CN110405413B - Vacuum seal welding method for multilayer plate blank - Google Patents
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Abstract
The invention belongs toThe technical field of sealing welding, in particular to a vacuum sealing welding method for multilayer slabs. A vacuum seal welding method for a multilayer slab comprises the following steps: 1) stress relief heat treatment of the plate blank; 2) sawing the heat-treated plate blank into small pieces; 3) milling the sawed blank to remove the surface defects of the blank and enable the size of the blank to reach the standard; 4) carrying out surface treatment on the milled blank to enable the surface of the blank to reach preset roughness and cleanliness; 5) stacking the blanks with the finished surfaces; 6) and (4) integrally loading the stacked blanks into a vacuum chamber, and performing vacuum electron beam sealing welding. The invention has the beneficial effects that: the method of the invention effectively reduces the welding stress of the vacuum seal welding of the multilayer plate blank; the problem of interface air inclusion after stacking of the multilayer plate blanks is solved; the surface cleanliness of the plate blank is ensured to meet the internal quality requirement of the large forging; when sealing and welding in vacuum, the air pressure in the vacuum chamber is less than or equal to 8.0 multiplied by 10‑2Pa, so that residual air in the sealing blank is less.
Description
Technical Field
The invention belongs to the technical field of sealing welding, and particularly relates to a vacuum sealing welding method for a multilayer plate blank.
Background
The existing plate blank vacuum seal welding method can only realize the seal welding of 2-3 plate blanks, the thickness of the seal welding blank is less than or equal to 900mm, and the seal welding blank can only be used for rolling an extra-thick steel plate and cannot be used for producing large-scale forgings. The traditional large forging piece needs to use a large steel ingot as a raw material, the large steel ingot, particularly the steel ingot with the weight of more than one hundred tons, has the defects of long production period, high energy consumption, serious internal segregation, shrinkage cavity and the like, a water gap and a riser need to be removed, and the yield is particularly low, so that the cost of the large forging piece produced by the traditional steel ingot is high, and the product quality is unstable.
CN103056466A discloses a vacuum brazing method of pre-vacuum sealing, in which: the vacuum brazing method of the pre-vacuum seal welding is realized by the following steps: firstly, fixing a part to be brazed: placing the part to be brazed in a metal container, then covering a sealing cover, and sealing and welding the part to be brazed in the metal container by locally heating the contact part of the metal container and the sealing cover in vacuum; secondly, heating: then, the metal container is placed in the air, heated to the brazing temperature and kept warm; thirdly, cooling: and (4) cooling the metal container treated in the step two to room temperature, taking out the brazed part to obtain the brazed part, and finishing the vacuum brazing method of pre-vacuum seal welding. The technical problems to be solved by the above patent application documents are to solve the problems of poor temperature uniformity of workpieces, low production efficiency and complex process when welding volatile materials in the existing vacuum brazing method.
At present, the vacuum sealing welding of the multilayer plate blank mainly has three difficulties: firstly, welding stress control, multilayer slab stack carry out continuous vacuum seal welding together, must control welding stress at lower level, prevent that unwelded gap interval from exceeding standard, prevent welded welding seam fracture. Secondly, the slab interface is air-entrained, after the multilayer slabs are stacked, the upper slab can apply great pressure to the lower slab, and air mixed in the upper slab interface and the lower slab interface is difficult to effectively extract; and thirdly, controlling the surface cleanliness of the plate blank, and producing the large forged piece with excellent internal quality only by controlling the surface cleanliness of the plate blank to reach a certain level.
After searching, the inventor does not find that related documents simultaneously solve the three problems which are difficult to solve, and therefore, the three problems need to be solved in the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a multi-layer plate blank vacuum sealing method capable of realizing high-quality and high-efficiency vacuum sealing of 2-20 layers of plate blanks.
In order to solve the three problems, the invention effectively solves the problems of excessive stress, interface gas inclusion and unqualified cleanness during the vacuum sealing welding of the multilayer plate blank by comprehensively applying a plurality of process measures such as stress relief heat treatment, blanking in a sawing mode with small residual stress, strict control of parallelism of the upper surface and the lower surface of the plate blank by milling, strict control of roughness and cleanness of the surface of the blank by surface treatment, optimized vacuum electron beam welding parameters and the like.
Specifically, the vacuum seal welding method for the multilayer plate blank provided by the invention comprises the following steps:
1) stress relief heat treatment of the plate blank;
2) sawing the heat-treated plate blank into small pieces;
3) milling the sawed blank to remove the surface defects of the blank and enable the size of the blank to reach the standard;
4) carrying out surface treatment on the milled blank to enable the surface of the blank to reach preset roughness and cleanliness;
5) stacking the blanks with the finished surfaces;
6) and (4) integrally loading the stacked blanks into a vacuum chamber, and performing vacuum electron beam sealing welding.
Preferably, in the step 1), stress relief heat treatment is performed on the plate blank, wherein the heat treatment temperature is 500-650 ℃, and the original size of the continuous casting plate blank is as follows: the length is 4440mm, the width is 2200mm, the thickness is 360mm, and the original length of the plate blank is 2-6 times, preferably 3 times of the length of the sawing and blanking.
And 2) sawing the plate blank by using a vertical belt type sawing machine.
And 3) after milling the blanks, milling and removing the upper surface and the lower surface of each blank by more than or equal to 3.0 mm.
After the blanks are milled in the step 3), the deviation of the parallelism of the upper surface and the lower surface of each blank is less than or equal to 0.20 mm.
After the surface of the blank in the step 4) is treated, the roughness of the upper surface and the lower surface of each blank is Ra3.2-Ra6.3.
After the surface of the blank is treated in the step 4), the cleanness RFU of the upper surface and the lower surface of each blank is less than or equal to 20.0.
And 5) the time interval between the stacking of the slabs and the integral loading into the vacuum chamber is less than or equal to 12 hours.
When the vacuum electron beam sealing welding in the step 6) is carried out, the air pressure of the vacuum chamber is less than or equal to 8.0 multiplied by 10 < -2 > Pa, the welding voltage is greater than or equal to 90KV, the welding current is less than or equal to 200mA, and the welding speed is 100-.
The invention has the beneficial effects that:
(1) the method of the invention effectively reduces the welding stress of the vacuum seal welding of the multilayer plate blank:
it is known that the greater the rigidity of the welded material, the greater the number of welded layers, and the greater the welding stress. The welded material is a plate blank with the thickness of 150-400 mm, obviously, the rigidity of the welded material is extremely high, and the plate blank sealing welding with 2-20 layers is realized, so that the accumulated welding stress is larger as the welding layer number is more and more backwards welded. The welding stress can cause the gap between the unwelded seams to exceed the standard, so that the technological requirements of the conventional vacuum electron beam welding can not be met, and the welded seams can crack more seriously, and finally the whole seal welding blank is scrapped.
The method effectively reduces the welding stress of the vacuum seal welding of the multilayer plate blank by the following measures, so that the welding stress meets the requirements of the seal welding of 2-20 layer plate blanks. These measures include in particular:
1) the method comprises the following steps of (1) stress relief heat treatment of a plate blank, namely, performing low-temperature heat treatment on the plate blank at the temperature of below 700 ℃, effectively relieving residual stress in the plate blank, and preventing excessive deformation or cracking of a welding line caused by the superposition of overhigh residual stress and later-stage welding stress;
2) and (4) sawing and blanking the heat-treated plate blank by using a vertical belt sawing machine. Compared with the flame cutting blanking, the sawing blanking adds very little extra stress to the edge of the plate blank, which is very favorable for the stress control during the later stage of the vacuum sealing welding of the multilayer plate blank. In addition, the vertical belt type sawing machine is used for sawing, so that the method is most suitable for the sawing mode of the ultra-long plate blank with 2-6 times of length and 2-12 m of total length, the accurate size sawing of the ultra-long plate blank can be realized, and the material utilization rate is effectively improved;
3) and the parallelism deviation of the upper surface and the lower surface of the plate blank is strictly controlled to be less than or equal to 0.20mm by milling. The parallelism of the upper surface and the lower surface of the plate blank during milling is also very critical to the control of the welding stress of the final seal welding plate blank. The parallelism of the upper surface and the lower surface of the plate blank is strictly controlled, which is beneficial to the uniform contact of the stacked plate blanks from top to bottom, effectively disperses the welding stress and avoids the overproof gap between the unwelded seams or the cracking of the welded seams caused by the over concentration of the local stress of the welding seams.
4) The welding parameters during vacuum sealing welding are controlled to be more than or equal to 90KV, less than or equal to 200mA, and the welding speed is 100-300 mm/min. The final purpose of welding parameter design is to ensure moderate welding seam strength and small welding deformation and stress. By the measures, the method effectively reduces the welding stress of the vacuum seal welding of the multilayer plate blank, and the welding stress level meets the vacuum seal welding requirement.
2. The problem of interface air inclusion after multilayer slab stacking is solved:
the more the slab stack number of piles, the upper portion slab is just bigger for the pressure that lower part slab was applyed, and the upper and lower slab laminating is more compact more, and this very easily leads to mixing with the air in the slab interface of upper and lower board thoroughly effectively to be taken out, if the air that mixes with is too much, can seriously influence the inside quality of final forging undoubtedly. According to the method, when the surface of the plate blank is treated, grains in a specific direction are polished by using a polishing sheet or an abrasive belt with specific granularity, the surface roughness of the plate blank is strictly controlled to be Ra3.2-Ra6.3, fine grooves which are regularly distributed are left on the surface of the plate blank, and sufficient circulation space is left for air inclusion, so that the problem of interface air inclusion after the multilayer continuous casting plate blank is stacked is solved.
3. A plurality of measures are taken to ensure that the surface cleanliness of the plate blank meets the internal quality requirement of the large forging piece:
the sealing blank manufactured by the method is specially used for producing large-scale forgings, the deformation pressure of the forgings during forging is distributed on the whole deformation plane, the deformation pressure born by the unit area is small, the elimination capability of the sealing blank interface is limited, and if excessive oil stains or other organic matters which cannot be carbonized remain on the sealing blank interface, the forging and pressing of the sealing blank interface are seriously hindered. The method effectively ensures the cleanness of the upper surface and the lower surface of the plate blank by the following measures, so that the plate blank can meet the sealing and welding requirements of 2-20 layer plate blanks. These measures include:
1) when the surface of the plate blank is treated, the grains in a specific direction are polished by using a polishing sheet or an abrasive belt with specific granularity, the roughness of the surface of the plate blank is strictly controlled to be Ra3.2-Ra6.3, and the specific polished grains and roughness can not only leave sufficient circulating space for the mixed air, but also prevent excessive oil stains or other organic matters which cannot be carbonized from remaining on the surface of the blank, which is a key measure for ensuring the cleanness of the upper surface and the lower surface of each blank.
2) The blank after polishing is wiped along a specific direction by using a selected wiping cloth and matching with a proper amount of absolute ethyl alcohol (the ethanol content is more than 99.7%), so that residual oil stains or other organic matters which cannot be carbonized on the surface of the blank are effectively removed, and finally the cleanness RFU of the upper surface and the lower surface of the blank is ensured to be less than or equal to 20.0. Repeated comparison tests prove that when the cleanness RFU of the upper surface and the lower surface of the blank is less than or equal to 20.0, the method can meet the internal quality requirement of the large forging.
3) The time interval between the start of stacking the slabs and the integral loading of the slabs into the vacuum chamber is less than or equal to 12 hours, the stacking of the multi-layer continuous casting slabs cannot be completed in a short time, and the oxidation of the upper surface and the lower surface of the slabs exceeds the standard in an overlong time, so that the internal quality requirement of a large forging cannot be met.
4) When sealing and welding in vacuum, the air pressure in the vacuum chamber is less than or equal to 8.0 multiplied by 10-2Pa, ensuring that residual air in the seal welding blank is less after seal welding.
By adopting the measures, the surface cleanliness of the plate blank is ensured to meet the internal quality requirement of the large forging.
Drawings
FIG. 1 is a photograph of a 12Cr2Mo1V steel blank for sealing in example 1 of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art may better understand the invention, but the invention is not limited thereto.
Example 1
The material of the sealing blank is 12Cr2Mo1V, and the number of the sealing blank layers is 9.
The vacuum seal welding method for the multilayer plate blank comprises the following steps:
1) stress relief heat treatment of the plate blank, wherein the heat treatment temperature is 600 ℃, and the original size of the continuous casting plate blank is as follows: the length is 4440mm, the width is 2200mm, the thickness is 360mm, and the original length of the plate blank is 3 times of the length of the sawing blanking;
2) sawing the heat-treated plate blank into small materials, sawing the plate blank by using a vertical belt sawing machine, wherein the length of the blanked plate blank is 1475 mm;
3) milling the sawed blank to remove the surface defects of the blank, wherein the milled size of each blank is 1465mm multiplied by 2175mm multiplied by 350mm, the milling removal amount of the upper surface and the lower surface of each blank is 5.0mm, and the parallelism deviation of the upper surface and the lower surface of each blank is less than or equal to 0.20 mm;
4) performing surface treatment on the milled blank to enable the surface of the blank to reach preset roughness and cleanliness, wherein after the surface treatment of the blank, the roughness of the upper surface and the lower surface of each blank is Ra6.3, and the cleanliness RFU of the upper surface and the lower surface of each blank is less than or equal to 20.0;
5) and stacking the blanks with the finished surfaces, wherein the stacking layers are 9. The time interval between the stacking of the slabs and the integral loading into the vacuum chamber is 6 hours;
6) the stacked blanks are integrally loaded into a vacuum chamber for vacuum electron beam sealing welding, and the air pressure of the vacuum chamber is less than or equal to 8.0 multiplied by 10 during the vacuum electron beam sealing welding-2Pa, welding voltage =100KV, welding current =120mA, welding speed =230 mm/min.
7) The length, the width and the height of the sealing steel ingot are =2175mm, the length, the width and the height are 1465mm, the length, the height and the height are 3140mm, and the total weight is 75.0 tons. The sealing and welding steel ingot is forged and ring-rolled to obtain a barrel-shaped forging with the outer diameter of 4000mm, the inner diameter of 2800mm and the height of 1400mm, and a final finished product is obtained through subsequent heat treatment and machining. The forging is subjected to ultrasonic flaw detection, and the result shows that only a small amount of point defects exist in the forging, the maximum equivalent phi of the defects is 2.5mm, and the JB/T4730.3-2005I-level requirements are met.
Example 2
The material of the sealing material S355NL, and the number of layers of the sealing material S11.
The vacuum seal welding method for the multilayer plate blank comprises the following steps:
1) stress relief heat treatment of the plate blank, wherein the heat treatment temperature is 550 ℃, and the original size of the continuous casting plate blank is as follows: the length is 6120mm, the width is 2200mm, the thickness is 300mm, and the original length of the plate blank is 4 times of the length of the sawing blanking;
2) sawing the heat-treated plate blank into small pieces, sawing the plate blank by using a vertical belt sawing machine, wherein the length of the blanked plate blank is 1505 mm;
3) milling the sawed blank to remove the surface defects of the blank, wherein the milled size of each blank is 1495mm multiplied by 2175mm multiplied by 293mm, the milling removal amount of the upper surface and the lower surface of each blank is 3.5mm, and the parallelism deviation of the upper surface and the lower surface of each blank is less than or equal to 0.20 mm;
4) performing surface treatment on the milled blank to enable the surface of the blank to reach preset roughness and cleanliness, wherein after the surface treatment of the blank, the roughness of the upper surface and the lower surface of each blank is Ra3.2, and the cleanliness RFU of the upper surface and the lower surface of each blank is less than or equal to 20.0;
5) and stacking the blanks with the finished surfaces, wherein the number of stacked layers is 11. The time interval between the stacking of the slabs and the integral loading into the vacuum chamber is 7 hours;
6) the stacked blanks are integrally loaded into a vacuum chamber for vacuum electron beam sealing welding, and the air pressure of the vacuum chamber is less than or equal to 8.0 multiplied by 10 during the vacuum electron beam sealing welding-2Pa, welding voltage =100KV, welding current =150mA, welding speed =200 mm/min.
7) The length, the width and the height of the sealed steel ingot are =2175mm, the 1495mm and the 3230mm, and the total weight is 82.5 tons. The seal welding steel ingot is forged and ring-rolled to obtain an annular forging with the outer diameter of 7585mm, the inner diameter of 6615mm and the height of 860mm, and a final finished product is obtained through subsequent heat treatment and machining. The forging is subjected to ultrasonic flaw detection, and the result shows that the forging has no defects inside and meets the JB/T4730.3-2005I-level requirement.
Example 3
The material of the sealing blank is 35, and the number of the sealing blank layers is 8.
The vacuum seal welding method for the multilayer plate blank comprises the following steps:
1) stress relief heat treatment of the plate blank, wherein the heat treatment temperature is 550 ℃, and the original size of the continuous casting plate blank is as follows: the length is 6850mm, the width is 2040mm and the thickness is 300mm, and the original length of the plate blank is 5 times of the length of the sawing and blanking;
2) sawing the heat-treated plate blank into small materials, sawing the plate blank by using a vertical belt sawing machine, wherein the length of the blanked plate blank is 1360 mm;
3) milling the sawed blanks to remove the surface defects of the blanks, wherein the milled size of each blank is 1350mm multiplied by 2020mm multiplied by 293mm, the milling removal amount of the upper surface and the lower surface of each blank is 6.3mm, and the parallelism deviation of the upper surface and the lower surface of each blank is less than or equal to 0.20 mm;
4) performing surface treatment on the milled blank to enable the surface of the blank to reach preset roughness and cleanliness, wherein after the surface treatment of the blank, the roughness of the upper surface and the lower surface of each blank is Ra3.2, and the cleanliness RFU of the upper surface and the lower surface of each blank is less than or equal to 20.0;
5) and stacking the blanks with the finished surfaces, wherein the stacking layer number is 8. The time interval between the stacking of the slabs and the integral loading into the vacuum chamber is 5 hours;
6) the stacked blanks are integrally loaded into a vacuum chamber for vacuum electron beam sealing welding, and the air pressure of the vacuum chamber is less than or equal to 8.0 multiplied by 10 during the vacuum electron beam sealing welding-2Pa, welding voltage =100KV, welding current =130mA, welding speed =250 mm/min.
7) The length, the width and the height of the sealing steel ingot are =2020mm, 1350mm and 2322mm, and the total weight is 49.71 tons. The seal-welded steel ingot is forged and ring-rolled to obtain an annular forging with the outer diameter of 5710mm, the inner diameter of 5080mm and the height of 1050, and a final finished product is obtained through subsequent heat treatment and machining. The forging is subjected to ultrasonic flaw detection, and the result shows that a small amount of point defects exist in the forging, the maximum equivalent phi of the defects is 1.5mm, and the JB/T4730.3-2005I-level requirements are met.
Example 4
The material quality of the sealing welding blank material Q235, and the number of the sealing welding blank layers is 20.
The vacuum seal welding method for the multilayer plate blank comprises the following steps:
1) and (3) stress relief heat treatment of the continuous casting slab, wherein the heat treatment temperature is 500 ℃. Original size of continuous casting slab: the length is 9210mm, the width is 1545mm, the thickness is 200mm, and the original length of the continuous casting slab is 6 times of the length of the sawing and blanking;
2) sawing the heat-treated plate blank into small pieces, and sawing the continuous casting plate blank by using a vertical belt sawing machine, wherein the length of the blanked blank is 1535 mm;
3) milling the sawed blank to remove the surface defects of the blank, wherein the milled size of each blank is 1520mm multiplied by 1530mm multiplied by 193mm, the milling removal amount of the upper surface and the lower surface of each blank is 3.5mm, and the parallelism deviation of the upper surface and the lower surface of each blank is less than or equal to 0.20 mm;
4) performing surface treatment on the milled blanks to enable the surfaces of the blanks to reach preset roughness and cleanliness, wherein after the surface treatment of the blanks, the roughness of the upper surface and the roughness of the lower surface of each blank are Ra3.2, and the clean RFU of the upper surface and the lower surface of each blank is less than or equal to 20.0;
5) and stacking the blanks with the finished surfaces, wherein the stacking layers are 20. The time interval between the stacking of the slabs and the integral loading into the vacuum chamber is 12 hours;
6) and integrally loading the stacked blanks into a vacuum chamber, and performing vacuum electron beam sealing, wherein the air pressure of the vacuum chamber is less than or equal to 8.0 multiplied by 10 < -2 > Pa, the welding voltage =100KV, the welding current =200mA, and the welding speed =270mm/min during vacuum electron beam sealing.
7) The length multiplied by the width multiplied by the height =1530mm multiplied by 1520mm multiplied by 3870mm of the sealed steel ingot and the total weight of 70.65 tons are obtained after the steps. The sealing and welding steel ingot is forged and ring-rolled to obtain a barrel-shaped forging with the outer diameter of 4540mm, the inner diameter of 4000mm and the height of 2200, and a final finished product is obtained through subsequent heat treatment and machining. The forging is subjected to ultrasonic flaw detection, and the result shows that the inside of the forging is free of defects and meets the JB/T4730.3-2005I-level requirement.
As can be seen from the four embodiments, the invention adopts the specific process treatment and ultrasonic flaw detection to show that the interior of each forging is free of defects and meets the JB/T4730.3-2005I-level requirement. The invention effectively eliminates the residual stress in the plate blank, and prevents the excessive deformation or cracking of the welding seam caused by the superposition of the overhigh residual stress and the later welding stress; the improvement of the invention effectively reduces the welding stress of the vacuum seal welding of the multilayer plate blank, so that the welding stress level meets the requirement of the vacuum seal welding.
Claims (11)
1. A vacuum seal welding method for a multilayer slab comprises the following steps:
1) stress relief heat treatment of the plate blank;
2) sawing the heat-treated plate blank into small pieces;
3) milling the sawed blank to remove the surface defects of the blank and enable the size of the blank to reach the standard;
4) performing surface treatment on the milled blank to enable the surface of the blank to reach preset roughness and cleanliness and enable the surface of the blank to form polishing grains in a specific direction;
5) stacking the blanks with the finished surfaces;
6) and (4) integrally loading the stacked blanks into a vacuum chamber, and performing high-voltage vacuum electron beam sealing welding at the welding voltage of more than or equal to 90 KV.
2. A vacuum seal welding method for multi-layer plate blanks as claimed in claim 1, wherein the original length of the plate blanks in the step 1) is 2-6 times of the length of the sawing blanking.
3. A method of vacuum sealing a multi-layer blank as claimed in claim 1, wherein the original length of the blank in step 1) is 3 times the length of the saw cut blank.
4. The vacuum seal welding method for the multilayer slab as claimed in claim 1, wherein the slab in the step 1) is subjected to stress relief heat treatment at a temperature of 500-650 ℃, and the original size of the continuous cast slab is as follows: the length is 4440mm, the width is 2200mm, the thickness is 360mm, and the original length of the plate blank is 2-6 times of the length of the sawing blanking.
5. A multi-layer blank vacuum sealing method as claimed in claim 1, wherein the blank in step 2) is sawed by using a vertical band sawing machine.
6. The vacuum seal welding method for the multilayer slabs as claimed in claim 1, wherein after the milling of the slabs in the step 3), the milling removal amount of the upper surface and the lower surface of each slab is more than or equal to 3.0 mm.
7. A vacuum seal welding method for multi-layer plate blanks as claimed in claim 1, wherein after the blanks are milled in the step 3), the deviation of the parallelism of the upper surface and the lower surface of each blank is less than or equal to 0.20 mm.
8. A vacuum seal welding method for multi-layer plate blank as claimed in claim 1, characterized in that after the surface treatment of the blank in the step 4), the roughness of the upper surface and the lower surface of each blank is Ra3.2-Ra6.3.
9. The multi-layer slab vacuum seal welding method as claimed in claim 1, wherein the cleanness RFU of the upper surface and the lower surface of each slab is less than or equal to 20.0 after the surface treatment of the slabs in the step 4).
10. A method for vacuum sealing and welding of multi-layered slabs as claimed in claim 1, wherein the time interval between the start of stacking the slabs in step 5) and the time of loading the whole slabs into the vacuum chamber is not more than 12 hours.
11. The vacuum seal welding method for multi-layer plate blank as claimed in claim 1, wherein, in the step 6), the air pressure of the vacuum chamber is less than or equal to 8.0 x 10 during the vacuum electron beam seal welding-2Pa, welding current less than or equal to 200mA, and welding speed of 100-300 mm/min.
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| CN112475584B (en) * | 2020-10-19 | 2022-07-01 | 伊莱特能源装备股份有限公司 | Plate blank surface treatment method for vacuum seal welding |
| CN112475583B (en) * | 2020-10-19 | 2022-05-31 | 伊莱特能源装备股份有限公司 | Method for improving sealing welding efficiency of vacuum electron beam of multilayer plate blank |
| CN114378537A (en) * | 2022-01-14 | 2022-04-22 | 伊莱特能源装备股份有限公司 | Process for improving qualified rate of medium carbon alloy steel laminated blanks |
| CN114603314A (en) * | 2022-02-21 | 2022-06-10 | 伊莱特能源装备股份有限公司 | Manufacturing process of support ring forge piece of ten-thousand-ton-level aluminum extrusion machine |
| CN114505652A (en) * | 2022-03-04 | 2022-05-17 | 伊莱特能源装备股份有限公司 | Method for preventing surface cracking of austenitic stainless steel forging in manufacturing process |
| CN115121929A (en) * | 2022-06-29 | 2022-09-30 | 中国科学院金属研究所 | Vacuum electron beam packaging method for preventing cracking of difficult-to-weld metal |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121306A (en) * | 2007-09-20 | 2008-02-13 | 彭志辉 | Middle temperature welding multi-layer composite aluminium alloy board, belt (foil) its preparation method |
| CN102764936A (en) * | 2012-07-27 | 2012-11-07 | 济钢集团有限公司 | Big-thickness slab manufacturing technique |
| CN103972628A (en) * | 2014-04-24 | 2014-08-06 | 成都锦江电子系统工程有限公司 | Self-positioning stepped twisted waveguide and vacuum brazing process thereof |
| CN105598327A (en) * | 2015-03-26 | 2016-05-25 | 中国科学院金属研究所 | Layered multi-line stacking metal construction method |
| CN106312454A (en) * | 2016-08-29 | 2017-01-11 | 辽宁北祥重工机械制造有限公司 | Method for producing main shaft forging through stacked forging of multi-element homogeneous metal |
| CN106695106A (en) * | 2016-12-09 | 2017-05-24 | 天津大学 | Vacuum electron beam welding method and application of vacuum electron beam welding method to welding of hydroelectric steel |
| CN108188659A (en) * | 2017-12-21 | 2018-06-22 | 中国原子能科学研究院 | A kind of manufacturing process of steel billet |
| CN108724890A (en) * | 2018-04-25 | 2018-11-02 | 东北轻合金有限责任公司 | A kind of production method of the aluminium alloy compound plate and strip blank of middle layer alloy side low-angle milling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU177996B (en) * | 1979-01-23 | 1982-02-28 | Ganz Arammeroegyar | Method and device for forming plate packets,in particular,plate packets of stator,of rotor or of transformer and other metal plate packets |
-
2019
- 2019-06-28 CN CN201910571158.7A patent/CN110405413B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121306A (en) * | 2007-09-20 | 2008-02-13 | 彭志辉 | Middle temperature welding multi-layer composite aluminium alloy board, belt (foil) its preparation method |
| CN102764936A (en) * | 2012-07-27 | 2012-11-07 | 济钢集团有限公司 | Big-thickness slab manufacturing technique |
| CN103972628A (en) * | 2014-04-24 | 2014-08-06 | 成都锦江电子系统工程有限公司 | Self-positioning stepped twisted waveguide and vacuum brazing process thereof |
| CN105598327A (en) * | 2015-03-26 | 2016-05-25 | 中国科学院金属研究所 | Layered multi-line stacking metal construction method |
| CN106312454A (en) * | 2016-08-29 | 2017-01-11 | 辽宁北祥重工机械制造有限公司 | Method for producing main shaft forging through stacked forging of multi-element homogeneous metal |
| CN106695106A (en) * | 2016-12-09 | 2017-05-24 | 天津大学 | Vacuum electron beam welding method and application of vacuum electron beam welding method to welding of hydroelectric steel |
| CN108188659A (en) * | 2017-12-21 | 2018-06-22 | 中国原子能科学研究院 | A kind of manufacturing process of steel billet |
| CN108724890A (en) * | 2018-04-25 | 2018-11-02 | 东北轻合金有限责任公司 | A kind of production method of the aluminium alloy compound plate and strip blank of middle layer alloy side low-angle milling |
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