CN1814395A - High-strength dual-phase titanium alloy welding wire - Google Patents
High-strength dual-phase titanium alloy welding wire Download PDFInfo
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- CN1814395A CN1814395A CN 200610057574 CN200610057574A CN1814395A CN 1814395 A CN1814395 A CN 1814395A CN 200610057574 CN200610057574 CN 200610057574 CN 200610057574 A CN200610057574 A CN 200610057574A CN 1814395 A CN1814395 A CN 1814395A
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Abstract
The invention involves a welding wire for use in a variety of high-strength and two-phase titanium, the alloy composition of the wire(wt%): Al:3.0-5.0, Mo:1.5-3.0, V:1.5-3.0, Zr : 2.0, Nb:3.0-5.0, Hf:0.1-0.3, Ti : cushion. Preparation fillings or wire (wire): (Al alloy) Ti, Zr, Hf addition to zero - sponge state, Al, Mo, V, Nb alloy in the form of Al added. In a vacuum consumable arc melting ingot = 3; Forging, annealing, and pulls.
Description
Technical field
The present invention relates to a kind of welding wire of using when being suitable for the welding of multiple high-strength dual-phase titanium alloy.
Background technology
When China reaches high-strength titanium alloy by force at present in welding, generally select C ∏ 2 welding wires (the production domesticization rear license plate is the TA20 welding wire) of molybdenum equivalent nearly 2.2 for use, its chemical composition is (wt%): Al 3.5～4.5, V 2.5～3.5, Zr1.0～2.0, Ti surplus.With in its welding during strength titanium alloy, can obtain the welding point of good mechanical performance; But during with its welding high-strength titanium alloy, because the low alloying level of C ∏ 2 welding wires can not guarantee the joint necessary strength, this trend is more obvious when multilayer welding.The present invention promptly is at this problem, and developing the molybdenum equivalent and be 4.0～6.0 Ti-Al-Mo-V-Zr-Nb-RE is multi-element alloyed welding wire, welds various high-strength dual-phase titanium alloys with it, to obtain the welding point that intensity, plasticity and toughness index are all felt quite pleased.
Summary of the invention: the purpose of this invention is to provide a kind of multiple high-strength dual-phase titanium alloy welding wire that is applicable to.Technical solution of the present invention is that the alloying component of welding wire is (wt%): Al:3.0～5.0, Mo:1.5～3.0, V:1.5～3.0, Zr:1.0～2.0, Nb:3.0～5.0, Hf:0.1～0.3, Ti: surplus.
The method for preparing welding wire: (1) alloy A l, Zr, Hf add with 0 grade of sponge attitude, and Al, Mo, V, Nb add with Al base intermediate alloy form; (2) on vacuum consumable electrode arc furnace melting ingot casting 〉=3 times; (3) ingot casting is gone shrinkage cavity, behind the car epidermis, carry out cogging and forge, the forging standard is: 1100 ± 10 ℃ of heating-up temperatures, insulation 60min; (4) the scolder open die forging after cogging is forged is a bar, and the flat-die forging standard is: 950 ± 10 ℃ of heating-up temperatures, temperature retention time: 30～60min, temperature retention time with the bar cross section dwindle and corresponding shortening; (5) bar after the flat-die forging is carried out annealing in process earlier, the annealing standard is: 700 ± 10 ℃, and insulation 60min, air cooling rolls it on equipment of hot rolling then and is pencil rod; (6) pencil rod after the hot rolling is carried out drawing on wire-drawing equipment, in drawing process, constantly pencil rod is carried out annealing in process, the annealing standard is 700 ± 10 ℃, insulation 20min, and air cooling is until being the welding wire of target size with its drawing.Foil after the hot rolling or band line are cut into shape and the size that packing material requires.
Before using welding wire, it is carried out vacuum dehydrogenation handle.After welding wire pickling oven dry, put into the vacuum drying oven degasification.Acidwash solution is: HF+HNO
3The aqueous solution, thoroughly oven dry at least 3 hours in baking oven.The vacuum dehydrogenation standard is: 800 ± 10 ℃, insulation 180min cools off with stove.The present invention is suitable for the various high-strength dual-phase titanium alloys of welding.Experimental results show that, under identical specification of heat treatment, with the nearly 1200MPa of the tensile strength of its welding, nominal composition is the TC18 titanium alloy of Ti-5Al-4.75Mo-4.75V-1Cr-1Fe, strength of joint is 100% of a matrix material, and impact flexibility is 97% of matrix material; Greater than 1200MPa, nominal composition is the TC21 titanium alloy of Ti-6Al-2Sn-2Zr-2.5Mo-1.7Cr-2Nb-0.1Si with the tensile strength of its welding, and strength of joint is 100% of a matrix material, and impact flexibility is 95% of matrix material; With the nearly 1100MPa of the tensile strength of its welding, nominal composition is the TC6 titanium alloy of Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si, and strength of joint is 110% of a matrix material, and impact flexibility is 80% of matrix material.The present invention also can be processed as foil or web, welds various high-strength dual-phase titanium alloys as packing material.
The specific embodiment
Choose alloy (wt%): Al:3.0～5.0, Mo:1.5～3.0, V:1.5～3.0, Zr:1.0～2.0, Nb:3.0～5.0, Hf:0.1～0.3, Ti: surplus.
The preparation method of welding wire is:
(1) component of weld wire proportioning
Ti, Zr, Hf add with 0 grade of sponge attitude, and Al, Mo, V, Nb add with Al base intermediate alloy form;
(2) melting ingot casting
The welding wire ingot casting adopts at least three meltings of vacuum consumable electrode arc furnace, and is even to guarantee composition.
(3) cogging is forged
Ingot casting is gone shrinkage cavity, behind the car epidermis, carry out cogging and forge, the forging standard is: 1100 ± 10 ℃ of heating-up temperatures, insulation 60min.
(4) flat-die forging
Scolder open die forging after cogging forged is the bar of φ 14mm, and the flat-die forging standard is: 950 ± 10 ℃ of heating-up temperatures, temperature retention time: 30～60min, temperature retention time with the bar cross section dwindle and corresponding shortening.
(5) hot rolling
For eliminating stress, make even tissue, the bar after the flat-die forging is carried out annealing in process earlier, the annealing standard is: 700 ± 10 ℃, insulation 60min, air cooling.On equipment of hot rolling, it is rolled then and be pencil rod.
(6) processing of welding wire
Pencil rod after the hot rolling is carried out drawing on wire-drawing equipment, in drawing process, constantly pencil rod is carried out annealing in process, the annealing standard is 700 ± 10 ℃, insulation 20min, and air cooling is until being the welding wire of target size with its drawing.Foil after the hot rolling or band line are cut into shape and the size that packing material requires.
(7) vacuum dehydrogenation
Hydrogen is to the mechanical property of titanium, and especially the impact flexibility influence is very big, so must it be carried out vacuum dehydrogenation handle before welding wire use.After welding wire pickling oven dry, put into the vacuum drying oven degasification.
Acidwash solution is: HF+HNO
3The aqueous solution, thoroughly oven dry at least 3 hours in baking oven.
The vacuum dehydrogenation standard is: 800 ± 10 ℃, insulation 180min cools off with stove.
Embodiment 1:
Choose alloy (wt%): Al:5.0, Mo:1.5, V:3.0, Zr:2.0, Nb:3.0, Hf:0.1, Ti: surplus.
The preparation welding wire:
(1) component of weld wire proportioning
Ti, Zr, Hf add with 0 grade of sponge attitude, and Al, Mo, V, Nb add with Al base intermediate alloy form;
(2) melting ingot casting
The welding wire ingot casting adopts at least three meltings of vacuum consumable electrode arc furnace, and is even to guarantee composition.
(3) cogging is forged
Ingot casting is gone shrinkage cavity, behind the car epidermis, carry out cogging and forge, the forging standard is: 1100 ± 10 ℃ of heating-up temperatures, insulation 60min.
(4) flat-die forging
Scolder open die forging after cogging forged is thin bar, and the flat-die forging standard is: 950 ± 10 ℃ of heating-up temperatures, temperature retention time: 30～60min, temperature retention time with the scolder cross section dwindle and corresponding shortening.
(5) hot rolling
For eliminating stress, make even tissue, the bar after the flat-die forging is carried out annealing in process earlier, the annealing standard is: 700 ± 10 ℃, insulation 60min, air cooling.On equipment of hot rolling, it is rolled bar then for target size.
(6) drawing welding wire
The bar of target size is carried out drawing on wire-drawing equipment, for eliminating work hardening, need constantly bar to be carried out annealing in process, the annealing standard is 700 ± 10 ℃, insulation 20min, and air cooling is until the silk material that with its drawing is target size.
(7) vacuum dehydrogenation
Hydrogen is to the mechanical property of titanium, and especially the impact flexibility influence is very big, so must it be carried out vacuum dehydrogenation handle before welding wire use.After welding wire pickling oven dry, put into the vacuum drying oven degasification.
Acidwash solution is: HF+HNO
3The aqueous solution, thoroughly oven dry at least 3 hours in baking oven.
The vacuum dehydrogenation standard is: 800 ± 10 ℃, insulation 180min cools off with stove.
Embodiment 2
Choose alloy (wt%): Al:3.0, Mo:3.0, V:1.5, Zr:1.0, Nb:5.0, Hf:0.3, Ti: surplus.
The preparation packing material:
(1) packing material composition proportion
Ti, Zr, Hf add with 0 grade of sponge attitude, and Al, Mo, V, Nb add with Al base intermediate alloy form;
(2) melting ingot casting
Packing material adopts at least three meltings of vacuum consumable electrode arc furnace with ingot casting, and is even to guarantee composition.
(3) cogging is forged
Ingot casting is gone shrinkage cavity, behind the car epidermis, carry out cogging and forge, the forging standard is: 1100 ± 10 ℃ of heating-up temperatures, insulation 60min.
(4) flat-die forging
Packing material open die forging after cogging forged is thin bar, and the flat-die forging standard is: 950 ± 10 ℃ of heating-up temperatures, temperature retention time: 30～60min, temperature retention time with the packing material cross section dwindle and corresponding shortening.
(5) hot rolling
For eliminating stress, make even tissue, the thin bar after the flat-die forging is carried out annealing in process earlier, the annealing standard is: 700 ± 10 ℃, insulation 60min, air cooling.On equipment of hot rolling, it is rolled then and be band.
(6) band processing
Is the geomery that requires with band by the line cutting processing, when high-strength dual-phase titanium alloy melting welding it is carried out the transition to weld seam as packing material.
(7) vacuum dehydrogenation
Hydrogen is to the mechanical property of titanium, and especially the impact flexibility influence is very big, so must it be carried out vacuum dehydrogenation handle before packing material use.After packing material pickling oven dry, put into the vacuum drying oven degasification.
Acidwash solution is: HF+HNO
3The aqueous solution, thoroughly oven dry at least 3 hours in baking oven.
The vacuum dehydrogenation standard is: 800 ± 10 ℃, insulation 180min cools off with stove.
Claims (9)
1. high-strength dual-phase titanium alloy welding wire, the percentage by weight of its alloying component is: Al:3.0～5.0, Mo:1.5～3.0, V:1.5～3.0, Zr:1.0～2.0, Nb:3.0～5.0, Hf:0.1～0.3, Ti: surplus; The preparation method of welding wire is:
(1) alloy A l, Ti, Zr, Hf add with 0 grade of sponge attitude, and Al, Mo, V, Nb add with Al base intermediate alloy form;
(2) on vacuum consumable electrode arc furnace melting ingot casting 〉=3 times;
(3) ingot casting is gone shrinkage cavity, behind the car epidermis, carry out cogging and forge, the forging standard is: 1100 ± 10 ℃ of heating-up temperatures, insulation 60min;
(4) the scolder open die forging after cogging is forged is a bar, and the flat-die forging standard is: 950 ± 10 ℃ of heating-up temperatures, temperature retention time: 30～60min, temperature retention time with the scolder cross section dwindle and corresponding shortening;
(5), the bar after the flat-die forging is carried out annealing in process earlier, the annealing standard is: 700 ± 10 ℃, and insulation 60min, air cooling rolls it on equipment of hot rolling then and is pencil rod or foil or band;
(6) pencil rod after the hot rolling is carried out drawing on wire-drawing equipment, in drawing process, constantly pencil rod is carried out annealing in process, the annealing standard is 700 ± 10 ℃, insulation 20min, and air cooling is until being the welding wire of target size with its drawing.Foil after the hot rolling or band line are cut into shape and the size that packing material requires.
2. high-strength dual-phase titanium alloy welding wire according to claim 1 is characterized in that, this welding wire carried out vacuum dehydrogenation to it and handles before using, and after welding wire pickling oven dry, put into the vacuum drying oven degasification; Acidwash solution is: HF+HNO
3The aqueous solution, thoroughly oven dry in baking oven, the vacuum dehydrogenation standard is: 800 ± 10 ℃, insulation 180min cools off with stove.
3. high-strength dual-phase titanium alloy welding wire according to claim 1, its alloying component are Al:4.0, Mo:2.0, V:2.0, Zr:1.5, Nb:4.0, Hf:0.2, Ti: surplus.
4. high-strength dual-phase titanium alloy welding wire according to claim 1, its alloying component are Al:3.0, Mo:1.5, V:1.5, Zr:1.5, Nb:3.0, Hf:0.3, Ti: surplus.
5. high-strength dual-phase titanium alloy welding wire according to claim 1, its alloying component are Al:4.0, Mo:3.0, V:2.0, Zr:1.5, Nb:5.0, Hf:0.15, Ti: surplus.
6. high-strength dual-phase titanium alloy welding wire according to claim 1, its alloying component are Al:5.0, Mo:2.5, V:2.2, Zr:1.5, Nb:4.0, Hf:0.2, Ti: surplus.
7. high-strength dual-phase titanium alloy welding wire according to claim 1, its alloying component are Al:3.0, Mo:2.0, V:1.8, Zr:1.5, Nb:4.0, Hf:0.2, Ti: surplus.
8. high-strength dual-phase titanium alloy welding wire according to claim 1, its alloying component are Al:4.5, Mo:2.5, V:2.5, Zr:1.5, Nb:4.5, Hf:0.15, Ti: surplus.
9. high-strength dual-phase titanium alloy welding wire according to claim 1 is characterized in that, welding wire can be processed foil or the web that welds various high-strength dual-phase titanium alloys as packing material.
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