CN102586716A - Wear-resistant metal ceramic coating for strengthening hot work die steel surface and preparation method thereof - Google Patents
Wear-resistant metal ceramic coating for strengthening hot work die steel surface and preparation method thereof Download PDFInfo
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- CN102586716A CN102586716A CN2012100993231A CN201210099323A CN102586716A CN 102586716 A CN102586716 A CN 102586716A CN 2012100993231 A CN2012100993231 A CN 2012100993231A CN 201210099323 A CN201210099323 A CN 201210099323A CN 102586716 A CN102586716 A CN 102586716A
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Abstract
The invention discloses a ternary boride metal ceramic coating prepared on the surface of die steel, and a process of the ternary boride metal ceramic coating. A plasma spraying process is adopted aiming at failure modes of hot work die steel in working process. The plasma spraying process adopts a plasma spraying device and a synchronous automatic powder feeding device; a plasma electric arc driven by direct current is taken as a heat source; a prepared powder material is heated to be at a fusing state or a semi-fusing state, and is sprayed to the surface of the pre-treated workpiece at a high speed; when the plasma electric arc is moved, the fixedly-attached coating is formed on the surface of the die steel; and after the post-stage thermal treatment, the coating has good wear-resistant performance and heat-fatigue-resistance performance, so that the service life of the workpiece can be prolonged by one time or above.
Description
Technical field
The present invention relates to a kind of metal-ceramic coating and preparation method thereof, more particularly, relate to metal-ceramic coating that is used for the surface of hot die steel reinforcement and preparation method thereof.
Background technology
The fast development of Iron And Steel Industry is increasingly high to the ferrous materials performance demands; Traditional steel are because performances such as its hardness, wear resistance, heat shock resistance are poor; Can not satisfy the demand of Industrial products; And sintering metal has obtained attention gradually because of having performances such as good hardness, wear resistance and erosion resistance.
Hot-work die steel contacts with hot metallographic phase when work, and the mold cavity surface temperature is up to 400～600 ℃, and high like this temperature can make cavity surface hardness and intensity significantly reduce.And metal with the die cavity relative movement, can produce the intensive wearing and tearing to mould under the effect of huge stress, tension stress, stress in bending and shock load.Receive the alternating action of heat-eliminating medium cooling and hot METAL HEATING PROCESS in the mold work process repeatedly; Thermal wear and thermal fatigue are the mould main form of invalidation, and this just requires the die steel surface to have high firmness, good wear resistance, dimensional stability, red hardness, thermal fatigue resistance and comprehensive mechanical property.Seeing that the inefficacy of hot-work die is mostly begun by the surface; From saving the energy and resource; Giving full play to the material property potentiality and obtain property and maximum economic benefit sets out, the die steel mould is carried out surface modification treatment, is the key of comprehensively improving the plug working life.Coating technology is as the important means of material surface technology; Being intended to material with minute quantity plays a large amount of, expensive integral material and plays; Simultaneously greatly reduce the cost of product, improve the quality of products, increase the service life, economize on resources and the purpose of the energy thereby reach.Therefore, selecting suitable process method to prepare certain thickness wear-resisting, metal-ceramic coating that thermal fatigue resistance is good at the working-surface of steel, is the current problem that needs to be resolved hurrily.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art,, provide a kind of in die steel surface preparation ternary boride cement coating and technology thereof to hot-work die steel failure mode in the course of the work.
The object of the invention is achieved through following technical proposals:
To hot-work die steel failure mode in the course of the work, through research improvement repeatedly, provide a kind of in die steel surface preparation ternary boride cement coating, adopt plasma spray coating process.This plasma spraying process using plasma spraying equipment and synchronous automatic powder feeding device as thermal source, are heated to fusion or semi-melting state with the powder formulated material by the plasma arc of direct-current drive; And to spray at a high speed through pretreated workpiece surface; After plasma arc is removed, form the coating (it is thick for example can to reach 1～2mm) of adhere firmly on the die steel surface, through later stage thermal treatment; Make coating have better wear resistance, thermal fatigue resistance; Finally make workpiece improve 1 times or more than the several times work-ing life, specifically, can be undertaken by following step:
(be that step 1) is carried out thermal pretreatment to the die steel matrix at first; In order to guarantee the needed hardness of steel matrix; Prevent in the course of processing, to produce distortion, matrix is quenched and the tempered thermal pretreatment, the thermal pretreatment technology that can adapt with it according to the performance selection of different die steel.
Secondly (being step 2) clears up and mechanical workout the working lining surface, the greasy dirt (for example ethanol, acetone etc.) on optional solvent removal steel matrix surface, and the working lining to steel matrix adopts polishing or sandblasting again.
Step 3, carry out plasma spraying processing, its Chemical Composition of the dusty spray of employing is by mass percentage: FeB:10-12%, Mo:16-18%, Ni:0.5-1%, Cr:0.5-1%, C:0.2-0.5%, surplus are the Fe powder; Being preferably FeB:10-12%, Mo:16-18%, Ni:0.5-0.8%, Cr:0.8-1%, C:0.2-0.5%, surplus is the Fe powder; The powder feeding rate of adjusting the automatic powder feeding device simultaneously satisfies the coating needs.
(step 4) is carried out subsequent heat treatment, and the product after the article on plasma spraying carries out vacuum sintering to be handled, and changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying, and temperature is 1100-1200 ℃, and the stress relief annealing time is 30min～60min at last; Be preferably 1140-1200 ℃, the stress relief annealing time is 30min～40min; Be more preferably 1150-1200 ℃, the stress relief annealing time is 30min～40min.
Plasma spraying processing and automatic powder feeding technological parameters of device such as table 1:
Processing of table 1 plasma spraying and automatic powder feeding technological parameters of device
| Processing parameter | Parameter is selected |
| Plasma gas | Ar gas |
| Powder feeding gas flow/Lmin -1 | 5-7 |
| Power/the kw of electric arc | 31.5～35 |
| Spray distance/mm | 80-110 |
What the present invention adopted is plasma spraying technology; Utilize plasma jet with depositing materials be heated to the fusing or near melted state; Spray is attached to the method that forms resist on the product surface, and have various advantages: (1) part does not have distortion, does not change the thermal treatment character of matrix metal.Therefore, can implement spraying to some High Strength Steels and thin-walled parts, thin and long units; (2) kind of coating is many.The temperature of plasma flame flow is high, can various spray material be heated to molten state, thereby can use the material of plasma spraying very extensive, thereby also can obtain the sprayed coating of multiple performance; (3) process stabilizing, coating quality is high.Select the method for plasma spraying to make powdered alloy and matrix produce fine and close metallurgical binding thus; Because the metallurgical binding behind the plasma spraying can not make the binary ferrous alloy transform fully; So carry out subsequent heat treatment, make the binary ferrous alloy be converted into ternary boride cement (shown in accompanying drawing 1).
Principle of the present invention is through the fabulous iron(-)base powder of wear resistance at elevated temperature, utilizes the process means of plasma spraying, makes powdered alloy and matrix produce firmly fine and close metallurgical binding; Then through the reaction in sintering process; Product is carried out subsequent heat treatment, finally on matrix, form coating (thickness can the reach) 1～2mm of thermal fatigue resistance, heat resistanceheat resistant wearing and tearing, thereby improve plug work-ing life; Thereby boost productivity, reduce production costs.Compared with prior art, advantage of the present invention is: (1) plasma spraying makes powdered alloy form firm metallurgical binding, the coating even compact in semi-melting or molten state and steel matrix; (2) adopt product to replace the die steel that traditional clean steel is made, improved the work-ing life and the hardness (shown in accompanying drawing 2) of mould with ternary boride coating; Characteristics such as (3) technology of the present invention is radiationless, easy to operate, productivity is high, yield rate is high and comprehensive cost is low; (4) the present invention can extensively apply to surface of hot die steel and prepares the reparation of metal-ceramic coating and make, also can repair for the crackle that die surface occurs.
Description of drawings
Fig. 1 H13 steel matrix behind the plasma spraying with subsequent heat treatment after XRD spectra (Japanese company of science produces D/MAX-2500 type X-ray diffractometer).
Before the pre-treatment of Fig. 2 H13 steel matrix, after the pre-treatment of H13 steel matrix, behind the plasma spraying, the Vickers' hardness comparison diagram (MH-6 microhardness tester) of subsequent heat treatment (1160 ℃) and subsequent heat treatment (1200 ℃).
The SEM photo of Fig. 3 H13 steel matrix polishing scratch (sem S4800, Hitachi, Japan).
Fig. 4 behind the plasma spraying through subsequent heat treatment (1200 ℃) after, the SEM photo of H13 steel matrix polishing scratch (sem S4800, Hitachi, Japan).
Embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment.With the H13 steel is example, and the H13 steel is the hot-work die steel that is in daily use.
(1) H13 steel matrix preheating place
In order to guarantee the needed hardness of H13 steel matrix, prevent in the course of processing, to produce distortion, the H13 steel matrix is quenched and tempered thermal treatment.Quenching temperature is 1050 ℃, and the quenching mode is a water-cooled; Tempering temperature is 570 ℃, air cooling.
(2) working lining surface-conditioning and mechanical workout
With the greasy dirt of etoh solvent removing matrix surface, to the working lining employing polishing or the sandblasting of matrix.
(3) plasma spraying processing
Adopt the plasma spraying powder, its Chemical Composition is by mass percentage: FeB:11.11%, Mo:17.59%, Ni:1%, Cr:1%, C:0.5%, surplus are the Fe powder.Regulate the powder feeding rate of automatic powder feeding device, to satisfy the needed powder feeding rate of coat-thickness, plasma spraying processing and automatic powder feeding technological parameters of device are following:
Powder feeding gas flow: 5L/min
Plasma gas: Ar gas
The power of electric arc: 35kW
Spray distance: 110mm
(4) subsequent heat treatment
Product in tube furnace after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1160 ℃, and stress relief annealing 30min changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
(1) H13 steel matrix preheating place
In order to guarantee the needed hardness of H13 steel matrix, prevent in the course of processing, to produce distortion, the H13 steel matrix is quenched and tempered thermal treatment.Quenching temperature is 1050 ℃, and the quenching mode is a water-cooled; Tempering temperature is 570 ℃, air cooling.
(2) working lining surface-conditioning and mechanical workout
With the greasy dirt of solvent acetone removing matrix surface, to the working lining employing polishing or the sandblasting of matrix.
(3) plasma spraying processing
Adopt the plasma spraying powder; Its Chemical Composition is by mass percentage: FeB:11.11%, Mo:17.59%, Ni:1%, Cr:1%, C:0.5%, surplus are the Fe powder; Regulate the powder feeding rate of automatic powder feeding device; To satisfy the needed powder feeding rate of coat-thickness, plasma spraying processing and automatic powder feeding technological parameters of device:
Powder feeding gas flow: 7L/min
Plasma gas: Ar gas
The power of electric arc: 35kW
Spray distance: 80mm
(4) subsequent heat treatment
Product in tube furnace after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1200 ℃, and stress relief annealing 30min changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
Embodiment 3
(1) H13 steel matrix preheating place
In order to guarantee the needed hardness of H13 steel matrix, prevent in the course of processing, to produce distortion, the H13 steel matrix is quenched and tempered thermal treatment.Quenching temperature is 1050 ℃, and the quenching mode is a water-cooled; Tempering temperature is 570 ℃, air cooling.
(2) working lining surface-conditioning and mechanical workout
With the greasy dirt of solvent acetone removing matrix surface, to the working lining employing polishing or the sandblasting of matrix.
(3) plasma spraying processing
Adopt the plasma spraying powder; Its Chemical Composition is by mass percentage: FeB:10%, Mo:16%, Ni:0.5%, Cr:1%, C:0.5%, surplus are the Fe powder; Regulate the powder feeding rate of automatic powder feeding device; To satisfy the needed powder feeding rate of coat-thickness, plasma spraying processing and automatic powder feeding technological parameters of device:
Powder feeding gas flow: 7L/min
Plasma gas: Ar gas
The power of electric arc: 31kW
Spray distance: 100mm
(4) subsequent heat treatment
Product in tube furnace after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1100 ℃, and stress relief annealing 60min changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
Embodiment 4
(1) H13 steel matrix preheating place
In order to guarantee the needed hardness of H13 steel matrix, prevent in the course of processing, to produce distortion, the H13 steel matrix is quenched and tempered thermal treatment.Quenching temperature is 1050 ℃, and the quenching mode is a water-cooled; Tempering temperature is 570 ℃, air cooling.
(2) working lining surface-conditioning and mechanical workout
With the greasy dirt of solvent acetone removing matrix surface, to the working lining employing polishing or the sandblasting of matrix.
(3) plasma spraying processing
Adopt the plasma spraying powder; Its Chemical Composition is by mass percentage: FeB:12%, Mo:18%, Ni:1%, Cr:1%, C:0.2%, surplus are the Fe powder; Regulate the powder feeding rate of automatic powder feeding device; To satisfy the needed powder feeding rate of coat-thickness, plasma spraying processing and automatic powder feeding technological parameters of device:
Powder feeding gas flow: 6L/min
Plasma gas: Ar gas
The power of electric arc: 35kW
Spray distance: 110mm
(4) subsequent heat treatment
Product in tube furnace after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1150 ℃, and stress relief annealing 40min changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
Embodiment 5
(1) H13 steel matrix preheating place
In order to guarantee the needed hardness of H13 steel matrix, prevent in the course of processing, to produce distortion, the H13 steel matrix is quenched and tempered thermal treatment.Quenching temperature is 1050 ℃, and the quenching mode is a water-cooled; Tempering temperature is 570 ℃, air cooling.
(2) working lining surface-conditioning and mechanical workout
With the greasy dirt of solvent acetone removing matrix surface, to the working lining employing polishing or the sandblasting of matrix.
(3) plasma spraying processing
Adopt the plasma spraying powder; Its Chemical Composition is by mass percentage: FeB:11%, Mo:17%, Ni:0.8%, Cr:0.5%, C:0.4%, surplus are the Fe powder; Regulate the powder feeding rate of automatic powder feeding device; To satisfy the needed powder feeding rate of coat-thickness, plasma spraying processing and automatic powder feeding technological parameters of device:
Powder feeding gas flow: 7L/min
Plasma gas: Ar gas
The power of electric arc: 32kW
Spray distance: 90mm
(4) subsequent heat treatment
Product in tube furnace after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1180 ℃, and stress relief annealing 45min changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
Embodiment 6
(1) H13 steel matrix preheating place
In order to guarantee the needed hardness of H13 steel matrix, prevent in the course of processing, to produce distortion, the H13 steel matrix is quenched and tempered thermal treatment.Quenching temperature is 1050 ℃, and the quenching mode is a water-cooled; Tempering temperature is 570 ℃, air cooling.
(2) working lining surface-conditioning and mechanical workout
With the greasy dirt of etoh solvent removing matrix surface, to the working lining employing polishing or the sandblasting of matrix.
(3) plasma spraying processing
Adopt the plasma spraying powder; Its Chemical Composition is by mass percentage: FeB:11%, Mo:16.5%, Ni:1%, Cr:0.8%, C:0.4%, surplus are the Fe powder; Regulate the powder feeding rate of automatic powder feeding device; To satisfy the needed powder feeding rate of coat-thickness, plasma spraying processing and automatic powder feeding technological parameters of device:
Powder feeding gas flow: 6L/min
Plasma gas: Ar gas
The power of electric arc: 35kW
Spray distance: 80mm
(4) subsequent heat treatment
Product in tube furnace after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1140 ℃, and stress relief annealing 50min changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
The frictional behaviour test is carried out on MG-2000 type high-speed and high-temperature friction wear testing machine; To behind the matrix after the thermal pretreatment, the plasma spraying, three samples of plasma spraying+subsequent heat treatment (1200 ℃) carry out wear-resisting comparative experimental research (three specimen codings are respectively A, B, C); Wearing-in period is 20min, test result such as following table 2:
The wear results of sample under table 2 condition of the same race
The pattern that SEM photo through the wearing and tearing shown in accompanying drawing 3 and 4 shows can know that untreated H13 steel matrix pattern after wearing and tearing has shown that wear surface mainly demonstrates the ditch dug with a plow pattern; And behind the plasma spraying through subsequent heat treatment (1200 ℃) after, H13 steel matrix polishing scratch surface topography is typical adhesive wear, microcosmic plough wrinkle and cavity.
More than the present invention has been done exemplary description; Should be noted that; Under the situation that does not break away from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (10)
1. one kind is used for the wear-proof metal ceramic coating that surface of hot die steel is strengthened, and it is characterized in that, prepares according to following step:
Step (1) is carried out thermal pretreatment to the die steel matrix, prevents in the course of processing, to produce distortion;
Step (2) is cleared up and mechanical workout the working lining surface;
Step (3) is carried out plasma spraying processing, and its Chemical Composition of the dusty spray of employing is by mass percentage: FeB:10-12%, Mo:16-18%, Ni:0.5-1%, Cr:0.5-1%, C:0.2-0.5%, surplus are the Fe powder; As thermal source, the powder formulated material is heated to fusion or semi-melting state by the plasma arc of direct-current drive, and to spray to through pretreated workpiece surface at a high speed, the powder feeding rate of adjusting the automatic powder feeding device simultaneously satisfies the coating needs;
Step (4) is carried out subsequent heat treatment, and the product after the article on plasma spraying carries out vacuum sintering to be handled, and changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
2. a kind of wear-proof metal ceramic coating that surface of hot die steel is strengthened that is used for according to claim 1; It is characterized in that; In the said step (2), can select for use ethanol or acetone to remove the greasy dirt on steel matrix surface, the working lining to steel matrix adopts polishing or sandblasting again.
3. a kind of wear-proof metal ceramic coating that surface of hot die steel is strengthened that is used for according to claim 1; It is characterized in that; In the said step (3), its Chemical Composition of the dusty spray of employing is preferably by mass percentage: FeB:10-12%, Mo:16-18%, Ni:0.5-0.8%, Cr:0.8-1%, C:0.2-0.5%, surplus are the Fe powder.
4. a kind of wear-proof metal ceramic coating that surface of hot die steel is strengthened that is used for according to claim 1; It is characterized in that; In the said step (3), plasma spraying processing and automatic powder feeding technological parameters of device are: plasma gas is that Ar gas, powder feeding gas flow are 5-7Lmin
-1, electric arc power be that 31～35kw, spray distance are 80-110mm.
5. a kind of wear-proof metal ceramic coating that surface of hot die steel is strengthened that is used for according to claim 1; It is characterized in that in the said step (4), the product after the article on plasma spraying carries out vacuum sintering to be handled; Temperature is 1100-1200 ℃, and the stress relief annealing time is 30min～60min; Be preferably 1140-1200 ℃, the stress relief annealing time is 30min～40min; Be more preferably 1150-1200 ℃, the stress relief annealing time is 30min～40min.
6. a preparation method who is used for the wear-proof metal ceramic coating of surface of hot die steel reinforcement is characterized in that, carries out according to following step:
Step (1) is carried out thermal pretreatment to the die steel matrix, prevents in the course of processing, to produce distortion;
Step (2) is cleared up and mechanical workout the working lining surface;
Step (3) is carried out plasma spraying processing, and its Chemical Composition of the dusty spray of employing is by mass percentage: FeB:10-12%, Mo:16-18%, Ni:0.5-1%, Cr:0.5-1%, C:0.2-0.5%, surplus are the Fe powder; As thermal source, the powder formulated material is heated to fusion or semi-melting state by the plasma arc of direct-current drive, and to spray to through pretreated workpiece surface at a high speed, the powder feeding rate of adjusting the automatic powder feeding device simultaneously satisfies the coating needs;
Step (4) is carried out subsequent heat treatment, and the product after the article on plasma spraying carries out vacuum sintering to be handled, and changes the back unrelieved stress with coating and matrix behind the minimizing plasma spraying.
7. a kind of preparation method who is used for the wear-proof metal ceramic coating of surface of hot die steel reinforcement according to claim 6; It is characterized in that; In the said step (2), can select for use ethanol or acetone to remove the greasy dirt on steel matrix surface, the working lining to steel matrix adopts polishing or sandblasting again.
8. a kind of preparation method who is used for the wear-proof metal ceramic coating of surface of hot die steel reinforcement according to claim 6; It is characterized in that; In the said step (3), its Chemical Composition of the dusty spray of employing is preferably by mass percentage: FeB:10-12%, Mo:16-18%, Ni:0.5-0.8%, Cr:0.8-1%, C:0.2-0.5%, surplus are the Fe powder.
9. a kind of preparation method who is used for the wear-proof metal ceramic coating of surface of hot die steel reinforcement according to claim 6; It is characterized in that; In the said step (3), plasma spraying processing and automatic powder feeding technological parameters of device are: plasma gas is that Ar gas, powder feeding gas flow are 5-7Lmin
-1, electric arc power be that 31～35kw, spray distance are 80-110mm.
10. a kind of preparation method who is used for the wear-proof metal ceramic coating of surface of hot die steel reinforcement according to claim 6; It is characterized in that; In the said step (4); Product after the article on plasma spraying carries out vacuum sintering to be handled, and temperature is 1100-1200 ℃, and the stress relief annealing time is 30min～60min; Be preferably 1140-1200 ℃, the stress relief annealing time is 30min～40min; Be more preferably 1150-1200 ℃, the stress relief annealing time is 30min～40min.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264092A (en) * | 2014-09-04 | 2015-01-07 | 天津大学 | Preparation method of Mo2FeB2-base metal ceramic coating applied to surface of die steel |
| CN104624825A (en) * | 2014-12-17 | 2015-05-20 | 南京航空航天大学 | Submerged-arc welding straight welded pipe diameter expansion outer fan-shaped block for deep sea and surface protection method thereof |
| CN105420661A (en) * | 2015-11-20 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing dimension of GH4169 part through plasma spraying of NiCrFeMo coating |
| CN107914005A (en) * | 2016-10-08 | 2018-04-17 | 北京联合涂层技术有限公司 | A kind of preparation method of the wear-resisting fusion materials of high B |
| CN109927215A (en) * | 2019-04-04 | 2019-06-25 | 滁州益佳模具设备制造有限公司 | A kind of surface treatment method of foaming mould |
| CN110629154A (en) * | 2019-10-29 | 2019-12-31 | 江西省科学院应用物理研究所 | Preparation method of FeCrMnBC-based economic wear-resistant corrosion-resistant coating |
| CN111763900A (en) * | 2020-06-12 | 2020-10-13 | 嘉兴市爵拓科技有限公司 | Mixture for hot work die coating and preparation method of hot work die coated with nano coating |
| CN113173694A (en) * | 2021-03-26 | 2021-07-27 | 曲面超精密光电(深圳)有限公司 | Manufacturing method of vehicle-mounted curved glass cover plate thermal forming die |
| CN113832427A (en) * | 2021-09-16 | 2021-12-24 | 无锡市新达共创纳米科技有限公司 | Plasma spraying method for refractory brick mold surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264092A (en) * | 2014-09-04 | 2015-01-07 | 天津大学 | Preparation method of Mo2FeB2-base metal ceramic coating applied to surface of die steel |
| CN104624825A (en) * | 2014-12-17 | 2015-05-20 | 南京航空航天大学 | Submerged-arc welding straight welded pipe diameter expansion outer fan-shaped block for deep sea and surface protection method thereof |
| CN105420661A (en) * | 2015-11-20 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing dimension of GH4169 part through plasma spraying of NiCrFeMo coating |
| CN107914005A (en) * | 2016-10-08 | 2018-04-17 | 北京联合涂层技术有限公司 | A kind of preparation method of the wear-resisting fusion materials of high B |
| CN109927215A (en) * | 2019-04-04 | 2019-06-25 | 滁州益佳模具设备制造有限公司 | A kind of surface treatment method of foaming mould |
| CN110629154A (en) * | 2019-10-29 | 2019-12-31 | 江西省科学院应用物理研究所 | Preparation method of FeCrMnBC-based economic wear-resistant corrosion-resistant coating |
| CN111763900A (en) * | 2020-06-12 | 2020-10-13 | 嘉兴市爵拓科技有限公司 | Mixture for hot work die coating and preparation method of hot work die coated with nano coating |
| CN113173694A (en) * | 2021-03-26 | 2021-07-27 | 曲面超精密光电(深圳)有限公司 | Manufacturing method of vehicle-mounted curved glass cover plate thermal forming die |
| CN113832427A (en) * | 2021-09-16 | 2021-12-24 | 无锡市新达共创纳米科技有限公司 | Plasma spraying method for refractory brick mold surface |
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Application publication date: 20120718 |