CN113996669A - Preparation method of smooth-surface titanium alloy straight wire for welding filling - Google Patents
Preparation method of smooth-surface titanium alloy straight wire for welding filling Download PDFInfo
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- CN113996669A CN113996669A CN202111227378.1A CN202111227378A CN113996669A CN 113996669 A CN113996669 A CN 113996669A CN 202111227378 A CN202111227378 A CN 202111227378A CN 113996669 A CN113996669 A CN 113996669A
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
The invention discloses a preparation method of a smooth-surface titanium alloy straight wire for welding filling, which comprises the steps of carrying out heat preservation on a selected titanium alloy rolled strip at 500-750 ℃ for 30-120 min, and rounding the titanium alloy rolled strip subjected to thermal stress relief to obtain the titanium alloy rolled strip with the diameter phi of 8.5-8.0 mm; peeling a titanium alloy rolled strip with the diameter of phi 8.5-8.0 mm to obtain a titanium alloy wire blank with the diameter of phi 8.1-7.2 mm; carrying out roller die drawing on the titanium alloy wire blank to obtain the titanium alloy wire blank with the diameter of phi 3.0-1.5 mm; straightening and cutting a titanium alloy wire blank with the diameter of phi 3.0-1.5 mm to obtain a straight wire blank; carrying out vacuum annealing treatment on the straight wire blank to reduce the hydrogen content in the straight wire blank; polishing the straight wire blank with the reduced hydrogen content to obtain a titanium alloy straight wire with the diameter of phi 3.0-1.5 mm; the invention can simultaneously improve the surface quality and the dimensional accuracy of the titanium alloy straight wire.
Description
Technical Field
The invention belongs to the technical field of preparation of titanium alloy straight wires, and particularly relates to a preparation method of a smooth-surface titanium alloy straight wire for welding filling.
Background
In order to ensure the quality of welding seams, the requirements of high quality, high smoothness and high safety are put forward for the welding filling wire. The surface finish degree, diameter tolerance, straightness and tensile strength of the welding wire are important indexes influencing the wire feeding performance of the welding wire in the using process. The wire is required to have a smooth surface without impurities that adversely affect the welding characteristics, the operation of the welder, or the metal properties of the weld. The diameter deviation is too large, the wire feeding resistance is large due to the linearity difference, the wire feeding speed is unstable, the contact tip is easily abraded, and the welding quality and the welding efficiency are seriously influenced. The tensile strength of the welding wire determines the stiffness of the welding wire, the strength is too low, the welding wire is too soft, the welding wire cannot be uniformly and continuously fed at a constant speed in the welding process, the welding wire is bent, and arc striking is unstable. Therefore, the welding wire for welding filler is strictly controlled to ensure the use requirement.
Generally, the processing of titanium alloy welding wires adopts a die-fixing drawing process. The drawing of the fixed die has the characteristic of high dimensional precision, but in the cold drawing processing process of the fixed die, an oxide layer with the thickness of 0.02mm exists on the surface of the wire material, the acid washing degree is difficult to control in the subsequent acid-base washing procedure, the acid washing degree cannot be completely eliminated, the surface quality is difficult to ensure, and the environment is polluted. In addition, in the conventional production, a grinding method is mainly adopted for the titanium alloy straight wire, grinding process may cause grinding wheel particles to fall and be embedded into the welding wire, the quality of the welding wire is affected, and the problem of uneven roundness of the thin wire is easily caused in the grinding process, so that the wire is out of tolerance or uneven in size, and is not suitable for the wire with the diameter less than or equal to phi 3.0.
Disclosure of Invention
The invention aims to provide a preparation method of a smooth-surface titanium alloy straight wire for welding filling, and meanwhile, the surface quality and the dimensional accuracy of the titanium alloy straight wire are improved.
The invention adopts the following technical scheme: a preparation method of a smooth-surface titanium alloy straight wire for welding filling comprises the following steps:
keeping the selected titanium alloy rolled strips at 500-750 ℃ for 30-120 min to eliminate the thermal stress of the titanium alloy rolled strips, wherein the diameter of the rolled strips is phi 11-9.5 mm;
rounding the titanium alloy rolled strip after the thermal stress is eliminated to obtain the titanium alloy rolled strip with the diameter phi of 8.5-8.0 mm;
peeling a titanium alloy rolled strip with the diameter of phi 8.5-8.0 mm to obtain a titanium alloy wire blank with the diameter of phi 8.1-7.2 mm;
carrying out roller die drawing on the titanium alloy wire blank to obtain the titanium alloy wire blank with the diameter of phi 3.0-1.5 mm;
straightening and cutting a titanium alloy wire blank with the diameter of phi 3.0-1.5 mm to obtain a straight wire blank;
carrying out vacuum annealing treatment on the straight wire blank to reduce the hydrogen content in the straight wire blank;
and polishing the straight wire blank with the reduced hydrogen content to obtain the titanium alloy straight wire with the diameter of phi 3.0-1.5 mm.
Preferably, rounding the titanium alloy rolled strip after the thermal stress is removed comprises:
and (4) performing multi-pass rounding on the titanium alloy rolled strip after eliminating the thermal stress by adopting the fixed die.
Preferably, the straightening and breaking of the titanium alloy wire blank with the diameter of phi 3.0-1.5 mm comprises the following steps:
and straightening the titanium alloy wire blank by adopting a sine straightening mode.
Preferably, the heating temperature is 600-800 ℃ during vacuum annealing treatment, the heat is preserved for 0.5-3 h, and the vacuum degree is not lower than 1.33 multiplied by 10-2Pa。
Preferably, the straight wire blank is fixed by a fixing tool during the vacuum annealing treatment.
Preferably, the polishing wheel in the polishing treatment is made of nylon and has the granularity of 300-.
Preferably, the length of the straight wire blank is 1000-1500 mm.
The invention has the beneficial effects that: the invention can avoid the phenomenon of die sticking and accumulation by adopting a roller die drawing mode, has no possibility of damaging the surface of the wire rod by drawing, can realize continuous production and improve the production efficiency, and in addition, by adopting polishing treatment to replace a conventional grinding method, the problem of uneven roundness of the straight wire is solved while the surface smoothness of the straight wire is improved, and the dimensional precision is improved.
Drawings
FIG. 1 is a flow chart of a method for preparing a smooth and clean titanium alloy straight wire for welding filling according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a preparation method of a smooth-surface titanium alloy straight wire for welding filling, which comprises the following steps as shown in figure 1: keeping the selected titanium alloy rolled strips at 500-750 ℃ for 30-120 min to eliminate the thermal stress of the titanium alloy rolled strips, wherein the diameter of the rolled strips is phi 11-9.5 mm; rounding the titanium alloy rolled strip after the thermal stress is eliminated to obtain the titanium alloy rolled strip with the diameter phi of 8.5-8.0 mm; peeling a titanium alloy rolled strip with the diameter of phi 8.5-8.0 mm to obtain a titanium alloy wire blank with the diameter of phi 8.1-7.2 mm; carrying out roller die drawing on the titanium alloy wire blank to obtain the titanium alloy wire blank with the diameter of phi 3.0-1.5 mm; straightening and cutting a titanium alloy wire blank with the diameter of phi 3.0-1.5 mm to obtain a straight wire blank; carrying out vacuum annealing treatment on the straight wire blank to reduce the hydrogen content in the straight wire blank; and polishing the straight wire blank with the reduced hydrogen content to obtain the titanium alloy straight wire with the diameter of phi 3.0-1.5 mm.
The invention can avoid the phenomenon of die sticking and accumulation by adopting a roller die drawing mode, has no possibility of damaging the surface of the wire rod by drawing, can realize continuous production and improve the production efficiency, and in addition, by adopting polishing treatment to replace a conventional grinding method, the problem of uneven roundness of the straight wire is solved while the surface smoothness of the straight wire is improved, and the dimensional precision is improved.
In the invention, the fixed die is adopted to perform multi-pass rounding on the titanium alloy rolled strip after eliminating the heat stress. The method is characterized in that a sine straightening mode is adopted to straighten the titanium alloy wire blank, the length of the straight wire blank after the straight wire blank is cut off is 1000-1500 mm, and the length can be suitable for a polishing machine to polish the straight wire blank, so that the straight wire is prevented from being coiled in the polishing process.
In the invention, the heating temperature is 600-800 ℃ during vacuum annealing treatment, and the heat preservation is 05 to 3 hours, and the vacuum degree is not less than 1.33 multiplied by 10-2Pa, the hydrogen content in the titanium alloy straight wire can be removed through vacuum annealing treatment, so that the performance requirements can be met.
In addition, a fixing tool is adopted to fix the straight wire blank during the vacuum annealing treatment so as to avoid the deformation of the wire. In order to avoid that grinding process may cause grinding wheel particles to fall and be embedded into the welding wire to influence the quality of the welding wire, the polishing wheel is made of nylon material in the polishing treatment of the invention, and the granularity is 300-.
The roller die technology combines the characteristics of traditional rolling and drawing, reduces drawing force, increases pass processing rate and reduces the processing hardening degree. The roller die adopts a rolling friction mode, so that no relative friction exists in the extending direction at the contact point of the wire and the roller wheel, the phenomenon of die sticking and accumulation is avoided, the possibility of pulling the surface of the wire is avoided, the continuous production can be realized, and the production efficiency is high.
Meanwhile, the vacuum stress relief annealing technical process does not influence the processing deformation and the plastic deformation degree accumulated in the wire. The surface of the wire blank does not generate an oxide layer in the drawing process, and the process can achieve the purpose of optimizing the surface quality on the premise of not reducing the strength of the material.
Example 1
Φ2.4±0.05×1000±6The production method of the mm-sized Ti35HS alloy wire comprises the following specific operation steps:
step 1: will phi 10±0.5And (4) annealing the rolled strip in atmosphere at 680 ℃, keeping the temperature for 60min, and cooling in air.
Step 2: performing four-pass rounding on the rolled strip obtained in the step 1 on a wire rod drawing machine, wherein the deformation is 31.1 percent, and the diameter phi of the rolled strip is 8.3 percent±0.05mm × L (length of L) titanium alloy rolled bars;
and step 3: removing oxide skin of the rolled strip obtained in the step 2 by adopting a centerless lathe, wherein the scale removing amount is 0.8mm, and the diameter phi 7.5 is obtained±0.05mm × L titanium alloy wire blank;
and 4, step 4: performing roll die reducing drawing and vacuum stress relief annealing on the titanium alloy wire blank obtained in the step 3, wherein the heat deformation is 67 percent, and the diameter phi of the titanium alloy wire blank is 2.4 percent±0.05mm × L titanium alloy wire blank;
and 5: the titanium alloy wire blank obtained in the step 4 is straightened and cut off by adopting a sine straightener to obtain phi 2.4± 0.05mm×1000±6A mm straight wire blank;
step 6: keeping the straight filament blank obtained in the step 5 at 700 ℃ for 1h, wherein the vacuum degree is not lower than 1.33 multiplied by 10-2And (4) carrying out vacuum annealing treatment in a Pa environment to remove hydrogen in the titanium alloy wire blank. The heating process adopts fixed frock, prevents that the silk material from warping.
And 7: and (4) polishing the surface of the straight wire blank obtained in the step (6) by using polishing equipment, wherein a polishing wheel is made of nylon and has the granularity of 600 #. Obtaining a smooth surface phi 2.4±0.05mm×1000±6And (5) mm finished straight yarn.
Tested, phi 2.4 produced by the above method±0.05×1000±6The mm-specification Ti35HS alloy wire has the dimensional tolerance of +/-0.02 mm, the straightness of less than or equal to 0.5mm/m, the H% of 0.0011%, the O% of 0.089%, the roughness average value of 0.426 mu m and the tensile strength of 443MPa, and meets the technical requirements.
Example 2
Φ2.0±0.05×1000±6The production method of the mm specification TA2 titanium wire comprises the following specific operation steps:
step 1: phi 9.5±0.5And (4) carrying out atmospheric annealing treatment and annealing on the mm rolled strip, wherein the annealing temperature is 650 ℃, the heat preservation time is 60min, and the air cooling is carried out.
Step 2: performing two-pass rounding on the rolled strip obtained in the step 1 on a wire rod drawing machine, wherein the deformation is 29 percent, and the diameter phi of the rolled strip is 8.0±0.05mm × L titanium alloy rolled strips;
and step 3: removing oxide skin of the rolled strip obtained in the step 2 by adopting a centerless lathe, wherein the scale removing amount is 0.6mm, and the diameter phi 7.4 is obtained±0.05mm × L titanium alloy wire blank;
and 4, step 4: performing roll die reducing drawing and vacuum stress relief annealing on the titanium alloy wire blank obtained in the step 3, wherein the heat deformation is 72 percent, and obtaining the diameter phi of 2.0±0.05mm × L titanium alloy wire blank;
and 5: straightening the wire blank obtained in the step 4 by sineStraightening and cutting to obtain phi 2.0±0.05mm×1000±6A mm titanium alloy straight wire blank;
step 6: keeping the straight filament blank obtained in the step 5 at 650 ℃ for 1h, wherein the vacuum degree is not lower than 1.33 multiplied by 10-2And (4) carrying out vacuum annealing treatment in a Pa environment to remove hydrogen in the titanium alloy wire blank. The heating process adopts fixed frock, prevents that the silk material from warping.
And 7: and (4) polishing the surface of the straight wire blank obtained in the step (6) by using polishing equipment, wherein a polishing wheel is made of nylon and has the granularity of 400 #. Obtaining a smooth surface phi 2.0±0.05mm×1000±6And (5) mm finished straight yarn.
Tested, phi 2.4 produced by the above method±0.05×1000±6The mm specification TA2 alloy wire has dimensional tolerance of +/-0.02 mm, straightness of less than or equal to 0.5mm/m, H% of 0.0017%, O% of 0.087%, roughness average value of 0.527 mu m and tensile strength of 424MPa, and meets the technical requirements.
The method comprises the steps of peeling after multi-pass rounding of rolled strips, and preparing the titanium alloy straight wire after multi-pass drawing, straightening and breaking by adopting a drawing mode of a roller die. After the wire blank is subjected to vacuum annealing, the smooth-surface titanium alloy straight wire is formed through surface polishing treatment, so that the component requirements, the dimensional accuracy and the surface quality of the finished titanium alloy wire are ensured, and the production efficiency is improved.
Compared with the existing preparation method of the titanium alloy wire, the invention can improve the processing efficiency, save the production resources and reduce the production cost. And the roller die drawing and the vacuum stress relief annealing are adopted, so that the pollution of an oxide layer on the surface of the wire material is avoided, and the production efficiency is improved. And the hydrogen absorption phenomenon in the titanium alloy processing process is eliminated by adopting vacuum dehydrogenation treatment. The processing method of rolling strip annealing, rounding, oxide skin stripping, roller die drawing, vacuum annealing, straightening and cutting down and surface treatment is adopted, wire pollution is avoided, the straight wire with a smooth surface is obtained, and indexes such as components, performance and the like meet the technical standard requirements.
Claims (7)
1. A preparation method of a smooth-surface titanium alloy straight wire for welding filling is characterized by comprising the following steps:
keeping the selected titanium alloy rolled strips at 500-750 ℃ for 30-120 min to eliminate the thermal stress of the titanium alloy rolled strips, wherein the diameter of the rolled strips is phi 11-9.5 mm;
rounding the titanium alloy rolled strip after the thermal stress is eliminated to obtain the titanium alloy rolled strip with the diameter phi of 8.5-8.0 mm;
peeling a titanium alloy rolled strip with the diameter of phi 8.5-8.0 mm to obtain a titanium alloy wire blank with the diameter of phi 8.1-7.2 mm;
carrying out roller die drawing on the titanium alloy wire blank to obtain a titanium alloy wire blank with the diameter of phi 3.0-1.5 mm;
straightening and cutting a titanium alloy wire blank with the diameter of phi 3.0-1.5 mm to obtain a straight wire blank;
carrying out vacuum annealing treatment on the straight wire blank to reduce the hydrogen content in the straight wire blank;
and polishing the straight wire blank with the reduced hydrogen content to obtain the titanium alloy straight wire with the diameter of phi 3.0-1.5 mm.
2. The method for preparing the smooth-faced titanium alloy straight wire for welding filling as claimed in claim 1, wherein the rounding of the titanium alloy rolled strip after the thermal stress is removed comprises:
and (4) performing multi-pass rounding on the titanium alloy rolled strip after eliminating the thermal stress by adopting the fixed die.
3. The method for preparing the polished-surface titanium alloy straight wire for welding and filling as claimed in claim 2, wherein the step of straightening and breaking the titanium alloy wire blank with the diameter of phi 3.0-1.5 mm comprises the following steps:
and straightening the titanium alloy wire blank by adopting a sine straightening mode.
4. The method for preparing the smooth-surface titanium alloy straight wire for welding filling as claimed in claim 1, 2 or 3, wherein the heating temperature in the vacuum annealing treatment is 600-800 ℃, the heat preservation time is 0.5-3 h, and the vacuum degree is not less than 1.33 x 10-2Pa。
5. The method for preparing the smooth-faced titanium alloy straight wire for welding and filling as claimed in claim 4, wherein a fixing tool is adopted to fix the straight wire blank during the vacuum annealing treatment.
6. The method for preparing the smooth-faced titanium alloy straight wire for welding filling as claimed in claim 1 or 5, wherein the polishing wheel in the polishing treatment is made of nylon with a particle size of 300-.
7. The method for preparing the smooth-faced titanium alloy straight wire for welding filling as claimed in claim 6, wherein the length of the straight wire blank is 1000 to 1500 mm.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716715A (en) * | 2009-11-20 | 2010-06-02 | 宝鸡市三鑫金属有限责任公司 | Processing method of titanium and titanium alloy wires |
| CN103203390A (en) * | 2013-03-22 | 2013-07-17 | 西安思维金属材料有限公司 | Processing method for beta titanium alloy wires used for glass frames |
| CN112296120A (en) * | 2020-10-30 | 2021-02-02 | 西安圣泰金属材料有限公司 | Method for processing high-strength TC4 titanium alloy ultrafine grain wire for medical treatment |
| CN112317993A (en) * | 2021-01-04 | 2021-02-05 | 西安稀有金属材料研究院有限公司 | Preparation method of Ti35HS titanium alloy welding wire material |
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- 2021-10-21 CN CN202111227378.1A patent/CN113996669A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716715A (en) * | 2009-11-20 | 2010-06-02 | 宝鸡市三鑫金属有限责任公司 | Processing method of titanium and titanium alloy wires |
| CN103203390A (en) * | 2013-03-22 | 2013-07-17 | 西安思维金属材料有限公司 | Processing method for beta titanium alloy wires used for glass frames |
| CN112296120A (en) * | 2020-10-30 | 2021-02-02 | 西安圣泰金属材料有限公司 | Method for processing high-strength TC4 titanium alloy ultrafine grain wire for medical treatment |
| CN112317993A (en) * | 2021-01-04 | 2021-02-05 | 西安稀有金属材料研究院有限公司 | Preparation method of Ti35HS titanium alloy welding wire material |
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