CN105344731A - TC11 titanium alloy seamless pipe and preparation method thereof - Google Patents
TC11 titanium alloy seamless pipe and preparation method thereof Download PDFInfo
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- CN105344731A CN105344731A CN201510666696.6A CN201510666696A CN105344731A CN 105344731 A CN105344731 A CN 105344731A CN 201510666696 A CN201510666696 A CN 201510666696A CN 105344731 A CN105344731 A CN 105344731A
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- titanium alloy
- glass lubricant
- seamless pipe
- alloy bar
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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
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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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
Abstract
The invention discloses a preparation method of a TC11 titanium alloy seamless pipe. The preparation method comprises the steps that (1) a hole is punched in a TC11 titanium alloy rod; (2) the surface of the TC11 titanium alloy rod is coated with an antioxidant, and then the TC11 titanium alloy rod is heated at the temperature of 950-1030 DEG C; and (3) the surface of the heated TC11 titanium alloy rod is coated with a glass lubricant A, the interior of the hole of the TC11 titanium alloy rod is coated with a glass lubricant B, and then the titanium alloy rod is squeezed. After the surface of the TC11 titanium alloy rod is coated with the antioxidant, the TC11 titanium alloy rod is heated at the temperature of 950-1030 DEG C; the tolerable temperature of the glass lubricant A is 900-1000 DEG C, and the tolerable temperature of the glass lubricant B is 900-1050 DEG C. The invention further provides the TC11 titanium alloy seamless pipe prepared through the preparation method. By means of the preparation method, the titanium alloy seamless pipe with large length can be obtained at a low cost, and the microscopic structure, the surface quality and the mechanical properties are excellent.
Description
Technical field
The present invention relates to a kind of TC11 titanium alloy seamless pipe and preparation method thereof.
Background technology
Along with the development of science and technology, the requirement of all trades and professions to titanium alloy seamless pipe is more and more higher, therefore, it is possible to produce high-quality wire product, can improve again lumber recovery simultaneously and have long-range market prospects with the preparation method of the titanium alloy seamless pipe reduced costs.
Titanium alloy seamless pipe, particularly TC11 seamless pipe, is mainly used in aerospace field, and as everyone knows, aerospace field, to the quality requirement of metal product very strict, is also the same to the quality requirement of the product of titanium alloy seamless pipe.Existing titanium alloy seamless pipe is generally carry out machined again and make after adopting titanium alloy bar to hole, and its pipe length affects very greatly by machining tool, and production efficiency and lumber recovery low; And still immature in the extruding production technology development of titanium alloy seamless pipe, particularly adopt the fashion of extrusion of copper-clad cover, be very unfavorable for suitability for industrialized production.
Summary of the invention
The object of the invention is to overcome that the lumber recovery existed in existing TC11 titanium alloy seamless pipe production method is low, high in cost of production problem, there is provided a kind of lumber recovery high and the preparation method of the TC11 titanium alloy seamless pipe that cost is low, and can obtain that length is longer and the TC11 titanium alloy seamless pipe that surface property is excellent, microscopic structure is good by the method.
The present inventor finds through deep research, under being engaged in specific heating-up temperature, TC11 titanium alloy is heated, and the glass lubricant B of the described glass lubricant A of employing tolerance 900-1000 DEG C of temperature and slightly low temperature, can under the fashion of extrusion without the need to adopting copper-clad to overlap, obtain the longer titanium alloy seamless pipe of length at low cost, and the advantage that production efficiency is high, cost is low, operation simplifies, thus complete the present invention.
Also namely, the invention provides a kind of preparation method of TC11 titanium alloy seamless pipe, wherein, the method comprises:
(1) through hole is carried out to TC11 titanium alloy bar;
(2) heat at 950-1030 DEG C after antioxidant is coated on the surface of described TC11 titanium alloy bar;
(3) by upper for the coating of the surface of the TC11 titanium alloy bar after heating glass lubricant A, in its hole, glass lubricant B in coating, then extrudes titanium alloy bar;
Described glass lubricant A is the glass lubricant of tolerance 900-1000 DEG C of temperature; Described glass lubricant B is the glass lubricant of tolerance 900-1050 DEG C of temperature
Present invention also offers a kind of TC11 titanium alloy seamless pipe obtained by said method.
By the preparation method of titanium alloy seamless pipe of the present invention, under the fashion of extrusion without the need to adopting copper-clad to overlap, the longer titanium alloy seamless pipe of length can be obtained at low cost, and microstructure surface quality and good mechanical performance.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the microstructure picture of TC11 seamless pipe prepared by the embodiment of the present invention 1.
Fig. 2 is the microstructure picture of TC11 seamless pipe prepared by the embodiment of the present invention 2.
Fig. 3 is the microstructure picture of TC11 seamless pipe prepared by the embodiment of the present invention 3.
Fig. 4 is the microstructure picture of TC11 seamless pipe prepared by the embodiment of the present invention 4.
Fig. 5 is the microstructure picture of TC11 seamless pipe prepared by the embodiment of the present invention 5.
Fig. 6 is the microstructure picture of the TC4 seamless pipe of comparative example 1 of the present invention preparation.
Fig. 7 is the microstructure picture of the TC11 seamless pipe of comparative example 2 of the present invention preparation.
Fig. 8 is the microstructure picture of the TC11 seamless pipe of comparative example 3 of the present invention preparation.
Fig. 9 is the microstructure picture of the TC11 seamless pipe of comparative example 4 of the present invention preparation.
Detailed description of the invention
Below the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, " tolerable temperature " of glass lubricant refers to that glass lubricant is the ceiling temperature of Applicable temperature.The glass lubricant of the Applicable temperature upper limit lower than glass lubricant A that what " glass lubricant B is the glass lubricant of tolerable temperature than described glass lubricant A low 20-30 DEG C " in the present invention referred to that glass lubricant B adopts is.
The invention provides a kind of preparation method of TC11 titanium alloy seamless pipe, wherein, the method comprises:
(1) through hole is carried out to TC11 titanium alloy bar;
(2) heat at 950-1030 DEG C after antioxidant is coated on the surface of described TC11 titanium alloy bar;
(3) by upper for the coating of the surface of the TC11 titanium alloy bar after heating glass lubricant A, in its hole, glass lubricant B in coating, then extrudes titanium alloy bar;
Described glass lubricant A is the glass lubricant of tolerance 900-1000 DEG C of temperature; Described glass lubricant B is the glass lubricant of tolerance 900-1050 DEG C of temperature
In the present invention, described TC11 titanium alloy bar can be the TC11 titanium alloy bar of this area routine, such as, can be the TC11 titanium alloy bar purchased from derivable number Tai Ye branch company etc.But in order to obtain the more excellent titanium alloy tube of surface quality, under preferable case, surface roughness Ra≤6.3 μm of described TC11 titanium alloy bar, more preferably Ra is 3.2-6.3 μm.
In the present invention, the method for the surface roughness of the reduction titanium alloy bar of this area routine can be adopted to process described titanium alloy bar, to make surface roughness Ra≤6.3 μm of described titanium alloy bar.As the method for the surface roughness of reduction titanium alloy bar, such as, can carry out surperficial finishing tool at described titanium alloy bar.
When particularly in order to obtain surface quality more excellent TC11 titanium alloy seamless pipe, TC11 titanium alloy bar smooth surface will be kept especially, if the through hole step of step (1) causes the slightly coarse undesirable words in TC11 titanium alloy bar surface, also can by conventional surperficial finishing tool technology by smooth for its surface treatment.
According to the preparation method of TC11 titanium alloy seamless pipe of the present invention, the specification of described TC11 titanium alloy bar suitably can be selected according to the size of the specification of extruder and required seamless pipe, diameter such as can be adopted to be 200-350mm titanium alloy bar, conveniently process, such as can before boring or after boring, sawing is the bar of 300-500mm length.
In addition, in the method for the invention, to the through hole of titanium alloy bar also without any restriction, the through-hole approaches of this area routine can be adopted to carry out, and such as can form internal diameter from an end face of described TC11 titanium alloy bar to another end face is the hole of 80-130mm.
In the present invention, carry out through hole with what obtain hollow to described TC11 titanium alloy bar and can be suitable for extruded titanium alloy hollow stick, the degree of depth in such hole is generally the length of adopted bar.
According to the present invention, in order to prevent a large amount of oxidation in described TC11 titanium alloy bar surface in process, thus causing its surface quality to reduce, needing to coat antioxidant on the surface of described TC11 titanium alloy bar.The present invention is not particularly limited described antioxidant, as long as can make the surface of described TC11 titanium alloy bar can not be oxidized in a large number.Particularly in order to coordinate follow-up heat treatment, the present invention preferably selects hot painting type antioxidant, such as, can be to be coated with powder antioxidant etc. purchased from the T-1 model of Beijing Tianlichuang Glass Technology Development Co., Ltd. or the heat of NG-1 model.
In preferred situation, the method also comprises: before coating antioxidant to the surface of described TC11 titanium alloy bar, first described TC11 titanium alloy bar is heated to 50-200 DEG C, is more preferably heated to 100-160 DEG C.When before the surface smear antioxidant to described TC11 titanium alloy bar, first described TC11 titanium alloy bar is heated, antioxidant can be made to be attached on described TC11 titanium alloy bar better, be conducive to forming fine and close antioxidant coating, thus prevent a large amount of oxidations of the surface of described TC11 titanium alloy bar in process better, and improve the surface quality of formed TC11 titanium alloy tube better.
According to the present invention; the consumption of described antioxidant is not particularly limited; as long as the antioxidant coating formed on the surface of described TC11 titanium alloy bar can be made to protect the surface of described TC11 titanium alloy bar not to be oxidized in a large number well; under preferable case, the amount of the antioxidant that the surface of described TC11 titanium alloy bar scribbles is 5-20g/cm
2, be more preferably 5-10g/cm
2.
According to the present invention, after antioxidant is coated on the surface of described TC11 titanium alloy bar, need to heat this TC11 titanium alloy bar at 950-1030 DEG C, more preferably at 970-1020 DEG C, such as under 975 DEG C, 980 DEG C, 1000 DEG C, 1015 DEG C, 1018 DEG C equitemperatures, this TC11 titanium alloy bar is heated.Under preferable case, the time of described heating is 80-1500s, is more preferably 1000-1200s.
One of the present invention preferred embodiment in, the condition of described heating comprises: the temperature of heating is 950-1030 DEG C, and the time of heating is 1000-1200s.
In another preferred embodiment of the present invention, the condition of described heating comprises: the temperature of heating is 970-1020 DEG C, and the time of heating is 1000-1200s.
In the present invention, after described titanium alloy bar carries out this heating, the microscopic structure of titanium alloy bar can be made not change, grain size change is not obvious, thus has easy machining deformation advantage.When described TC11 titanium alloy bar carries out the temperature that heats higher than 1030 DEG C, TC11 titanium alloy bar microscopic structure will be made to change to Widmannstatten structure, grain size increases, cause the surface quality of the TC11 titanium alloy seamless pipe extruding gained and mechanical property poor; When described TC11 titanium alloy bar carries out the temperature that heats lower than 950 DEG C, squeeze pressure may will be greater than extruder load, and extrusion operation is difficult to carry out smoothly.
According to the present invention, by upper for the coating of the surface of the titanium alloy bar after above-mentioned heating glass lubricant A, described glass lubricant A can make the surface of titanium alloy bar form one deck protection film, such as, for 1-3mm softens the strong film of lubrication; Except glass lubricant A in the surface coating of the titanium alloy bar after described heating, also need in hole, be coated with glass lubricant B.Described glass lubricant B also can make to form one deck protection film in the hole of titanium alloy bar, such as, for 1-3mm softens the strong film of lubrication.
When the titanium alloy bar being coated with described glass lubricant A and B is extruded, the film that this glass lubricant A and B is formed respectively in the surface of titanium alloy bar and hole can play the effect of lubrication, more be conducive to the extruding of TC11 titanium alloy bar and form TC11 titanium alloy seamless pipe, this TC11 titanium alloy seamless pipe is due to the problem of no longer oxidation, scuffing etc. faced by meeting, thus longer titanium alloy seamless pipe can be obtained, improve lumber recovery; And, because described glass lubricant A can adopt the mode of automation roller coating to be coated with, the mode that shown glass lubricant B is coated with in can adopting and rotating is coated with, thus obtain glass lubricant B coating in the watch crystal lubricant A coating of the consistent titanium alloy bar of surface thickness and hole, save human cost on the one hand, method of the present invention can be made more to be conducive to suitability for industrialized production on the one hand, and reduce the impact of human factor on product quality, the stability of the product quality of raising.Can select in addition chemical composition be environmental friendliness, to human non-toxic evil such glass lubricant as described glass lubricant A and B, in this case, relative to existing production method, particularly copper-clad cover fashion of extrusion, preparation method's environmental protection more of TC11 titanium alloy seamless pipe of the present invention.
According to the present invention, described glass lubricant A and B can be identical or different, preferably adopts different glass lubricants as described glass lubricant A and B.Wherein, described glass lubricant A is the glass lubricant of tolerance 900-1000 DEG C of temperature, and its main component is such as borosilicate and aluminosilicate, can also containing micro-Na
2o, K
2o, B
2o
3.Glass lubricant A is purchased from the glass lubricant of the 360W-10 model (Applicable temperature is 900-1000 DEG C) of Beijing Tianlichuang Glass Technology Development Co., Ltd., M-1 model (Applicable temperature is 800-950 DEG C), TB-4 model (Applicable temperature is 800-950 DEG C) and Ti-5 model (Applicable temperature is 850-1000 DEG C).
Wherein, described glass lubricant B is the glass lubricant of tolerance 900-1050 DEG C of temperature, and its main component is such as borosilicate and aluminosilicate, can also containing micro-MgO and Al
2o
3.Glass lubricant B is purchased from the glass lubricant of the 844-7 model (Applicable temperature is 900-970 DEG C) of Beijing Tianlichuang Glass Technology Development Co., Ltd., Ti-6 model (Applicable temperature is 850-1000 DEG C), Ti-29 model (Applicable temperature is 950-1050 DEG C) and Ti-19 model (Applicable temperature is 900-970 DEG C).
One of the present invention preferred embodiment in, the glass lubricant as glass lubricant B adopted has lower tolerable temperature than the glass lubricant as described glass lubricant A, the tolerable temperature of described glass lubricant B than the temperature of low more than 20 DEG C of glass lubricant A, more preferably low 20-30 DEG C.
According to the present invention, the consumption of described glass lubricant A is not particularly limited, generally, as long as good lubrication effect can be reached, but for obtain higher surface quality, more excellent microscopic structure and Geng Gao mechanical property and cost-saving object, under preferable case, the amount of the glass lubricant A that the surface of described TC11 titanium alloy bar scribbles is 10-50g/cm
2, be more preferably 20-30g/cm
2.
According to the present invention, the consumption of described glass lubricant B is not particularly limited, generally, as long as can lubricant effect be reached, but for obtain higher surface quality, more excellent microscopic structure and Geng Gao mechanical property and cost-saving object, under preferable case, the amount of the glass lubricant B scribbled in the hole of described TC11 titanium alloy bar is 10-50g/cm
2, be more preferably 20-30g/cm
2.
According to the present invention, the TC11 titanium alloy bar being coated with described glass lubricant A and B is extruded, the temperature of extruding is mainly determined by the temperature adopted when heating, usually because other operations between heating with extruding can take away some heats, make the temperature outline of described extruding lower than the temperature heated, preferably, the temperature of described extruding is 940-1020 DEG C, extrusion ratio is 5-15, and extrusion speed is 100-200mm/s.More preferably, the temperature of described extruding is 970-1018 DEG C.More preferably, described extrusion ratio is 7-10.More preferably, described extrusion speed is 100-150mm/s, is more preferably 100-120mm/s.
According to the present invention, described extruding can this area routine for the production of the extruder of titanium alloy seamless pipe in carry out, the extruder of the types such as such as horizontal, vertical, sleeping four-column type.
Present invention also offers a kind of TC11 titanium alloy seamless pipe obtained by said method.
Adopt method of the present invention, good squeezing effect can be obtained, under the prerequisite compared with high yield and lower cost, obtain longer, excellent surface quality and good mechanical performance, the surperficial free from flaw crackle of microscopic structure without complete original β crystal boundary, the smooth titanium alloy seamless pipe of corrugationless, preferably, the length of described titanium alloy seamless pipe is 3-10m, tensile strength Rm is 950-1100MPa (being preferably 1000-1100MPa), yield strength Rp
0.2for 900-1000MPa (being preferably 960-1000MPa), percentage elongation A is more than 9% (being preferably 12-20%), and reduction of area Z is more than 18% (being preferably 28-45%).In the preferred embodiment of one of the present invention, the microscopic structure of the titanium pipe of gained is two-phase section worked structure, without complete original β crystal boundary.
Below will be described the present invention by embodiment.
In following examples and in comparative example:
TC11 bar is purchased from derivable number Tai Ye branch company, and described extruder is 3150t type horizontal extruder.
Embodiment 1
The present embodiment is for illustration of titanium alloy seamless pipe of the present invention and preparation method thereof.
Being cut to by TC11 rod saw (surface roughness Ra is 5.5 μm) long is 450mm, diameter is the bar of 215mm, and through hole obtains, and internal diameter is 85mm, the degree of depth is the hole of 450mm, (heat purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. T-7 is coated with powder antioxidant, and coating weight is 5g/cm this TC11 rod to be heated to be coated with antioxidant on its surface after 150 DEG C
2), then send in heating furnace heat 1200s at 980 DEG C.Then, take out heat after TC11 rod, and in its surperficial roller coating glass lubricant A (coating weight is 20g/cm
2, purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. 360W-10 model, Applicable temperature is 900-1000 DEG C, as follows), and in the hole of its end face, coating glass lubricant B, (coating weight is 20g/cm
2, purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. 844-7 model, Applicable temperature is 900-970 DEG C, as follows).TC11 rod after coating is sent in recipient, at extrusion temperature is 975 DEG C, with the extrusion speed of 100mm/s, 8 extrusion ratio under extrude, obtain and long be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, the smooth surface of this pipe, its microscopic structure is shown in Fig. 1, and as shown in Figure 1, the microscopic structure of this pipe is two-phase section worked structure, without complete original β crystal boundary; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Embodiment 2
The present embodiment is for illustration of titanium alloy seamless pipe of the present invention and preparation method thereof.
Being cut to by TC11 rod saw (surface roughness Ra is 5.3 μm) long is 470mm, diameter is the bar of 215mm, and boring obtains that internal diameter is 85mm, the degree of depth is the hole of 470mm on an one end face, (heat purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. NG-1 is coated with powder antioxidant, and coating weight is 0.2g/cm this TC11 rod to be heated to be coated with antioxidant on its surface after 150 DEG C
2), then send in heating furnace heat 1100s at 1020 DEG C.Then, take out heat after TC11 rod, and in its surperficial roller coating glass lubricant A (coating weight is 22g/cm
2, purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. 360W-10 model), and in the hole of its end face, coating glass lubricant B, (coating weight is 23g/cm
2, purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. 844-7 model).TC11 rod after coating is sent in recipient, at extrusion temperature is 1018 DEG C, with the extrusion speed of 120mm/s, 8 extrusion ratio extrude from the hole of end face, obtain and long be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, the smooth surface of this pipe, its microscopic structure is shown in Fig. 2, and as shown in Figure 2, the microscopic structure of this pipe is two-phase section worked structure, without complete original β crystal boundary; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Embodiment 3
The present embodiment is for illustration of titanium alloy seamless pipe of the present invention and preparation method thereof.
By TC11 rod (surface roughness Ra is 5.2 μm) sawing for length is 470mm, diameter is the bar of 215mm, and boring obtains that internal diameter is 85mm, the degree of depth is the hole of 470mm on an one end face, (heat purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. T-7 is coated with powder antioxidant, and coating weight is 0.2g/cm this TC11 rod to be heated to be coated with antioxidant on its surface after 150 DEG C
2), then send in heating furnace heat 1100s at 1020 DEG C.Then, take out heat after TC11 rod, and in its surperficial roller coating glass lubricant A (coating weight is 21g/cm
2, purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. 360W-10 model), and in the hole of its end face, coating glass lubricant B, (coating weight is 22g/cm
2, purchased from Beijing Tianlichuang Glass Technology Development Co., Ltd. 844-7 model).TC11 rod after coating is sent in recipient, at extrusion temperature is 1018 DEG C, with the extrusion speed of 120mm/s, 8 extrusion ratio extrude from the hole of end face, obtain and long be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, the smooth surface of this pipe, its microscopic structure is shown in Fig. 3, and as shown in Figure 3, the microscopic structure of this pipe is two-phase section worked structure, without complete original β crystal boundary; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Embodiment 4
The present embodiment is for illustration of titanium alloy seamless pipe of the present invention and preparation method thereof.
Method according to embodiment 1, difference is, the coating weight of the glass lubricant A1 adopted is 10g/cm
2, thus obtain and long be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, the surperficial outer surface quality of this pipe is poor, and have scuffing (scratching interrupted total length degree 2.9m), its microscopic structure is shown in Fig. 4, and as shown in Figure 4, the microscopic structure of this pipe is two-phase section worked structure, without complete original β crystal boundary; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Embodiment 5
Method according to embodiment 1, wherein, the speed of extruding is 200mm/s, obtains long to be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, the smooth surface of this pipe, its microscopic structure is shown in Fig. 5, and as shown in Figure 5, the microscopic structure of this pipe is Widmannstatten structure; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Comparative example 1
The present embodiment is for illustration of titanium alloy seamless pipe of the present invention and preparation method thereof.
Method according to embodiment 1, difference is, adopts TC4 rod (surface roughness Ra is 6 μm) to replace TC11 rod to process, and obtains longly to be 88mm and internal diameter is the TC4 seamless pipe of 72mm for 5.2m, external diameter.Wherein, the surperficial surfaces externally and internally of this pipe has scuffing, and its microscopic structure is shown in Fig. 6, and as shown in Figure 6, the microscopic structure of this pipe is Widmannstatten structure; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Comparative example 2
Method according to embodiment 1, wherein, does not adopt glass lubricant B1, obtains long to be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, there is crackle and surface scratch (the interrupted crackle having 3.8m long and cut) in the inner surface of this pipe, its microscopic structure is shown in Fig. 7, and as shown in Figure 7, the microscopic structure of this pipe is two-phase section worked structure, without complete original β crystal boundary; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Comparative example 3
Method according to embodiment 1, wherein, does not adopt glass lubricant A1, obtains long to be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, there is crackle and surface scratch (the interrupted crackle having 4m long and cut) in the outer surface of this pipe, its microscopic structure is shown in Fig. 8, and as shown in Figure 8, the microscopic structure of this pipe is two-phase section worked structure, without complete original β crystal boundary; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Comparative example 4
Method according to embodiment 1, wherein, the heating-up temperature of carrying out heating after coating antioxidant is 1050 DEG C, and correspondingly extrusion temperature is 1045 DEG C, obtains long to be 76mm and internal diameter is the TC11 seamless pipe of 42mm for 6m, external diameter.Wherein, the smooth surface of this pipe, its microscopic structure is shown in Fig. 9, and as shown in Figure 9, the microscopic structure of this pipe is Widmannstatten structure; Tensile strength Rm under its room temperature, yield strength Rp
0.2, percentage elongation A and reduction of area Z is in table 1.
Comparative example 5
Method according to embodiment 1, wherein, the heating-up temperature of carrying out heating after coating antioxidant is 880 DEG C, and correspondingly extrusion temperature is 860 DEG C, and extruding force exceedes equipment maximum load, and vexed car, extrudes unsuccessfully.
Table 1
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a preparation method for TC11 titanium alloy seamless pipe, is characterized in that, the method comprises:
(1) through hole is carried out to TC11 titanium alloy bar;
(2) heat at 950-1030 DEG C after antioxidant is coated on the surface of described TC11 titanium alloy bar;
(3) by upper for the coating of the surface of the TC11 titanium alloy bar after heating glass lubricant A, in its hole, glass lubricant B in coating, then extrudes titanium alloy bar;
Described glass lubricant A is the glass lubricant of tolerance 900-1000 DEG C of temperature; Described glass lubricant B is the glass lubricant of tolerance 900-1050 DEG C of temperature.
2. method according to claim 1, wherein, in step (3), the amount of the glass lubricant A that the surface of described TC11 titanium alloy bar scribbles is 10-50g/cm
2, be preferably 20-30g/cm
2.
3. method according to claim 1 and 2, wherein, in step (3), the amount of the glass lubricant B scribbled in the hole of described TC11 titanium alloy bar is 10-50g/cm
2, be preferably 20-30g/cm
2.
4. according to the method in claim 1-3 described in any one, wherein, the temperature of described extruding is 940-1020 DEG C, and extrusion ratio is 5-15, and extrusion speed is 100-200mm/s.
5. according to the method in claim 1-4 described in any one, wherein, in step (2), the time of described heating is 80-1500s, is preferably 1000-1200s.
6. the amount of the antioxidant that the surface of according to the method in claim 1-5 described in any one, wherein, described TC11 titanium alloy bar scribbles is 5-20g/cm
2.
7. according to the method in claim 1-6 described in any one, wherein, the method also comprises: in step (2), before coating antioxidant to the surface of described titanium alloy bar, first described TC11 titanium alloy bar is heated to 50-200 DEG C, is preferably 100-160 DEG C.
8. according to the method in claim 1-7 described in any one, wherein, surface roughness Ra≤6.3 μm of described TC11 titanium alloy bar.
9. a TC11 titanium alloy seamless pipe, is characterized in that, this TC11 titanium alloy seamless pipe is by prepared by the method in claim 1-8 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510666696.6A CN105344731B (en) | 2015-10-15 | 2015-10-15 | A kind of TC11 titanium alloys seamless pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510666696.6A CN105344731B (en) | 2015-10-15 | 2015-10-15 | A kind of TC11 titanium alloys seamless pipe and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN105344731A true CN105344731A (en) | 2016-02-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106825105A (en) * | 2017-01-23 | 2017-06-13 | 江苏顺通管业有限公司 | A kind of seamed pipe manufacturing method of titanium alloy |
| CN111496008A (en) * | 2020-05-08 | 2020-08-07 | 西安诺博尔稀贵金属材料股份有限公司 | Method for preparing high-precision small-caliber TA2 pipe for spaceflight |
| CN112474851A (en) * | 2020-11-04 | 2021-03-12 | 攀钢集团攀枝花钛材有限公司江油分公司 | Preparation method of titanium alloy TC4 profiled bar with asymmetric cross section |
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| CN106825105A (en) * | 2017-01-23 | 2017-06-13 | 江苏顺通管业有限公司 | A kind of seamed pipe manufacturing method of titanium alloy |
| CN111496008A (en) * | 2020-05-08 | 2020-08-07 | 西安诺博尔稀贵金属材料股份有限公司 | Method for preparing high-precision small-caliber TA2 pipe for spaceflight |
| CN112474851A (en) * | 2020-11-04 | 2021-03-12 | 攀钢集团攀枝花钛材有限公司江油分公司 | Preparation method of titanium alloy TC4 profiled bar with asymmetric cross section |
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| CN105344731B (en) | 2018-03-16 |
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