CN102962592A - Electronic beam aided hot extrusion diffusion connection method for SiCp/Al composite material - Google Patents
Electronic beam aided hot extrusion diffusion connection method for SiCp/Al composite material Download PDFInfo
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- CN102962592A CN102962592A CN2012105435477A CN201210543547A CN102962592A CN 102962592 A CN102962592 A CN 102962592A CN 2012105435477 A CN2012105435477 A CN 2012105435477A CN 201210543547 A CN201210543547 A CN 201210543547A CN 102962592 A CN102962592 A CN 102962592A
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- 239000002131 composite material Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009792 diffusion process Methods 0.000 title claims abstract description 24
- 238000001192 hot extrusion Methods 0.000 title abstract 4
- 238000003466 welding Methods 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 47
- 238000010894 electron beam technology Methods 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 150000002739 metals Chemical class 0.000 claims description 34
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 239000007790 solid phase Substances 0.000 abstract description 2
- 239000010953 base metal Substances 0.000 abstract 3
- 230000004927 fusion Effects 0.000 abstract 1
- 238000009489 vacuum treatment Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 21
- 238000010586 diagram Methods 0.000 description 12
- 238000010406 interfacial reaction Methods 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- -1 aluminium) Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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Abstract
SiCp/Al复合材料电子束辅助热挤压扩散连接方法，本发明涉及SiCp/Al复合材料电子束辅助热源扩散焊接方法。本发明是要解决某些材料传统熔化焊接时产生的金属烧损严重、界面反应等问题，而提供了SiCp/Al复合材料电子束辅助热挤压扩散连接方法。一、对待焊接的两块母材进行预处理；二、将两块母材放入焊接夹具并施加压力挤压母材；三、抽真空处理；四、采用上散焦模式进行第一次焊接；五、进行第二次焊接；六、真空冷却即完成了SiCp/Al复合材料电子束辅助热挤压扩散连接方法。属于固相焊接领域。
The invention relates to a SiCp/Al composite material electron beam assisted hot extrusion diffusion bonding method, and the invention relates to a SiCp/Al composite material electron beam assisted heat source diffusion welding method. The invention aims to solve the problems of severe metal burning loss and interface reaction caused by traditional fusion welding of some materials, and provides a SiCp/Al composite material electron beam assisted hot extrusion diffusion connection method. 1. Pretreatment of the two base metals to be welded; 2. Put the two base metals into the welding fixture and apply pressure to squeeze the base metal; 3. Vacuum treatment; 4. Use the upper defocus mode for the first welding ; Five, the second welding; Six, vacuum cooling is completed SiCp/Al composite material electron beam assisted hot extrusion diffusion connection method. It belongs to the field of solid phase welding.
Description
Technical field
The present invention relates to SiCp/Al composite electron beam auxiliary thermal source diffusion welding method, belong to the Solid-phase welding field.
Background technology
The SiCp/Al composite is a kind of good structural material, have higher specific strength, specific stiffness and specific modulus, with and good stability of the dimension, antivibration, the many merits such as aging, have very important using value in fields such as Aeronautics and Astronautics, automobile, electronics.Contrast, the particle reinforcing material has the advantages such as with low cost, that preparation technology is simple, potential realization industrialized mass, thereby become the research emphasis of current aluminum matrix composite.If can successfully realize the connection between SiCp/Al composite and of the same race or foreign material (such as titanium, metals such as aluminium), will gather around in fields such as Aeronautics and Astronautics, automobile, electronics and have broad application prospects.
But because wild phase and the physical and chemical performance between the matrix of aluminum matrix composite are widely different, appearance of weld is relatively poor during melting welding, and at high temperature interfacial reaction occurs easily.Thereby the weldability problem that solves as early as possible aluminum matrix composite is to realize the key of its using value.The rational method that addresses this problem both at home and abroad at present there is not yet report.
Summary of the invention
The present invention is the problems such as the iron loss that produces in the time of will solving some material tradition molten solder is serious, interfacial reaction, and SiCp/Al composite electron beam auxiliary heat extruding diffusion connection method is provided.
SiCp/Al composite electron beam auxiliary heat extruding diffusion connection method is realized according to the following steps:
One, two SiCp/Al composite mother metals to be welded is carried out preliminary treatment;
Two, two SiCp/Al composite mother metals are put into weld jig, adjust the relative position of two SiCp/Al composite mother metals, apply 1～5MPa contact at contact-making surface; Wherein, the relative position of described two SiCp/Al composite mother metals is that the misalignment of the interface of two SiCp/Al composite mother metals is 0～0.2mm, and the slit 0～0.1mm between the interface;
Three, two SiCp/Al composite mother metals will fixing are put into vacuum chamber, and then being evacuated to vacuum is 5 * 10
-4Pa～5 * 10
-2Pa;
Four, then will weld electronic beam current and adopt the pattern that defocuses to get to the interface place of two SiCp/Al composite mother metals to add the circular scan welding, this be to weld for the first time; Wherein, described welding electronic beam current accelerating potential is 50～60kV, and focus current is 2000～2600mA, and the welding electronic beam current is 4mA～10mA, and speed of welding is 3mm/s～5mm/s;
Five, finish for the first time welding after, the electron beam reverses its direction is carried out second time and is welded; Wherein, welding electronic beam current accelerating potential was 50～60kV when welded the described second time, and focus current is 2000～2600mA, and electronic beam current is 4mA～10mA, and speed of welding is 3mm/s～5mm/s;
Six, welding final vacuum chamber cooling 8min～12min has namely finished SiCp/Al composite electron beam auxiliary heat extruding diffusion and has connected.
The invention effect:
It is very poor to adopt conventional electro-beam welding method that the SiCp/Al composite is carried out the welded seam shaping, and interfacial reaction is obvious, and strength of joint is lower.The present invention and normal welding method difference are to adopt fixedly mother metal of special weld jig, and the mother metal contact-making surface exerted pressure, utilize simultaneously the method for composite welding, as heat source the SiCp/Al composite is carried out electron beam auxiliary heat extruding diffusion with defocus(s)ed beam and connect.Can make SiCp/Al composite weld seam form good diffusion metallurgical binding on the one hand, the groove that joint does not have the aluminum substrate scaling loss to produce, appearance of weld is good; Can weaken or eliminate interfacial reaction on the other hand, obtain the seam organization of continuous distributed, avoid generation and the primary silicon of fragility phase to grow up, thereby joint tensile strength can have been improved.
Description of drawings
Fig. 1 is the structural representation of the weld jig in the test 1;
Fig. 2 is the weld jig shell schematic diagram in the test 1;
Fig. 3 is the vertical fixed bar schematic diagram in the weld jig of testing in 1;
Fig. 4 is backing plate at bottom schematic diagram in the weld jig of testing in 1;
Fig. 5 is slip front apron schematic diagram in the weld jig of testing in 1;
Fig. 6 is slip backboard schematic diagram in the weld jig of testing in 1;
Fig. 7 is that weld jig uses schematic diagram in the test 1;
Fig. 8 is the weldment macro morphology figure in the test 1;
Fig. 9 is the joint microscopic appearance figure in the test 1.
The specific embodiment
The specific embodiment one: the SiCp/Al composite electron beam auxiliary heat extruding diffusion connection method of present embodiment is realized according to the following steps:
One, two SiCp/Al composite mother metals to be welded is carried out preliminary treatment;
Two, two SiCp/Al composite mother metals are put into weld jig, adjust the relative position of two SiCp/Al composite mother metals, apply 1～5MPa contact at contact-making surface; Wherein, the relative position of described two SiCp/Al composite mother metals is that the misalignment of the interface of two SiCp/Al composite mother metals is 0～0.2mm, and the slit 0～0.1mm between the interface;
Three, two SiCp/Al composite mother metals will fixing are put into vacuum chamber, and then being evacuated to vacuum is 5 * 10
-4Pa～5 * 10
-2Pa;
Four, then will weld electronic beam current and adopt the pattern that defocuses to get to the interface place of two SiCp/Al composite mother metals to add the circular scan welding, this be to weld for the first time; Wherein, described welding electronic beam current accelerating potential is 50～60kV, and focus current is 2000～2600mA, and the welding electronic beam current is 4mA～10mA, and speed of welding is 3mm/s～5mm/s;
Five, finish for the first time welding after, the electron beam reverses its direction is carried out second time and is welded; Wherein, welding electronic beam current accelerating potential was 50～60kV when welded the described second time, and focus current is 2000～2600mA, and electronic beam current is 4mA～10mA, and speed of welding is 3mm/s～5mm/s;
Six, welding final vacuum chamber cooling 8min～12min has namely finished SiCp/Al composite electron beam auxiliary heat extruding diffusion and has connected.
The direction of the welding second time in the present embodiment is with welding direction is opposite for the first time, but track coincides with the track that welds for the first time;
Weld for the first time with step 5 with step 4 in the present embodiment and weld for the second time as one-period, can repeat 0～4 cycle, whenever finish one-period, electronic beam current just decreased with respect to a upper cycle, per cycle welding current size is respectively 8mA, 7mA, 6mA, 5mA, this is in order to weaken the impact of heat history effect, avoids the heat input excessive, and other technological parameters all remain unchanged;
Technological parameter and welding current change according to the mother metal change in size of welding in the present embodiment.
The present embodiment effect:
It is very poor to adopt conventional electro-beam welding method that the SiCp/Al composite is carried out the welded seam shaping, and interfacial reaction is obvious, and strength of joint is lower.Present embodiment and normal welding method difference are to adopt fixedly mother metal of special weld jig, and the mother metal contact-making surface exerted pressure, utilize simultaneously the method for composite welding, as heat source the SiCp/Al composite is carried out electron beam auxiliary heat extruding diffusion with defocus(s)ed beam and connect.Can make SiCp/Al composite weld seam form good diffusion metallurgical binding on the one hand, the groove that joint does not have the aluminum substrate scaling loss to produce, appearance of weld is good; Can weaken or eliminate interfacial reaction on the other hand, obtain the seam organization of continuous distributed, avoid generation and the primary silicon of fragility phase to grow up, thereby joint tensile strength can have been improved.
The specific embodiment two: what present embodiment and the specific embodiment one were different is: preprocess method is for carrying out mechanical grinding and Chemical cleaning to two SiCp/Al composite mother metal interfaces to be welded and near zone thereof in the step 1.Other step and parameter are identical with the specific embodiment one.
The specific embodiment three: what present embodiment was different from the specific embodiment one or two is: the composite of SiCp/Al described in step 1 mother metal is comprised of 2A12 aluminum substrate and SiC ceramic particle reinforced phase two parts, wherein the composition of 2Al2 aluminum substrate by weight mark be that Cu:4.4%, Mg:1.5%, Mn:0.6%, impurity≤0.15%, surplus are Al.Other step and parameter are identical with the specific embodiment one or two.
The specific embodiment four: what present embodiment was different from one of specific embodiment one to three is: the weld jig in the step 2 is by by by anchor clamps shell 1, clamp base 2, vertical fixture and horizontal fixture consist of, wherein said anchor clamps shell 1 is fixedly connected on the clamp base 2, be provided with sliding guide groove 1-1 on two relative sidewalls of anchor clamps shell 1, be provided with spacing hole 1-2 on the rear wall of anchor clamps shell 1, described vertical fixture is located at anchor clamps shell 1 interior forward end, vertical fixture is made of vertical fixed bar 3 and backing plate at bottom 4, described vertical fixed bar 3 two ends are fastened on anchor clamps shell 1 two side by holding screw 3-1, backing plate at bottom 4 is located under the vertical fixed bar 3, wherein, backing plate at bottom 4 is provided with the fixed strip 4-1 of two projections and relative with vertical fixed bar 3, described horizontal fixture is located at anchor clamps shell 1 inner rear end, horizontal fixture is by limited screw 5, slip front apron 6, slip backboard 7 and spring 8 consist of, wherein, the two ends of slip front apron 6 are provided with front apron projection 6-1, slip front apron 6 sides are provided with the first spring spacer pin 6-2, the two ends of slip backboard 7 are provided with backboard projection 7-1, slip backboard 7 sides are provided with the second spring spacer pin 7-2, the backboard projection 7-1 of the front apron projection 6-1 at slip front apron 6 two ends and slip backboard 7 embeds among the sliding guide groove 1-1, spring 8 is fixed between slip front apron 6 and the slip backboard 7 by the first spring spacer pin 6-2 and the second spring spacer pin 7-2, and limited screw 5 passes spacing hole 1-2 and leans on slip backboard 7.Other step and parameter are identical with one of specific embodiment one to three.
By following verification experimental verification beneficial effect of the present invention:
Test 1SiCp/Al composite electron beam auxiliary heat extruding diffusion connection method is realized according to the following steps:
One, two mother metals to be welded are carried out preliminary treatment:
Interface and the near zone thereof of two SiCp/Al composite mother metals to be welded are carried out mechanical grinding and Chemical cleaning;
Two, two SiCp/Al composite mother metals are put into weld jig, use two blocks of SiCp/Al composites of weld jig fixed press mother metal, using method is as follows:
A, two SiCp/Al composite mother metals are placed on respectively between the vertical fixed bar 3 of vertical fixture and the backing plate at bottom 4, adjust the relative position of two SiCp/Al composite mother metals, so that the misalignment of the interface of two SiCp/Al composite mother metals is less than 0.2mm, and the slit between the interface is less than 0.1mm, keep two SiCp/Al composite mother metals relative position in vertical direction constant by the vertical fixed bar 3 of vertical fixture and backing plate at bottom 4, then by regulating holding screw 3-1 vertical fixed bar two ends are locked at anchor clamps shell 1 both sides;
B, exert pressure by horizontal fixture limited screw 5, slip front apron 6, slip backboard 7 and spring 8 and to carry out level extruding; At first, adjust slip front apron 6 and slip backboard 7 relative distances by sliding guide groove 1-1 and compress spring 8 between slip front apron 6 and the slip backboard 7, then by limited screw 5 fixed positions, when spring 8 compression reaches fixedly amount of contraction, just can get this moment spring to mother metal contact-making surface applied pressure, utilize this pressure and known contact-making surface area, just the pressure size that produces on the contact-making surface as can be known, adopting the pattern that defocuses to get to the interface place of two SiCp/Al composite mother metals the welding electronic beam current welds, add simultaneously circular scan, adjust each technological parameter, under the force value of setting, carry out soldering test;
Wherein, described spring natural length L=66mm, maximum collapse amount Δ L=36mm, coefficient of elasticity K=12.7N/mm, available maximum elastic force F=457.2N, these anchor clamps adopt the spring of two same sizes, so the maximum pressure that Fmax=2F=914.4N can be provided, the maximum pressure that namely can the butt welding fitting applies is
Wherein L, W, H are respectively the length of weldment, and size range is respectively: length L is 0～280mm, and width W is 10mm～50mm, and thickness H is 0～20mm; For the weldment that is of a size of 2mm * 20mm * 70mm, the available Maximum Contact face of these anchor clamps pressure is maximum pressure
Adjust the relative position of two SiCp/Al composite mother metals, so that the misalignment of the interface of two SiCp/Al composite mother metals is less than 0.2mm, and the slit between the interface is less than 0.1mm, then fix two SiCp/Al composite mother metals by weld jig, apply fixing contact 3MPa at two SiCp/Al composite mother metal contact-making surfaces simultaneously;
Three, above the spring place of weld jig, add a cover a stainless steel baffle plate, eliminate whereby because of the ferromagnetism of the spring bias effect to electronic beam current, put into vacuum chamber with fixing two and begin to vacuumize, make vacuum in this vacuum chamber at 5 * 10-4Pa;
Four, will weld electronic beam current and adopt the pattern that defocuses to get to the interface place of two SiCp/Al composite mother metals to weld, add simultaneously circular scan, accelerating potential is 55kV, focus current is 2480mA, electronic beam current is 7mA, and speed of welding is 15mm/s, and this is the welding process first time;
Five, and then carry out second time welding, the direction of welding is opposite with previous step for the second time, but the track that track and step 5 are welded coincides, and accelerating potential is 55kV during welding, and focus current is 2480mA, and electronic beam current is 7mA, and speed of welding is 15mm/s;
Six, with step 4 and step 5 as one-period, back cycle repeating step four and step 5, every next cycle, electronic beam current can decrease than a upper cycle, can weaken like this impact of heat history effect, avoided the heat input excessive; Other technological parameters all remain unchanged;
Seven, vacuum chamber cooling, cooling 10min, welding is finished.
This test SiCp/Al composite mother metal is of a size of 70mm*20mm*2mm and 70mm*20mm*3mm, also can be other sizes, as long as all can in giving size range.
Fig. 1 is the structural representation of the weld jig in the test 1;
Fig. 2 is the weld jig shell schematic diagram in the test 1;
Fig. 3 is the vertical fixed bar schematic diagram in the weld jig of testing in 1;
Fig. 4 is backing plate at bottom schematic diagram in the weld jig of testing in 1;
Fig. 5 is slip front apron schematic diagram in the weld jig of testing in 1;
Fig. 6 is slip backboard schematic diagram in the weld jig of testing in 1;
Fig. 7 is that weld jig uses schematic diagram in the test 1, and wherein, 9 is copper alloy and aluminum matrix composite;
Fig. 8 is the weldment macro morphology figure in the test 1;
Fig. 9 is the joint microscopic appearance figure in the test 1.
As shown in Figure 8, macroscopic view: the weldment junction, it is fine to be shaped, and Al splashes without matrix, and face bonding is sewed with the tiling of minute quantity residue, incident welding depression serious problems when having solved melting welding.
As shown in Figure 9, microcosmic: the commissure, the aluminum substrate that comprises in the composite of both sides is metallurgical to be connected better, and aluminum substrate is subjected to thermal diffusion to make weld seam up, the whole pore-free of joint, defects i.e.cracks, the fragility phase Al that interfacial reaction generates during also without melting welding
4C
3, improved joint performance.
Claims (4)
1.SiCp/Al composite electron beam auxiliary heat extruding diffusion connection method is characterized in that SiCp/Al composite electron beam auxiliary heat pushes diffusion connection method and realizes according to the following steps:
One, two SiCp/Al composite mother metals to be welded is carried out preliminary treatment;
Two, two SiCp/Al composite mother metals are put into weld jig, adjust the relative position of two SiCp/Al composite mother metals, apply 1～5MPa contact at contact-making surface; Wherein, the relative position of described two SiCp/Al composite mother metals is that the misalignment of the interface of two SiCp/Al composite mother metals is 0～0.2mm, and the slit 0～0.1mm between the interface;
Three, two SiCp/Al composite mother metals will fixing are put into vacuum chamber, and then being evacuated to vacuum is 5 * 10
-4Pa～5 * 10
-2Pa;
Four, then will weld electronic beam current and adopt the pattern that defocuses to get to the interface place of two SiCp/Al composite mother metals to add the circular scan welding, this be to weld for the first time; Wherein, described welding electronic beam current accelerating potential is 50～60kV, and focus current is 2000～2600mA, and the welding electronic beam current is 4mA～10mA, and speed of welding is 3mm/s～5mm/s;
Five, finish for the first time welding after, the electron beam reverses its direction is carried out second time and is welded; Wherein, welding electronic beam current accelerating potential was 50～60kV when welded the described second time, and focus current is 2000～2600mA, and electronic beam current is 4mA～10mA, and speed of welding is 3mm/s～5mm/s;
Six, welding final vacuum chamber cooling 8min～12min has namely finished SiCp/Al composite electron beam auxiliary heat extruding diffusion and has connected.
2. SiCp/Al composite electron beam auxiliary heat according to claim 1 extruding diffusion connection method is characterized in that preprocess method in the step 1 is for carrying out mechanical grinding and Chemical cleaning to two SiCp/Al composite mother metal interfaces to be welded and near zone thereof.
3. SiCp/Al composite electron beam auxiliary heat according to claim 1 pushes diffusion connection method, it is characterized in that the composite of SiCp/Al described in the step 1 is comprised of 2A12 aluminum substrate and SiC ceramic particle reinforced phase two parts, wherein the composition of 2A12 aluminum substrate by weight mark be that Cu:4.4%, Mg:1.5%, Mn:0.6%, impurity≤0.15%, surplus are Al.
4. SiCp/Al composite electron beam auxiliary heat according to claim 1 pushes diffusion connection method, it is characterized in that weld jig described in the step 2 is by anchor clamps shell (1), clamp base (2), vertical fixture and horizontal fixture consist of, wherein said anchor clamps shell (1) is fixedly connected on the clamp base (2), be provided with sliding guide groove (1-1) on two relative sidewalls of anchor clamps shell (1), be provided with spacing hole (1-2) on the rear wall of anchor clamps shell (1), described vertical fixture is located at anchor clamps shell (1) interior forward end, vertical fixture is made of vertical fixed bar (3) and backing plate at bottom (4), described vertical fixed bar (3) two ends are fastened on anchor clamps shell (1) two side by holding screw (3-1), backing plate at bottom (4) is located under the vertical fixed bar (3), wherein, backing plate at bottom (4) is provided with the fixed strip (4-1) of two projections and relative with vertical fixed bar (3), described horizontal fixture is located at the inner rear end of anchor clamps shell (1), horizontal fixture is by limited screw (5), slip front apron (6), slip backboard (7) and spring (8) consist of, wherein, the two ends of slip front apron (6) are provided with front apron projection (6-1), slip front apron (6) side is provided with spring spacer pin (6-2), the two ends of slip backboard (7) are provided with backboard projection (7-1), slip backboard (7) side is provided with spring spacer pin (7-2), the front apron projection (6-1) at slip front apron (6) two ends all embeds in the sliding guide groove (1-1) with the backboard projection (7-1) of slip backboard (7), spring (8) is located between slip front apron (6) and the slip backboard (7) by spring spacer pin (6-2) and spring spacer pin (7-2), and limited screw (5) passes spacing hole (1-2) and leans on slip backboard (7).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103273205A (en) * | 2013-04-24 | 2013-09-04 | 哈尔滨工业大学 | Method for electron beam composite instant liquid phase diffusion bonding of GH4169 high-temperature alloy |
| CN103978277A (en) * | 2014-06-06 | 2014-08-13 | 哈尔滨工业大学 | A Method of Diffusion Brazing SiCp/Al Composite Material Using Al/Cu/Al Composite Foil |
| CN107755911A (en) * | 2017-09-11 | 2018-03-06 | 中国科学院合肥物质科学研究院 | A kind of method for oxide dispersion intensifying steel Solid-phase welding |
| CN108015421A (en) * | 2017-12-04 | 2018-05-11 | 上海思客琦自动化工程有限公司 | A kind of welding procedure of electrical switchgear aluminium alloy box |
| WO2018205538A1 (en) * | 2017-05-09 | 2018-11-15 | 华南理工大学 | High volume fraction sicp/al and bismuthate glass composite material and preparation method therefor |
| CN110142497A (en) * | 2019-06-05 | 2019-08-20 | 哈尔滨工业大学 | A method of inhibiting the melting of the base metal of focused electron beam welding on aluminum matrix composites |
| CN110142494A (en) * | 2019-06-05 | 2019-08-20 | 哈尔滨工业大学 | A non-contact electron beam welding method for aluminum-lithium alloy |
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| CN103273205A (en) * | 2013-04-24 | 2013-09-04 | 哈尔滨工业大学 | Method for electron beam composite instant liquid phase diffusion bonding of GH4169 high-temperature alloy |
| CN103273205B (en) * | 2013-04-24 | 2015-08-19 | 哈尔滨工业大学 | A kind of method of electron beam compound transient liquid phase bonding GH4169 high temperature alloy |
| CN103978277A (en) * | 2014-06-06 | 2014-08-13 | 哈尔滨工业大学 | A Method of Diffusion Brazing SiCp/Al Composite Material Using Al/Cu/Al Composite Foil |
| WO2018205538A1 (en) * | 2017-05-09 | 2018-11-15 | 华南理工大学 | High volume fraction sicp/al and bismuthate glass composite material and preparation method therefor |
| CN107755911A (en) * | 2017-09-11 | 2018-03-06 | 中国科学院合肥物质科学研究院 | A kind of method for oxide dispersion intensifying steel Solid-phase welding |
| CN108015421A (en) * | 2017-12-04 | 2018-05-11 | 上海思客琦自动化工程有限公司 | A kind of welding procedure of electrical switchgear aluminium alloy box |
| CN110142497A (en) * | 2019-06-05 | 2019-08-20 | 哈尔滨工业大学 | A method of inhibiting the melting of the base metal of focused electron beam welding on aluminum matrix composites |
| CN110142494A (en) * | 2019-06-05 | 2019-08-20 | 哈尔滨工业大学 | A non-contact electron beam welding method for aluminum-lithium alloy |
| CN110142494B (en) * | 2019-06-05 | 2020-11-06 | 哈尔滨工业大学 | Aluminum-lithium alloy non-contact electron beam welding method |
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