CN1392285A - PCVO plasma impregnation composite reinforced method for precise vane hot forging die - Google Patents
PCVO plasma impregnation composite reinforced method for precise vane hot forging die Download PDFInfo
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- CN1392285A CN1392285A CN 02114481 CN02114481A CN1392285A CN 1392285 A CN1392285 A CN 1392285A CN 02114481 CN02114481 CN 02114481 CN 02114481 A CN02114481 A CN 02114481A CN 1392285 A CN1392285 A CN 1392285A
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Abstract
The PCVD plasma impregnation process of hot forging die includes surface deoiling, polishing, supersonic cleaning in acetone and alcohol dewatering of the die after quenching at 1070 deg.c and tempering at 530 deg.c; plasma nitriding in a industrial PCVD vacuum furnace; and PCVD plating. The die thus treated has surface structure comprising base, diffusion layer of solid solution of nitrogen in alpha-Fe with the nitriding layer thickness being 150-180 micron, TiN film layer of 2.0 micron thickness or TiCN film layer of 1.5 micron thickness. Thus treated surface has hardness at high as Hv1800-2200 and high film attaching strength suitable for harsh friction wear condition.
Description
One, affiliated field
The invention belongs to the plasma surface modification field, further relate to a kind of PCVD plasma body plating composite strengthening method of precise vane hot forging die.
Two, background technology
Precise vane hot forging die is the critical process equipment of aircraft engine blade moulding, is used for blade material hot-forging formings such as titanium alloy, stainless steel and high-temperature nickel-base alloy.Simultaneously, vane hot forging die also is the very harsh class mould product of service condition, outstanding three aspects that show: Working environment is high temperature and anxious heat, chilling, carry load is heavy duty and high speed impact, the forging and pressing process be blank the violent gross distortion of die surface and with frictional wear of die surface etc., cause inefficacies such as the friction of hot-forging model cavity face, wearing and tearing and thermal fatigue thus, directly influence blade surface smooth finish and die life, make the significantly increase of leaf quality stability decreases and production cost.Therefore, improve die surface quality and become blade work-ing life and make one of gordian technique of tool core competitiveness.
At present, about improving the hot forged mould surface quality and the method in work-ing life mainly from two aspect researchs, design of first material composition and thermal treatment, development through decades, material system is ripe relatively, the potentiality that material property further excavates are limited, develop into now combination of strength and toughness 4Cr5MoSiV (H11), 4Cr5MoSiV1 (H13) etc. preferably by original 5CrNiMio (high-toughness hot forging die), 8Cr3 (wear resistant hot forging die steel), 3Cr2W8V (the high hot heat-flash die steel of H21) as the hot forged mould material; It two is the various process for modifying surface of exploitation, improves the military service performance of mould.Wherein, plasma nitridation is the sufacing that early is used to improve hot forged mould friction wear performance, domesticly begin to introduce and exploitation about nineteen seventies greatly, become industrial mature technology at present, vane hot forging die general process for modifying surface at present is a plasma nitridation, and it is the in-depth of thermo-chemical treatments such as traditional carburizing, nitriding.
Developed the ion implantation technique of hot forged mould subsequently, comprised that nitrogen ion and metal ion inject, and have obtained the good result at the die surface ion modification in succession.The characteristics of this technology are room temperature treatment, no dimensional change, and the sight line of injection is obvious, so be suitable for the better simply accurate hot forged mould surface strengthening of shape.Its strengthening principle mainly is the over-saturation solid solution, because it is thinner to inject the top layer, strengthening effect is relatively limited.
Ion film plating has brought a revolution in the application in friction field to surface strengthening technology, and it is by compound one deck ceramic membrane makes its wear resistance and solidity to corrosion etc. that radical change take place in the metallic surface.At present existing physical vapor deposition (PVD), chemical vapor deposition (CVD) and plasma auxiliary chemical vapor deposition methods such as (PCVD) are applied on dissimilar moulds.The subject matter of surface coating is the adhesion property of film and matrix, and this also is plating and the main difference of oozing, annotating.In fact, various surface strengthening technologies all have the relative merits of himself, make its with the competition of other technology in acquisition of technology and advantage economically, must interpenetrate between the various technology, adopt the length of other technology or combine to strengthen core competitive with other technology.For example the physical gaseous phase deposition coating depositing temperature is low, and growth velocity is fast, but coating stress is big, and adhesion strength is lower, easily peels off in early days under heavy duty impact condition; After using chemical vapour deposition instead, adhesion strength is fine, but treatment temp is higher, needs not only need acquire vacuum hardening equipment to steel matrix quench hardening again, prevents high temperature oxidation, also may be because the heating cooling makes workpiece deformation; Though ion implanted layer has been avoided film base interface problem, input horizon is thinner, and sight line also is difficult to basic solution, and present equipment and technology running cost are still higher.Only this example illustrates comprehensive or compound various surface strengthening technologies, and obtaining brand-new advanced modified layer structural system is the better approach that is expected to break through existing single technology.It is compound mutually in the hope of optimizing effect to ooze, annotate, plate three types of technology, has represented the developing direction of surface strengthening technology.Some surface recombination technology have been developed now, as ion beam assisted depositing is that ion implantation and ion beam is sedimentary compound, the ceramic membrane that the latter produces is greatly improved surface hardness, and the ion implanted layer that the former introduces is effectively improved the interface condition of film and matrix; And for example the plating Combined Processing of plasma nitridation and physical vapor deposition film has further been improved the surface property of mould.But the compound report of plasma body plating so far mainly is the separating treatment (processing of two stoves) of plasma nitridation and physical vapor deposition film, cost height not only, and treatment effect also is difficult to adapt to the harsh working condition resemble the hot-forging die.Do not find separating treatment as yet, more do not see the report of the PCVD plasma body of the relevant precise vane hot forging die of making at the H13 material with stove plating Combined Processing at the plasma nitridation and the physical vapor deposition coating film of precise vane hot forging die.
Three, summary of the invention
Purpose of the present invention is all in the novel method of the PCVD plasma body that proposes a kind of precise vane hot forging die of making at the H13 material with stove plating Combined Processing.Utilize this invention that the surface treatment cost of mould is reduced, production efficiency increases, and die quality obviously improves, and significantly improve work-ing life.
For achieving the above object, the technical solution used in the present invention is:
Utilize the applicant under 863 plans are supported, national inventing patent is identified and obtained to industrial pulse direct-current plasma assistant chemical vapor deposition (PCVD) equipment of developing at the beginning of 1999 (by ministerial level, the patent No. 991159594) principle of work and technical characterstic, in with stove, carry out the plasma nitridation of vane hot forging die earlier and handle, carry out coating film treatment then.Because tissue and layer depth are controlled during the PCVD nitriding, optimize compound in conjunction with plated film, can obtain the cementation coating performance of good combination, in the work-ing life of obviously having improved mould, obtain the production cost that unapproachable strengthening effect of single processing and separating treatment are difficult to reduce.
Concrete grammar of the present invention is:
1) will be through 1070 ℃ of quenchings, the blade mold (HRC=43-50) after 530 ℃ of tempering is ultrasonic cleaning in surface degreasing, polishing back immersion acetone, dehydration of alcohol;
2) put into industrial PCVD vacuum oven then and carry out plasma nitridation and PCVD plated film (TiN or TiCN) processing.
Wherein the plasma nitridation processing condition are: pulsed voltage 1000V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 1000-1500Pa, N
2/ (N
2+ H
2) ratio 25%, nitriding time 20-30h.
PCVD TiN coating process condition: pulsed voltage 700V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 200Pa, N
2180ml/min, H
2800-1000ml/min, Ar70ml/min, TiCl
4(carry H
2) 20-40ml/min, depositing time 4-6h.
Mould textura epidermoidea is matrix-diffusion layer-TiN rete after above-mentioned plating Combined Processing.Wherein, diffusion layer is the sosoloid of nitrogen in α-Fe, and no compound occurs, the about 150-180 μ of nitrided case m, and the TiN film thickness is about 2.0 μ m.Surface hardness Hv1800 through after this Combined Processing is higher than the surface hardness Hv1500 that TiN directly is deposited on H13 mould base material, and this is owing to the higher supporting capacity of infiltration layer.Simultaneously, the load support effect that nitrided case is stronger makes the adhesion strength of film have a more substantial increase.
PCVD TiCN coating process condition: pulsed voltage 700V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 200Pa, N
230ml/min, CH
4120ml/min, H
2800-1000ml/min, Ar70ml/min, TiCl
4(carry H
2) 20-40ml/min, depositing time 4-6h.
Mould textura epidermoidea is matrix-diffusion layer-TiCN rete after above-mentioned plating Combined Processing, and wherein, diffusion layer is the sosoloid of nitrogen in α-Fe, and no compound occurs, the about 150-180 μ of nitrided case m, and the TiCN film thickness is about 1.5 μ m.Because die surface hardness is HV2200 after this Combined Processing of adding of carbon, therefore, be suitable for harsh more frictional wear condition.
Four, embodiment
The present invention is described in further detail below in conjunction with embodiment.
According to technical scheme of the present invention, will be through 1070 ℃ of quenchings, the blade mold (HRC=43-50) after 530 ℃ of tempering is ultrasonic cleaning in surface degreasing polishing back immersion acetone, dehydration of alcohol; Put into industrial PCVD vacuum oven then and carry out plasma nitridation and PCVD plated film (TiN or TiCN) processing.
Wherein the plasma nitridation processing condition are: pulsed voltage 1000V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 1000-1500Pa, N
2/ (N
2+ H
2) ratio 25%, nitriding time 20-30h.
PCVD TiN coating process condition: pulsed voltage 700V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 200Pa, N
2180ml/min, H
2800-1000ml/min, Ar70ml/min, TiCl
4(carry H
2) 20-40ml/min, depositing time 4-6h.
PCVD TiCN coating process condition: pulsed voltage 700V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 200Pa, N
230ml/min, CH
4120ml/min, H
2800-1000ml/min, Ar70ml/min, TiCl
4(carry H
2) 20-40ml/min, depositing time 4-6h.
The contriver has provided following embodiment, but the invention is not restricted to these embodiment.
Embodiment 1:
The precise vane hot forging die of making at the H13 material of 180 * 120 * 100 (length * wide * height) specification, adopt technical scheme of the present invention, with plasma nitridation and PCVD TiN with stove composite treatment process parameter, forging and pressing titanium alloy blade at the scene investigates, die life during by original thermal treatment 100 and 500 of single plasma nitridation bring up to 1000, and the blade surface quality is obviously improved, and production efficiency significantly improves.
Embodiment 2:
The precise vane hot forging die of making at the H13 material of 240 * 180 * 120 (length * wide * height) specification, adopt technical scheme of the present invention, with plasma nitridation and PCVD TiCN with stove composite treatment process parameter, forging and pressing the high-temperature nickel-base alloy blade at the scene investigates, die life during by original thermal treatment 100 and 500 of single plasma nitridation bring up to 960, and the blade surface quality is obviously improved, and production efficiency significantly improves.
Embodiment 3:
The precise vane hot forging die of making at the H13 material of 240 * 180 * 120 (length * wide * height) specification, adopt technical scheme of the present invention, with plasma nitridation and PCVD TiCN with stove composite treatment process parameter, forging and pressing stainless steel blade at the scene investigates, die life during by original thermal treatment 80 and 300 of single plasma nitridation bring up to 500, and the blade surface quality is obviously improved, and production efficiency significantly improves.
Claims (1)
1. a precise vane hot forging die PCVD plasma body plating composite strengthening method is characterized in that, carries out by the following method:
1) will be through 1070 ℃ of quenchings, the blade mold (HRC=43-50) after 530 ℃ of tempering is ultrasonic cleaning in surface degreasing, polishing back immersion acetone, dehydration of alcohol;
2) put into industrial PCVD vacuum oven then and carry out plasma nitridation and PCVD plated film (TiN or TiCN) processing;
The plasma nitridation processing condition are: pulsed voltage 1000V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 1000-1500Pa, N
2/ (N
2+ H
2) ratio 25%, nitriding time 20-30h.
The processing condition of PCVD plated film (TiN) are: pulsed voltage 700V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 200Pa, N
2180ml/min, H
2800-1000ml/min, Ar70ml/min, TiCl
4(carry H
2) 20-40ml/min, depositing time 4-6h;
The processing condition of PCVD plated film (TiCN) are: pulsed voltage 700V, dutycycle 1: 1, pulse-repetition 17KHz, 520 ℃ of temperature, air pressure 200Pa, N
230ml/min, CH
4120ml/min, H
2800-1000ml/min, Ar70ml/min, TiCl
4(carry H
2) 20-40ml/min, depositing time 4-6h.
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|---|---|---|---|
| CNB021144818A CN1156598C (en) | 2002-03-25 | 2002-03-25 | PCVO plasma impregnation composite reinforced method for precise vane hot forging die |
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|---|---|---|---|
| CNB021144818A CN1156598C (en) | 2002-03-25 | 2002-03-25 | PCVO plasma impregnation composite reinforced method for precise vane hot forging die |
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| CN1156598C CN1156598C (en) | 2004-07-07 |
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| CN102400087A (en) * | 2010-09-08 | 2012-04-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method for blade ceramic core precision casting equipment |
| CN102877070A (en) * | 2012-06-14 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface compound treatment method for steel mould |
| CN104195553A (en) * | 2014-08-15 | 2014-12-10 | 陕西天元智能再制造有限公司 | Surface strengthening method of extrusion die |
| CN105080988A (en) * | 2015-09-18 | 2015-11-25 | 上虞市宏恩精密机械有限公司 | Aluminum-alloy hollow tube extruding die based on PCVD processing |
| CN105112884A (en) * | 2015-09-18 | 2015-12-02 | 上虞市宏恩精密机械有限公司 | PCVD surface treating method for aluminum alloy hollow tube extrusion mold |
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| CN112921325A (en) * | 2020-12-25 | 2021-06-08 | 苏州奥维精密机械有限公司 | High-stability die steel surface composite double-treatment process |
| CN115928000A (en) * | 2022-12-09 | 2023-04-07 | 无锡福伊特电子科技有限公司 | Corrosion-resistant and wear-resistant metal sheet metal workpiece material for lithium battery slurry vacuum mixer |
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| CN102400087A (en) * | 2010-09-08 | 2012-04-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method for blade ceramic core precision casting equipment |
| CN102877070A (en) * | 2012-06-14 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface compound treatment method for steel mould |
| CN104195553A (en) * | 2014-08-15 | 2014-12-10 | 陕西天元智能再制造有限公司 | Surface strengthening method of extrusion die |
| CN105112884B (en) * | 2015-09-18 | 2018-02-06 | 浙江宏恩智能装备技术有限公司 | A kind of PCVD surface treatment methods of aluminum alloy hollow pipe extrusion die |
| CN105112884A (en) * | 2015-09-18 | 2015-12-02 | 上虞市宏恩精密机械有限公司 | PCVD surface treating method for aluminum alloy hollow tube extrusion mold |
| CN105080988A (en) * | 2015-09-18 | 2015-11-25 | 上虞市宏恩精密机械有限公司 | Aluminum-alloy hollow tube extruding die based on PCVD processing |
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| CN106890367A (en) * | 2017-03-29 | 2017-06-27 | 纳狮新材料股份有限公司 | Composite coating scalpel and preparation method thereof |
| CN106917089A (en) * | 2017-03-29 | 2017-07-04 | 纳狮新材料股份有限公司 | Composite coating anestetic needle and preparation method thereof |
| CN106947971A (en) * | 2017-03-29 | 2017-07-14 | 纳狮新材料股份有限公司 | Composite coating electric knife cutter head, its preparation method and electric knife |
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| CN110042341A (en) * | 2019-04-16 | 2019-07-23 | 太仓久信精密模具股份有限公司 | A method of extending the cold Warm Forging Die service life of bevel gear |
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