within 30 DEG C to use soft reduction technique to guarantee；
3) heating technique: slab heating temperature is 1160～1220 DEG C, heats the reference time and presses 8-10min/cm plate
Base thickness is to ensure that steel billet burns even grilling thoroughly, and soaking time is no less than 60min, rolls after heating；
4) rolling mill practice: utilize wide and heavy plate mill to complete two-phase control rolling, rough rolling step carries out >=1000 DEG C complete
Recrystallization rolls.Finish rolling stage start rolling temperature controls at 880-980 DEG C, is controlled cooling, final cooling temperature control after rolling
Steel plate, between 150-660 DEG C, after steel plate cooling, is aligned by system depending on plate shape situation, rectifys temperature >=450 DEG C eventually；
5) Technology for Heating Processing: quenching temperature is 880-940 DEG C, the stove inside holding time is 10-25min, steel plate
Shrend after heating, temperature is 150-350 DEG C, temperature retention time 15-25min, air cooling after insulation.
Present component design principle:
(1) carbon C is element most basic in steel, can improve intensity and the hardness of steel, and then improve the wear-resisting of steel
Property, due to the present invention primarily to obtain the martensite wear resistant steel of good quenching degree, but higher carbon content is to steel
Toughness and welding performance unfavorable.Therefore, the scientific and reasonable carbon content that must control in steel is 0.25-0.32%, at this
In the range of, along with the increase of carbon content, intensity and hardness etc. increase the most accordingly；
(2) silicon Si is present in austenite with the form of solid solution, improves the intensity of solid solution in steel, thus improves
The anti-wear performance of steel, but silicone content is too high will significantly reduce the plasticity of steel, toughness and ductility.Simultaneously take account of silicon
Stronger than iron with the affinity of oxygen, easily produce the silicate of low melting point during welding, increase slag and the stream of fusing metal
Dynamic property, affects weldquality, therefore strictly to control the content of silicon, and controlling silicone content in the present invention is 0.15-0.45%；
(3) manganese Mn and iron form solid solution and can improve (steel hard of ferrite and the hardness of austenite and intensity in steel
Spend to improve with Fe content and ramp), strongly increase the quenching degree of steel, be easy to get after quenching martensitic structure.By
Invigoration effect in manganese makes matrix and carbide be strengthened, thus improves intensity and the hardness of steel, but Mn was
Heat sensitivity element, during quenching, the too high meeting of heating-up temperature causes coarse grains.Mn segregation coefficient when solidification is relatively big,
It is easy to, at Grain Boundary Segregation, the performance of steel be had a negative impact, and remained austenite content in quenching structure can be caused
Increasing, Plate Welding performance can be adversely affected by Fe content height simultaneously.Therefore, the present invention controls Fe content and is
1.00-1.30%；
(4), when phosphorus P content in steel is higher, Fe is formed2P separates out around crystal grain, reduce steel plasticity and
Toughness, therefore general control is within 0.025%, within preferred 0.015%；
(5) sulphur S forms manganese sulfide inclusion with manganese and iron in steel, and this type impurity can interrupt the continuous of parent metal
Property, promote when cutting chip breaking to form little and short crimp radius, and be prone to get rid of, reduce tool wear, reduce
Machined surface roughness, improves cutter life, it is achieved Cutting free.Generally the machinability of steel is with sulfur content in steel
Increase and increase.But when sulfur content is too high in steel, can cause red brittleness, the hot-working to steel causes difficulty, deteriorate
The mechanical property of steel.Therefore, the present invention controls sulfur content is 0.010-0.020%；
(6) titanium Ti can with crystal grain thinning, improve toughness, TiN undissolved property at high temperature stops welding heat affected
The roughening of district's crystal grain, improves the toughness of heat affected area, thus improves the welding performance of abrasion-resistant stee, but Ti content is too much
Can occur that in casting process liquid separates out, strand produce bulky grain TiN, deteriorates the integrated performance index of steel.
Therefore, in the present invention, Ti content controls at 0.012-0.040%；
(7) chromium Cr is conducive to solution strengthening the formation of suitable carbide of steel, improves the elevated temperature strength of steel, hard
Degree and anti-wear performance.Cr can increase the quenching degree of steel, especially reasonably combined with Mn, Si, can significantly improve through hardening
Property, but also can increase steel belt roof bolt fragility tendency simultaneously.Therefore, the present invention controls chromium content is 0.25-0.50%；
(8) boron can increase the quenching degree of steel, but too high levels will cause hot-short phenomenon, affects the hot-workability of steel
Can, Boron contents of the present invention controls 0.0005～0.0030%；
(9) aluminium Al adds in steel as deoxidier, or is mingled with oxygen formation oxide, or dissolves in iron, or and N
Form aluminium nitride.Al forms the infusible compound of small and dispersed distribution in steel and crystal grain can be hindered to grow up with other element,
Play Grain refinement.But as too much by aluminum amount during deoxidation, the graphitization tendency of steel will be promoted, simultaneously when containing
When aluminium is higher, elevated temperature strength and the toughness of steel are relatively low.It is 0.010-0.040% that the present invention controls aluminium content；
(10) nitrogen N is element important in steel, certain owing to the most all containing in raw material during steel-making
The nitrogen element of amount, N too much in steel can have some residual after being all combined with the Ti in steel, and this part is unnecessary
" dissociating " nitrogen be disadvantageous to the performance especially weldability of steel, therefore, the content of nitrogen controls within 0.004%.
(11) oxygen O is harmful element in steel, easily causes hot-short, therefore the content of oxygen of the present invention controls 0.003%
Within；
(12) hydrogen H is harmful element in steel, easily causes hydrogen embrittlement, therefore the content of hydrogen of the present invention controls 0.0002%
Within；
In order to better meet user, the Cutting free of wear-resisting steel plate especially HBW430-520 rank wear-resisting steel plate is processed
Performance requirement, the invention discloses a kind of Cutting free wear-resisting steel plate and preparation method thereof, and this product and production technology are filled out
Mend domestic and international blank, meet the industry issue that tradition wear-resisting steel plate processing cutting difficulty is big.
The present invention is by the scientific and reasonable design to alloying component, and product adds temper through quenching after rolling, prepared
Wear-resisting steel plate thickness is between 8-70mm, and Brinell hardness is between HBW430-520, and tensile strength is more than
1350MPa, technique is simple, low cost, and product hardness is high, intensity is high and is prone to cutting, especially solves hardness
High intensity is high-leveled and difficult in an industry difficult problem for processing.Can be widely applied to add requiring that hardness is high, intensity high, be prone to cutting
On the products such as the engineering machinery knife edge board of work.
It is an advantage of the current invention that:
Use suitable carbon content, suitable inexpensive alloy elements Si and Mn, add less Cr, Mo, Nb and
B element, without elements such as Ni, Cu, V, strict Ti/N value and the S content in steel thereof of controlling, present invention product
Product rolling after through quenching+tempering process make thickness wear-resisting steel plate hardness between 8-70mm reach HBW430-520,
Tensile strength reaches more than 1350MPa, especially meets this wear-resisting steel plate Cutting free processing request.
Detailed description of the invention
Below in conjunction with embodiment, Cutting free wear-resisting steel plate of the present invention and preparation method thereof is described in detail.
Thering is provided thickness between 8-70mm for realizing the present invention, hardness is HBW430-520, tensile strength reaches
The other wear-resisting steel plate of 1350MPa higher level, the in particular up to purpose of Cutting free processing.The present invention is as shown in table 1
Chemical composition carries out converter smelting, it is especially desirable to can take to add sulphur iron when LF refining furnace refines or feeding sulphur line is adjusted
Whole sulfur content.After refining, carry out vacuum degassing furnace (RH stove) application of vacuum and pour into continuous casting billet, will be even
At Heavy Plate Rolling Line mill milling after strand heating, steel plate is quenched and temper after rolling.
Embodiment of the present invention 1-4 chemical composition is shown in Table 1.Slab heating temperature, finishing temperature, quenching temperature,
The main technologic parameters such as temperature are shown in Table 2.Corresponding surface of steel plate Brinell hardness, thickness specification are listed the most in table 2.
The chemical composition (wt.%) of table 1 embodiment of the present invention 1-4 Cutting free wear-resisting steel plate
Table 2 embodiment of the present invention 1-4 Cutting free wear-resisting steel plate main production parameter and hardness number
By embodiment 1-4 it can be seen that require institute according to present component design, rolling mill practice and Technology for Heating Processing
The wear-resisting steel plate produced, has technique simple, low cost, and product hardness is high and is prone to cutting, especially solves hard
Degree high intensity is high-leveled and difficult in an industry difficult problem for processing.Achieve Brinell hardness HBW430-520, tensile strength reaches
The manufacture of more than 1350MPa rank wear-resisting steel plate, has better met the need that this series products Cutting free is processed by user
Ask, use the product specification manufactured by production technology of the present invention to be particularly suitable for requiring that hardness is high, intensity is high, easily
In all kinds of engineering mechanical device knife edge boards of machining, such as: loading machine knife edge board, bulldozer perching knife sword plate etc.
Deng.
The interval bound value of the technological parameter (such as temperature, time etc.) of the present invention and interval value can realize this
Method, embodiment numerous to list herein.
It should be noted last that, above example is only in order to illustrate technical scheme and unrestricted.Although
With reference to embodiment, the present invention is described in detail, it will be apparent to an ordinarily skilled person in the art that the present invention
Technical scheme modify or equivalent, without departure from the spirit and scope of technical solution of the present invention, it is equal
Should contain in the middle of scope of the presently claimed invention.
Claims (4)
1. a Cutting free wear-resisting steel plate, it is characterised in that by percentage to the quality, the chemical composition of described steel plate
Comprise: C:0.25-0.32%, Si:0.15-0.45%, Mn:1.00-1.30%, P≤0.025%, S:0.010-0.020%,
Ti:0.012-0.040%, Cr:0.25-0.50%, B:0.0005-0.0030%, Al:0.010-0.040%, N≤0.004%,
O≤0.003%, H≤0.0002%, remaining is Fe and being inevitably mingled with, wherein Ti and N content meet Ti/N=3～
8；P and S content meets P+S≤0.040%.
Cutting free wear-resisting steel plate the most according to claim 1, it is characterised in that S content should meet
0.015C+0.0011Mn+0.022Cr+1.3B≤S≤0.04C+0.0021Mn+0.013Cr+0.09B。
Cutting free wear-resisting steel plate the most according to claim 1, it is characterised in that described wear-resisting steel plate thickness
Between 8-70mm, Brinell hardness is between HBW430-520, and tensile strength is more than 1350MPa.
4. a preparation method for Cutting free wear-resisting steel plate as claimed in claim 1, said method comprising the steps of:
1) smelt: by first passing through desulfurizing iron containing the molten steel of each element, send converter smelting, be re-fed into LF refining
Stove refines, and adds sulphur iron or feeding sulphur line adjusts sulfur content, after refining, carry out vacuum degassing furnace application of vacuum；
2) casting: by step 1) process after molten steel send conticaster, continuous casting uses omnidistance argon shield casting, adopts
Guarantee that Inner Quality of Billet, the casting degree of superheat control within 30 DEG C with soft reduction technique；
3) heating: slab heating temperature is 1160～1220 DEG C, heats the reference time and presses 8-10min/cm to ensure
Steel billet burns even grilling thoroughly, and soaking time is no less than 60min, rolls after heating；
4) rolling: utilize wide and heavy plate mill to complete two-phase control rolling, rough rolling step carries out >=1000 DEG C tie the most again
Brilliant rolling, finish rolling stage start rolling temperature controls at 880-980 DEG C, is controlled cooling after rolling, and final cooling temperature controls
Between 150-660 DEG C, after steel plate cooling, depending on plate shape situation, steel plate is aligned, rectify temperature >=450 DEG C eventually；
5) being heat-treated: quenching temperature is 880-940 DEG C, and the stove inside holding time is 10-25min, steel plate heats
Rear shrend, temperature is 150-350 DEG C, temperature retention time 15-25min, air cooling after insulation.
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| CN201610136448.5A CN105779867B (en) | 2016-03-10 | 2016-03-10 | A kind of Cutting free wear-resisting steel plate and preparation method thereof |
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| CN201610136448.5A CN105779867B (en) | 2016-03-10 | 2016-03-10 | A kind of Cutting free wear-resisting steel plate and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555109A (en) * | 2016-10-31 | 2017-04-05 | 舞阳钢铁有限责任公司 | Have low temperature impact properties NM550 steel plates and its production method concurrently |
| CN107217202A (en) * | 2017-07-19 | 2017-09-29 | 武汉钢铁有限公司 | The abrasion-resistant stee and its manufacture method of a kind of 500 grades of Brinell hardness |
| CN107723601A (en) * | 2017-11-01 | 2018-02-23 | 山东钢铁股份有限公司 | A kind of residual stress is 50 100MPa wear-resisting steel plate and preparation method thereof |
| CN108660374A (en) * | 2018-05-23 | 2018-10-16 | 山东钢铁股份有限公司 | A kind of quenching aligning short route wear-resisting steel plate and preparation method thereof |
| CN109778073A (en) * | 2019-02-20 | 2019-05-21 | 宝钢特钢长材有限公司 | A kind of Cutting free automobile synchronizer steel and preparation method thereof |
| CN111004973A (en) * | 2019-12-21 | 2020-04-14 | 邯郸钢铁集团有限责任公司 | Low-alloy medium-carbon wear-resistant steel for low-cost ball mill lining plate and production method thereof |
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| CN104294161A (en) * | 2014-10-31 | 2015-01-21 | 武汉钢铁(集团)公司 | High-temperature-resistant free-cutting high-strength steel |
| CN104480406A (en) * | 2014-11-28 | 2015-04-01 | 宝山钢铁股份有限公司 | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof |
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| CN101880830A (en) * | 2010-07-09 | 2010-11-10 | 武汉钢铁(集团)公司 | Steel with Brinell hardness of 430-470 for cutting edge and production method thereof |
| CN104294161A (en) * | 2014-10-31 | 2015-01-21 | 武汉钢铁(集团)公司 | High-temperature-resistant free-cutting high-strength steel |
| CN104480406A (en) * | 2014-11-28 | 2015-04-01 | 宝山钢铁股份有限公司 | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555109A (en) * | 2016-10-31 | 2017-04-05 | 舞阳钢铁有限责任公司 | Have low temperature impact properties NM550 steel plates and its production method concurrently |
| CN107217202A (en) * | 2017-07-19 | 2017-09-29 | 武汉钢铁有限公司 | The abrasion-resistant stee and its manufacture method of a kind of 500 grades of Brinell hardness |
| CN107723601A (en) * | 2017-11-01 | 2018-02-23 | 山东钢铁股份有限公司 | A kind of residual stress is 50 100MPa wear-resisting steel plate and preparation method thereof |
| CN108660374A (en) * | 2018-05-23 | 2018-10-16 | 山东钢铁股份有限公司 | A kind of quenching aligning short route wear-resisting steel plate and preparation method thereof |
| CN109778073A (en) * | 2019-02-20 | 2019-05-21 | 宝钢特钢长材有限公司 | A kind of Cutting free automobile synchronizer steel and preparation method thereof |
| CN111004973A (en) * | 2019-12-21 | 2020-04-14 | 邯郸钢铁集团有限责任公司 | Low-alloy medium-carbon wear-resistant steel for low-cost ball mill lining plate and production method thereof |
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| Publication number | Publication date |
|---|---|
| CN105779867B (en) | 2017-08-25 |
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Effective date of registration: 20210716 Address after: 271104 Shuangquan Road, Gangcheng District, Jinan City, Shandong Province Patentee after: LAIGANG GROUP YINSHAN SHAPED STEEL Co.,Ltd. Address before: 271104 No.99, Fuqian street, Gangcheng District, Laiwu City, Shandong Province Patentee before: SHANDONG IRON AND STEEL Co.,Ltd. |