CN104911586A - Method for cladding tungsten carbide coating on surface of metal substrate - Google Patents
Method for cladding tungsten carbide coating on surface of metal substrate Download PDFInfo
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- CN104911586A CN104911586A CN201510390117.XA CN201510390117A CN104911586A CN 104911586 A CN104911586 A CN 104911586A CN 201510390117 A CN201510390117 A CN 201510390117A CN 104911586 A CN104911586 A CN 104911586A
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Abstract
The invention relates to a method for cladding a tungsten carbide coating on the surface of a metal substrate. The method includes the steps: adding film-forming agents after tungsten carbide powder and special metal alloy powder are uniformly mixed, and rolling the powder into a flat cloth shape to obtain a tungsten carbide alloy coating; adhering the tungsten carbide alloy coating on the surface of the metal substrate by the aid of adhesives or a mechanical clamping method; fusing and sintering the metal substrate with the tungsten carbide alloy coating in a vacuum furnace, cooling the fused and sintered metal substrate by air, and performing subsequent heat treatment. Compared with the prior art, by the aid of tungsten carbide ceramic particles, alloy materials such as a nickel base and a cobalt base are enhanced and serve as the coating fused and sintered on the surface of the metal substrate, the tungsten carbide alloy coating is made on the surface of the metal substrate, the hardness of the surface is improved, and abrasion resistance and corrosion resistance of the substrate are improved. The method is simple in process and applicable to metal parts in complex shapes.
Description
Technical field
The invention belongs to material surface engineering field, especially relate to a kind of method at metallic substrate surface cladding wolfram varbide coating.
Background technology
In the daily life and industrial production in modern times, the use of metallic substance is in occupation of critical role, but in the life-time service of component of machine and engineering component, the abrasion and corrosion of metallic substance can seriously cause its disabler, brings hidden danger to life and production.Corrosion will cause a large amount of losses of metallic element material, wearing and tearing then cause crack initiation, the mutually bonding etc. of important moving parts in machine applications, become one of principal mode of motion component inefficacy, while consumable material, waste ample resources, cause very serious financial loss.Particles reiforced metal-base composition is as the metal-base composites of a kind of high-performance, low cost, for a long time, people are from practical application, large quantity research is carried out to tungsten carbide material, especially certain achievement is achieved to the research of its High Temperature Tribological Behavior, be considered to the metalloid based composites that range of application is the widest, development and application prospect is maximum, external at present for industries such as Aeronautics and Astronautics, ordnance, automobile, agricultural machinery, electronics, physical culture.
Chinese patent CN 101054670A discloses a kind of method utilizing laser melting coating high-hardness tungsten carbide coating on the metal surface.First by preparation meso-hole structure hollow ball-shape tungsten-carbide powder and optical absorbing agent Homogeneous phase mixing, and as preset coating coated materials in metal matrix material on the surface, then control suitable condition by laser melting coating, obtain described high-hardness tungsten carbide coating.The method technique that this invention proposes is simple, controls easy, the wolfram varbide cladding layer hardness obtained is high, high abrasion resistance, and under high rigidity, there will not be crackle, cladding layer good toughness.But this patent complex surface and inner chamber rete shaping in be very limited, need special frock, cannot realize even at all.
Summary of the invention
Object of the present invention is exactly to be overcome in the surface engineering technologies such as thermospray, plasma spraying, PVD and CVD the thickness and continuous film forming problem that are difficult to overcome, and proposes a kind of method at metallic substrate surface cladding wolfram varbide coating.
The present invention prepares wolfram varbide by premolding and strengthens specialty metal lamella, be attached to metallic substrate surface, fuse shaping, for metallic substrate surface covers hard protective layer, strengthen wear-resistant and corrosion resistance nature, improve the work-ing life of metal base part under serious abrasive wear and corrosive conditions condition.
Object of the present invention can be achieved through the following technical solutions:
In a method for metallic substrate surface cladding wolfram varbide coating, comprise the following steps:
(1) carbon tungsten alloy coating film forming in advance: after tungsten-carbide powder and exotic metal alloys powder are mixed, add membrane-forming agent, and roll compacting is become flat cloth-like, obtain carbon tungsten alloy coating, the thickness of this carbon tungsten alloy coating determines the thickness of the wolfram varbide coating of metallic substrate surface cladding;
(2) use sizing agent or use mechanical grip method that carbon tungsten alloy coating is bonded at metallic substrate surface;
(3) metal base with carbon tungsten alloy coating is fused at vacuum oven, the organism comprising sizing agent and membrane-forming agent is removed, powdered alloy fusion bonded forming simultaneously, fastening cladded wolfram carbide particle, coating and metal base form metallurgical binding by solid solution diffusion layer, have fused rear air cooling;
(4) subsequent heat treatment is carried out to the metal base after step (3) process.
In step (1), described exotic metal alloys powder comprises Ni-based and cobalt base alloy.
In step (1), wolfram varbide weight percent controls 55% ~ 80%, and exotic metal alloys powder weight controls 45% ~ 20%.
In step (1), described membrane-forming agent comprises tetrafluoroethylene, paraffin or rosin.
In step (1), the add-on of described membrane-forming agent accounts for 1% ~ 10% of tungsten-carbide powder and exotic metal alloys powder gross weight, is preferably less than 5%.
In step (3), consider the situations such as the removing of membrane-forming agent, the thermal treatment restriction of metallic substance, the welding of film material, while the welding of guarantee rete, also carrying out smoothly of subsequent heat treatment operation is ensured, therefore setting fuses process curve and is: temperature rise rate 3-10 DEG C/min, to 300-450 DEG C, and be incubated 3 ~ 5 hours, then 700-900 DEG C is warming up to the temperature rise speed of 3-10 DEG C/min, then 900 DEG C ~ 1280 DEG C are warming up to the heat-up rate of 2-6 DEG C/min, insulation 3-15min, then stops heating, cools to less than 200 DEG C with the furnace.
Subsequent heat treatment described in step (4) according to the material of metal base different from select different thermal treatment process.When described metal base is No. 45 steel, the subsequent heat treatment technique described in step (4) is: adopt shrend, quenching temperature 840 DEG C, then high tempering 560 DEG C, and then insulation 1h comes out of the stove water-cooled.
Compared with prior art, the present invention adopts the alloy materials such as tungsten carbide ceramics particles enhancing is Ni-based, cobalt-based, and this material is fused metallic substrate surface as coating, (hardness can reach more than 60HRC to the existing higher hardness of carbon tungsten alloy coating obtained in metallic substrate surface, porosity is lower than 0.5%), have excellent wear resistance and erosion resistance again, be specially adapted to the surface hardness and the wear resistance that improve metal works, meet the demand in the fields such as military project, Hai Gong, machinery, automobile, aerospace, chemical industry.Present invention process is simple, and is applicable to the metalwork of complicated shape.
Accompanying drawing explanation
Fig. 1 is wolfram varbide coating change schematic diagram before and after metallic substrate surface cladding wolfram varbide coating.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
No. 45 steel surfaces fuse tungsten carbide of nickel-base cladding process, comprise the following steps:
1. tungsten carbide of nickel-base weight percentages of components is: Co-based alloy powder 35%, wolfram varbide 65%, and tungsten-carbide powder globule size is 30 ~ 50 μm, the globule size of Co-based alloy powder 50 ~ 100 μm.
2. above-mentioned metal-powder is placed in ball mill mixing machine to mix, mixing time 3h.
3. in the metal-powder mixed, add the polytetrafluorethylepowder powder that quality is metal-powder quality 5%, mix in ball mill mixing machine after stirring, mixing time is 3h, then on cluster mill, roll compacting is become flat cloth-like, obtains cloth-like wolfram varbide coating.
4. after No. 45 steel substrate machining grinding machines being polished, polished bright and clean with 220 order sand paper, use alcohol and acetone soln clean surface wipe oil respectively, and dry with loft drier.
5. the powerful sizing agent of cloth-like wolfram varbide coating is bonded at substrate surface, sizing agent is smeared even and frivolous between coating and base material, and thickness is no more than 0.1mm.
6. the coating bondd and base material are put into vacuum heat treatment calcining kiln to vacuumize, binding agent in removing compoiste adhering coating and moisture, preheating and drying sample simultaneously, moisture entrapment is avoided at high temperature to react with coating or matrix, below vacuum level requirements 10Pa, temperature requirement reaches 330 DEG C, temperature rise rate 2 DEG C/min, soaking time 5h.
7. heat to 800 DEG C with 5 DEG C/min temperature rise rate, subordinate phase temperature rise rate 3 DEG C/min, be warming up to fusing sintering temperature 1150 DEG C, at this temperature 8min.
8. furnace cooling, after being cooled to 150 DEG C, takes out air cooling.
9. coating part is carried out modifier treatment, technique comprises: quenching temperature 840 DEG C (shrend), high tempering 560 DEG C, and then insulation 1h comes out of the stove water-cooled.Before and after metallic substrate surface cladding wolfram varbide coating, the change of wolfram varbide coating as shown in Figure 1.
10. the thickness of gained coating is 2mm after tested, and porosity is 0.3%, and hardness is 65HRA, and there is continuous solid solution diffusion layer between coating and base material, interface bond strength is greater than 200MPa.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (7)
1., in a method for metallic substrate surface cladding wolfram varbide coating, it is characterized in that, comprise the following steps:
(1) carbon tungsten alloy coating film forming in advance: after tungsten-carbide powder and exotic metal alloys powder are mixed, add membrane-forming agent, and roll compacting is become flat cloth-like, obtain carbon tungsten alloy coating;
(2) use sizing agent or use mechanical grip method that carbon tungsten alloy coating is bonded at metallic substrate surface;
(3) metal base with carbon tungsten alloy coating is fused at vacuum oven, fused rear air cooling;
(4) subsequent heat treatment is carried out to the metal base after step (3) process.
2. a kind of method at metallic substrate surface cladding wolfram varbide coating according to claim 1, is characterized in that, in step (1), described exotic metal alloys powder comprises Ni-based and cobalt base alloy.
3. a kind of method at metallic substrate surface cladding wolfram varbide coating according to claim 1, it is characterized in that, in step (1), the weight percent of wolfram varbide controls 55% ~ 80%, and exotic metal alloys powder weight controls 45% ~ 20%.
4. a kind of method at metallic substrate surface cladding wolfram varbide coating according to claim 1, it is characterized in that, in step (1), described membrane-forming agent comprises tetrafluoroethylene, paraffin or rosin material.
5. a kind of method at metallic substrate surface cladding wolfram varbide coating according to claim 1, is characterized in that, in step (1), the add-on of described membrane-forming agent accounts for 1% ~ 10% of tungsten-carbide powder and exotic metal alloys powder gross weight.
6. a kind of method at metallic substrate surface cladding wolfram varbide coating according to claim 1, it is characterized in that, the heat treatment cycle curve fused at vacuum oven in step (3) is: temperature rise rate 3-10 DEG C/min, to 300-450 DEG C, and be incubated 3 ~ 5 hours, then 700-900 DEG C is warming up to the temperature rise speed of 3-10 DEG C/min, then 900 DEG C ~ 1280 DEG C are warming up to the heat-up rate of 2-6 DEG C/min, insulation 3-15min, then stop heating, cool to less than 200 DEG C with the furnace.
7. a kind of method at metallic substrate surface cladding wolfram varbide coating according to claim 1, it is characterized in that, when described metal base is No. 45 steel, subsequent heat treatment technique described in step (4) is: adopt shrend, quenching temperature 840 DEG C, then high tempering 560 DEG C, then insulation 1h comes out of the stove water-cooled.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177568A (en) * | 2015-10-13 | 2015-12-23 | 四川科力特硬质合金股份有限公司 | Hot-fritting tungsten carbide-other carbide solid solution alloy coating and preparation method thereof |
| CN105441936A (en) * | 2015-11-11 | 2016-03-30 | 刘昭晖 | Process technology for coating of high-speed steel taper shank twist drill |
| CN106402420A (en) * | 2016-10-10 | 2017-02-15 | 华东理工大学 | Wear-resistant and washout-resistant ball valve core and manufacturing method thereof |
| CN106702304A (en) * | 2017-01-22 | 2017-05-24 | 石家庄市藁城区北创刀具有限公司 | Preparation method of wear-resisting layers of tool special for green fodder |
| CN109811234A (en) * | 2018-12-10 | 2019-05-28 | 江苏科技大学 | A kind of WC-10Ni/BNi-2 composite coating, using drill bit of composite coating preparation and preparation method thereof |
| CN110195224A (en) * | 2019-06-26 | 2019-09-03 | 青岛石大华通科技有限公司 | A kind of steel body PDC drill bit case hardening process |
| CN113652686A (en) * | 2021-08-10 | 2021-11-16 | 江苏智远激光装备科技有限公司 | Nickel-based tungsten carbide laser cladding process for nickel-aluminum bronze surface |
| CN113652688A (en) * | 2021-08-18 | 2021-11-16 | 江苏智远激光装备科技有限公司 | Laser cladding nickel-based tungsten carbide process for copper alloy core glass mold |
| CN113832459A (en) * | 2021-07-20 | 2021-12-24 | 江苏智远激光装备科技有限公司 | Laser cladding process of nickel-based tungsten carbide alloy powder for alloy steel punch glass die |
Citations (1)
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| US20140271319A1 (en) * | 2013-03-15 | 2014-09-18 | Kennametal Inc. | Cladded articles and methods of making the same |
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- 2015-07-03 CN CN201510390117.XA patent/CN104911586A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140271319A1 (en) * | 2013-03-15 | 2014-09-18 | Kennametal Inc. | Cladded articles and methods of making the same |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177568A (en) * | 2015-10-13 | 2015-12-23 | 四川科力特硬质合金股份有限公司 | Hot-fritting tungsten carbide-other carbide solid solution alloy coating and preparation method thereof |
| CN105441936A (en) * | 2015-11-11 | 2016-03-30 | 刘昭晖 | Process technology for coating of high-speed steel taper shank twist drill |
| CN106402420A (en) * | 2016-10-10 | 2017-02-15 | 华东理工大学 | Wear-resistant and washout-resistant ball valve core and manufacturing method thereof |
| CN106402420B (en) * | 2016-10-10 | 2019-03-22 | 华东理工大学 | Wear-resisting and erosion resistant ball valve core and its manufacturing method |
| CN106702304A (en) * | 2017-01-22 | 2017-05-24 | 石家庄市藁城区北创刀具有限公司 | Preparation method of wear-resisting layers of tool special for green fodder |
| CN109811234B (en) * | 2018-12-10 | 2020-07-14 | 江苏科技大学 | WC-10Ni/BNi-2 composite coating, drill bit prepared by adopting composite coating and preparation method of drill bit |
| CN109811234A (en) * | 2018-12-10 | 2019-05-28 | 江苏科技大学 | A kind of WC-10Ni/BNi-2 composite coating, using drill bit of composite coating preparation and preparation method thereof |
| CN110195224A (en) * | 2019-06-26 | 2019-09-03 | 青岛石大华通科技有限公司 | A kind of steel body PDC drill bit case hardening process |
| CN110195224B (en) * | 2019-06-26 | 2021-04-23 | 青岛石大华通科技有限公司 | Surface hardening method for steel PDC drill bit |
| CN113832459A (en) * | 2021-07-20 | 2021-12-24 | 江苏智远激光装备科技有限公司 | Laser cladding process of nickel-based tungsten carbide alloy powder for alloy steel punch glass die |
| CN113832459B (en) * | 2021-07-20 | 2023-09-29 | 江苏智远激光装备科技有限公司 | Process for cladding nickel-based tungsten carbide alloy powder on alloy steel punch glass die by laser |
| CN113652686A (en) * | 2021-08-10 | 2021-11-16 | 江苏智远激光装备科技有限公司 | Nickel-based tungsten carbide laser cladding process for nickel-aluminum bronze surface |
| CN113652688A (en) * | 2021-08-18 | 2021-11-16 | 江苏智远激光装备科技有限公司 | Laser cladding nickel-based tungsten carbide process for copper alloy core glass mold |
| CN113652688B (en) * | 2021-08-18 | 2023-09-29 | 江苏智远激光装备科技有限公司 | Laser cladding nickel-based tungsten carbide technology for copper alloy core glass mold |
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