CN106283036A - A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface - Google Patents
A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface Download PDFInfo
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- CN106283036A CN106283036A CN201610695749.1A CN201610695749A CN106283036A CN 106283036 A CN106283036 A CN 106283036A CN 201610695749 A CN201610695749 A CN 201610695749A CN 106283036 A CN106283036 A CN 106283036A
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- 238000000576 coating method Methods 0.000 title claims abstract description 39
- 239000011248 coating agent Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 59
- 230000008018 melting Effects 0.000 claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 238000002844 melting Methods 0.000 claims abstract description 23
- 238000005253 cladding Methods 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000011812 mixed powder Substances 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 229910000521 B alloy Inorganic materials 0.000 claims description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 235000012054 meals Nutrition 0.000 claims description 3
- 238000010309 melting process Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 3
- 238000004372 laser cladding Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 239000011159 matrix material Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000004040 coloring Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 formed Fine uniform Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- B22F1/0003—
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/08—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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface.Including Roll Collar surface preparation；The preparation of composite hard alloy powder；Laser melting coating: send into Roll Collar surface, by laser melting and coating technique cladding on Roll Collar surface by mixed-powder step 2 made.Present invention process has the excellent composite hard alloy powder of heat resistanceheat resistant, anti-wear performance as functional material, the process of application laser melting coating will have the alloy powder cladding equably of performance of well having strong resistance to heat and hard wearing on the surface of roller, form that fine uniform, layer depth be controlled, high-quality and matrix form the hardstanding of good metallurgical binding, are remarkably improved the wearability of Roll Collar and the ability of thermal fatigue resistance.
Description
Technical field
The invention belongs to Roll Collar technical field, particularly relate to a kind of by laser melting and coating technique on Roll Collar surface
The method preparing wear-resisting heat resistanceheat resistant coating.
Background technology
The equipment dress of the steel rolling that Roll Collar mainly guides, auxiliary rolls blank or finished product runs through, is iron and steel
Parts the most crucial on factory's bar and wire rod rolling line, it is desirable to there is warm wearability relatively, only metallurgy industry
Need to consume all kinds of roll material about 2,000,000 tons China's year, and performance is difficult to meet requirement, therefore, annual flower multi-billion dollar is from state
How outer import, therefore, reduce its cost, improve its performance, become the main contents of future studies.
The main Roll Collar material used has: austenitic heat-resistance steel, martensite heat-resistant steel and hard alloy etc. three
Kind.Due to steel bonded carbide existing hard alloy high elastic modulus, high rigidity and the advantage of high-wearing feature, there is again alloy tool
Steel machinable and can the feature such as heat treatment, for cold working mould achieved with significant techno-economic effect.
Summary of the invention
It is an object of the invention to provide a kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface, swash by using
Light melting and coating technique carries out surface and increases the processing technology of material the surface of Roll Collar, and the process of application laser melting coating will have good
The cladding equably of the alloy powder of performance of having strong resistance to heat and hard wearing well, on the surface of roller, improves wearability and the energy of thermal fatigue resistance of Roll Collar
Power.
For solving above-mentioned technical problem, the present invention is achieved by the following technical solutions:
The present invention is a kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface, comprises the steps:
Step one, Roll Collar surface preparation: under room temperature, guide and guard surface is carried out oil removing, processing of rust removing, and visits with coloring
It is tested by method of hindering, it is desirable to surface flawless, pore, inclusion defect；
Step 2, the preparation of composite hard alloy powder:
A iron(-)base powder chemical composition: Fe, C, Cr, Ni, Mn, Mo, Si, N, Nb, Ta, B；Its chemical analysis is by weight
Percentage ratio is: C1.2-1.8%, Cr3.5-4.5%, Ni0.5-1.5%, Mn0.5-0.9%, Mo0.15-0.25%, Si0.5-
0.7, N0.1-0.2%, Nb0.05-0.1%, Ta0.05-0.08%, B0.1-0.21%, surplus is Fe；
B alloy powdered ingredients: titanium carbide powder, WC powder；
C non-metal powder: ceramic powders；
The proportioning of D composite hard alloy powder is A iron(-)base powder 40%-60%；B alloy powder 25%-
35%；Surplus is C non-metal powder；
Powder according to D step proportioning is carried out mixing 4-10 hour by meal mixer by E；
Step 3, laser melting coating: send into Roll Collar surface by mixed-powder step 2 made, pass through laser melting coating
Technology cladding is on Roll Collar surface.
Further, described step 3, laser melting coating: send into Roll Collar table by mixed-powder step 2 made
Face, by laser melting and coating technique cladding in Roll Collar surface；By regulation automatic powder feeding device, make automatic powder feeding head out
Alloy powder just falls in laser molten pool, regulates powder sending quantity, makes the thickness of alloy powder coating reach 0.8-2mm；Select
3.5*1mm broadband integral mirror, and regulate defocusing amount and make focussed laser spot be rectangle, spot size: long * width=(3.5-4.5) *
(2.5-3.5)mm。
Further, described laser melting coating selects DL-HL-T5000 type CO2 laser instrument, and workbench is SIMENS numerical control
Laser machine, uses synchronous powder feeding system device that alloy powder is automatically fed into laser molten pool, forms uniformly cause on Roll Collar surface
Close laser cladding layer；
Melting and coating process parameter is as follows:
Laser power P=3000～4000W, focusing rectangle spot size: long * width=(3.5-4.5) * (2.5-3.5) mm,
Scan velocity V=300-600mm/min, overlapping rate 40～60%, coating layer thickness: 0.8-2mm.
The method have the advantages that
1, the laser melting and coating technique used in the present invention carries out surface and increases the processing technology of material the surface of Roll Collar, permissible
Roll Collar after damaging is carried out surface reconditioning, with the structure improved.
2, the technique of the present invention has the excellent composite hard alloy powder of heat resistanceheat resistant, anti-wear performance as functional material, should
To there is the alloy powder cladding equably of performance of well having strong resistance to heat and hard wearing on the surface of roller by the process of laser melting coating, formed
Fine uniform, layer depth are controlled, high-quality and matrix form the hardstanding of good metallurgical binding, are remarkably improved Roll Collar
Wearability and the ability of thermal fatigue resistance.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface, comprises the steps:
Step one, Roll Collar surface preparation: under room temperature, guide and guard surface is carried out oil removing, processing of rust removing, and visits with coloring
It is tested by method of hindering, it is desirable to surface flawless, pore, inclusion defect；
Step 2, the preparation of composite hard alloy powder:
A iron(-)base powder chemical composition: Fe, C, Cr, Ni, Mn, Mo, Si, N, Nb, Ta, B；Its chemical analysis is by weight
Percentage ratio is: C1.2-1.8%, Cr3.5-4.5%, Ni0.5-1.5%, Mn0.5-0.9%, Mo0.15-0.25%, Si0.5-
0.7, N0.1-0.2%, Nb0.05-0.1%, Ta0.05-0.08%, B0.1-0.21%, surplus is Fe；
B alloy powdered ingredients: titanium carbide powder, WC powder；
C non-metal powder: ceramic powders；
The proportioning of D composite hard alloy powder is A iron(-)base powder 40%-60%；B alloy powder 25%-
35%；Surplus is C non-metal powder；
Powder according to D step proportioning is carried out mixing 4-10 hour by meal mixer by E；
Step 3, laser melting coating: send into Roll Collar surface by mixed-powder step 2 made, pass through laser melting coating
Technology cladding is on Roll Collar surface.
Wherein, step 3, laser melting coating: send into Roll Collar surface by mixed-powder step 2 made, by swashing
Light melting and coating technique cladding is in Roll Collar surface；By regulation automatic powder feeding device, make automatic powder feeding head alloy powder out
Just fall in laser molten pool, regulate powder sending quantity, make the thickness of alloy powder coating reach 0.8-2mm；Select 3.5*1mm broadband
Integral mirror, and regulate defocusing amount and make focussed laser spot be rectangle, spot size: long * width=(3.5-4.5) * (2.5-3.5)
mm。
Wherein, laser melting coating selects DL-HL-T5000 type CO2 laser instrument, and workbench is the processing of SIMENS digital control laser
Machine, uses synchronous powder feeding system device that alloy powder is automatically fed into laser molten pool, forms the laser of even compact on Roll Collar surface
Cladding layer；
Melting and coating process parameter is as follows:
Laser power P=3000～4000W, focusing rectangle spot size: long * width=(3.5-4.5) * (2.5-3.5) mm,
Scan velocity V=300-600mm/min, overlapping rate 40～60%, coating layer thickness: 0.8-2mm.
In the description of this specification, the description of reference term " embodiment ", " example ", " concrete example " etc. means
Specific features, structure, material or feature in conjunction with this embodiment or example description is contained at least one enforcement of the present invention
In example or example.In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.
And, the specific features of description, structure, material or feature can be to close in any one or more embodiments or example
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.Preferred embodiment is the most detailed
Describe all of details, be also not intended to the detailed description of the invention that this invention is only described.Obviously, according to the content of this specification,
Can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is to preferably explain the present invention
Principle and actual application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and four corner thereof and equivalent.
Claims (3)
1. the method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface, it is characterised in that comprise the steps:
Step one, Roll Collar surface preparation: under room temperature, guide and guard surface is carried out oil removing, processing of rust removing, and use Dye inspectiong
It is tested, it is desirable to surface flawless, pore, inclusion defect；
Step 2, the preparation of composite hard alloy powder:
A iron(-)base powder chemical composition: Fe, C, Cr, Ni, Mn, Mo, Si, N, Nb, Ta, B；Its chemical analysis percentage by weight
Ratio is: C1.2-1.8%, Cr3.5-4.5%, Ni0.5-1.5%, Mn0.5-0.9%, Mo0.15-0.25%, Si0.5-0.7,
N0.1-0.2%, Nb0.05-0.1%, Ta0.05-0.08%, B0.1-0.21%, surplus is Fe；
B alloy powdered ingredients: titanium carbide powder, WC powder；
C non-metal powder: ceramic powders；
The proportioning of D composite hard alloy powder is A iron(-)base powder 40%-60%；B alloy powder 25%-35%；Remaining
Amount is C non-metal powder；
Powder according to D step proportioning is carried out mixing 4-10 hour by meal mixer by E；
Step 3, laser melting coating: send into Roll Collar surface by mixed-powder step 2 made, pass through laser melting and coating technique
Cladding is on Roll Collar surface.
A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface the most according to claim 1, it is characterised in that institute
State step 3, laser melting coating: send into Roll Collar surface by mixed-powder step 2 made, melted by laser melting and coating technique
Overlay in Roll Collar surface；
By regulation automatic powder feeding device, making automatic powder feeding head alloy powder out just fall in laser molten pool, regulation is sent
Powder amount, makes the thickness of alloy powder coating reach 0.8-2mm；
Select 3.5*1mm broadband integral mirror, and regulate defocusing amount and make focussed laser spot be rectangle, spot size: long * width=
(3.5-4.5)*(2.5-3.5)mm。
A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface the most according to claim 1, it is characterised in that institute
Stating laser melting coating and select DL-HL-T5000 type CO2 laser instrument, workbench is SIMENS CNC laser processing machine, uses and synchronizes
Alloy powder is automatically fed into laser molten pool by dust feeder, forms the laser cladding layer of even compact on Roll Collar surface；
Melting and coating process parameter is as follows:
Laser power P=3000～4000W,
Focusing rectangle spot size: long * width=(3.5-4.5) * (2.5-3.5) mm,
Scan velocity V=300-600mm/min,
Overlapping rate 40～60%,
Coating layer thickness: 0.8-2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695749.1A CN106283036A (en) | 2016-08-19 | 2016-08-19 | A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695749.1A CN106283036A (en) | 2016-08-19 | 2016-08-19 | A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface |
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| CN106283036A true CN106283036A (en) | 2017-01-04 |
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| CN201610695749.1A Pending CN106283036A (en) | 2016-08-19 | 2016-08-19 | A kind of method preparing wear-resisting heat resistanceheat resistant coating on Roll Collar surface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906401A (en) * | 2017-03-04 | 2017-06-30 | 丹阳嘉伟耐磨材料科技有限公司 | A kind of heat-resisting base steel WC40 steel bonded carbide Roll Collar and its manufacture method |
| CN107686939A (en) * | 2017-07-11 | 2018-02-13 | 芜湖锐华暖通科技有限公司 | A kind of Wear-resistant, high-temperature resistant power supply box shell and preparation method thereof |
| CN109048199A (en) * | 2018-09-18 | 2018-12-21 | 湖南红宇耐磨新材料股份有限公司 | A kind of restorative procedure of universal rolling mill guide and guard |
| CN112122559A (en) * | 2020-09-24 | 2020-12-25 | 安徽中科春谷激光产业技术研究院有限公司 | Novel composite material guide for seamless steel pipe threading line |
| CN113549915A (en) * | 2021-06-16 | 2021-10-26 | 太原理工大学 | Wear-resistant composite coating for toothed rail of mining scraper conveyor and preparation method thereof |
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| CN104250805A (en) * | 2013-06-28 | 2014-12-31 | 沈阳大陆激光成套设备有限公司 | Method for preparing wear-resistant heat-resistant coating through laser cladding of surface of guide roller by bar rolling mill |
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| CN101505910A (en) * | 2006-08-09 | 2009-08-12 | Ing商事株式会社 | Iron-based corrosion resistant wear resistant alloy and deposit welding material for obtaining the alloy |
| CN104250805A (en) * | 2013-06-28 | 2014-12-31 | 沈阳大陆激光成套设备有限公司 | Method for preparing wear-resistant heat-resistant coating through laser cladding of surface of guide roller by bar rolling mill |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906401A (en) * | 2017-03-04 | 2017-06-30 | 丹阳嘉伟耐磨材料科技有限公司 | A kind of heat-resisting base steel WC40 steel bonded carbide Roll Collar and its manufacture method |
| CN107686939A (en) * | 2017-07-11 | 2018-02-13 | 芜湖锐华暖通科技有限公司 | A kind of Wear-resistant, high-temperature resistant power supply box shell and preparation method thereof |
| CN109048199A (en) * | 2018-09-18 | 2018-12-21 | 湖南红宇耐磨新材料股份有限公司 | A kind of restorative procedure of universal rolling mill guide and guard |
| CN112122559A (en) * | 2020-09-24 | 2020-12-25 | 安徽中科春谷激光产业技术研究院有限公司 | Novel composite material guide for seamless steel pipe threading line |
| CN112122559B (en) * | 2020-09-24 | 2021-11-09 | 安徽中科春谷激光产业技术研究院有限公司 | Novel composite material guide for seamless steel pipe threading line |
| CN113549915A (en) * | 2021-06-16 | 2021-10-26 | 太原理工大学 | Wear-resistant composite coating for toothed rail of mining scraper conveyor and preparation method thereof |
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Application publication date: 20170104 |