CN105414426A - Hot rotary forging method of zinc alloy small-specification pipe or rod - Google Patents
Hot rotary forging method of zinc alloy small-specification pipe or rod Download PDFInfo
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- CN105414426A CN105414426A CN201510923197.0A CN201510923197A CN105414426A CN 105414426 A CN105414426 A CN 105414426A CN 201510923197 A CN201510923197 A CN 201510923197A CN 105414426 A CN105414426 A CN 105414426A
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- hot
- kirsite
- swage
- pipe
- bar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon
Abstract
The invention discloses a hot rotary forging method of a zinc alloy small-specification pipe or rod. The method comprises the following steps: a zinc alloy pipe blank or a zinc alloy rod blank performs multiple times of hot rotary forging under the condition of a temperature of 150-250 DEG C to correspondingly obtain a zinc alloy pipe with an outer diameter not bigger than 6 mm or a zinc alloy rod with a diameter not bigger than 6 mm; the zinc alloy pipe blank or the zinc alloy rod blank is immediately annealed in the hot rotary forging process; the total deformation quantity before the first time of immediate annealing treatment is controlled within 50-70%; and the total deformation quantity between adjacent two times of immediate annealing treatment is 50-70%. The hot rotary forging method is adopted to prepare the zinc alloy small-specification pipe/rod; and as a zinc alloy can generate higher pressing deformation under hot working, the single-pass machining deformation quantity is increased, the grain refinement is realized to uniformly distribute second phases, and the mechanical performance of the zinc alloy small-specification pipe/rod is promoted.
Description
Technical field
The invention belongs to the forming processing technology field of small dimension non-ferrous metal tube, bar, be specifically related to a kind of hot-swage method of kirsite small specification tube or bar.
Background technology
High performance small dimension kirsite pipe, bar are desirable degradable medical metal materials, have good market application foreground.But kirsite is Patterns for Close-Packed Hexagonal Crystal structure, and temperature-room type plasticity deformability is poor, easily there is grain growth and hot tearing again in high temperature deformation, plastic deformation temperatures interval is narrow.Common production small dimension metal tube, the method for bar have rolling, drawing and extruding.But, rolling be difficult to adopt hot-working to cause that pass deformation is limited, manufacturing procedure is various and small dimension time be difficult to controlling distortion amount; Tension stress during drawing, single pass heavy deformation is often less than 20% and easily produces defect; Extruding normally as the process preparing small dimension kirsite pipe, excellent blank, as existing continuous casting and extrusion (CN102814478A) and the small dimension kirsite pipe, the bar that are all difficult to prepare external diameter or below diameter 6mm to the processing method that cast zinc alloy carries out continuously extruded (CN101698205A).
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of hot-swage method of kirsite small specification tube or bar.Under the method utilizes hot-working, kirsite can produce larger compressive strain, improves the machining deformation amount of single pass, realizes crystal grain thinning, second-phase is uniformly distributed, thus promotes the mechanical property of kirsite small specification tube/bar; Adopt kirsite small specification tube/bar of preparing of the method, tensile strength, yield strength and percentage elongation comparatively improve 16% ~ 30%, 21% ~ 33% and 10% ~ 21% before hot-swage respectively.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of hot-swage method of kirsite small specification tube or bar, it is characterized in that, the method comprises: by kirsite pipe or kirsite rod base be carry out multi-pass hot-swage under the condition of 150 DEG C ~ 250 DEG C in temperature, obtains external diameter accordingly and is not more than the Zinc alloy bar that the kirsite tubing of 6mm or diameter be not more than 6mm; Carry out intermediate annealing process to kirsite pipe or kirsite rod base in hot-swage process, controlling first time intermediate annealing total deformation before treatment is 50% ~ 70%, and the total deformation between adjacent twice intermediate annealing process is 50% ~ 70%; The pass deformation of described hot-swage is 10% ~ 40%, and total deformation is not less than 70%; The diameter of the external diameter of described kirsite pipe and kirsite rod base is all not more than 25mm.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, it is characterized in that, after a time hot-swage, oil removal treatment is carried out to kirsite pipe before intermediate annealing process, after all the other passage hot-swages, all oil removal treatment and pickling processes are carried out to kirsite pipe; Directly intermediate annealing process is carried out to kirsite rod base after a time hot-swage before intermediate annealing process, after all the other passage hot-swages, all mechanical grinding is carried out to kirsite rod base.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, it is characterized in that, after described intermediate annealing process, pickling is carried out to the kirsite pipe through intermediate annealing process and remove surface scale, after described intermediate annealing process, polishing is carried out to the kirsite rod base through intermediate annealing process and remove surface scale.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, is characterized in that, the temperature of described intermediate annealing process is 150 DEG C ~ 300 DEG C, and temperature retention time is 30min ~ 60min.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, it is characterized in that, when the external diameter of described kirsite pipe or the diameter of kirsite rod base are 10mm ~ 25mm, the pass deformation of hot-swage is 10% ~ 40%, and pass deformation successively reduces, when the diameter of the kirsite rod base after the external diameter or hot-swage of the kirsite pipe after hot-swage is less than 10mm, the pass deformation controlling hot-swage is 10% ~ 30%, and pass deformation successively reduces.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, it is characterized in that, when the external diameter of described kirsite pipe or the diameter of kirsite rod base are less than 10mm, the pass deformation of hot-swage is 10% ~ 30%, and pass deformation successively reduces.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, is characterized in that, controlling the head speed of mainshaft of swaging in hot-swage process is 200r/min ~ 300r/min.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, is characterized in that, the feeding speed of described hot-swage is 3mm/s ~ 20mm/s.
Above-mentioned a kind of kirsite small specification tube or the hot-swage method of bar, is characterized in that, before the hot-swage of described kirsite pipe, on core bar uniform application by graphite powder and butter according to 1:(6 ~ 10) the lubricant that mixes of mass ratio.
The present invention compared with prior art has the following advantages:
1, the present invention adopts hot-swage legal system for kirsite small specification tube/bar, under utilizing hot-working, kirsite can produce larger compressive strain, improve the machining deformation amount of single pass, realize crystal grain thinning, second-phase is uniformly distributed, thus promote the mechanical property of kirsite small specification tube/bar.
2, the kirsite small specification tube/bar adopting method of the present invention to prepare, tensile strength, yield strength and percentage elongation comparatively improve 16% ~ 30%, 21% ~ 33% and 10% ~ 21% before hot-swage respectively.
3, method of the present invention is applicable to the preparation of kirsite tubing/bar, especially external diameter/diameter is not more than the kirsite small specification tube/bar of 6mm, and the technique avoiding existing kirsite small specification tube/bar preparation method existence is difficult to control and easily produce the problem of defect.
Below by embodiment, technical solution of the present invention is described in further detail.
Detailed description of the invention
Embodiment 1
With hot-swage legal system for external diameter 5.1mm, the Zn-0.1Mg-0.05Sr kirsite tubing of wall thickness 0.65mm is example, and method is as follows:
To external diameter 9mm, the Zn-0.1Mg-0.05Sr kirsite pipe of wall thickness 1.5mm carries out 7 passage hot-swages, obtaining external diameter is 5.1mm, wall thickness is the Zn-0.1Mg-0.05Sr kirsite tubing of 0.65mm, total deformation is 74.3%, the lubricant that before every time hot-swage, uniform application is mixed according to the mass ratio of 1:8 by graphite powder and butter on core bar, the feeding speed of hot-swage is 3mm/s ~ 12mm/s, and hot-swage technological parameter is in table 1;
The hot-swage technological parameter of table 1 embodiment 1
All oil removal treatment and pickling processes are carried out to kirsite pipe after 1st passage, the 2nd passage, the 4th passage, the 5th passage, the 6th passage and the 7th passage hot-swage; After 3rd passage hot-swage, oil removal treatment is carried out to kirsite pipe, then carry out the intermediate annealing process of 200 DEG C of insulation 30min, then carry out pickling and remove surface scale, then carry out the 4th passage hot-swage.
The tensile strength of Zn-0.1Mg-0.05Sr kirsite tubing prepared by the present embodiment is 305MPa, and yield strength is 254MPa, and percentage elongation is 20%, and tensile strength, yield strength and percentage elongation comparatively improve 16%, 21% and 18% before hot-swage respectively.
Embodiment 2
With hot-swage legal system for external diameter 5.9mm, the Zn-0.5Fe-0.03Ca kirsite tubing of wall thickness 0.6mm is example, and method is as follows:
To external diameter 16mm, the Zn-0.5Fe-0.03Ca kirsite pipe of wall thickness 2.5mm carries out 8 passage hot-swages, obtaining external diameter is 5.9mm, wall thickness is the Zn-0.5Fe-0.03Ca kirsite tubing of 0.6mm, total deformation is 90.6%, the lubricant that before every time hot-swage, uniform application is mixed according to the mass ratio of 1:6 by graphite powder and butter on core bar, the feeding speed of hot-swage is 8mm/s ~ 16mm/s, and hot-swage technological parameter is in table 2;
The hot-swage technological parameter of table 2 embodiment 2
All oil removal treatment and pickling processes are carried out to kirsite pipe after 1st passage, the 3rd passage, the 4th passage, the 6th passage, the 7th passage and the 8th passage hot-swage; After 2nd passage hot-swage, oil removal treatment is carried out to kirsite pipe, then carry out the intermediate annealing process of 230 DEG C of insulation 30min, then carry out pickling and remove surface scale, then carry out the 3rd passage hot-swage; After 5th passage hot-swage, oil removal treatment is carried out to kirsite pipe, then carry out the intermediate annealing process of 200 DEG C of insulation 40min, then carry out pickling and remove surface scale, then carry out the 6th passage hot-swage.
The tensile strength of Zn-0.5Fe-0.03Ca kirsite tubing prepared by the present embodiment is 280MPa, and yield strength is 206MPa, and percentage elongation is 17%, and tensile strength, yield strength and percentage elongation comparatively improve 27%, 26% and 13% before hot-swage respectively.
Embodiment 3
With hot-swage legal system for external diameter 5.9mm, the Zn-0.1Mg-0.05Sr kirsite tubing of wall thickness 0.6mm is example, and method is as follows:
To external diameter 25mm, the Zn-0.1Mg-0.05Sr kirsite pipe of wall thickness 5.5mm carries out 11 passage hot-swages, obtaining external diameter is 5.9mm, wall thickness is the Zn-0.1Mg-0.05Sr kirsite tubing of 0.6mm, total deformation is 97.0%, the lubricant that before every time hot-swage, uniform application is mixed according to the mass ratio of 1:10 by graphite powder and butter on core bar, the feeding speed of hot-swage is 10mm/s ~ 20mm/s, and hot-swage technological parameter is in table 3;
The hot-swage technological parameter of table 3 embodiment 3
All oil removal treatment and pickling processes are carried out to kirsite pipe after 1st passage, the 3rd passage, the 4th passage, the 6th passage, the 7th passage, the 9th passage, the 10th passage and the 11st passage hot-swage; After 2nd passage hot-swage, oil removal treatment is carried out to kirsite pipe, then carry out the intermediate annealing process of 250 DEG C of insulation 30min, then carry out pickling and remove surface scale, then carry out the 3rd passage hot-swage; After 5th passage hot-swage, oil removal treatment is carried out to kirsite pipe, then carry out the intermediate annealing process of 230 DEG C of insulation 40min, then carry out pickling and remove surface scale, then carry out the 6th passage hot-swage; After 8th passage hot-swage, oil removal treatment is carried out to kirsite pipe, then carry out the intermediate annealing process of 200 DEG C of insulation 40min, then carry out pickling and remove surface scale, then carry out the 9th passage hot-swage.
The tensile strength of Zn-0.1Mg-0.05Sr kirsite tubing prepared by the present embodiment is 313MPa, and yield strength is 233MPa, and percentage elongation is 22%, and tensile strength, yield strength and percentage elongation comparatively improve 30%, 33% and 16% before hot-swage respectively.
Embodiment 4
For the Zn-0.1Mg-0.05Sr Zinc alloy bar of hot-swage legal system for diameter 4.5mm, method is as follows:
6 passage hot-swages are carried out to the Zn-0.1Mg-0.05Sr kirsite rod base of diameter 9mm, obtain the Zn-0.1Mg-0.05Sr Zinc alloy bar that diameter is 4.5mm, total deformation is 75.0%, and the feeding speed of hot-swage is 3mm/s ~ 12mm/s, and hot-swage technological parameter is in table 4;
The hot-swage technological parameter of table 4 embodiment 4
All mechanical grinding is carried out to kirsite rod base after 1st passage, the 2nd passage, the 4th passage, the 5th passage and the 6th passage hot-swage; After 3rd passage hot-swage, kirsite rod base is carried out to the intermediate annealing process of 150 DEG C of insulation 60min, then carry out polishing and remove surface scale, then carry out the 4th passage hot-swage.
The tensile strength of Zn-0.1Mg-0.05Sr Zinc alloy bar prepared by the present embodiment is 302MPa, and yield strength is 243MPa, and percentage elongation is 21%, and tensile strength, yield strength and percentage elongation comparatively improve 21%, 23% and 10% before hot-swage respectively.
Embodiment 5
For the Zn-0.1Mg-0.05Sr Zinc alloy bar of hot-swage legal system for diameter 5.4mm, method is as follows:
8 passage hot-swages are carried out to the Zn-0.1Mg-0.05Sr kirsite rod base of diameter 18mm, obtain the Zn-0.1Mg-0.05Sr Zinc alloy bar that diameter is 5.4mm, total deformation is 91.0%, and the feeding speed of hot-swage is 8mm/s ~ 16mm/s, and hot-swage technological parameter is in table 5;
The hot-swage technological parameter of table 5 embodiment 5
All mechanical grinding is carried out to kirsite rod base after 1st passage, the 3rd passage, the 4th passage, the 6th passage, the 7th passage and the 8th passage hot-swage; After 2nd passage hot-swage, kirsite rod base is carried out to the intermediate annealing process of 250 DEG C of insulation 30min, then carry out polishing and remove surface scale, then carry out the 3rd passage hot-swage; After 5th passage hot-swage, kirsite rod base is carried out to the intermediate annealing process of 200 DEG C of insulation 40min, then carry out polishing and remove surface scale, then carry out the 6th passage hot-swage.
The tensile strength of Zn-0.1Mg-0.05Sr Zinc alloy bar prepared by the present embodiment is 314MPa, and yield strength is 252MPa, and percentage elongation is 21%, and tensile strength, yield strength and percentage elongation comparatively improve 29%, 33% and 18% before hot-swage respectively.
Embodiment 6
For the Zn-0.5Fe-0.03Ca Zinc alloy bar of hot-swage legal system for diameter 5.8mm, method is as follows:
10 passage hot-swages are carried out to the Zn-0.5Fe-0.03Ca kirsite rod base of diameter 24.5mm, obtain the Zn-0.1Mg-0.05Sr Zinc alloy bar that diameter is 5.8mm, total deformation is 94.4%, and the feeding speed of hot-swage is that 8mm/s ~ 20mm/s hot-swage technological parameter is in table 6;
The hot-swage technological parameter of table 6 embodiment 6
All mechanical grinding is carried out to kirsite rod base after 1st passage, the 3rd passage, the 4th passage, the 6th passage, the 7th passage, the 8th passage and the 10th passage hot-swage; After 2nd passage hot-swage, kirsite rod base is carried out to the intermediate annealing process of 300 DEG C of insulation 30min, then carry out polishing and remove surface scale, then carry out the 3rd passage hot-swage; After 5th passage hot-swage, kirsite rod base is carried out to the intermediate annealing process of 250 DEG C of insulation 40min, then carry out polishing and remove surface scale, then carry out the 6th passage hot-swage; After 9th passage hot-swage, kirsite rod base is carried out to the intermediate annealing process of 150 DEG C of insulation 30min, then carry out polishing and remove surface scale, then carry out the 10th passage hot-swage.
The tensile strength of Zn-0.5Fe-0.03Ca Zinc alloy bar prepared by the present embodiment is 296MPa, and yield strength is 237MPa, and percentage elongation is 17%, and tensile strength, yield strength and percentage elongation comparatively improve 26%, 30% and 21% before hot-swage respectively.
The above; it is only preferred embodiment of the present invention; not any restriction is done to the present invention, every above embodiment is done according to invention technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (9)
1. the hot-swage method of a kirsite small specification tube or bar, it is characterized in that, the method comprises: by kirsite pipe or kirsite rod base be carry out multi-pass hot-swage under the condition of 150 DEG C ~ 250 DEG C in temperature, obtains external diameter accordingly and is not more than the Zinc alloy bar that the kirsite tubing of 6mm or diameter be not more than 6mm; Carry out intermediate annealing process to kirsite pipe or kirsite rod base in hot-swage process, controlling first time intermediate annealing total deformation before treatment is 50% ~ 70%, and the total deformation between adjacent twice intermediate annealing process is 50% ~ 70%; The pass deformation of described hot-swage is 10% ~ 40%, and total deformation is not less than 70%; The diameter of the external diameter of described kirsite pipe and kirsite rod base is all not more than 25mm.
2. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, it is characterized in that, after a time hot-swage, oil removal treatment is carried out to kirsite pipe before intermediate annealing process, after all the other passage hot-swages, all oil removal treatment and pickling processes are carried out to kirsite pipe; Directly intermediate annealing process is carried out to kirsite rod base after a time hot-swage before intermediate annealing process, after all the other passage hot-swages, all mechanical grinding is carried out to kirsite rod base.
3. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, it is characterized in that, after described intermediate annealing process, pickling is carried out to the kirsite pipe through intermediate annealing process and remove surface scale, after described intermediate annealing process, polishing is carried out to the kirsite rod base through intermediate annealing process and remove surface scale.
4. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, is characterized in that, the temperature of described intermediate annealing process is 150 DEG C ~ 300 DEG C, and temperature retention time is 30min ~ 60min.
5. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, it is characterized in that, when the external diameter of described kirsite pipe or the diameter of kirsite rod base are 10mm ~ 25mm, the pass deformation of hot-swage is 10% ~ 40%, and pass deformation successively reduces, when the diameter of the kirsite rod base after the external diameter or hot-swage of the kirsite pipe after hot-swage is less than 10mm, the pass deformation controlling hot-swage is 10% ~ 30%, and pass deformation successively reduces.
6. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, it is characterized in that, when the external diameter of described kirsite pipe or the diameter of kirsite rod base are less than 10mm, the pass deformation of hot-swage is 10% ~ 30%, and pass deformation successively reduces.
7. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, is characterized in that, controlling the head speed of mainshaft of swaging in hot-swage process is 200r/min ~ 300r/min.
8. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, is characterized in that, the feeding speed of described hot-swage is 3mm/s ~ 20mm/s.
9. the hot-swage method of a kind of kirsite small specification tube according to claim 1 or bar, it is characterized in that, before the hot-swage of described kirsite pipe, on core bar uniform application by graphite powder and butter according to 1:(6 ~ 10) the lubricant that mixes of mass ratio.
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| CN106756680A (en) * | 2016-11-23 | 2017-05-31 | 西北有色金属研究院 | A kind of processing method of high-strength magnesium alloy small-sized bar |
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| CN111375713A (en) * | 2018-12-27 | 2020-07-07 | 南京理工大学 | Rotary swaging preparation method of high-strength aluminum conductor |
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| CN106862298B (en) * | 2017-02-15 | 2018-08-24 | 西安爱德万思医疗科技有限公司 | A kind of preparation method of the degradable kirsite capillary silk material of medical bio |
| CN108262368A (en) * | 2017-08-21 | 2018-07-10 | 广东省材料与加工研究所 | A kind of preparation method of high-performance medical magnesium alloy thin-wall pipes |
| CN108300952A (en) * | 2017-08-21 | 2018-07-20 | 广东省材料与加工研究所 | A kind of preparation method of medical magnesium alloy bracket |
| CN108300952B (en) * | 2017-08-21 | 2019-12-10 | 广东省材料与加工研究所 | preparation method of medical magnesium alloy stent |
| CN111375713A (en) * | 2018-12-27 | 2020-07-07 | 南京理工大学 | Rotary swaging preparation method of high-strength aluminum conductor |
| CN110743933A (en) * | 2019-10-29 | 2020-02-04 | 西北有色金属研究院 | Thermal processing method of medical cobalt-based alloy small and micro pipe |
| CN111687237A (en) * | 2020-06-18 | 2020-09-22 | 成都先进金属材料产业技术研究院有限公司 | Cold rolling method of thick-wall capillary titanium alloy seamless pipe |
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| CN105414426B (en) | 2017-07-04 |
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