CN106881367A - A kind of Ti-Ni base memorial alloys hot extrusion lubricating method - Google Patents
A kind of Ti-Ni base memorial alloys hot extrusion lubricating method Download PDFInfo
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- CN106881367A CN106881367A CN201510930801.2A CN201510930801A CN106881367A CN 106881367 A CN106881367 A CN 106881367A CN 201510930801 A CN201510930801 A CN 201510930801A CN 106881367 A CN106881367 A CN 106881367A
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- extrusion
- base memorial
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
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Abstract
The present invention relates to a kind of Ti-Ni base memorial alloys hot extrusion lubricating method, belong to Ti-Ni base memorial alloy manufacture fields.Nickel metal layer is formed on Ti-Ni base memorial alloy extrusion billets surface using thermal spraying mode, the nickel metal layer serves as metal lubrication layer in extrusion process, reaches the effect of extruding lubrication.First, Ti-Ni base memorial alloy workpiece are stripped off the skin, flush end mouthful machining obtains extrusion billet；Extrusion billet is carried out into surface sand-blasting process again；Then thermal spraying is carried out on the surface of extrusion billet, obtains the Ti-Ni base memorial alloy extrusion billets that surface covers nickel metal layer.Nickel metal layer serves as metal lubrication layer in extrusion process, reach the effect of extruding lubrication, lubricating system of the invention can reach the lubricating requirement of the materials such as the positive/negative extruded tube of Ti-Ni base memorial alloys, rod, process up-to-standard Ti-Ni base memorial alloys squeeze wood.
Description
Technical field
The present invention relates to a kind of Ti-Ni base memorial alloys hot extrusion lubricating method, specially a kind of Ti-Ni base memorial alloys
Lubricating method when hot extrusion is processed, belongs to Ti-Ni base memorial alloy manufacture fields.
Background technology
Marmem is the SMART METALS to wait atomic ratio TiNi alloy system to be representative, with unique shape memory
Characteristic.SME is that recovery to initial shape occurs after alloy deforms at low temperature when being heated to more than certain critical-temperature
A kind of property of shape.Using preparing various drivings, executive component, mesh in the characteristic engineering of shape memory alloy material
It is preceding to be widely used in mechanically and automatically chemical industry.Wherein, marmem pipe joint is its Typical Representative, and it is former
Reason is expanding at low temperature by the pipe joint of certain size also with memory recovery characteristic, its internal diameter size is become big, and is connect
Ligament coordinates, and pipe joint is replied due to its SME, pipe joint after intensification, and internal diameter starts extensive to original inner diameter
It is multiple, so as to being produced contact and being held tightly by adapter, make pipeline be fastenedly connected and seal.At present, pipe joint of memory alloy space flight,
Military industry field is used widely.
By material, structural state is determined the quality of the characteristics such as the memory performance of Ti-Ni base memorial alloys in itself, and appropriate
Processing method be guarantee that material obtains good organization state.Hot-extrusion is the conventional processing mode of metal material, it
It is the effective industrialized production means of conventional metals the features such as aximal deformation value with short route.But at present, using conventional junction
The hot-extrusion method of structure titanium alloy cannot produce up-to-standard Ti-Ni base memorial alloys squeeze wood (particularly tubing).Institute
With current widely used Ti-Ni base memorial alloys aviation pipe joint majority obtained by bar turnery processing, the technique elder generation
Hammer cogging, drilling, rolling, then reheating/cold-drawn is into required moulding pipe, and work flow is tediously long；While this processing mode
It is not only serious to waste material, particularly, when some major diameter pipeline connecting parts are developed, good tissue can't be obtained
State.Therefore solving Ti-Ni base memorial alloys extrusion process turns into the important content for solving and extending its engineer applied.
Solve the problems, such as that Ti-Ni base memorial alloys extrusion process will most importantly solve to be lubricated in extrusion process.Ti-Ni
Base memorial alloy resistance of deformation in hot-working is interval is big, using conventional titanium alloy extruding lubricating process (e.g., glass lubrication, gold
Category jacket method (copper, iron etc.)) extrusion process lubrication problem can not be effectively solved, Ti-Ni base memorial alloys can go out in extrusion process
The problems such as showing the bad caused surface drawing crack line of lubricating condition, gnaw mould, vexed car, referring to Fig. 1-a to Fig. 1-c.Therefore, the present invention
The method as the lubricating layer of hot extrusion in Ti-Ni base memorial alloy blank surface thermal spraying layer of metal nickel is proposed, is solved simultaneously
Realize Ti-Ni base memorial alloy hot extrusion process lubricating process problems.
The content of the invention
It is an object of the invention to provide a kind of method that can improve Ti-Ni base memorial alloy hot extrusion pressure lubricatings, realize
The hot extrusion technique of Ti-Ni base memorial alloys.
To achieve the above object, the present invention takes following technical scheme：
A kind of Ti-Ni base memorial alloys hot extrusion lubricating method：Before hot extrusion processing, existed using thermal spraying mode
Ti-Ni base memorial alloy extrusion billets surface forms nickel metal layer, and the nickel metal layer serves as metal lubrication layer in extrusion process,
Reach the effect of extruding lubrication.
Above-mentioned Ti-Ni base memorial alloys extrusion billet was handled as follows in advance before thermal spraying is carried out：
(1) Ti-Ni base memorial alloy workpiece are stripped off the skin, the machining such as flush end mouthful obtains extrusion billet；
(2) extrusion billet is carried out into the blank that the techniques such as pickling or surface sand-blasting obtain the clean non-scale in surface.
The thickness of described nickel metal layer can be 0.1-2.0mm, preferably 0.5-1.0mm.
The Ti-Ni base memorial alloy extrusion billets of the surface covering nickel metal layer that above-mentioned lubricating method is obtained are extruded
Processing, then removes the nickel metal layer of surface attachment, obtains the good Ti-Ni base memorial alloys bar of surface quality, tubing or T
Section bar etc..
In the inventive method, first, cause that Ti-Ni base memorial alloys extrusion billet covers one layer of nickel using thermal spraying mode
Sprayed coating, the sprayed coating can play the work of Ti-Ni base memorial alloy extrusion billet ORCs during blank heating
With.Second, because Ti-Ni base memorial alloy materials contain nickel element in itself, nickel dam can be reduced in heating and extrusion process
To the diffusion velocity of Ti-Ni alloy blanks, reduce lubricating layer metallic element and dirt is spread to the chemical element of Ti-Ni base memorial alloys
Dye.3rd, the nickel metal layer adhered to using spraying method has certain adhesion with blank matrix, can be improved in extrusion process
The adhesive force of lubricated metal layer, lubricated metal layer integrality is more can guarantee that than the method for conventional metals jacket.
The present invention provides Ti-Ni base memorial alloy hot extrusion lubricating methods can improve Ti-Ni base memorial alloy hot extrusions
The lubrication circumstances of process, realize that the hot extrusions such as Ti-Ni base memorial alloys material bar, pipe are processed.
The beneficial effect that is reached of the present invention is：The Ti-Ni base memorial alloy hot extrusion lubricating methods are effectively improved Ti-Ni
Lubrication operating mode during base memorial alloy hot extrusion, realizes the hot extrusions such as Ti-Ni base memorial alloys material bar, pipe processing, fills up
The blank of the hot extrusion process technologies of processing such as Ti-Ni base memorial alloys pipe, rod.
Below by specific embodiment, the present invention will be further described, but is not meant to the scope of the present invention
Limitation.
Brief description of the drawings
Fig. 1-a to Fig. 1-c are the extruding problem produced using conventional lubrication mode, wherein, Fig. 1-a：Draw on squeeze wood surface
Crackle, Fig. 1-b：Mould bites seriously, Fig. 1-c：Vexed car.
Fig. 2-a to Fig. 2-c are the outward appearance of the product using lubricating method of the present invention, wherein, Fig. 2-a：Ti44Ni47Nb9Extruding
Bar；Fig. 2-b：Traditional glass lubrication (on) and the hot extrusion TiNi for lubricating of the invention50.8Compo pipe surface quality is contrasted；Fig. 2-
c：Ti50Ni47Fe3Memorial alloy extrudes T profile.
Specific embodiment
Ti-Ni base memorial alloys hot extrusion lubricating method of the present invention, comprises the following specific steps that：
(1) Ti-Ni base memorial alloy workpiece are stripped off the skin, the machining such as flush end mouthful obtains extrusion billet；
(2) extrusion billet is carried out into the blank that the techniques such as pickling or surface sand-blasting obtain the clean non-scale in surface；
(3) thermal spraying and then on the surface of extrusion billet is carried out, the Ti-Ni bases memory for obtaining surface covering nickel metal layer is closed
Golden extrusion billet.
Extrusion billet by carrying out extrusion process again after the treatment of surface spraying nickel dam.
Embodiment 1
Ti is realized on 850 tons, the extruder of a diameter of 95mm of recipient44Ni47Nb9Memorial alloy 20mm bar hot extrusions
Technique.
Comprise the concrete steps that：
The first step：Machining extrusion billet
In the Ti of diameter 100mm44Ni47Nb9200mm extrusion billets long are intercepted on memorial alloy ingot casting blank.Machining is taken off
Skin, planar end surface processing extrusion billet；Because extrusion billet will reserve later stage spraying nickel layer thickness, outside this processing extrusion billet
Footpath is 90mm.
Second step：Blasting treatment
Machining blank surface oil stain is removed using blasting treatment mode, and blank is formed coarse surface.
3rd step：Thermal spraying nickel dam
In Ti by the way of thermal spraying44Ni47Nb9The surface of memorial alloy extrusion billet forms the thick nickel sprays of one layer of 1mm
Coating.
4th step：Extruding
Selection proper mold, and to Ti in the range of following squeezing parameters44Ni47Nb9Memorial alloy extrusion billet is squeezed
Pressure.Specifically squeezing parameter is：
Extrusion temperature： 950℃
Extrusion speed： 70-85mm/s
Recipient temperature： 300-400℃
Extruding is smoothed out, and obtains 20mmTi44Ni47Nb9Memorial alloy extruded barses, as shown in Fig. 2-a.Surface of Rod Bar is still
It is so complete to adhere to nickel dam；After removing the nickel dam of surface attachment, Ti44Ni47Nb9Memorial alloy surface quality is good.
Embodiment 2
TiNi is realized on 850 tons, the extruder of a diameter of 95mm of recipient50.8Memorial alloy external diameter 44mm, internal diameter
The extruding of 24mm tubing.
The first step：Machining extrusion billet
In the TiNi of diameter 100mm50.8200mm extrusion billets long are intercepted on memorial alloy ingot casting blank.Machining strip off the skin,
Planar end surface processes extrusion billet；Because extrusion billet will reserve later stage spraying nickel layer thickness, this processing extrusion billet external diameter
It is 92mm, prefabricated endoporus is 24mm.
Second step：Blasting treatment
Machining blank surface oil stain is removed using blasting treatment mode, and blank is formed coarse surface.
3rd step：Thermal spraying nickel dam
In TiNi by the way of thermal spraying50.8The surface of memorial alloy extrusion billet forms the thick nickel sprays of one layer of 0.5mm
Coating.
4th step：Extruding
Selection proper mold and extruding plug, and to TiNi in the range of following squeezing parameters50.8Memorial alloy extruded stock
Material is extruded.Specifically squeezing parameter is：
Extrusion temperature： 920℃
Extrusion speed： 60-85mm/s
Recipient temperature：- 400 DEG C of room temperature
Extruding is smoothed out, and obtains external diameter 44mm, the TiNi of internal diameter 24mm50.8Memorial alloy extrudes tubing.
Tube surfaces still completely adhere to nickel dam；After removing the nickel dam of surface attachment, TiNi50.8Memorial alloy surface quality
Well, referring to the bottom of Fig. 2-b, the top of figure is the TiNi using traditional glass lubricating method hot extrusion50.8Alloy pipe surface.
Embodiment 3
Ti is realized on 500 tons, the extruder of a diameter of 95mm of recipient50Ni47Fe3Memorial alloy external diameter T profile squeeze
Pressure processing.
The first step：Machining extrusion billet
In the Ti of diameter 100mm50Ni47Fe3200mm extrusion billets long are intercepted on memorial alloy ingot casting blank.Machining is taken off
Skin, planar end surface processing extrusion billet；The thickness of later stage spraying nickel dam is reserved due to extrusion billet, this processing extrusion billet
External diameter is 91mm.
Second step：Blasting treatment
Machining blank surface oil stain is removed using blasting treatment mode, and blank is formed coarse surface.
3rd step：Thermal spraying nickel dam
In Ti by the way of thermal spraying50Ni47Fe3The surface of memorial alloy extrusion billet forms the thick nickel of one layer of 0.75mm
Sprayed coating.
4th step：Backward extrusion
Selection proper mold, and to Ti in the range of following squeezing parameters50Ni47Fe3Memorial alloy extrusion billet is squeezed
Pressure.Specifically squeezing parameter is：
Extrusion temperature： 900℃
Extrusion speed： 75-85mm/s
Recipient temperature： 350-400℃
Extruding is smoothed out, and obtains Ti50Ni47Fe3Memorial alloy extrudes T profile, as shown in fig. 2-c.
The present invention is different from traditional glass dust lubrication and jacket lubrication etc., employs the extruding lubrication of spraying nickel metal layer
Mode, nickel metal layer serves as metal lubrication layer in extrusion process, reaches the effect of extruding lubrication, can improve Ti-Ni bases note
Recall the lubrication circumstances of alloy hot extrusion process, reach the lubricating requirement of the materials such as the positive/negative extruded tube of Ti-Ni base memorial alloys, rod,
Process up-to-standard Ti-Ni base memorial alloys squeeze wood.
Claims (4)
1. a kind of Ti-Ni base memorial alloys hot extrusion lubricating method, it is characterised in that：Remembered in Ti-Ni bases using thermal spraying mode
Recall alloy extrusion blank surface and form nickel metal layer.
2. Ti-Ni base memorial alloys hot extrusion lubricating method according to claim 1, it is characterised in that：Described nickel gold
The thickness for belonging to layer is 0.1-2.0mm.
3. Ti-Ni base memorial alloys hot extrusion lubricating method according to claim 2, it is characterised in that：Described nickel gold
The thickness for belonging to layer is 0.5-1.0mm.
4. Ti-Ni base memorial alloys hot extrusion lubricating method according to claim 1, it is characterised in that：Described Ti-Ni
Base memorial alloy extrusion billet was handled as follows in advance before thermal spraying is carried out：
(1) Ti-Ni base memorial alloy workpiece are stripped off the skin, flush end mouthful machining obtains extrusion billet；
(2) extrusion billet is carried out into pickling or surface sand-blasting, obtains the blank of the clean non-scale in surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510930801.2A CN106881367A (en) | 2015-12-15 | 2015-12-15 | A kind of Ti-Ni base memorial alloys hot extrusion lubricating method |
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| CN201510930801.2A CN106881367A (en) | 2015-12-15 | 2015-12-15 | A kind of Ti-Ni base memorial alloys hot extrusion lubricating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088979A (en) * | 2021-04-15 | 2021-07-09 | 山东省科学院新材料研究所 | Pretreatment method of magnesium alloy low-temperature extrusion blank |
| CN114540892A (en) * | 2022-03-28 | 2022-05-27 | 西部金属材料股份有限公司 | Surface treatment method of titanium alloy ingot blank |
| CN115870498A (en) * | 2022-12-06 | 2023-03-31 | 浙江福达合金材料科技有限公司 | Preparation method for improving bonding strength of flaky silver tin oxide electrical contact material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613614A (en) * | 1984-06-19 | 1986-01-09 | Hitachi Metals Ltd | Manufacture of shape memory alloy |
| JPH03107444A (en) * | 1989-09-21 | 1991-05-07 | Kobe Steel Ltd | Manufacture of cu-al-ni series shape memory alloy |
| CN1701871A (en) * | 2005-05-10 | 2005-11-30 | 江苏法尔胜技术开发中心 | Lubrication impact extrusion forming method of nickel titanium-base shape memory alloy tubing glass |
| CN101733304A (en) * | 2008-11-25 | 2010-06-16 | 北京有色金属研究总院 | TiNi base shape memory alloy tube hydraulic extrusion moulding method |
| CN105008063A (en) * | 2013-03-15 | 2015-10-28 | Ati资产公司 | Methods to improve hot workability of metal alloys |
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2015
- 2015-12-15 CN CN201510930801.2A patent/CN106881367A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613614A (en) * | 1984-06-19 | 1986-01-09 | Hitachi Metals Ltd | Manufacture of shape memory alloy |
| JPH03107444A (en) * | 1989-09-21 | 1991-05-07 | Kobe Steel Ltd | Manufacture of cu-al-ni series shape memory alloy |
| CN1701871A (en) * | 2005-05-10 | 2005-11-30 | 江苏法尔胜技术开发中心 | Lubrication impact extrusion forming method of nickel titanium-base shape memory alloy tubing glass |
| CN101733304A (en) * | 2008-11-25 | 2010-06-16 | 北京有色金属研究总院 | TiNi base shape memory alloy tube hydraulic extrusion moulding method |
| CN105008063A (en) * | 2013-03-15 | 2015-10-28 | Ati资产公司 | Methods to improve hot workability of metal alloys |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088979A (en) * | 2021-04-15 | 2021-07-09 | 山东省科学院新材料研究所 | Pretreatment method of magnesium alloy low-temperature extrusion blank |
| CN113088979B (en) * | 2021-04-15 | 2024-03-22 | 山东省科学院新材料研究所 | Pretreatment method for magnesium alloy low-temperature extrusion blank |
| CN114540892A (en) * | 2022-03-28 | 2022-05-27 | 西部金属材料股份有限公司 | Surface treatment method of titanium alloy ingot blank |
| CN114540892B (en) * | 2022-03-28 | 2023-09-15 | 西部金属材料股份有限公司 | Surface treatment method for titanium alloy ingot blank |
| CN115870498A (en) * | 2022-12-06 | 2023-03-31 | 浙江福达合金材料科技有限公司 | Preparation method for improving bonding strength of flaky silver tin oxide electrical contact material |
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Application publication date: 20170623 |