CN103537778A - Titaniumtim part surface overlaying and hardening technology - Google Patents
Titaniumtim part surface overlaying and hardening technology Download PDFInfo
- Publication number
- CN103537778A CN103537778A CN201310496467.5A CN201310496467A CN103537778A CN 103537778 A CN103537778 A CN 103537778A CN 201310496467 A CN201310496467 A CN 201310496467A CN 103537778 A CN103537778 A CN 103537778A
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- CN
- China
- Prior art keywords
- welding
- built
- titanium material
- material piece
- hardening process
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
Abstract
The invention discloses titaniumtim part surface overlaying and hardening technology. The titaniumtim part surface overlaying and hardening technology includes the steps that 1), a overlaying groove is machined in the surface of a parent material before welding; 2), a welding stick is prepared by adopting and cutting a sheet material which is identical with or similar to the parent material; 3), the overlaying groove is welded by adopting tungsten electrode mixed gas shielded welding; 4), two surfacing layers are welded and 4mm in total thickness, after overlaying, surfaces of the overlaying layers are subjected to machining so as to reserve the overlaying layers 2mm in thickness. The titaniumtim part surface overlaying and hardening technology is high in binding force, good in scratch resistance, simple in method, short in technological process, low in cost and easy to promote and use in production.
Description
Technical field
The invention belongs to metal material surface hardening technique field, be specifically related to titanium material piece surface built-up welding hardening process.
Background technology
Titanium material has excellent resistance to corrosion, at Aero-Space, ship structure and civil area, is applied widely.But the resistance to scratch in surface and the abrasion resistance properties of titanium but can not be satisfactory.The hardness of pure titanium only has HRC15, with it, makes the seal of valve, and its hardness is far from being enough.Especially in having the sealing pair of relative sliding, as the flashboard of slide valve, the flap of stop valve, the ball seat of hard sealing etc.In order to improve the anti-wear performance of titanium and alloy thereof, after deliberation kinds of surface treatment technology, as differential arc oxidation, plating and chemical plating, nitriding, Implantation, vapour deposition, plasma spraying etc.There is following shortcoming in these methods:
1, for electroplating and chemical plating, for improving the adhesion of coating and matrix, need to strictly plate pre-treatment and plating after-baking, technological process is complicated, and easily produces the discarded object of contaminated environment.
2,, for differential arc oxidation, bath composition, temperature, time, electrical quantity etc. are larger on sull impact; Unit are power consumption is larger, has limited the area of processing work; Oxide-film and basal body binding force are poor.
3, for nitriding, Implantation, vapour deposition, plasma spraying etc., equipment investment is larger, and technology difficulty is large.In wearing and tearing, wash away under very harsh working condition, the meagre hardened layer that only depends on this several technique to form can not meet instructions for use.
Summary of the invention
The technical problem to be solved in the present invention is to provide titanium material piece surface built-up welding hardening process, reaches the object that adhesion is strong, marresistance energy is good, method is simple, technological process is short, cost is low, be easy to apply aborning.
For achieving the above object, technical scheme of the present invention is as follows:
Titanium material piece surface built-up welding hardening process, comprises the following steps:
1) before weldering, in mother metal Surface Machining, pile weld groove,
2) welding wire is prepared: welding wire adopts the plate shears system identical or close with quality of parent material to form,
3) adopt tungsten electrode mixed gas arc welding to weld heap weld groove,
4) overlay cladding welding is 2 layers, and overlay cladding gross thickness 4mm, after built-up welding completes, carries out machining to overlay cladding surface, retains layer thickness 2mm.
In a preferred embodiment of the invention, described built-up welding groove depth is 2.5mm, and described heap weld groove and horizontal plane angle are 45 degree.
In a preferred embodiment of the invention, described step 2) after cutting the welding wire of making and carrying out vacuum annealing and then welding wire is cleaned with alcohol, dry and continue to employ.
In a preferred embodiment of the invention, the bead-welding technology parameter of described step 3) is: welding current 120～160A, arc voltage 12～14V, speed of welding 15cm/min, argon flow amount 12～15L/min, 2 layers of the welding numbers of plies, guarantee 200 ℃ of interlayer temperature <.
In a preferred embodiment of the invention, in described step 3), protective gas mixed proportion is 85% argon gas+10% oxygen+5% nitrogen.
In a preferred embodiment of the invention, described mist meets following purity, purity of argon >=99.99% wherein, oxygen purity >=99.6%, nitrogen gas purity >=99.5%.
In a preferred embodiment of the invention, the torch neck that tungsten electrode mixed gas arc welding adopts is selected long nozzle, and before welding, adjusts welding gun tungsten electrode and stretch out nozzle 8～10mm.
By technique scheme, the invention has the beneficial effects as follows:
1, because surfacing equipment only needs a set of GTAW equipment, two gas proportioning devices and three gas cylinders, equipment investment is little.
2, because GTAW technology is easy to learning and mastering, operation easier is little.
3, by processing heap weld groove before welding, postwelding processing overlaying surface, is easy to the thin hardened layer that assurance needs.
4, hardened layer obtains by fusing built-up welding, and bond strength is high, can not come off.
5, compare with techniques such as plating, chemical platings, bead-welding technology can not produce the discarded object of contaminated environment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other embodiment.
Fig. 1 is argon-arc welding gun nozzle schematic diagram of the present invention.
Fig. 2 is protective gas of the present invention and adds gas device schematic diagram.
Fig. 3 is the flap built-up welding schematic diagram of the embodiment of the present invention, position when A face represents that overlay cladding is machined to finished product.
Drawing reference numeral explanation: 201---nitrogen cylinder; 202---oxygen cylinder; 203---argon bottle; 204-nitrogen cylinder valve; 205-oxygen cylinder valve; 206-argon gas cylinder valve; 207-nitrogen cylinder flowmeter; 208-oxygen cylinder flowmeter; 209-argon bottle flowmeter; 210-the first gas proportioning device; 211-the second gas proportioning device.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
With reference to Fig. 1, be argon-arc welding gun nozzle schematic diagram of the present invention, wherein nozzle is inverted trapezoidal shape, nozzle total length 56mm,
With reference to Fig. 2, by argon gas (Ar), oxygen (O
2), nitrogen (N
2) etc. by shown in Fig. 2, connect, nitrogen cylinder 201 is successively by nitrogen cylinder valve 204, nitrogen cylinder flowmeter 207 access the first gas proportioning devices 210,
Argon bottle 203 is successively by argon gas cylinder valve 206, and argon bottle flowmeter 209 accesses the second gas proportioning devices 211,
Described the first gas proportioning device 210 is communicated with the second gas proportioning device 211.
By flowmeter, control the flow of each gas, press 85%Ar+10%O
2+ 5%N
2ratio debug.Gas is through flowmeter and proportioner, then imports welding gun air inlet pipe.
With reference to Fig. 3, be flap built-up welding schematic diagram, position when A face represents that overlay cladding is machined to finished product.
(1) processing before weldering: the surface that titanium material workpiece is treated built-up welding, the heap weld groove 300 that preprocessing 2.5mm is dark, and described heap weld groove 300 is 45 degree with horizontal plane angle.
(2) welding wire is prepared: the thick titanium plate of 2mm is trimmed to 3～3.5mm wide.
(3) welding wire shearing is carried out to vacuum annealing.
(4) after again welding wire being cleaned with alcohol before weldering, dry.
(5) gas shield device is prepared: by argon gas (Ar), oxygen (O
2), nitrogen (N
2) etc. by shown in Fig. 2, connect, by flowmeter, control the flow of each gas, press 85%Ar+10%O
2+ 5%N
2ratio debug, Ar purity>=99.99% wherein, O
2purity>=99.6%, N
2purity>=99.5%.Gas is through flowmeter and proportioner, then imports welding gun air inlet pipe.
(6) the long nozzle shown in Fig. 1 is installed on argon-arc welding gun.
(7) adjust welding gun tungsten electrode, make it stretch out the long 8～10mm of nozzle.
(8) by titanium material piece-holder on copper three-jaw, carry out surface overlaying.Technological specification: welding current 120～160A, arc voltage 12～14V, speed of welding 15cm/min, argon flow amount 12～15L/min, 2 layers of the welding numbers of plies, guarantee 200 ℃ of interlayer temperature <.
The overlay cladding 200 of completion of processing is 2 layers, and overlay cladding 200 gross thickness 4mm, after built-up welding completes, carry out machining to overlay cladding 200 surfaces, retains layer thickness 2mm.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. titanium material piece surface built-up welding hardening process, is characterized in that, comprises the following steps:
1) before weldering, in mother metal Surface Machining, pile weld groove,
2) welding wire is prepared: welding wire adopts the plate shears system identical or close with quality of parent material to form,
3) adopt tungsten electrode mixed gas arc welding to weld heap weld groove,
4) overlay cladding welding is 2 layers, and overlay cladding gross thickness 4mm, after built-up welding completes, carries out machining to overlay cladding surface, retains layer thickness 2mm.
2. titanium material piece surface built-up welding hardening process according to claim 1, is characterized in that: described built-up welding groove depth is 2.5mm, and described heap weld groove and horizontal plane angle are 45 degree.
3. titanium material piece surface built-up welding hardening process according to claim 1, is characterized in that: after described step 2) cutting the welding wire of making and carrying out vacuum annealing and then welding wire is cleaned with alcohol, dry and continue to employ.
4. titanium material piece surface built-up welding hardening process according to claim 1, it is characterized in that: the bead-welding technology parameter of described step 3) is: welding current 120～160A, arc voltage 12～14V, speed of welding 15cm/min, argon flow amount 12～15L/min, 2 layers of the welding numbers of plies, guarantee 200 ℃ of interlayer temperature <.
5. titanium material piece surface built-up welding hardening process according to claim 1, is characterized in that: in described step 3), protective gas mixed proportion is 85% argon gas+10% oxygen+5% nitrogen.
6. titanium material piece surface built-up welding hardening process according to claim 1, is characterized in that: described mist meets following purity, purity of argon >=99.99% wherein, oxygen purity >=99.6%, nitrogen gas purity >=99.5%.
7. titanium material piece surface built-up welding hardening process according to claim 1, is characterized in that: the torch neck that tungsten electrode mixed gas arc welding adopts is selected long nozzle, and before welding, adjusts welding gun tungsten electrode and stretch out nozzle 8～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496467.5A CN103537778A (en) | 2013-10-21 | 2013-10-21 | Titaniumtim part surface overlaying and hardening technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496467.5A CN103537778A (en) | 2013-10-21 | 2013-10-21 | Titaniumtim part surface overlaying and hardening technology |
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|---|---|
| CN103537778A true CN103537778A (en) | 2014-01-29 |
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| CN201310496467.5A Pending CN103537778A (en) | 2013-10-21 | 2013-10-21 | Titaniumtim part surface overlaying and hardening technology |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06218479A (en) * | 1993-01-20 | 1994-08-09 | Daido Steel Co Ltd | Method and device for forming surface of metal material |
| CN101391339A (en) * | 2008-11-12 | 2009-03-25 | 中国航空工业第一集团公司北京航空材料研究院 | Method for thinning welding-seam organization and increasing welding-seam ductility during welding the titanium alloy |
| CN101412138A (en) * | 2007-10-17 | 2009-04-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Overlaying welding technique of carbide alloy on turbine blade serrated shroud |
| CN102615402A (en) * | 2012-04-25 | 2012-08-01 | 山东大学 | Tungsten electrode argon arc welding method for filler wires of titanium alloy and aluminum alloy |
| CN103008386A (en) * | 2012-11-30 | 2013-04-03 | 洛阳双瑞精铸钛业有限公司 | Preparation method of thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe |
| CN103143821A (en) * | 2011-12-06 | 2013-06-12 | 沈阳鼓风机集团股份有限公司 | Fixed-position welding process for casting titanium alloy connecting rod |
-
2013
- 2013-10-21 CN CN201310496467.5A patent/CN103537778A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06218479A (en) * | 1993-01-20 | 1994-08-09 | Daido Steel Co Ltd | Method and device for forming surface of metal material |
| CN101412138A (en) * | 2007-10-17 | 2009-04-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Overlaying welding technique of carbide alloy on turbine blade serrated shroud |
| CN101391339A (en) * | 2008-11-12 | 2009-03-25 | 中国航空工业第一集团公司北京航空材料研究院 | Method for thinning welding-seam organization and increasing welding-seam ductility during welding the titanium alloy |
| CN103143821A (en) * | 2011-12-06 | 2013-06-12 | 沈阳鼓风机集团股份有限公司 | Fixed-position welding process for casting titanium alloy connecting rod |
| CN102615402A (en) * | 2012-04-25 | 2012-08-01 | 山东大学 | Tungsten electrode argon arc welding method for filler wires of titanium alloy and aluminum alloy |
| CN103008386A (en) * | 2012-11-30 | 2013-04-03 | 洛阳双瑞精铸钛业有限公司 | Preparation method of thickness-diameter ratio longitudinal titanium and titanium alloy welded pipe |
Non-Patent Citations (2)
| Title |
|---|
| 李斌: "钛合金熔敷金属焊道表面的紫色氧化色对力学性能的影响", 《中国核学会核材料分会2007年度学术交流会》, 31 December 2007 (2007-12-31) * |
| 杨永良: "TA2堆焊锆合金工艺试验", 《热加工工艺》, vol. 42, no. 15, 31 August 2013 (2013-08-31), pages 178 - 179 * |
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