CN102912346B - Manufacturing method of valve forming mould covered with wear-resistant heat insulation film layer - Google Patents
Manufacturing method of valve forming mould covered with wear-resistant heat insulation film layer Download PDFInfo
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- CN102912346B CN102912346B CN201210381313.7A CN201210381313A CN102912346B CN 102912346 B CN102912346 B CN 102912346B CN 201210381313 A CN201210381313 A CN 201210381313A CN 102912346 B CN102912346 B CN 102912346B
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Abstract
The invention provides a manufacturing method of a valve forming mould covered with a wear-resistant heat insulation film layer. The wear-resistant heat insulation film layer covers the surface of a cavity of the valve forming mould and comprises a transition layer and a wear-resistant heat insulation layer; and the transition layer is positioned between the cavity of the valve forming mould and the wear-resistant heat insulation layer. The manufacturing method comprises the steps as follows: (1), mechanically polishing the surface of the cavity of the valve forming mould covered with the wear-resistant heat insulation film layer; (2), preparing the transition layer by using electric spark deposition; (3), mechanically polishing the surface of the transition layer; (4), conducting plasma etching on the surface of the transition layer to prepare a micropore array; and (5), conducting magnetron sputtering on the surface of the transition layer to prepare the wear-resistant heat insulation layer. The manufacturing method of the valve forming mould covered with a wear-resistant heat insulation film layer can make a guide for production of the valve forming mould covered with the wear-resistant heat insulation film layer.
Description
Technical field
The present invention relates to a kind of mechanically shape mould, particularly relate to a kind of preparation method of the valve shaping dies that covers wear-resisting heat insulation rete.
Background technology
The valve of engine is the strength member in engine, after the electric upsetting of domestic main employing at present, after finish-forging and extruding, two kinds of processing methodes of finish-forging are carried out blank production, it is one of critical process of valve blank processing that finish-forging is shaped, in valve blank finish-forging forming process, because flowing of metal is violent, the environment of mold work is severe, causes die life very low, and a general mold can only be produced 500 ~ 1000 valves.Too low die life, had both significantly increased production cost, again production efficiency was caused to very large impact.
Valve is in finish-forging forming process, all there is flowing to bar portion in the metal at fillet position always, while being shaped beginning, velocity of flow is less, there is bar portion and the diametric shunting situation of deep bid in the intermediate stage, finally be full of after impression, under the effect of punch, nearly all inside workpiece metal all by produce to bar portion flow, the metal flow speed at fillet position enlarges markedly.The fillet position of die contacts with mould always, shaping final stage, and whole impression surface all contacts with workpiece.Therefore in whole forming process, because the die entrance position that is flowing in of metal all will produce serious contact friction function, the final stage of shaping is more remarkable.In forming process, the temperature distribution of die is extremely inhomogeneous, due to long duration of contact at fillet position and workpiece, this position and near zone are always in comparatively high temps, be up to 700 ℃, and temperature produces periodical change in forming process, can produce thermal fatigue, this will reduce the intensity of mould, causes fillet position more easily to occur damage.Due to the effect contacting with workpiece, die entrance position is always in high-stress state, shaping final stage, stress enlarges markedly, and even exceedes the yield strength of material, will make mould produce viscous deformation, and stress exists periodical change, the stress fatigue of mould will be caused.
Valve is in forming process, and the Working environment at die corner position is the most severe, and when finish-forging is shaped, fillet part position mould surface is the position the fiercest with friction of workpiece, fraction time is the longest, the most easily wearing and tearing.Meanwhile, fillet position is also that heated time is the longest, the highest, the most difficult cooling position of temperature, and viscous deformation and adhesive wear the most easily occur.Therefore, be the main path of boosting productivity, reducing production costs the work-ing life of the high temperature wear resistance of raising mould, prolongation mould.
Summary of the invention
The object of this invention is to provide a kind of preparation method of the valve shaping dies that covers wear-resisting heat insulation rete, the preparation method of the valve of the wear-resisting heat insulation rete of this covering can instruct the processing of the valve shaping dies that covers wear-resisting heat insulation rete.
In order to achieve the above object, the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering of the present invention, is characterized in that:
1., to covering the mold cavity surface mechanical polishing of valve shaping dies of wear-resisting heat insulation rete;
2., with electric spark deposition, prepare transition layer;
3., transition layer surface mechanical polishing;
4., transition layer surface plasma etching microwell array;
5., transition layer surface magnetic control sputtering is prepared wear-resisting thermofin.
The preparation method of the valve shaping dies of the described wear-resisting heat insulation rete of covering, is characterized in that: roughness Ra≤0.05, the mold cavity surface mechanical polishing rear surface μ m that covers the valve shaping dies of wear-resisting heat insulation rete.
The preparation method of the valve shaping dies of the described wear-resisting heat insulation rete of covering, is characterized in that: the mechanical surface of polished roughness in transition layer surface reaches Ra≤0.05 μ m.
The preparation method of the valve shaping dies of the described wear-resisting heat insulation rete of covering, is characterized in that: the microwell array of transition layer surface plasma etching is aperture 5 μ m, hole depth 5 μ m, pitch of holes 20 μ m.
The preparation method of the valve shaping dies of the described wear-resisting heat insulation rete of covering, it is characterized in that: the magnetron sputtering parameter that transition layer surface magnetic control sputtering is prepared wear-resisting thermofin is operating air pressure 0.1 ~ 0.6Pa, load negative bias-100～-400V, sputtering voltage 500 ~ 700 V, target as sputter current density 0.1 ~ 0.15 A/cm
2, sputtering time is 0.5 ~ 30 hour.
The preparation method of the valve shaping dies of the described wear-resisting heat insulation rete of covering, it is characterized in that: with electric spark deposition, prepare the processing parameter of transition layer as being output voltage 50 ~ 150V, electric capacity 100 ~ 300 μ F, frequency 2000 ~ 3000Hz, than depositing time 1 ~ 3min/cm
2, electrode rotating speed 2000 ~ 3000r/min.
The preparation method of the valve shaping dies of the described wear-resisting heat insulation rete of covering, is characterized in that: the processing method of transition layer surface plasma etching microwell array is: adopting laser processing technology is that on 0.05mm organic silica gel film, to process through-hole aperture be that 5 μ m, pitch of holes are the microwell array of 20 μ m at thickness; Organic silica gel film with microwell array is affixed on to mold cavity surface, carries out plasma etching, ion-gas is Ar gas, and vacuum tightness is 1 ~ 3Pa, and matrix negative bias is 600 ~ 800V, and the time is 5 ~ 20min.
The preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering of the present invention, the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of this covering can instruct the processing of the valve shaping dies that covers wear-resisting heat insulation rete.
Accompanying drawing explanation
Fig. 1 is the schema that the present invention covers the preparation method of the valve shaping dies of wear-resisting heat insulation rete.
Embodiment
Referring to Fig. 1, the embodiment that the present invention covers the preparation method of the valve shaping dies of wear-resisting heat insulation rete comprises the following steps:
1., to covering the mold cavity surface mechanical polishing of valve shaping dies of wear-resisting heat insulation rete;
2., with electric spark deposition, prepare transition layer;
3., transition layer surface mechanical polishing;
4., transition layer surface plasma etching microwell array;
5., transition layer surface magnetic control sputtering is prepared wear-resisting thermofin.
Embodiment 1
Mold cavity material: 3Cr2W8V.
Electric spark deposition is prepared transition layer (NiCoCrAlY) processing parameter: output voltage 100 V, and electric capacity 150 μ F, frequency 2500Hz, than depositing time 1.0min/cm
2, electrode rotating speed 2500r/min.
Plasma etching microwell array processing parameter: vacuum tightness is 1.0Pa, matrix negative bias is 650V, the time is 10min.
Magnetron sputtering is prepared wear-resisting thermofin (ZrO2) processing parameter: operating air pressure 0.1 Pa, loads negative bias-100 V, sputtering voltage 500 V, target as sputter current density 0.1 A/cm
2, sputtering time is 0.5 hour.
Embodiment 2
Mold cavity material: 4Cr5MoSiV1.
Electric spark deposition is prepared transition layer (NiCoCrAlY) processing parameter: output voltage 150V, and electric capacity 100 μ F, frequency 3000Hz, than depositing time 1.2min/cm
2, electrode rotating speed 3000r/min.
Plasma etching microwell array processing parameter: vacuum tightness is 1.2Pa, matrix negative bias is 700V, the time is 15min.
Magnetron sputtering is prepared wear-resisting thermofin (ZrO2) processing parameter: operating air pressure 0.1 Pa, and sample loads negative bias-300 V, sputtering voltage 600 V, target as sputter current density 0.12 A/cm2, sputtering time is 1 hour.
Embodiment 3
Mold cavity material: 3Cr3Mo3VNb.
Electric spark deposition is prepared transition layer (NiCoCrAlY) processing parameter: output voltage 150V, and electric capacity 150 μ F, frequency 3000Hz, than depositing time 1.5min/cm
2, electrode rotating speed 3000r/min.
Plasma etching microwell array processing parameter: vacuum tightness is 1.0Pa, matrix negative bias is 800V, the time is 10min.
Magnetron sputtering is prepared wear-resisting thermofin (ZrO2) processing parameter: operating air pressure 0.1 Pa, sample loads negative bias-200 V, sputtering voltage 650 V, target as sputter current density 0.1 A/cm
2, sputtering time is 2 hours.
The preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering of the present invention, the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of this covering can instruct the processing of the valve shaping dies that covers wear-resisting heat insulation rete, applying of it, to improve valve shaping dies work-ing life, positive meaning reduces production costs, enhances productivity.
Claims (7)
1. the preparation method who covers the valve shaping dies of wear-resisting heat insulation rete, is characterized in that:
1., to covering the mold cavity surface mechanical polishing of valve shaping dies of wear-resisting heat insulation rete;
2., with electric spark deposition, prepare transition layer;
3., transition layer surface mechanical polishing;
4., transition layer surface plasma etching microwell array;
5., transition layer surface magnetic control sputtering is prepared wear-resisting thermofin.
2. the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering according to claim 1, is characterized in that: roughness Ra≤0.05, the mold cavity surface mechanical polishing rear surface μ m that covers the valve shaping dies of wear-resisting heat insulation rete.
3. the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering according to claim 1, is characterized in that: the mechanical surface of polished roughness in transition layer surface reaches Ra≤0.05 μ m.
4. the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering according to claim 1, is characterized in that: the microwell array of transition layer surface plasma etching is aperture 5 μ m, hole depth 5 μ m, pitch of holes 20 μ m.
5. the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering according to claim 1, it is characterized in that: the magnetron sputtering parameter that transition layer surface magnetic control sputtering is prepared wear-resisting thermofin is operating air pressure 0.1 ~ 0.6Pa, load negative bias-100～-400V, sputtering voltage 500 ~ 700 V, target as sputter current density 0.1 ~ 0.15 A/cm
2, sputtering time is 0.5 ~ 30 hour.
6. the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering according to claim 1, it is characterized in that: with electric spark deposition, prepare the processing parameter of transition layer as being output voltage 50 ~ 150V, electric capacity 100 ~ 300 μ F, frequency 2000 ~ 3000Hz, than depositing time 1 ~ 3min/cm
2, electrode rotating speed 2000 ~ 3000r/min.
7. the preparation method of the valve shaping dies of the wear-resisting heat insulation rete of covering according to claim 1, is characterized in that: the processing method of transition layer surface plasma etching microwell array is: adopting laser processing technology is that on 0.05mm organic silica gel film, to process through-hole aperture be that 5 μ m, pitch of holes are the microwell array of 20 μ m at thickness; Organic silica gel film with microwell array is affixed on to mold cavity surface, carries out plasma etching, ion-gas is Ar gas, and vacuum tightness is 1 ~ 3Pa, and matrix negative bias is 600 ~ 800V, and the time is 5 ~ 20min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210381313.7A CN102912346B (en) | 2012-10-10 | 2012-10-10 | Manufacturing method of valve forming mould covered with wear-resistant heat insulation film layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210381313.7A CN102912346B (en) | 2012-10-10 | 2012-10-10 | Manufacturing method of valve forming mould covered with wear-resistant heat insulation film layer |
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| CN102912346A CN102912346A (en) | 2013-02-06 |
| CN102912346B true CN102912346B (en) | 2014-04-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776023A (en) * | 2005-11-23 | 2006-05-24 | 邹志尚 | Hard composite nano ceramic film cladding for use in carity of precision pressure mould |
| CN102416459A (en) * | 2011-11-28 | 2012-04-18 | 机械科学研究总院先进制造技术研究中心 | Ultrahigh temperature forming mold and manufacturing method thereof |
| CN202357495U (en) * | 2011-12-02 | 2012-08-01 | 成都酷玩网络科技有限公司 | Wear-resistant and anticorrosion stamping die |
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2012
- 2012-10-10 CN CN201210381313.7A patent/CN102912346B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1776023A (en) * | 2005-11-23 | 2006-05-24 | 邹志尚 | Hard composite nano ceramic film cladding for use in carity of precision pressure mould |
| CN102416459A (en) * | 2011-11-28 | 2012-04-18 | 机械科学研究总院先进制造技术研究中心 | Ultrahigh temperature forming mold and manufacturing method thereof |
| CN202357495U (en) * | 2011-12-02 | 2012-08-01 | 成都酷玩网络科技有限公司 | Wear-resistant and anticorrosion stamping die |
Non-Patent Citations (2)
| Title |
|---|
| 向兴华 等.钛合金表面等离子喷涂ZrO2-NiCoCrAlY梯度涂层的抗热震行为.《宇航学报》.1998,第19卷(第2期),第61-65页. |
| 钛合金表面等离子喷涂ZrO2-NiCoCrAlY梯度涂层的抗热震行为;向兴华 等;《宇航学报》;19980430;第19卷(第2期);第61-65页 * |
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