CN86106477A - The method of double-deck jacket extruding titanium alloy - Google Patents
The method of double-deck jacket extruding titanium alloy Download PDFInfo
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- CN86106477A CN86106477A CN86106477.1A CN86106477A CN86106477A CN 86106477 A CN86106477 A CN 86106477A CN 86106477 A CN86106477 A CN 86106477A CN 86106477 A CN86106477 A CN 86106477A
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Abstract
The method of double-deck jacket extruding titanium alloy.Diameter is big when producing, during the titanium alloy pipe of function admirable, extrusion billet adopts double-deck jacket.The internal layer jacket is made of soft sheet metal, and outer jacket is made of soft red copper sheet.The extruding titanium alloy is heated to be suitable at it usually below the transformation temperature.Frictional force is bigger when lubricating with glass, and the ability of extruder does not satisfy requirement sometimes.If when improving heating-up temperature and making it surpass transformation temperature, it is bad to extrude resistance.If, influence quality of item because of generating brittle substance when heating surpasses 850 ℃ with the method extruding of copper-clad cover.So the present invention adopts double-deck cladding method extruding titanium alloy.
Description
The invention belongs to the technical scheme of titanium or titanium alloy hot extrusion processing.
About the problem of titanium or titanium alloy hot extrusion processing, many research work have been done.The method that solves the lubricated employing in the titanium or titanium alloy hot extrusion processing at present is that lubricating glass or extrusion billet cover one deck plasticity good metal outward, as copper-clad cover or spraying copper or the like.For example Japan Patent JP79006248 is exactly one piece of invention about " lubricating glass that the titanium or titanium alloy hot extrusion is used ", and DRP DE3210304 is one piece of invention about " adopting the lubriation material of spraying copper film as the titanium alloy extruding ".
In fact, it is not no problem adopting existing these lubricating method extruding titanium alloys.The method that adopts copper-clad to overlap is pushed should not be above 850 ℃ under the titanium or titanium alloy heating-up temperature.When surpassing this temperature, on the interface of titanium and copper, then generate a kind of Ti-Cu eutectic structure, this is organized as brittle substance, does not only have lubricated effect, can destroy normal extruding on the contrary.On the other hand, the frictional force that produces when using the lubricating glass extruding is bigger, and needed extruding force is very big when therefore adopting existing lubricating glass to push titanium alloy.Often surpass the ability that equipment allows when adopting large extrusion ratio to push big specification tubing, extruding can not be carried out.If reduce extruding force with the way that improves heating-up temperature, when heating-up temperature was improved the transformation temperature that surpasses titanium alloy, the product that extrude then were rendered as uneven thick tissue, do not satisfy performance demands.
The objective of the invention is to solve that organization of production is tiny evenly, smooth surface, flawless, diameter is bigger, for example the extrusion process problem of the titanium alloy pipe of 161 * 13 millimeters of φ.The extruding heating-up temperature surpasses 850 ℃ but under the transformation temperature of titanium alloy.The tubing extruding can successfully be carried out, and make extrude tubes have good performance.
The titanium alloy extrusion billet that the present invention adopts is to use the ingot casting footpath hammer cogging of secondary vacuum consumable smelting to prepare.Excellent base after the forging cuts off according to dimensional requirement, boring, and it is carried out railway carriage for removing the pollution that causes when forging and the defective of generation.
Fig. 1 is the cutaway view of the titanium alloy extrusion billet of the double-deck jacket of employing.The extrusion billet for preparing is at first wrapped one deck steel capsule, and this is the internal layer jacket of double-deck jacket.Steel capsule is made the A of available 0.5-1.2 millimeters thick by thin soft steel plate
3Steel.As shown in Figure 1, the columnar big cover (2) that is rolled into by sheet metal of the steel capsule of a blank (1) and little cover (3) and two circular ring plates (4) that are processed into sheet metal, (5) constitute.The length of cylindrical sleeve should be longer than blank, for example long 20-30 millimeter.The external diameter of the internal diameter of the big cover of steel and the external diameter of little cover and steel circular ring plate and internal diameter match with the external diameter and the internal diameter of extrusion billet respectively.Blank is enclosed within big steel bushing on the outer surface of blank when jacket, little steel bushing is inserted in the endoporus of blank, makes blank be in the centre of cover, and promptly Tao two ends are than the long 10-15 millimeter in blank two ends.A steel circular ring plate is put at the two ends of blank respectively.Press to the end face of blank at the two ends of cover respectively by the inwardly little cover of big cover direction outwardly, the circular ring plate at two ends is pushed down, till compressing.So far, blank has been wrapped the internal layer steel capsule.
After the intact steel capsule of billet bag, outside steel capsule, also to wrap the layer of copper jacket.The copper-clad cover is to be made by thin soft copper plate, and its thickness can be the 1-2 millimeter.The process of its preparation method and copper-clad cover is similar to steel bushing, but after being rolled into columnar cover with sheet metal, seam is wanted in its slit, with the lubrication in the assurance extrusion process.The diameter of copper-clad cover and the diameter of steel capsule should be complementary.Be the external diameter of the internal diameter of big copper sheathing (6) and little copper sheathing (7) internal diameter with the external diameter of big steel bushing and little steel bushing is corresponding respectively, big copper sheathing can be enclosed within on the outer surface of big steel bushing just, little copper sheathing can insert in the little steel bushing just.The external diameter of copper coin ring plate (8) and (9) and internal diameter are consistent with the internal diameter of the external diameter of big steel bushing and little steel bushing respectively.
Owing to influence of thermal effect, make crowded temperature of articles that raising in various degree be arranged during extruding.When extrusion temperature during near transformation temperature, tend to obtain thick tissue, the too low distortion of materials drag that can make again of temperature increases, and therefore is heated to be suitable in the following 20-50 of transformation temperature ℃ scope.Wrap the bigger titanium alloy extrusion billet of diameter of double-deck jacket, can under the following 20-50 of its transformation temperature ℃ heating-up temperature, push.The technology of pushing double-deck jacket blank is with conventional the same.Adopt the method extruding titanium alloy blank of double-deck jacket, because outer jacket is a copper, the internal layer jacket is a steel, has not only avoided the generation of Ti-Cu eutectic brittle thing but also have good lubricating property in extrusion process in heating more than 850 ℃, and institute is so that push and can carry out smoothly; Extrusion billet with respect to the bigger situation of the ability of extruder under, adopt the method for double-deck jacket under transformation temperature, to heat and push, and tubing tissue, performance and surface quality after the extruding have all obtained very big improvement; In addition, a kind of lubricating glass of the trade mark only is suitable for certain extruding heating-up temperature, and the pressing method of double-deck jacket is adapted to the titanium alloy of the different trades mark.
After titanium alloy blank with double-deck jacket is squeezed into tubing, copper sheet is removed with methods such as pickling, electrolysis.After copper sheet was removed, sheetmetal was easy to remove.
Example 1 is produced the bigger Tc4(Ti-6Al-4V of diameter with pressing method) alloy pipe.Extrusion billet is by making after Tc4 titan alloy casting ingot footpath hammer cogging, railway carriage, boring, the reaming.Blank adopts double-deck jacket.Steel capsule thickness is 0.7 millimeter, and copper-clad cover thickness is 1.5 millimeters.Blank uses the power frequency induction furnace heating.The transformation temperature of the Tc4 alloy that adopts in the experiment is 970 ℃, and heating-up temperature is between 920-950 ℃, and be 30～60 minutes heat time heating time.Extrusion equipment is 3150 tons of hydraulic presses.The relevant squeezing parameter of several samples is listed in table 1 in the experiment of extruding Tc4 alloy.
Table 1 Tc4 titanium alloy pipe extruding related parameter arranged
Example 2 is with double-deck jacket method extruding Tc6(Ti-6Al-1.5cr-2.5Mo-0.5Fe-0.3Si) the alloy production titanium pipe.The transformation temperature of Tc6 alloy is 960 ℃ in this experiment, and the extruding heating-up temperature is 910-940 ℃, and be 30-60 minute heat time heating time.The relevant parameter of three samples is listed in table 2 in the test of extruding Tc6 alloy.
The relevant data of table 2 Tc6 titanium alloy extrude tubes
For characteristics of the present invention are described, the Tc4 titanium alloy has also been adopted the extruding of glass lubricating method, just need surpassing its transformation temperature, heating-up temperature can push.Heating-up temperature is 1050 ℃, is incubated 40 minutes.
Push the bigger titanium alloy pipe of above-mentioned diameter with double-deck cladding method, improved lubricant effect, reduced frictional force, extrusion operation can both very successfully carry out.Extrude tubes surfaces externally and internally quality is all good, flawless.Extrusion temperature must transformation temperature under, organize tiny evenly, function admirable, superplasticforming good processability.The pressing method of double-deck jacket, it is big and cover the shortcoming that generates crisp when copper extruding titanium alloy heating-up temperature surpasses 850 ℃ to have overcome glass lubrication friction power.
The extruding heating-up temperature is the main technological parameter that influence extrudes product tissue and performance.Test shows, when in the above temperature of Tc4 transformation temperature being 1050 ℃ of extruding, the tubing that obtains is organized as thick strip alpha+beta tissue, and adopts double-deck jacket that heating-up temperature is reduced under the transformation temperature, when adding hot extrusion for 950 ℃, organizing of tubing is then tiny even.1050 ℃ of tubing that add hot extrusion are when carrying out superplastic tension for 875-950 ℃, and its percentage elongation only reaches 100-200%, and 950 ℃ of tubing that add hot extrusion are when carrying out superplastic tension in this temperature range, and its percentage elongation can reach 500-800%.
Different extrusion temperatures are listed in table 3 to the influence of Tc4 pipe performance.
The mechanical property of the different extruding of table 3 Tc4 titanium alloy heating-up temperature tubing
Fig. 2 is the horizontal microscopic structure of the Tc4 titanium alloy pipe of extruding under 950 ℃ * 40 minutes heating conditions, * 200, and through 800 ℃ * 60 minutes, air cooling was handled.
Fig. 3 is vertical microscopic structure of the Tc4 titanium alloy pipe of extruding under 950 ℃ * 40 minutes heating conditions, * 500.
Fig. 4 is vertical microscopic structure of the Tc4 titanium alloy pipe of extruding under 1050 ℃ * 40 minutes heating conditions, * 500.
Fig. 5 is the macrostructure of Tc4 titan alloy casting ingot behind hammer cogging.
Claims (3)
1, a kind of being used to solves the technical scheme that the titanium alloy hot extrusion is processed, and it is characterized in that adopting for the titanium alloy blank that pushes usefulness the method for double-deck jacket, is close to titanium alloy extruded stock material package one deck internal layer jacket, wraps the outer jacket of one deck then again in its outside.
2,, it is characterized in that the internal layer sheath material does not at high temperature generate brittle substance with titanium alloy surface, and outer sheath material has good plasticity, can make lubriation material in hot extrusion processing according to the method for the said double-deck jacket of claim 1.
3, according to the method for the said double-deck jacket of claim 1, it is characterized in that the internal layer jacket adopts soft sheet metal to make, outer jacket adopts red copper sheet to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106477 CN1008147B (en) | 1986-09-29 | 1986-09-29 | Titanium alloy calendering by double layer envelopments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106477 CN1008147B (en) | 1986-09-29 | 1986-09-29 | Titanium alloy calendering by double layer envelopments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106477A true CN86106477A (en) | 1988-04-13 |
| CN1008147B CN1008147B (en) | 1990-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86106477 Expired CN1008147B (en) | 1986-09-29 | 1986-09-29 | Titanium alloy calendering by double layer envelopments |
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| Country | Link |
|---|---|
| CN (1) | CN1008147B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934341A (en) * | 2010-09-20 | 2011-01-05 | 宝鸡市利泰有色金属有限公司 | Forging technology of TC4 titanium alloy cylindrical part |
| CN103316941A (en) * | 2013-06-30 | 2013-09-25 | 山西太钢不锈钢股份有限公司 | Method for extruding large-aperture titanium alloy pipe |
| CN103627927A (en) * | 2012-08-24 | 2014-03-12 | 东港市东方高新金属材料有限公司 | Titanium alloy extruded pipe or rolled pipe and preparation method thereof |
| CN103898355A (en) * | 2012-12-24 | 2014-07-02 | 北京有色金属研究总院 | Ti-5Mo-5V-6Cr-3Al titanium alloy extruded tubular product and processing method thereof |
| CN105344731A (en) * | 2015-10-15 | 2016-02-24 | 攀钢集团江油长城特殊钢有限公司 | TC11 titanium alloy seamless pipe and preparation method thereof |
| CN108048678A (en) * | 2017-12-14 | 2018-05-18 | 西北有色金属研究院 | A kind of high-strength high-plastic high-precision beta-titanium alloy tubing preparation method |
| CN113857786A (en) * | 2021-10-21 | 2021-12-31 | 西安赛特思迈钛业有限公司 | TC4 titanium alloy pipe and preparation method thereof |
| CN115386758A (en) * | 2022-08-11 | 2022-11-25 | 西北工业大学 | Preparation method of high-oxygen titanium rolled plate |
-
1986
- 1986-09-29 CN CN 86106477 patent/CN1008147B/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934341A (en) * | 2010-09-20 | 2011-01-05 | 宝鸡市利泰有色金属有限公司 | Forging technology of TC4 titanium alloy cylindrical part |
| CN103627927A (en) * | 2012-08-24 | 2014-03-12 | 东港市东方高新金属材料有限公司 | Titanium alloy extruded pipe or rolled pipe and preparation method thereof |
| CN103898355A (en) * | 2012-12-24 | 2014-07-02 | 北京有色金属研究总院 | Ti-5Mo-5V-6Cr-3Al titanium alloy extruded tubular product and processing method thereof |
| CN103898355B (en) * | 2012-12-24 | 2016-02-24 | 北京有色金属研究总院 | Ti-5Mo-5V-6Cr-3Al titanium alloy extruded tube and working method thereof |
| CN103316941A (en) * | 2013-06-30 | 2013-09-25 | 山西太钢不锈钢股份有限公司 | Method for extruding large-aperture titanium alloy pipe |
| CN103316941B (en) * | 2013-06-30 | 2016-01-27 | 山西太钢不锈钢股份有限公司 | The pressing method of large-bore titanium alloy pipe |
| CN105344731A (en) * | 2015-10-15 | 2016-02-24 | 攀钢集团江油长城特殊钢有限公司 | TC11 titanium alloy seamless pipe and preparation method thereof |
| CN108048678A (en) * | 2017-12-14 | 2018-05-18 | 西北有色金属研究院 | A kind of high-strength high-plastic high-precision beta-titanium alloy tubing preparation method |
| CN113857786A (en) * | 2021-10-21 | 2021-12-31 | 西安赛特思迈钛业有限公司 | TC4 titanium alloy pipe and preparation method thereof |
| CN115386758A (en) * | 2022-08-11 | 2022-11-25 | 西北工业大学 | Preparation method of high-oxygen titanium rolled plate |
| CN115386758B (en) * | 2022-08-11 | 2024-01-23 | 西北工业大学 | Preparation method of high-oxygen titanium rolled plate |
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| Publication number | Publication date |
|---|---|
| CN1008147B (en) | 1990-05-30 |
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