CN103147037B - Titanium alloy gear with ferroboron diffusion layer on surface and co-diffusion method thereof - Google Patents
Titanium alloy gear with ferroboron diffusion layer on surface and co-diffusion method thereof Download PDFInfo
- Publication number
- CN103147037B CN103147037B CN201310091832.4A CN201310091832A CN103147037B CN 103147037 B CN103147037 B CN 103147037B CN 201310091832 A CN201310091832 A CN 201310091832A CN 103147037 B CN103147037 B CN 103147037B
- Authority
- CN
- China
- Prior art keywords
- gear
- titanium alloy
- boron
- source electrode
- layer
- 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.)
- Expired - Fee Related
Links
Abstract
The invention relates to a titanium alloy gear with a ferroboron diffusion layer on the surface and a co-diffusion method thereof. The method comprises the step of: by taking a titanium alloy gear as a workpiece and taking iron boride as a source, placing the titanium alloy gear and the iron boride on a negative disk to form a workpiece-source integral structure, wherein the negative electrode of a direct current power supply is connected to the negative disk, and the positive electrode of the direct current power supply is connected to a vacuum container; vacuumizing and introducing argon, applying a direct-current voltage to generate hollow negative glow discharge, migrating, adsorbing and spreading the sputtered boron, iron ion, atoms and particles into the gear to form an alloy layer, preserving the heat, slowly cooling to room temperature, thereby obtaining the titanium alloy gear with the ferroboron diffusion layer. The method disclosed by the invention is advanced in process and low in cost; and the prepared gear is strong in seizure resistance, good in wear resistance and long in service life.
Description
Technical field
The present invention relates to a kind of titanium alloy gear, also relate to a kind of titanium alloy gear surface using plasma plating technology and carry out the method that ferro-boron oozes altogether.
Background technology
Gear is the vital part in mechanical means, and it should have excellent wear resistance and possess high contacting fatigue resistance again, the work-ing life of the whole equipment of good and bad direct relation of gear quality.
Traditional gear material is the steel alloy such as 20CrMnTi, 18Cr2Ni4WA, 15CrMn2SiMo mainly, adopts carburizing and thermal treatment process to improve the comprehensive mechanical performance of gear impact toughness, fatigue strength and surface hardness.Compared with Steel Alloy, it is high that titanium alloy has specific tenacity, and density is low, and weight is little, and oxidation-resistance and the advantage such as creep resistance is strong, from these aspects, it is one of preferred material of gear material.But titanium alloy surface wears no resistance, easily stick together, be in use easy to and join secondary occlusion, limiting its practical application on gear.
Existing publication number is CN101798667A disclosed a kind of " hardened titanium structure for transmitting gear application ", but the titanium alloy gear preparation method of this hardened titanium structure is complicated, and difficulty is comparatively large, is difficult to practical application.And the traditional carburization process being widely used in gear surface process is not suitable for the surface treatment to titanium alloy gear, being in carburization process process with regard to its reason, is because titanium alloy surface forms the infiltration that fine and close oxide film blocks carbon atom on the one hand; Be in cementation process on the other hand, hydrogen atom is easy to infiltrate titanium alloy gear surface internal layer, under impact condition, cause hydrogen embrittlement.
In order to realize the alloying of titanium alloy gear surface, the present invention is on publication number a kind of " thermal electron reinforced ionic boronizing device and technique " basis disclosed in CN1632159, according to character and the feature of titanium alloy gear, workpiece-source electrode the integrative-structure of design using ferro-boron as main supply source, realizes titanium alloy gear surface ferro-boron Diffusing Alloying Element altogether.
Summary of the invention
The present invention is on the basis of existing plasma body plating, for the feature of titanium alloy gear, the concrete technical problems solved is the workpiece-source electrode integrative-structure of design using ferro-boron as main supply source, avoid the appearance of hydrogen, oxygen, and form effective boron, iron atom permeation atmosphere altogether, improve the surface property of titanium alloy gear, thus obtain the high performance titanium alloy gear in top layer, its objective is the titanium alloy gear and co-infiltration method thereof that provide a kind of surface to have ferro-boron infiltration layer.
In order to solve the problem, the invention provides titanium alloy gear and co-infiltration method thereof that a kind of surface has ferro-boron infiltration layer, wherein, a kind of surface has the titanium alloy gear of ferro-boron infiltration layer, containing titanium alloy gear, it is characterized in that:
On alpha+beta titanium alloys gear surface, using plasma ferro-boron oozes technology altogether, take FeB as source electrode, obtaining a layer thickness is the wear-resistant alloy layer of 0.02-0.1mm, and its surface boron content is 10% ~ 12%, iron level is 20 ~ 30%, and alloying element content from outward appearance to inner essence gradient reduction.
There is for above-mentioned surface a co-infiltration method for the titanium alloy gear of ferro-boron infiltration layer, it is characterized in that:
Titanium alloy gear is placed in cathode tray central authorities as workpiece, and FeB is placed on the cathode tray around gear as source electrode, between the two apart from being 10 ~ 30mm, forms workpiece-source electrode integrative-structure;
DC power system is made up of a high-voltage DC power supply, and negative pole is connected on cathode tray, and positive pole is connected on the vacuum vessel of ground connection;
By pumped vacuum systems by after evacuating atmosphere in vacuum vessel to final vacuum, be filled with argon gas by inlet system and make vacuum vessel internal gas pressure rise to 13.3 Pa ~ 133.3 Pa;
DC power system applies voltage-500V ~-800V on gear workpieces and source electrode, produces Hollow cathode discharge, thus heating gear workpieces and source electrode; After gear is warming up to 850 DEG C ~ 950 DEG C, insulation 3 ~ 10hr; The migration of the boron be sputtered out, iron ion, atom and particle cluster is adsorbed and diffuses in gear, forms alloy layer; Insulation terminates rear slow cooling to room temperature, obtains the titanium alloy gear that surface has ferro-boron co-penetration layer.
A kind of surface that realizing the invention described above provides has titanium alloy gear and the co-infiltration method thereof of ferro-boron infiltration layer, method described in it utilizes plasma body ferro-boron to ooze technology altogether, for the feature of titanium alloy gear, workpiece-source electrode the integrative-structure of design using ferro-boron as main supply source, avoid the appearance of hydrogen atom, and define effective ferro-boron atom permeation atmosphere altogether, make tooth surface each position infiltration layer even compact, further improve the surface property of titanium alloy gear, thus obtain the high performance titanium alloy gear in top layer.Compared with existing " thermal electron reinforced ionic boronizing device and technique ", due to for concrete titanium alloy gear, designed workpiece-source electrode integrative-structure, without the need to thermal electron emission device and the pulse power, only need a direct supply, lower to the requirement of equipment, technique is optimized more, operates simpler.Compared with existing pack boriding technology, there is treating processes nontoxic, harmless, pollution-free, energy-conserving and environment-protective; Prepared titanium alloy Surface of Gear hardness is higher, and wear resisting property is good, strong shock resistance, and contact fatigue property is excellent, long service life.Be specially adapted to aerospace industry, automotive industry, chemical engineering industry, food and biological-pharmacy.
Accompanying drawing explanation
Fig. 1 is titanium alloy gear plasma body boronizing device structure iron of the present invention.
Fig. 2 is the structural representation of a kind of surface strengthening titanium alloy of the present invention gear.
In figure: 1: cathode tray; 2: workpiece; 3: source electrode; 4: the vacuum vessel of ground connection; 5: DC power system; 6: pumped vacuum systems; 7: inlet system; 8: titanium alloy gear; 9: ferro-boron infiltration layer.
Embodiment
Accompanying drawings is further elaborated the specific embodiment of the present invention below, but does not limit to some extent technical scheme provided by the present invention.
Implementing titanium alloy gear and co-infiltration method thereof that a kind of surface provided by the present invention has ferro-boron infiltration layer, is the manufacturing technology of a kind of top layer Ti alloy with high performance gear.High-performance top layer is the alloy diffusion layer that alloy element boron and iron diffuse into titanium alloy surface and formed.It is as source electrode using FeB, utilize cathode sputtering phenomenon, boron, iron ion, atom and particle cluster in source electrode are sputtered out, the sputtered particle flux such as boron, iron is out adsorbed onto relative with source electrode and on the gear put, and diffuse into tooth surface, form even, fine and close boride layer.The boronising titanium alloy gear surface roughness formed is little, and surface hardness is higher, and wear resistance is excellent, and strong shock resistance, contact fatigue property is excellent, is a kind of new titanium alloy gear with wide application prospect.
The starting material of a kind of titanium alloy gear of above-mentioned enforcement adopt (alpha+beta) titanium alloy, altogether technology is oozed to its surperficial using plasma ferro-boron, and designing corresponding workpiece-source electrode integrative-structure for the features of shape of straight tooth gear, further Simplified flowsheet, reduces costs.Workpiece-source electrode integrative-structure is that titanium alloy gear is placed in the central authorities of cathode tray 1 as workpiece 2, and FeB is placed on the cathode tray 1 around gear as source electrode 3, between the two apart from 10 ~ 30mm, is preferably chosen as about 20 mm.DC power system 5 is made up of a high-voltage DC power supply, and negative pole is connected on cathode tray 1, and positive pole is all connected on the vacuum vessel 4 of ground connection.
Concrete preparation process is, after vacuum vessel 4 being evacuated down to final vacuum by pumped vacuum systems 6, being filled with argon gas making vacuum vessel 4 internal gas pressure rise to operating air pressure by inlet system 7; DC power system 5 applies a voltage on gear workpieces 2 and source electrode 3, produces Hollow cathode discharge, thus heating gear workpieces 2 and source electrode 3; Gear 2 is incubated for some time after being warming up to working temperature, makes boron, iron ion, atom and the particle cluster migration be sputtered out adsorb and diffuse into gear internal, forms alloy layer; Insulation terminates rear slow cooling to room temperature, and the top layer obtained as shown in Figure 2 is the gear that ferro-boron is total to cemented alloy layer (8), matrix is titanium alloy (9).Process parameters range is, operating air pressure 13.3 Pa ~ 133.3 Pa, working temperature 850 DEG C ~ 950 DEG C, and ferro-boron oozes soaking time 3 ~ 10hr(boronising soaking time altogether depending on processing requirement), power supply potential-500V ~-800V.
The titanium alloy gear that above-mentioned titanium alloy gear surface confusion technology obtains, ooze technology altogether at alpha+beta titanium alloys gear surface using plasma ferro-boron, take FeB as source electrode, acquisition a layer thickness is 0.02-0.1mm, surface boron content is 10% ~ 12%, iron level is 20 ~ 30%, and the alloying element content from outward appearance to inner essence one surface Ti alloy with high performance gear that reduces of gradient.
Owing to avoiding the appearance of hydrogen, oxygen element in the surface treatment process of above-mentioned titanium alloy gear, there is not hydrogen embrittlement problem and the problem of oxidation of titanium alloy, and preparation process is all the time without any pollution, made titanium alloy Surface of Gear hardness is higher, strong shock resistance, contact fatigue property is excellent, long service life.
The specific embodiment of the present invention is further illustrated below by specific embodiment.
EXAMPLE l
The Surface of Gear that using plasma boronizing technology manufactures at Ti6Al4V alloy (alpha+beta titanium alloys) material forms ferro-boron diffusion layer.The source electrode 3 form FeB and Ti6Al4V gear are positioned on same cathode tray 1, and gear is placed in the middle, outside source electrode occupies, between the two apart from 25mm.Be evacuated down to and be less than 1Pa, be filled with argon gas and make air pressure rise to 45Pa, between cathode tray 1 and vacuum vessel 4, making alive-690V, makes gear temperature be raised to 850 DEG C, is incubated 3 hours, and furnace cooling arrives room temperature.
The titanium alloy gear formed by above-mentioned technological process, body remains the Ti6Al4V alloy that alpha+beta is formed mutually, the each several part top layer of the gear teeth be evenly distributed, thickness is 0.02mm oozes iron boron layer, its surface boron content is 10.4%, iron level is 20.3%, and alloying element content from outward appearance to inner essence gradient reduction.After testing, surface hardness 780 Hv.Without hydrogen embrittlement.
Embodiment 2
The Surface of Gear that using plasma boronizing technology manufactures at Ti6Al4V alloy material forms ferro-boron diffusion layer.The source electrode 3 form FeB and Ti6Al4V gear are positioned on same cathode tray 1, and gear is placed in the middle, outside source electrode occupies, between the two apart from 25mm.Be evacuated down to and be less than 1Pa, be filled with argon gas and make air pressure rise to 45Pa, between cathode tray 1 and vacuum vessel 4, making alive-780V, makes gear temperature be raised to 950 DEG C, is incubated 10 hours, and furnace cooling arrives room temperature.
The titanium alloy gear formed by above-mentioned technological process, body remains the Ti6Al4V alloy that alpha+beta is formed mutually, the each several part top layer of the gear teeth be evenly distributed, thickness is 0.09mm oozes iron boron layer, its surface boron content is 11.3%, iron level is 28.6%, and alloying element content from outward appearance to inner essence gradient reduction.After testing, surface hardness 960 Hv.Without hydrogen embrittlement.
Claims (1)
1. a surface has the co-infiltration method of the titanium alloy gear of ferro-boron infiltration layer, described titanium alloy gear contains alpha+beta titanium alloys gear, described co-infiltration method oozes technology altogether at alpha+beta titanium alloys gear surface using plasma ferro-boron, using alpha+beta titanium alloys gear as workpiece (2), FeB is as source electrode (3), with being placed on cathode tray (1), gear is in cathode tray (1) central authorities, source electrode is in around, between the two apart from being 10 ~ 30mm, form workpiece-source electrode integrative-structure;
DC power system (5) is made up of a high-voltage DC power supply, and negative pole is connected on cathode tray (1), and positive pole is connected on the vacuum vessel (4) of ground connection;
After vacuum vessel (4) being evacuated down to final vacuum by pumped vacuum systems (6), being filled with argon gas by inlet system (7) and making vacuum vessel (4) internal gas pressure rise to 13.3 Pa ~ 133.3 Pa;
DC power system (5) applies voltage-500V ~-800V on workpiece (2) and source electrode (3), produces Hollow cathode discharge, thus heated parts (2) and source electrode (3); After workpiece (2) is warming up to 850 DEG C ~ 950 DEG C, insulation 3 ~ 10h; The migration of the boron be sputtered out, iron ion, atom and particle cluster is adsorbed and diffuses in gear, forms alloy layer; Insulation terminates rear slow cooling to room temperature, obtain surface and there is the wear-resistant alloy layer that a layer thickness is 0.02-0.1mm, its surface boron content is 10% ~ 12%, iron level is 20 ~ 30%, and the alloying element content from outward appearance to inner essence titanium alloy gear of ferro-boron co-penetration layer that reduces of gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310091832.4A CN103147037B (en) | 2013-03-21 | 2013-03-21 | Titanium alloy gear with ferroboron diffusion layer on surface and co-diffusion method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310091832.4A CN103147037B (en) | 2013-03-21 | 2013-03-21 | Titanium alloy gear with ferroboron diffusion layer on surface and co-diffusion method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103147037A CN103147037A (en) | 2013-06-12 |
| CN103147037B true CN103147037B (en) | 2015-04-08 |
Family
ID=48545349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310091832.4A Expired - Fee Related CN103147037B (en) | 2013-03-21 | 2013-03-21 | Titanium alloy gear with ferroboron diffusion layer on surface and co-diffusion method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103147037B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483610B (en) * | 2015-11-27 | 2018-02-09 | 燕山大学 | A kind of surface peening titanium alloy oozes iron method |
| CN105485299A (en) * | 2015-12-28 | 2016-04-13 | 青海模具制造科技有限公司 | High-temperature-resistant, wear-resistant and high-strength gear |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632159A (en) * | 2005-01-07 | 2005-06-29 | 太原理工大学 | Thermal electron reinforced ionic boronizing device and process |
| CN101798667A (en) * | 2009-02-11 | 2010-08-11 | 波音公司 | Be used for the hardened titanium structure that transmitting gear is used |
-
2013
- 2013-03-21 CN CN201310091832.4A patent/CN103147037B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632159A (en) * | 2005-01-07 | 2005-06-29 | 太原理工大学 | Thermal electron reinforced ionic boronizing device and process |
| CN101798667A (en) * | 2009-02-11 | 2010-08-11 | 波音公司 | Be used for the hardened titanium structure that transmitting gear is used |
Non-Patent Citations (1)
| Title |
|---|
| 马连军,等.温度对等离子渗硼源极溅射行为及渗硼层成分的影响.《2008年中国机械工程学会年会暨甘肃省学术年会文集》.2008,637-641. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103147037A (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105839046B (en) | A kind of method of surface of steel workpiece efficient cryogenic Rapid Ion Nitriding | |
| CN101737479B (en) | Wear-resistant gear with alloy steel on surface | |
| CN1305023A (en) | Plasma surface-alloying process for titanium alloy | |
| CN106086774B (en) | A kind of processing method on iron composite cooker and its surface | |
| CN106083203B (en) | Surface nitriding method of ternary layered ceramic | |
| CN103147037B (en) | Titanium alloy gear with ferroboron diffusion layer on surface and co-diffusion method thereof | |
| CN103590002A (en) | Preparation method for Al-Cr coating on nickel-based superalloy | |
| CN104862649A (en) | Preparation method for gradient titanium alloy-surface Ni/TiN composite modification layer | |
| CN101195913A (en) | Technique for forming chromium carbon nitrogen surface alloying layer by plasma composite process low-temperature | |
| CN104911533A (en) | Low-temperature anti-corrosion gas nitriding method for metal workpiece and metal workpiece | |
| CN101736283A (en) | Composite processing device and processing method for nitriding and oxidizing surface of low-alloy steel | |
| CN101736286A (en) | Dysprosium-containing plasma surface low-alloy high-speed steel | |
| CN105734487B (en) | A kind of method that titanium alloy gear surface prepares obdurability molybdenum gradient modified layer | |
| CN104109842A (en) | Surface hafnium-permeated+carburized high-temperature-resistant stainless steel and preparation method thereof | |
| CN106756768A (en) | A kind of surface reinforcing method of the double brightness plasma nitridings of zirtan | |
| CN1166808C (en) | Plasma co-diffusion process of metal and non-metal elements | |
| CN103225058A (en) | High-temperature-oxidation-resistant austenitic stainless steel and preparation method thereof | |
| CN104532197A (en) | Composite coating prepared through ion implantation of Al on steel surface after double-glow Cr alloying and preparation method of composite coating | |
| CN1174112C (en) | Dual-layer glow ion carbonizing apparatus and process | |
| CN109306464B (en) | Gradient ceramic wear-resistant alloy layer with Ti/CrN composite structure and preparation method thereof | |
| CN101709449A (en) | Surface oxidation treatment device and method of aluminum alloy | |
| CN111593296A (en) | Martensitic stainless steel surface hardening agent and preparation method and application method thereof | |
| CN107794490A (en) | In the method that Q235 steel surfaces prepare boron carbon compisite seeping layer | |
| CN109440057A (en) | Pulsed plasma boron-nitriding Processes and apparatus | |
| CN104109830A (en) | Surface hafnium-infiltrated austenitic stainless steel resistant to high temperature and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |