CN101913022B - Method for welding dissimilar materials of TA15 titanium alloy and chromium bronze through electron beams - Google Patents
Method for welding dissimilar materials of TA15 titanium alloy and chromium bronze through electron beams Download PDFInfo
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- CN101913022B CN101913022B CN2010102781479A CN201010278147A CN101913022B CN 101913022 B CN101913022 B CN 101913022B CN 2010102781479 A CN2010102781479 A CN 2010102781479A CN 201010278147 A CN201010278147 A CN 201010278147A CN 101913022 B CN101913022 B CN 101913022B
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Abstract
The invention discloses a method for welding dissimilar materials of TA15 titanium alloy and chromium bronze through electron beams, belongs to the field of dissimilar material fusion welding and solves the problem of low tensile strength of a welding joint, which is caused by inter-metallic compound laminated structure easily generated during the traditional electron beam welding of dissimilar materials of the TA15 titanium alloy and chromium bronze. In the invention, the welding targets are a TA15 titanium alloy base material and a QCr0.8 chromium bronze alloy base material. The invention adopts two times of electron beam welding to weld, namely, the joint of the TA15 titanium alloy base material and the QCr0.8 chromium bronze alloy base material is welded by the traditional welding method and then an electron beam focusing position is moved by 0.2 to 1.0mm to the QCr0.8 chromium bronze alloy base material for the second time of welding. The joint organization structure is improved and adverse effects of compounds between metals are reduced by a superposition welding method by designing the electron beam focusing welding position. The method of the invention is suitable for welding plates or tubes made of the two materials, namely aTA15 titanium alloy and a QCr0.8 chromium bronze alloy.
Description
Technical field
The present invention relates to TA15 titanium alloy and QCr0.8 chromium-bronze alloy electron beam welding method for dissimilar materials, belong to foreign material molten solder field.
Background technology
The TA15 titanium alloy is a kind of good structural material; Have characteristics such as density is little, specific strength is high, plasticity and toughness are good, heat-proof corrosion-resistant property is good, machinability is good, have very important using value in fields such as Aeronautics and Astronautics, Vehicle Engineering, biomedical engineerings.QCr0.8 chromium-bronze alloy has good electrical and thermal conductivity performance, ductility and good corrosion resistance.Thereby all obtained using widely in industry such as electric, electronics, chemical industry, power, traffic and Aero-Space and military service.
The welding of foreign material receives people's attention day by day; Be characterized in that the advantage separately that can maximally utilise material satisfies modern production to the many-sided requirement of material structure performance; In some cases, the combination property of foreign material even surpass single metal structure.
The TA15 titanium alloy with effective connection of QCr0.8 chromium-bronze alloy foreign material can satisfy thermal conductivity, wearability, corrosion proof requirement, can satisfy the requirement of high-strength light again, will gather around in fields such as Aero-Space, shipbuilding, instrument and have broad application prospects.
Adopt existing electro-beam welding method to realize the welding of TA15 titanium alloy and chromium-bronze foreign material; In weld seam, form lamellar tissue's structure of forming by intermetallic compound easily; This kind lamellar tissue structure is the weak location in the joint, and the tensile strength of the joint location of foreign material is reduced.The rational method that addresses this problem does not both at home and abroad at present appear in the newspapers as yet.
Summary of the invention
The objective of the invention is to solve the TA15 titanium alloy and the electron beam welding of chromium-bronze foreign material is easy to generate intermetallic compounds layer shape structure, and then cause the low problem of welding point tensile strength.
The method of electron beam welding TA15 titanium alloy of the present invention and chromium-bronze foreign material; Its welding object is TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal; Said welding method adopts the method for twice welding to accomplish welding; Detailed process is: after butt welded seam is accomplished welding, the electron beam focal position to QCr0.8 chromium-bronze alloy mother metal one side shifting 0.2mm～1.0mm, is carried out the welding second time.
When said TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal were thickness and are the sheet material of 1.5mm～5.0mm, the detailed process of welding method of the present invention was:
Step 1, TA15 titanium alloy plate to be welded and QCr0.8 chromium-bronze alloy board are carried out preliminary treatment;
The relative position of step 2, adjustment TA15 titanium alloy plate and QCr0.8 chromium-bronze alloy board, the difference in height of interface that makes the two boards material be less than 0.2mm, and make two slits between the interface less than 0.1mm; Guarantee that with clamps the relative position between the two boards material is constant then;
Step 3, with step 2 obtain fixing after the two boards material put into vacuum chamber, this vacuum chamber is vacuumized, make vacuum in this vacuum chamber 5 * 10
-2Pa to 5 * 10
-4The Pa scope;
Step 4, electron beam is focused to the butt joint slit place of two boards material, begin welding till the other end from the end in this slit; Operating distance during welding is 150mm, and accelerating potential is 55kV, and focus current is 2590mA, and electronic beam current is 15mA～50mA, and speed of welding is 4mm/s～12mm/s;
Step 5, with the electron beam focal position to QCr0.8 chromium-bronze alloy board one side shifting 0.2mm～1.0mm; Begin welding for the second time then; This time the track of welding and the welding track in the step 4 parallel, and the accelerating potential during welding is 55kV, and focus current is 2590mA; Electronic beam current is 12mA～45mA, and speed of welding is 5mm/s～12mm/s;
Step 6, vacuum chamber cooling 8min to 12min go vacuum then and take out the test specimen that welding is accomplished, and welding is accomplished.
When said TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal were wall thickness and are the tubing of 1.5mm～5.0mm, the weld seam of welding was annular butt weld, and the process of welding method of the present invention is:
Step 1, the tubing of TA15 titanium alloy pipe to be welded and QCr0.8 chromium-bronze alloy is carried out preliminary treatment;
The relative position of step 2, two tubing of adjustment, the misalignment of interface that makes two tubing be less than 0.2mm, and the slit between these two interfaces uses clamps then less than 0.1mm, makes that relative position is constant between two tubing;
Step 3, two tubing that will fix are put into vacuum chamber, vacuumize, and make vacuum in this vacuum chamber 5 * 10
-2Pa to 5 * 10
-4Between the Pa;
Step 4, electron beam is focused to the butt joint slit place of two tubing, begin welding, the operating distance during welding is 150mm; Accelerating potential is 55kV, and focus current is 2590mA, and electronic beam current is 15mA～50mA; Speed of welding is 5mm/s～12mm/s, and the welding stroke is 450 degree;
Step 5, the electron beam focal position is moved 0.2mm～1.0mm to QCr0.8 chromium-bronze alloy pipe fitting side; Begin welding for the second time then, this time the track of welding and the welding track in the step 4 parallel, and accelerating potential is 55kV during welding; Focus current is 2590mA; Electronic beam current is 12mA～45mA, and speed of welding is 5mm/s～12mm/s, and the welding stroke is 450 degree;
Step 6, vacuum chamber cooling 8min to 12min go vacuum then and take out the test specimen that welding is accomplished, and welding is accomplished.
TA15 titanium alloy component of the present invention is that Al:5.5～7.0% (weight), V:0.8～2.5% (weight), Zr:1.5～2.5% (weight), Mo:0.5～2.0% (weight), surplus are Ti; QCr0.8 chromium-bronze alloying component is Cr:0.4～0.7% (weight), impurity≤0.8% (weight), and surplus is Cu.
It is lower to adopt conventional electro-beam welding method that TA15 titanium alloy and QCr0.8 chromium-bronze alloy are carried out strength of welded joint, is merely about 40% of QCr0.8 chromium-bronze alloy mother metal.The present invention and conventional welding method difference are to utilize the method for stack welding, and interface, the deflection QCr0.8 chromium-bronze alloy side certain distance to TA15 titanium alloy and QCr0.8 chromium-bronze alloy carries out electron beam welding respectively.Can make TA15 titanium alloy and QCr0.8 chromium-bronze alloy weld seam form excellent metallurgical on the one hand and combine, joint does not have weld defects such as pore, crackle; Can the intermetallic compounds layer shape structure of weld seam and the formation of QCr0.8 chromium-bronze alloy side be weakened even eliminate on the other hand; Obtain the seam organization of continuous distributed; Thereby can joint tensile strength be brought up to more than 70% of QCr0.8 chromium-bronze alloy mother metal, can obtain the high-strength jointing of high-quality.
The specific embodiment
The specific embodiment one: the method for described a kind of electron beam welding TA15 titanium alloy of this embodiment and chromium-bronze foreign material; Its welding object is TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal; Said welding method is accomplished welding for the method that adopts twice welding; Detailed process is: after butt welded seam is accomplished welding; With the electron beam focal position to QCr0.8 chromium-bronze alloy mother metal one side shifting 0.2mm～1.0mm; Carry out second time welding, the described TA15 titanium alloy component of this embodiment is that Al:5.5～7.0% (weight), V:0.8～2.5% (weight), Zr:1.5～2.5% (weight), Mo:0.5～2.0% (weight), surplus are Ti; QCr0.8 chromium-bronze alloying component is Cr:0.4～0.7% (weight), impurity≤0.8% (weight), and surplus is Cu.
This embodiment focuses on the welding position through designing electron beam, utilizes the method for stack welding to improve the joint microstructure structure, reduces or eliminate the adverse effect of intermetallic compound, obtains the high-strength jointing of high-quality.
The specific embodiment two a: specific embodiment of the method for this embodiment and the specific embodiment one described a kind of electron beam welding TA15 titanium alloy and chromium-bronze foreign material; TA15 titanium alloy mother metal in this embodiment and QCr0.8 chromium-bronze alloy mother metal all are that thickness is the sheet material of 1.5mm～5.0mm, and concrete welding method is:
Step 1, TA15 titanium alloy plate to be welded and QCr0.8 chromium-bronze alloy board are carried out preliminary treatment;
The relative position of step 2, adjustment TA15 titanium alloy plate and QCr0.8 chromium-bronze alloy board, the difference in height of interface that makes the two boards material be less than 0.2mm, and make two slits between the interface less than 0.1mm; Guarantee that with clamps the relative position between the two boards material is constant then, execution in step three then;
Step 3, with step 2 obtain fixing after the two boards material put into vacuum chamber, this vacuum chamber is vacuumized, make vacuum in this vacuum chamber 5 * 10
-2Pa to 5 * 10
-4The Pa scope;
Step 4, electron beam is focused to the butt joint slit place of two boards material, begin welding till the other end from the end in this slit; Operating distance during welding is 150mm, and accelerating potential is 55kV, and focus current is 2590mA, and electronic beam current is 15mA～50mA, and speed of welding is 4mm/s～12mm/s;
Step 5, with the electron beam focal position to QCr0.8 chromium-bronze alloy board one side shifting 0.2mm～1.0mm; Begin welding for the second time then; This time the track of welding and the welding track in the step 4 parallel, and the accelerating potential during welding is 55kV, and focus current is 2590mA; Electronic beam current is 12mA～45mA, and speed of welding is 5mm/s～12mm/s;
Step 6, vacuum chamber cooling 8min to 12min go vacuum then and take out the test specimen that welding is accomplished,, welding is accomplished.
The specific embodiment three: this embodiment is that with the difference of the method for the specific embodiment two described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the preliminary treatment described in the step 1 comprises mechanical grinding and Chemical cleaning.
The specific embodiment four: this embodiment is that with the difference of the method for the specific embodiment two described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the fixed form described in the said step 2 adopts the upper surface load mode.Specifically can be respectively the end points at the two ends of two boards material be exerted pressure, guarantee that test specimen is not moved in the welding process.
The specific embodiment five: this embodiment is that with the difference of the method for the specific embodiment two described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the vacuum in the vacuum chamber described in the step 3 is 5 * 10
-3Pa to 5 * 10
-4Pa.
The specific embodiment six: this embodiment is that with the difference of the method for the specific embodiment two described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the thickness of said welding object is 1.5mm～3.0mm, in welding process,
In step 4, electronic beam current is 15mA～30mA, and speed of welding is 8mm/s～12mm/s;
In step 5, the electron beam focal position to QCr0.8 chromium-bronze alloy board one side shifting 0.2mm～0.6mm, is begun welding for the second time then, this time the electronic beam current of welding is 12mA～25mA, speed of welding is 8mm/s～12mm/s.
The specific embodiment seven: this embodiment is that with the difference of the method for the specific embodiment two described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the thickness of said welding object is 3.5mm～5.0mm, in welding process:
In step 4, electronic beam current is 30mA～50mA, and speed of welding is 5mm/s～8mm/s;
In step 5, the electron beam focal position is moved 0.6～1.0mm to the QCr0.8 chromium-bronze alloy board, begin welding for the second time then, this time the electronic beam current of welding is 25mA～45mA, speed of welding is 5mm/s～8mm/s.
The specific embodiment eight a: specific embodiment of the method for this embodiment and the specific embodiment one described a kind of electron beam welding TA15 titanium alloy and chromium-bronze foreign material; TA15 titanium alloy mother metal in this embodiment and QCr0.8 chromium-bronze alloy mother metal all are that wall thickness is the tubing of 1.5mm～5.0mm; The weld seam of welding is annular butt weld, and concrete steps are:
Step 1, the tubing of TA15 titanium alloy pipe to be welded and QCr0.8 chromium-bronze alloy is carried out preliminary treatment;
The relative position of step 2, two tubing of adjustment, the misalignment of interface that makes two tubing be less than 0.2mm, and the slit between these two interfaces uses clamps then less than 0.1mm, makes that relative position is constant between two tubing;
Step 3, two tubing that will fix are put into vacuum chamber, vacuumize, and make vacuum in this vacuum chamber 5 * 10
-2Pa to 5 * 10
-4Between the Pa;
Step 4, electron beam is focused to the butt joint slit place of two tubing, begin welding, the operating distance during welding is 150mm; Accelerating potential is 55kV, and focus current is 2590mA, and electronic beam current is 15mA～50mA; Speed of welding is 5mm/s～12mm/s, and the welding stroke is 450 degree;
Step 5, the electron beam focal position is moved 0.2～1.0mm to QCr0.8 chromium-bronze alloy pipe fitting side; Begin welding for the second time then, this time the track of welding and the welding track in the step 4 parallel, and accelerating potential is 55kV during welding; Focus current is 2590mA; Electronic beam current is 12mA～45mA, and speed of welding is 5mm/s～12mm/s, and the welding stroke is 450 degree;
Step 6, vacuum chamber cooling 8min to 12min go vacuum then and take out the test specimen that welding is accomplished, and welding is accomplished.
The specific embodiment nine: this embodiment is that with the difference of the method for the specific embodiment eight described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the preliminary treatment described in the step 1 comprises mechanical grinding and Chemical cleaning.
The specific embodiment ten: this embodiment is with the difference of the method for the specific embodiment eight described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material, adopts the evenly mode of loading of two ends in the fixed form described in the step 2.Specifically can exert pressure to the two ends of two pipe fittings respectively, guarantee that test specimen is not moved in the welding process.
The specific embodiment 11: this embodiment is that with the difference of the method for the specific embodiment eight described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the vacuum in the vacuum chamber described in the step 3 is 5 * 10
-3Pa to 5 * 10
-4Pa.
The specific embodiment 12: this embodiment is that with the difference of the method for the specific embodiment eight described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the wall thickness of said welding object is 1.5mm～3.0mm, in welding process:
In step 4, electronic beam current is 15mA～30mA, and speed of welding is 8mm/s～12mm/s;
In step 5, the electron beam focal position is moved 0.2mm～0.6mm to QCr0.8 chromium-bronze alloy pipe fitting side, begin welding for the second time then, this time the electronic beam current in the welding is 12mA～25mA, speed of welding is 8mm/s～12mm/s.
The specific embodiment 13: this embodiment is that with the difference of the method for the specific embodiment eight described a kind of electron beam welding TA15 titanium alloys and chromium-bronze foreign material the wall thickness of said welding object is 3.0mm～5.0mm, in welding process:
In step 4, electronic beam current is 30mA～50mA, and speed of welding is 5mm/s～8mm/s;
In step 5, the electron beam focal position to QCr0.8 chromium-bronze alloy pipe side shifting 0.6mm～1.0mm, is begun welding for the second time then, this time the electronic beam current in the welding is 25mA～45mA, speed of welding is 5mm/s～8mm/s.
Claims (10)
1. the method for electron beam welding TA15 titanium alloy and chromium-bronze foreign material; Its welding object is TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal; Adopt the electro-beam welding method butt welded seam to weld; It is characterized in that; Said welding method adopts the method for twice welding to accomplish welding, and detailed process is: after butt welded seam is accomplished welding, with the electron beam focal position to QCr0.8 chromium-bronze alloy mother metal one side shifting 0.2mm～1.0mm; Carry out second time welding, described TA15 titanium alloy component is that Al:5.5～7.0% (weight), V:0.8～2.5% (weight), Zr:1.5～2.5% (weight), Mo:0.5～2.0% (weight), surplus are Ti; QCr0.8 chromium-bronze alloying component is Cr:0.4～0.7% (weight), impurity≤0.8% (weight), and surplus is Cu; The track of welding parallels with the track of welding for the first time for the second time.
2. the method for a kind of electron beam welding TA15 titanium alloy according to claim 1 and chromium-bronze foreign material; It is characterized in that; Said TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal all are that thickness is the sheet material of 1.5mm～5.0mm, and concrete welding process is:
Step 1, TA15 titanium alloy plate to be welded and QCr0.8 chromium-bronze alloy board are carried out preliminary treatment;
The relative position of step 2, adjustment TA15 titanium alloy plate and QCr0.8 chromium-bronze alloy board, the misalignment of interface that makes the two boards material be less than 0.2mm, and make two slits between the interface less than 0.1mm; Use clamps two boards material then, make that the relative position between the two boards material is constant;
Step 3, with step 2 obtain fixing after the two boards material put into vacuum chamber, this vacuum chamber is vacuumized, make vacuum in this vacuum chamber 5 * 10
-2Pa to 5 * 10
-4In the Pa scope;
Step 4, electron beam is focused to the butt joint slit place of two boards material, begin welding till the other end from the end in this slit; Operating distance during welding is 150mm, and accelerating potential is 55kV, and focus current is 2590mA, and electronic beam current is 15mA～50mA, and speed of welding is 4mm/s～12mm/s;
Step 5, with the electron beam focal position to QCr0.8 chromium-bronze alloy board one side shifting 0.2mm～1.0mm; Begin welding for the second time then; This time the track of welding and the welding track in the step 4 parallel, and the accelerating potential during welding is 55kV, and focus current is 2590mA; Electronic beam current is 12mA～45mA, and speed of welding is 5mm/s～12mm/s;
Step 6, vacuum chamber cooling 8min to 12min go vacuum then and take out the test specimen that welding is accomplished, and welding is accomplished.
3. the method for a kind of electron beam welding TA15 titanium alloy according to claim 2 and chromium-bronze foreign material is characterized in that the preliminary treatment described in the step 1 comprises mechanical grinding and Chemical cleaning.
4. the method for a kind of electron beam welding TA15 titanium alloy according to claim 2 and chromium-bronze foreign material is characterized in that the fixed form described in the step 2 is the upper surface load mode.
5. the method for a kind of electron beam welding TA15 titanium alloy according to claim 2 and chromium-bronze foreign material; It is characterized in that; Said welding object is that thickness is TA15 titanium alloy plate and the QCr0.8 chromium-bronze alloy board of 1.5mm～3.0mm, in welding process
In step 4, electronic beam current is 15mA～30mA, and speed of welding is 8mm/s～12mm/s;
In step 5, the electron beam focal position to QCr0.8 chromium-bronze alloy board one side shifting 0.2mm～0.6mm, is begun welding for the second time then, this time the electronic beam current of welding is 12mA～25mA, speed of welding is 8mm/s～12mm/s.
6. the method for a kind of electron beam welding TA15 titanium alloy according to claim 2 and chromium-bronze foreign material; It is characterized in that; Said welding object is that thickness is TA15 titanium alloy plate and the QCr0.8 chromium-bronze alloy board of 3.5mm～5.0mm, in welding process:
In step 4, electronic beam current is 30mA～50mA, and speed of welding is 5mm/s～8mm/s;
In step 5, the electron beam focal position is moved 0.6mm～1.0mm to the QCr0.8 chromium-bronze alloy board, begin welding for the second time then, this time the electronic beam current of welding is 25mA～45mA, speed of welding is 5mm/s～8mm/s.
7. the method for a kind of electron beam welding TA15 titanium alloy according to claim 1 and chromium-bronze foreign material; It is characterized in that; To be that two endwalls are thick be the tubing of 1.5mm～5.0mm for said TA15 titanium alloy mother metal and QCr0.8 chromium-bronze alloy mother metal; The weld seam of welding is annular butt weld, and concrete steps are:
Step 1, the tubing of TA15 titanium alloy pipe to be welded and QCr0.8 chromium-bronze alloy is carried out preliminary treatment;
The relative position of step 2, two tubing of adjustment, the difference in height of interface that makes two tubing be less than 0.2mm, and the slit between these two interfaces uses clamps then less than 0.1mm, makes that relative position is constant between two tubing;
Step 3, two tubing that will fix are put into vacuum chamber, vacuumize, and make vacuum in this vacuum chamber 5 * 10
-2Pa to 5 * 10
-4Between the Pa;
Step 4, electron beam is focused to the butt joint slit place of two tubing, begin welding, the operating distance during welding is 150mm; Accelerating potential is 55kV, and focus current is 2590mA, and electronic beam current is 15mA～50mA; Speed of welding is 5mm/s～12mm/s, and the welding stroke is 450 degree;
Step 5, the electron beam focal position is moved 0.2mm～1.0mm to QCr0.8 chromium-bronze alloy pipe fitting side; Begin welding for the second time then, this time the track of welding and the welding track in the step 4 parallel, and accelerating potential is 55kV during welding; Focus current is 2590mA; Electronic beam current is 12mA～45mA, and speed of welding is 5mm/s～12mm/s, and the welding stroke is 450 degree;
Step 6, vacuum chamber cooling 8min to 12min go vacuum then and take out the test specimen that welding is accomplished, and welding is accomplished.
8. the method for a kind of electron beam welding TA15 titanium alloy according to claim 7 and chromium-bronze foreign material is characterized in that, adopts the evenly mode of loading of two ends in the fixed form described in the step 2.
9. the method for a kind of electron beam welding TA15 titanium alloy according to claim 7 and chromium-bronze foreign material; It is characterized in that; Said welding object is that wall thickness is TA15 titanium alloy pipe and the QCr0.8 chromium-bronze alloy pipe of 1.5mm～3.0mm, in welding process:
In step 4, electronic beam current is 15mA～30mA, and speed of welding is 8mm/s～12mm/s;
In step 5, the electron beam focal position is moved 0.2mm～0.6mm to QCr0.8 chromium-bronze alloy pipe fitting side, begin welding for the second time then, this time the electronic beam current in the welding is 12mA～25mA, speed of welding is 8mm/s～12mm/s.
10. the method for a kind of electron beam welding TA15 titanium alloy according to claim 7 and chromium-bronze foreign material; It is characterized in that; Said welding object is the thick tubing for the TA15 titanium alloy pipe of 3.0mm～5.0mm and QCr0.8 chromium-bronze alloy of two endwalls, in welding process:
In step 4, electronic beam current is 30mA～50mA, and speed of welding is 5mm/s～8mm/s;
In step 5, the electron beam focal position to QCr0.8 chromium-bronze alloy pipe side shifting 0.6mm～1.0mm, is begun welding for the second time then, this time the electronic beam current in the welding is 25mA～45mA, speed of welding is 5mm/s～8mm/s.
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| CN103008869B (en) * | 2012-12-14 | 2015-06-24 | 哈尔滨工业大学 | Electron beam pressurizing connection method for aluminum alloy and particle-reinforced aluminum matrix composite material |
| CN104493431B (en) * | 2014-11-19 | 2018-04-13 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of method of aircraft fold mechanism stress corrosion resistant |
| CN106346126B (en) * | 2016-09-29 | 2019-01-18 | 南京理工大学 | A kind of titanium alloy and red copper dissimilar metal electro-beam welding method |
| CN106808212A (en) * | 2017-03-02 | 2017-06-09 | 番禺珠江钢管（连云港）有限公司 | A kind of dissimilar metal lamination is combined into set assembly equipment and combination blank technology |
| CN110883416B (en) * | 2019-12-18 | 2021-09-28 | 西安西工大超晶科技发展有限责任公司 | Electron beam welding method for cast high-temperature alloy and martensitic stainless steel |
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