CN204620730U - A kind of heat processing magnesium alloy weld joint rolls deformation apparatus - Google Patents
A kind of heat processing magnesium alloy weld joint rolls deformation apparatus Download PDFInfo
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- CN204620730U CN204620730U CN201520307030.7U CN201520307030U CN204620730U CN 204620730 U CN204620730 U CN 204620730U CN 201520307030 U CN201520307030 U CN 201520307030U CN 204620730 U CN204620730 U CN 204620730U
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Abstract
The utility model discloses a kind of heat processing magnesium alloy weld joint and roll deformation apparatus, comprise and distributing according to the order of sequence and the heat insulation and heating equipment, main roller group and the secondary roller group that supply the magnesium alloy weld joint welded to pass through successively; Heat insulation and heating equipment is used for the magnesium alloy weld joint that connects of butt welding and heats, and main roller group and secondary roller group are used for being driven plain after at least twice rolls successively to weld seam flushing with mother metal the magnesium alloy weld joint heated pressurize successively, the make weld reinforcement of magnesium alloy weld joint.Adopt heat to roll deformation method to improve the defect of magnesium alloy weld joint, improve strength of joint and toughness, tensile strength can reach 225MPa, improves 36% than the welding point not adopting heat to roll distortion; And refinement seam organization, make that weld edge glacing flatness increases, width is more even, weld shape bright and clean round and smooth, seamlessly transit with mother metal, elimination welding point stress concentration phenomenon, weakens or eliminates the defect such as pore, slag inclusion.
Description
Technical field
The utility model relates to a kind of heat and rolls deformation apparatus, particularly relates to a kind of heat processing magnesium alloy weld joint and rolls deformation apparatus, belong to magnesium alloy welding technology field.
Background technology
Welding is the key technology of processing that magnesium-alloy material manufactures, but magnesium alloy welding performance is bad, is difficult to realize reliable connection.Magnesium alloy structural part and the connection between magnesium alloy and other material structure part for this reason, becomes one of the technical bottleneck and key technology urgently to be resolved hurrily of the application of restriction magnesium alloy.
The reliability of magnesium alloy weld joint has become the pressing issues of its application, current magnesium alloy is being applied to the manufacture of numerous load-carrying construction part, as magnesium alloy frame of handwheel, dynamical system automatic gear-box, the oil end, magnesium alloy pipe automobile chassis etc. in auto manufacturing.Strength of welded joint, the problem such as plasticity and fatigue behaviour of these load-carrying construction parts are the most basic of product safety reliability and most important evaluation index.
Data shows, in the inefficacy of magnesium alloy welding structure, many accidents are because the fracture of welding point causes.In practical engineering application, many Welding Structures are all be on active service under the dynamic loading of alternation, now iff static load tensile strength or the yield strength of considering welding point, so Welding Structure is easy to just failure fracture occur during normal service, cause larger engineering accident, so the fatigue strength performance of welding point under alternate load must be taken into full account when structural design, and for magnesium alloy welding structure, fatigue fracture is also a kind of principal mode that it lost efficacy, the Welding Structure failure fracture accident caused by fatigue crack accounts for more than 80% of total fracture accident.
Magnesium alloy welding structure can be subject to the effect of various vibration, pulsating load or alternate load in engineer applied, the threat of these load to its security used and working life is very big, fatigue crack forming core and the micro-crack extension of structure can be caused, particularly magnesium alloy joint made by flame welding.Due to the feature of technique for welding itself and the physical and chemical performance of magnesium alloy self, magnesium alloy weld joint is caused to there is following shortcoming:
1. the discontinuity of joints, certainly will cause the intersection of reinforcement and mother metal to have stress concentration phenomenon;
2. the discontinuity of joint microstructure, the heat affected area grain structure of magnesium alloy joint is thicker than organizing of weld seam and mother metal, the uneven microstructure of whole joint, discontinuous;
3. due to the shrinkage of weld metal, can residual stress be produced near joints, reduce the mechanical property of joint;
4. joint has weld defect, because the chemical property of magnesium alloy is active, inevitably has the weld defect such as pore, slag inclusion and occur in welding process;
5. joint appearance out-of-flatness, unsightly.
At present, existing research have employed different welding methods and means are eliminated or weaken the above-mentioned shortcoming of magnesium alloy weld joint, but these methods are very limited to the resolution ability of the problems referred to above.Because magnesium alloy has the characteristic such as high thermal conductivity, the large coefficient of expansion, lower fusing point and boiling point, make easily to produce overheated structure and coarse grains in magnesium alloy weld seam Ji Jinfeng district, this coarse grain directly can affect the mechanical property of joint; And magnesium can also form fragility nitride by strong chemical combination with the nitrogen in air, significantly can reduce the mechanical property of joint.
So in Welding Technology of Magnesium Alloy, solving its welding point obdurability, is the necessary condition guaranteeing that magnesium alloy welding structure is applied.
Utility model content
Main purpose of the present utility model is, overcomes deficiency of the prior art, provides a kind of heat processing magnesium alloy weld joint to roll deformation apparatus, is specially adapted to magnesium alloy welding technology field.
The heat of the process magnesium alloy weld joint that technical problem to be solved in the utility model is to provide that structure is simple, compact in design, easy accessibility, making are easy, safe and reliable, practical rolls deformation apparatus, heat is adopted to roll deformation method to improve the defect of magnesium alloy weld joint, joint is flattened, not only eliminate discontinuity and the stress concentration phenomenon of profile, reach joint microstructure more even; And adopt hot pressing that the weld metal of contraction can be made to obtain to extend, can be correcting deformed and regulate the distribution of internal stress, the effect of postwelding local heat treatmet can be played, thus eliminate portion of residual stress; Can weaken or eliminate the defect such as pore, slag inclusion simultaneously, realize flat appearance attractive in appearance, have the value in industry.
In order to achieve the above object, the technical scheme that the utility model adopts is:
The heat processing magnesium alloy weld joint rolls a deformation apparatus, comprises and distributing according to the order of sequence and the heat insulation and heating equipment, main roller group and the secondary roller group that supply the magnesium alloy weld joint welded to pass through successively; Described heat insulation and heating equipment is used for the magnesium alloy weld joint that connects of butt welding and heats, and described main roller group and secondary roller group are used for being driven plain after at least twice rolls successively to weld seam flushing with mother metal the magnesium alloy weld joint heated pressurize successively, the make weld reinforcement of magnesium alloy weld joint.
The utility model is set to further: described heat insulation and heating equipment comprises by the fixing upper heater of support and lower heater, and is between heater and lower heater for the heat tunnel that the magnesium alloy weld joint welded passes through; Described main roller group comprises main roller, lower main roller and is in the master that the magnesium alloy weld joint that Gong heats between main roller and lower main roller passes through rolls passage; Described secondary roller group comprises secondary roller, lower secondary roller and is between secondary roller and lower secondary roller rolls the pair that magnesium alloy weld joint that passage rolled passes through roll passage for through main.
Wherein, the width of described heat tunnel is 3 ~ 6 times of magnesium alloy weld joint weld width; Described master rolls 1.5 ~ 3 times that passage and the secondary width rolling passage are magnesium alloy weld joint weld width.
The utility model is set to further: it is 2 right that described main roller group and secondary roller group are, and the weld reinforcement of magnesium alloy weld joint is driven plain successively after four times are rolled.
The utility model is set to further: also comprise the pressing mechanism pressed to main roller group and secondary roller group.
The utility model is set to further: described upper heater and lower heater are ceramic heating plate.
The utility model is set to further: described support is adjustable support, for regulating the height of heat tunnel.
The utility model also provides a kind of heat processing magnesium alloy weld joint to roll the process of deformation apparatus, comprises the following steps successively:
1) welding implemented to mother metal magnesium alloy sheet and be prepared into magnesium alloy weld joint;
2) heated by heat insulation and heating equipment by the magnesium alloy weld joint welded, heating-up temperature is 300 DEG C ~ 450 DEG C;
3) magnesium alloy weld joint heated is carried out pressurization by main roller group and secondary roller group successively to roll, and flatten and flush with mother metal to weld seam, wherein the pressure parameter of main roller group and secondary roller group is 150MPa ~ 350MPa, hot pressing speed is 3 ~ 6mm/s.
Further, described step 1) adopt the argon arc welding of tungsten level to implement welding, weldingvoltage 24V, welding current 160A, speed of welding 2.0mm/s, silk filling diameter 3mm, electric arc height 4mm, argon flow amount 16L/min, purity of argon 99.99%.
Further, described step 1) mother metal magnesium alloy adopt the AZ31 magnesium alloy plate that 3mm is thick, 2mm reinforcement is respectively stayed in weld seam both sides.
Further, described step 3) main roller group and the pressure parameter of secondary roller group be respectively 220MPa and 180MPa.
Compared with prior art, the beneficial effect that the utility model has is:
The setting of deformation apparatus is rolled by heat, the magnesium alloy weld joint adopting heat to roll deformation method acquisition is obviously better than other thinning microstructure method existing at intensity, plasticity and then joint fatigue aspect of performance, make magnesium alloy weld joint intensity can realize waiting strong ties, plasticity index to be equal to or higher than base metals, there is sufficient plasticity storage and then fatigue life of joint can be increased substantially.And heat of the present utility model rolls deformation apparatus and process thereof, be not only applicable to the improvement of joint made by flame welding mechanical property, but also extend to the follow-up Strengthening and Toughening process of the multiple hot pressing jointings such as friction welding (FW), diffusion welding (DW), soldering.
1, magnesium alloy weld joint is flattened, discontinuity and the stress concentration phenomenon of profile can be eliminated; Pressing of the present utility model has the difference of essence with removing reinforcement by polishing, a part of weld metal is removed in polishing, thus reduces the intensity of weld seam, and flattening is then under the prerequisite not reducing weld metal, makes reinforcement to mother metal gentle transition.
2, joint microstructure is more even, and hot pressing is the deforming technique carried out at a certain temperature, not only improves seam organization, also can improve heat affected area tissue.
3, adopt hot pressing that the weld metal of contraction can be made to obtain to extend, can be correcting deformed and regulate the distribution of internal stress, the effect of postwelding local heat treatmet can be played simultaneously, thus eliminate portion of residual stress.
4, hot pressing deforming can weaken or eliminate the defect such as pore, slag inclusion, and makes magnesium alloy weld joint flat appearance attractive in appearance.
Foregoing is only the general introduction of technical solutions of the utility model, and in order to clearer understanding technological means of the present utility model, below in conjunction with accompanying drawing, the utility model will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of heat processing magnesium alloy weld joint of the utility model rolls deformation apparatus;
Fig. 2 is for rolling the weld seam metallographic structure micrograph of magnesium alloy weld joint of sample (a) after deformation, (b), (c) and (d) through heat;
Fig. 3 is for roll the magnesium alloy weld joint of sample (a) after deformation and the tension test data of mother metal and as-welded joint through heat.
Detailed description of the invention
Below in conjunction with Figure of description, the utility model is further described.
A kind of heat processing magnesium alloy weld joint as shown in Figure 1 rolls deformation apparatus, comprises and distributing according to the order of sequence and the heat insulation and heating equipment 1, main roller group 2 and the secondary roller group 3 that supply the magnesium alloy weld joint 10 welded to pass through successively; The magnesium alloy weld joint 10 that described heat insulation and heating equipment 1 connects for butt welding heats, and described main roller group 2 and secondary roller group 3 are driven plain successively to weld seam 4 for weld seam 4 reinforcement 40 of the magnesium alloy weld joint 10 that pressurizes successively to the magnesium alloy weld joint 10 heated, makes and flush with mother metal after twice is rolled.
Described heat insulation and heating equipment 1 comprises by the fixing upper heater 11 of support (not shown) and lower heater 12, and is between heater 11 and lower heater 12 for the heat tunnel 13 that the magnesium alloy weld joint 10 welded passes through; The width of described heat tunnel 13 is 3 ~ 6 times of magnesium alloy weld joint 10 weld seam 4 width.Described upper heater 11 and lower heater 12 are ceramic heating plate; Described support can be set to adjustable support, for regulating the height of heat tunnel 13.
Described main roller group 2 comprises main roller 21, lower main roller 22 and is in the master that the magnesium alloy weld joint 10 that Gong heats between main roller 21 and lower main roller 22 passes through rolls passage; Described secondary roller group 3 comprises secondary roller 31, lower secondary roller 32 and is between secondary roller 31 and lower secondary roller 32 rolls the pair that magnesium alloy weld joint 10 that passage rolled passes through roll passage for through main; Described master rolls 1.5 ~ 3 times that passage and the secondary width rolling passage are magnesium alloy weld joint 10 weld seam 4 width.Described main roller group 2 and secondary roller group 3 are carried out pressurization by the pressing mechanism (not shown) that presses successively to magnesium alloy weld joint 10 and are realized heat and roll.
A kind of heat processing magnesium alloy weld joint as shown in Figure 1 rolls deformation apparatus and carries out implementing the hot process rolled, and comprises the following steps successively:
1) welding implemented to mother metal magnesium alloy sheet and be prepared into magnesium alloy weld joint; The argon arc welding of tungsten level is adopted to implement welding, weldingvoltage 24V, welding current 160A, speed of welding 2.0mm/s, silk filling diameter 3mm, electric arc height 4mm, argon flow amount 16L/min, purity of argon 99.99%.
2) heated by heat insulation and heating equipment by the magnesium alloy weld joint welded, heating-up temperature is 300 DEG C ~ 450 DEG C;
3) magnesium alloy weld joint heated is carried out pressurization by main roller group and secondary roller group successively to roll, and flatten and flush with mother metal to weld seam, wherein the pressure parameter of main roller group and secondary roller group is 150MPa ~ 350MPa, hot pressing speed is 3 ~ 6mm/s.
Below that mother metal magnesium alloy sheet adopts the thick AZ31 magnesium alloy plate of 3mm ~ 4.5mm, weld seam both sides respectively stay 2mm reinforcement to carry out process specific embodiment that heat rolls illustrates:
Embodiment 1:
(1) raw-materially to select
Adopt Mg-Al system AZ31 magnesium alloy plate as test mother metal, test plate (panel) is of a size of 200mm × 60mm × 3.0mm, and the AZ31 magnesium alloy solder wire with mother metal homogeneity selected by welding material, and specification is φ 3.0mm.The main chemical compositions of magnesium alloy mother metal and mechanical property are in table 1 and table 2.
The chemical composition (wt.%) of table 1:AZ31 magnesium alloy
The mechanical property of table 2:AZ31 magnesium alloy
(2) Welding Method & Equipment are chosen
1 secondary butt welding test plate (panel) is formed with the 2 blocks of sheet materials being of a size of 200mm × 60mm × 3.0mm.Test piece for welding opens the double V-groove of 60 °, and root gap controls at 3 ~ 4mm.Remove the greasy dirt on test plate (panel) surface with acetone, by within welding region 20-30mm with sand papering to exposing metallic luster, groove face removes oxide-film through scraping, ensures that the region to be welded before welding starts does not have pollutant.Adopt the argon arc welding of tungsten level to implement welding, tungsten electrode end grinder buffing becomes hemispherical, weldingvoltage 24V, welding current 160A, speed of welding 2.0mm/s, silk filling diameter 3mm, electric arc height 4mm, argon flow amount 16L/min, purity of argon 99.99%; Front welding 2 layers during welding, back side welding 1 layer, forms the double welded joint that 2mm reinforcement is respectively stayed in weld seam both sides.
(3) hot rolling device is used
The magnesium alloy weld joint welded is heated by heat insulation and heating equipment, heating-up temperature T=350 DEG C; Again the magnesium alloy weld joint heated is carried out pressurization by main roller group and secondary roller group successively to roll, wherein the pressure parameter of main roller group and secondary roller group is respectively 220MPa and 180MPa, hot pressing speed is 5mm/s.
(4) heat rolls result
In Fig. 2, (a) is the sample prepared successively by the said equipment, and as seen from the figure, weld metal zone dendritic crystalline cast sturcture is eliminated, and crystal grain presents tiny spherical, and seam organization obtains obvious refinement, and crystallite dimension is 10 μm ~ 20 μm.Hot pressing deforming has broken β-Mg
17al
12in the state of crystal boundary continuous distributed, be evenly distributed in intracrystalline, inhibit growing up again of weld grain after solid solution again with the form of dispersoid particle, the content of β phase is fewer than as-welded joint welding district simultaneously, mainly due to the reduction of Al content.Heat rolls in deformation process, and find dynamic recrystallization phenomenon, subgrain appears in weld metal zone, and the clear-cut of subgrain, dislocation is evenly distributed.
Fig. 3 is mother metal, as-welded joint rolls the tension test data of joint with heat.According to result of the test, the tensile strength of thermocompression head can reach 225MPa, and the tensile strength measured result of no-welding-seam mother metal AZ31 magnesium alloy is 240MPa, and illustrate that welding point is after hot-pressing processing, tensile strength has reached 94% of base metals.And the tensile strength of as-welded joint is usually at 165MPa, only have 60% ~ 75% of base metals tensile strength.Therefore can think that the strength of joint of postwelding hot-pressing processing is close to the strength level of base metals, hot-pressing processing Welded Joints intensity tool improves significantly.From the percentage elongation of tension test, the percentage elongation of as-welded joint is between 6% ~ 8%, and thermocompression head percentage elongation is usually between 9% ~ 11%, although also have some gaps compared with 18% ~ 22% of base metals, the improvement result of hot pressing Welded Joints plasticity is obvious.Consider that in process of the test, weld reinforcement controls lower, thus welding point dynamic compression amount of plastic deformation is also corresponding less, and plastics modification effect does not also fully show; And this problem is by increasing the weld reinforcement on positive and negative two sides to increase compressive plastic deformation amount during welding.
The above-mentioned fact shows, the various mechanical performance indexs that AZ31 magnesium alloy TIG welding heat rolls joint are all better than as-welded joint, the high temperature dynamic plasticity distortion of hot pressing promotes disperse educt and the diffusion of welding point supersaturation alloying element homogenising of the inner hardening constituent of nonequilibrium freezing welding joint structure, the intensity of magnesium alloy weld joint and plasticity is made all to be better than as-welded joint, close to mother metal performance.
Embodiment 2:
Adopt the materials and methods identical with embodiment 1, test plate (panel) is of a size of 200mm × 60mm × 3.5mm, and technological parameter is: heating-up temperature T=300 DEG C, and the pressure parameter of main roller group and secondary roller group is respectively 350MPa and 150MPa, hot pressing speed is 3mm/s.
If (b) in Fig. 2 is after 300 DEG C of distortion, starts to occur obvious twinning, the crystal boundary of some original grain has occurred very tiny dynamic recrystallization crystal grain.Now can see that these crystal grain are obviously elongated, show that dynamic recrystallization has started to occur.The mechanical properties of sample (b) and plastic strain reach 176MPa and 7.8% respectively.
Embodiment 3:
Adopt the materials and methods identical with embodiment 1, test plate (panel) is of a size of 200mm × 60mm × 4.0mm, and technological parameter is: heating-up temperature T=400 DEG C, and the pressure parameter of main roller group and secondary roller group is respectively 150MPa and 350MPa, hot pressing speed is 6mm/s.
If (c) in Fig. 2 is after 400 DEG C of distortion, occurred obvious twinning, but also there is crystal grain combines the phenomenon with grain growth again, dynamic recrystallization and grain growth are also deposited.The mechanical properties of sample (c) and plastic strain reach 180.8MPa and 8.3% respectively.
Embodiment 4:
Adopt the materials and methods identical with embodiment 1, test plate (panel) is of a size of 200mm × 60mm × 4.5mm, and technological parameter is: heating-up temperature T=450 DEG C, and the pressure parameter of main roller group and secondary roller group is respectively 350MPa and 180MPa, hot pressing speed is 6mm/s.
If (d) in Fig. 2 is after 450 DEG C of distortion, recrystal grain increases, and much adjacent crystal grain occurs to merge phenomenon.The mechanical properties of sample (d) and plastic strain reach 210MPa and 8.1% respectively.
Innovative point of the present utility model is, there is provided that structure is simple, the heat of process magnesium alloy weld joint that compact in design, easy accessibility, making are easy, safe and reliable, practical rolls deformation apparatus, heat is adopted to roll deformation method to improve the defect of magnesium alloy weld joint, improve strength of joint and toughness, tensile strength can reach 225MPa, improves 36% (as-welded joint 165MPa) than the welding point not adopting heat to roll distortion; And refinement seam organization, make that weld edge glacing flatness increases, width is more even, weld shape bright and clean round and smooth, seamlessly transit with mother metal, elimination welding point stress concentration phenomenon, weakens or eliminates the defect such as pore, slag inclusion.
More than show and describe general principle of the present utility model, principal character and advantage.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. the heat processing magnesium alloy weld joint rolls a deformation apparatus, it is characterized in that: comprise and distributing according to the order of sequence and the heat insulation and heating equipment, main roller group and the secondary roller group that supply the magnesium alloy weld joint welded to pass through successively; Described heat insulation and heating equipment is used for the magnesium alloy weld joint that connects of butt welding and heats, and described main roller group and secondary roller group are used for being driven plain after at least twice rolls successively to weld seam flushing with mother metal the magnesium alloy weld joint heated pressurize successively, the make weld reinforcement of magnesium alloy weld joint.
2. a kind of heat processing magnesium alloy weld joint according to claim 1 rolls deformation apparatus, it is characterized in that: described heat insulation and heating equipment comprises by the fixing upper heater of support and lower heater, and be between heater and lower heater for the heat tunnel that the magnesium alloy weld joint welded passes through;
Described main roller group comprises main roller, lower main roller and is in the master that the magnesium alloy weld joint that Gong heats between main roller and lower main roller passes through rolls passage;
Described secondary roller group comprises secondary roller, lower secondary roller and is between secondary roller and lower secondary roller rolls the pair that magnesium alloy weld joint that passage rolled passes through roll passage for through main;
The width of described heat tunnel is 3 ~ 6 times of magnesium alloy weld joint weld width; Described master rolls 1.5 ~ 3 times that passage and the secondary width rolling passage are magnesium alloy weld joint weld width.
3. a kind of heat processing magnesium alloy weld joint according to claim 1 rolls deformation apparatus, it is characterized in that: it is 2 right that described main roller group and secondary roller group are, and the weld reinforcement of magnesium alloy weld joint is driven plain successively after four times are rolled.
4. a kind of heat processing magnesium alloy weld joint according to claim 1 rolls deformation apparatus, it is characterized in that: also comprise the pressing mechanism pressed to main roller group and secondary roller group.
5. a kind of heat processing magnesium alloy weld joint according to claim 2 rolls deformation apparatus, it is characterized in that: described upper heater and lower heater are ceramic heating plate.
6. a kind of heat processing magnesium alloy weld joint according to claim 2 rolls deformation apparatus, it is characterized in that: described support is adjustable support, for regulating the height of heat tunnel.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826894A (en) * | 2015-05-13 | 2015-08-12 | 南京工程学院 | Thermal rolling deformation device for processing magnesium alloy welding joint and technological method for thermal rolling deformation device |
| CN112404174A (en) * | 2020-10-30 | 2021-02-26 | 武汉巨迪金属管业有限公司 | Rolling and roundness correcting integrated machine |
| CN113400010A (en) * | 2021-05-25 | 2021-09-17 | 江苏新恒基特种装备股份有限公司 | Argon arc welds build-up welding and rolls extrusion integrated vibration material disk device after welding |
| CN113681187A (en) * | 2021-08-26 | 2021-11-23 | 南京工程学院 | Austenite high-manganese steel dissimilar metal welding device and method based on thermal coupling effect |
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2015
- 2015-05-13 CN CN201520307030.7U patent/CN204620730U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826894A (en) * | 2015-05-13 | 2015-08-12 | 南京工程学院 | Thermal rolling deformation device for processing magnesium alloy welding joint and technological method for thermal rolling deformation device |
| CN104826894B (en) * | 2015-05-13 | 2017-06-20 | 南京工程学院 | A kind of heat for processing magnesium alloy weld joint rolls deformation apparatus and its process |
| CN112404174A (en) * | 2020-10-30 | 2021-02-26 | 武汉巨迪金属管业有限公司 | Rolling and roundness correcting integrated machine |
| CN113400010A (en) * | 2021-05-25 | 2021-09-17 | 江苏新恒基特种装备股份有限公司 | Argon arc welds build-up welding and rolls extrusion integrated vibration material disk device after welding |
| CN113681187A (en) * | 2021-08-26 | 2021-11-23 | 南京工程学院 | Austenite high-manganese steel dissimilar metal welding device and method based on thermal coupling effect |
| CN113681187B (en) * | 2021-08-26 | 2023-02-03 | 南京工程学院 | Austenite high-manganese steel dissimilar metal welding device and method based on thermal coupling effect |
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