CN109594074A - It is a kind of for laser manufacture without magnetic wear-resistant material - Google Patents
It is a kind of for laser manufacture without magnetic wear-resistant material Download PDFInfo
- Publication number
- CN109594074A CN109594074A CN201910088503.1A CN201910088503A CN109594074A CN 109594074 A CN109594074 A CN 109594074A CN 201910088503 A CN201910088503 A CN 201910088503A CN 109594074 A CN109594074 A CN 109594074A
- Authority
- CN
- China
- Prior art keywords
- laser
- resistant material
- magnetic
- wear
- powder
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention provides a kind of for laser manufacture without magnetic wear-resistant material, is grouped as by hard particles component and nonmagnetic powder end group: hard particles part is WC, and mass fraction is 8~15%；Nonmagnetic powder end is by 16~23.3%Ni, 0.8~1.5%Mo, 38~42.1%Cr, 2.7~5.6%Si, 8.5~11%Co, 4.7~7.2%Nb, surplus Fe composition.The optimization without magnetic wear-resistant material and laser melting and coating process provided through the invention, no magnetic mould steel is able to solve in use because of the problem of wear phenomenon is serious, mould steel service life is short, high production cost, this kind of technique, which prepares above-mentioned no magnetic wear-resistant material coating, will obtain superior hardness, wearability, significant extended service life, more low production cost.
Description
Technical field
The invention belongs to laser melting coating manufacturing field, be related to it is a kind of suitable for no magnetic mould steel reparation without magnetic wear-resistant material
Preparation and be directed to the laser melting and coating process of this kind of dusty material.
Background technique
With the fast development of China's magnetoelectricity industry, increase sharply for the demand of no magnetic mould steel.It is main without magnetic mould steel
Magnetic induction is not generated in high-intensity magnetic field for the press-moulding die of magnetic material and magnetic plastics, no-magnetism bearing and other requirements
Constitutional detail.Such as: middle-sized transformer inner magnetic screen, iron-core draw-board, coil folder, bolt magnetic flux leakage structure
Part；Lifting electromagnet sucker, magnetic plant are simplified, select case and iron remover；Special electric furnace liner, bell, electrode clamping plate
And electronics agitating device structural member；No magnetic is built, without fields such as magnetic mechanical, ore dressing mine detecting set and military affairs.But it applies at present
It is low without magnetic mould steel hardness, there are wear-out failures during military service it is serious, service life is short the problems such as.According to statistics, nearly 80%
Mould invalidation be as caused by wearing, as die life it is low and caused by steel consumption and energy waste, and to product matter
Amount is lost brought by influencing, and reaches upper 1,000,000,000 RMB every year, therefore die wear becomes the focal point of scholar and enterprise.Firmly
Matter particle enhances nonmagnetic powder end and prepares without magnetic wear-resistant coating outside reserved materials are nonmagnetic, can also greatly improve material wear-resistant
Property.
Mould steel fails generally since surface, can effectively improve its service life by surface strengthening technology.Common table
Face modification mode includes: thermo-chemical treatment, diffusion is penetrated into, ion implanting and vapor deposition, these modification modes can be mentioned effectively
High hot die steel surface property increases hot-work die service life.But there are long processing periods, and technical requirements are high, surface knot
The disadvantages of closing difference and relatively thin coating.
Laser Surface Modification Technology is to act on metal material surface by high-energy-density laser beam, is brought it about physico
Variation is learned, to change its wear-resisting, anti-corrosion, thermal fatigue resistance and the performances such as anti-oxidant.It has the following characteristics that high-energy density
Laser beam heats speed is exceedingly fast, and is quickly cooled down after material surface is heated, crystal grain is tiny；Smaller heat input make material surface deformation and
Heat affecting is small.Meanwhile laser surface modification also has that power is controllable, modification area may be selected and the characteristics such as pollution-free.It is vast
Surface protection researcher is pursued.
The present invention utilizes on the basis of preparation is without magnetic wear-resistant material, using laser melting and coating technique in no magnetic mold steel surface
Wear-resistant coating is prepared, the wearability and service life of product is greatly improved, reduces enterprise's manufacturing cost.
Summary of the invention
The purpose of the present invention is to solve no magnetic mould steel in use because wear phenomenon is serious, substantially shortens mould
The problem of having steel service life, increasing production cost.Invented it is a kind of suitable for laser manufacture without magnetic wear-resistant material, and provide
A kind of laser melting and coating process.Using this kind of technique prepare above-mentioned no magnetic wear-resistant material coating will obtain superior hardness,
Wearability, significant extended service life, more low production cost.
The purpose of the present invention is what is be achieved through the following technical solutions.
It is a kind of for laser manufacture without magnetic wear-resistant material, be grouped as by hard particles component and nonmagnetic powder end group: hard
Particle part is WC, and mass fraction is 8~15%；Nonmagnetic powder end is by 16~23.3% Ni, 0.8~1.5% Mo, 38~42.1%
Cr, 2.7~5.6% Si, 8.5~11% Co, 4.7~7.2% Nb, surplus Fe composition.
Wherein, 300 mesh of WC particle granularity, for each metal powder granularity between 150 ~ 300 mesh, purity is all larger than 99%.
Wherein, Ni can make steel obtain higher obdurability as the main alloy element of non-magnetic material, improve material
Some physics, mechanics and processing performance, and help to obtain good corrosion resistance and welding performance.Cr element is as time pivot
The addition of element makes alloy material have strong passivation ability, and antioxygenic property is prominent, also has good corrosion resisting property,
And Fe based alloy average atom magnetic moment can be reduced.Mo and Nb belong to paramagnetic metal, and the magnetic conductivity and remanent magnetism of itself are less,
But Mo influences Ni magnetic transformation curve significant, can reduce Ni average atom magnetic moment, reduce material Curie temperature, as Mo plus
Enter amount at 0.8~1.5%, optimal effect can be obtained at this time.The addition of Co element can properly increase WC particle in matrix
In wetability, improve adhesion strength, excessive Co will lead to alloy material toughness and intensity it is slightly worse, although more beneficial
It but is unfavorable to its wearability, therefore controlled 8.5~11% with machine additivity energy, content range and WC at this time
Synergistic effect is played, keeps the overall effect of alloy material more preferable.
A kind of laser melting and coating process without magnetic wear-resistant material suitable for laser manufacture, includes the following steps.
(1) dusty material choose and proportion: 16~23.3% Ni, 0.8~1.5% Mo, 38~42.1% Cr, 2.7~
5.6% Si, 8.5~11% Co, 4.7~7.2% Nb, surplus are that Fe(or more is mass fraction), and it is another in above-mentioned powder
8~15%WC particle is added to as reinforced phase.Wherein, 300 mesh of WC particle granularity, each metal powder granularity 150 ~ 300 mesh it
Between, purity is all larger than 99%.
(2) early-stage preparations and pretreatment: step (1) powder is uniformly mixed by mixed powder machine；Substrate surface is carried out clear
Clean, grinding process；The substrate handled well is heated to 250 DEG C.
(3) laser cladding technological parameter: laser power P=2.5Kw, cladding speed v=0.8m/min overlap 1.5mm, hot spot
Diameter 3.6mm, powder sending quantity 16g/min.
The beneficial effects of the present invention are.
Using the combination performance prepared by above-mentioned formula and corresponding laser melting and coating process without magnetic wear-resistant coating and matrix
For high-intensitive metallurgical bonding, either as mold overall performance promoted also or the reparation in serious wear region,
The aspect of performance such as magnetism, hardness, wearability are all excellent in.Service life improves four times or so than before after whole cladding, should
The application of kind formula and technique will be enterprise's saving great amount of cost.
Specific embodiment
It is described in detail below with reference to embodiment.
Embodiment 1.
(1) it is pre-processed to cladding sample with it.
Selection substrate be 304 magnetism-free stainless steels, chemical component (mass fraction): C≤0.08%, Si≤
1.0%, Mn≤2.0%, P≤0.045%, S≤0.03%, Ni8.00%~11.0%, Cr 18.0%~20.0%, surplus are
Fe.To by substrate surface through angle grinder polishing derust after, it is with acetone and dehydrated alcohol that its surface clean is clean.
(2) powder selection, configuration and processing.
Ingredient: 23%Ni, 1.2%Mo, 38%Cr, 2.7%Si, 11%Co, 7%Nb, surplus are that Fe(or more is mass fraction),
And 10%WC particle is separately added in above-mentioned powder as reinforced phase.Wherein, 300 mesh of WC particle granularity, each metal powder granularity
Between 150 ~ 300 mesh, purity is all larger than 99%.Configured powder is mixed 120 minutes through ball mill, dries 1 at 100 DEG C
Hour.
(3) laser melting coating is carried out after substrate being heated to 250 DEG C, is selected using high power continuous YAG laser as energy
Amount source, laser power P=2.5Kw, cladding speed v=0.8m/min overlap 1.5mm, spot diameter 3.6mm.Using lateral synchronous
Dust feeder, powder sending quantity 16g/min, protective gas are argon gas.
(4) by after coating polishing processing after cladding, performance detection is carried out.
The above test is observed using microhardness testers in the junction of laser cladding layer and substrate, finds wear-resistant coating
In conjunction with matrix preferably, substrate surface produces the melting zone of 0.6mm or so, and coating layer thickness reaches 1.0-1.2mm.Pass through flaw detection
Agent carries out penetrant inspection to sample, and all sample cladding layers do not occur slight crack.Do not find that slag inclusion, hole exist after cutting.It applies
Layer hardness 63HRC, wearability improve 6 times or so, and service life improves four times.
Embodiment 2.
(1) it is pre-processed to cladding sample with it.
Selecting substrate is 7Mn15Cr2Al3V2MoW without magnetic mould steel.To by substrate surface through angle grinder polishing derust after,
It is with acetone and dehydrated alcohol that its surface clean is clean.
(2) powder selection, configuration and processing.
Ingredient: 21%Ni, 0.9%Mo, 38%Cr, 3.1%Si, 9.7%Co, 5.6%Nb, surplus are that Fe(or more is quality point
Number), and 10%WC particle is separately added to as reinforced phase in above-mentioned powder.Wherein, 300 mesh of WC particle granularity, each metal powder
For granularity between 150 ~ 300 mesh, purity is all larger than 99%.Configured powder is mixed 120 minutes through ball mill, is dried at 100 DEG C
It is 1 hour dry.
(3) laser melting coating is carried out after substrate being heated to 250 DEG C, is selected using high power continuous YAG laser as energy
Amount source, laser power P=2.5Kw, cladding speed v=0.8m/min overlap 1.5mm, spot diameter 3.6mm.Using lateral synchronous
Dust feeder, powder sending quantity 16g/min, protective gas are argon gas.
(4) by after coating polishing processing after cladding, performance detection is carried out.
The above test is observed using microhardness testers in the junction of laser cladding layer and substrate, finds wear-resistant coating
In conjunction with matrix preferably, substrate surface produces the melting zone of 0.6mm or so, and coating layer thickness reaches 1.1mm.Pass through agent pair of detecting a flaw
Sample carries out penetrant inspection, and all sample cladding layers do not occur slight crack.Do not find that slag inclusion, hole exist after cutting.Coating is hard
58HRC is spent, wearability improves, and service life improves four times.
Above embodiment is intended merely to illustrate the purpose of the present invention, and is not used as limitation of the invention, as long as
In essential scope of the invention, the scope of the claims of the invention will all be fallen in variation, the modification of embodiment described above
It is interior.
Claims (4)
1. it is a kind of for laser manufacture without magnetic wear-resistant material, which is characterized in that collectively constituted by hard particles and nonmagnetic powder end:
Wherein hard particles are WC；Nonmagnetic powder end is made of Ni, Mo, Cr, Si, Co, Nb and Fe.
2. it is according to claim 1 it is a kind of for laser manufacture without magnetic wear-resistant material, which is characterized in that the matter of the WC
Measuring score is 8~15%；The nonmagnetic powder end is by 16~23.3% Ni, 0.8~1.5% Mo, 38~42.1% Cr, 2.7~5.6%
Si, 8.5~11% Co, 4.7~7.2% Nb, surplus Fe composition；The sum of each component mass percent is absolutely.
3. it is according to claim 1 it is a kind of for laser manufacture without magnetic wear-resistant material, which is characterized in that the WC particle
300 mesh of granularity, purity are greater than 99%；The Ni, Mo, Cr, Si, the powder size of Co, Nb and Fe between 150 ~ 300 mesh, it is pure
Degree is all larger than 99%.
4. a kind of laser melting and coating process without magnetic wear-resistant material suitable for laser manufacture, comprising the following steps:
(1) dusty material is chosen and is matched: 8~15%WC, 16~23.3% Ni, 0.8~1.5% Mo, 38~42.1% Cr, 2.7
~5.6% Si, 8.5~11% Co, 4.7~7.2% Nb, surplus Fe；
(2) early-stage preparations and pretreatment: step (1) powder is uniformly mixed by mixed powder machine；Substrate surface is cleaned, is beaten
Mill processing；The substrate handled well is heated to 250 DEG C；
(3) laser cladding technological parameter: laser power P=2.5Kw, cladding speed v=0.8m/min overlap 1.5mm, spot diameter
3.6mm, powder sending quantity 16g/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088503.1A CN109594074A (en) | 2019-01-30 | 2019-01-30 | It is a kind of for laser manufacture without magnetic wear-resistant material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088503.1A CN109594074A (en) | 2019-01-30 | 2019-01-30 | It is a kind of for laser manufacture without magnetic wear-resistant material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109594074A true CN109594074A (en) | 2019-04-09 |
Family
ID=65966995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910088503.1A Pending CN109594074A (en) | 2019-01-30 | 2019-01-30 | It is a kind of for laser manufacture without magnetic wear-resistant material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109594074A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE526191C2 (en) * | 2003-12-19 | 2005-07-26 | Sandvik Ab | Egg-provided tools and methods for making them |
| CN104372339A (en) * | 2014-12-03 | 2015-02-25 | 江苏新亚模具机械有限公司 | Laser strengthening method of non-magnetic die |
-
2019
- 2019-01-30 CN CN201910088503.1A patent/CN109594074A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE526191C2 (en) * | 2003-12-19 | 2005-07-26 | Sandvik Ab | Egg-provided tools and methods for making them |
| CN104372339A (en) * | 2014-12-03 | 2015-02-25 | 江苏新亚模具机械有限公司 | Laser strengthening method of non-magnetic die |
Non-Patent Citations (1)
| Title |
|---|
| 丁彰雄等: "《船舶机械修理工艺学》", 28 February 2013, 武汉理工大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yang et al. | Effect of remelting on microstructure and magnetic properties of Fe-Co-based alloys produced by laser additive manufacturing | |
| Qi et al. | Effect of magnetic field on crack control of Co-based alloy laser cladding | |
| CN110157977A (en) | A kind of laser remanufacturing reparation iron(-)base powder and the preparation method and application thereof | |
| CN113832461B (en) | Nickel-based alloy powder for laser cladding, ceramic particle reinforced composite powder and application | |
| CN109097708A (en) | A method of improving single-phase high-entropy alloy surface property | |
| CN111850544A (en) | High-entropy alloy coating and preparation method thereof | |
| Liang et al. | Microstructures and wear resistance of AlCrFeNi 2 W 0.2 Nb x high-entropy alloy coatings prepared by laser cladding | |
| CN114150203B (en) | Laser cladding in-situ self-generated high-entropy alloy gradient coating and preparation method thereof | |
| CN106378519B (en) | A kind of iron-based cladding layer alloy powder material of high heat-intensity and cladding layer preparation method | |
| CN109396429A (en) | A kind of improvement laser gain material manufacture structural alloy steel microstructure and mechanical property method | |
| CN112030068A (en) | Laser cladding iron-based alloy powder and preparation method and application thereof | |
| CN112548094B (en) | 30Cr15MoY alloy steel powder for laser additive manufacturing or remanufacturing and using method thereof | |
| CN109576604A (en) | A kind of impact-resistant abrasion-proof material for laser manufacture | |
| CN112695316B (en) | Laser cladding coating and preparation method thereof | |
| Yin et al. | Effect of nano-Y 2 O 3 on microstructure and crack formation in laser direct-deposited in situ particle-reinforced Fe-based coatings | |
| CN109594074A (en) | It is a kind of for laser manufacture without magnetic wear-resistant material | |
| Wei et al. | Preparation of TA15 powder reinforced 45CrNiMoY alloy steel with high mechanical property by pre-laid laser cladding technology | |
| CN100451151C (en) | Rare earth appended surfacing alloy and surfacing technique for preparation of aluminium matrix composite material | |
| WO2021103120A1 (en) | Plasma cladded metal coating with high wear resistance and corrosion resistance and preparation method therefor | |
| CN106086592A (en) | A kind of preparation method of the wear-resisting iron and steel of carbide oriented growth | |
| Liang et al. | Microstructure and Properties of 2Cr13-x Mo Stainless Steels Fabricated by Direct Laser Deposition | |
| Xu et al. | Mechanical and magnetic properties of (Ti, W) C–xCoCrFeNiMo cermets sintered at different sintering temperatures | |
| Wang et al. | Plasma Cladding Current Optimization of FeCoCrMn HEA Coating and the Effect of Shot Peening | |
| Peng et al. | Microstructural development and wear properties analyses of Fe-based coatings on bainitic steel by laser cladding | |
| Ma et al. | Wear resistance of laser cladding Fe50Cr40Si10 coating on AISI 1045 steel in elevated temperature |
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: 20190409 |