CN114888407B - Technological method for surfacing H2Cr13 on outer circle surface of large plunger - Google Patents
Technological method for surfacing H2Cr13 on outer circle surface of large plunger Download PDFInfo
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- CN114888407B CN114888407B CN202210598759.9A CN202210598759A CN114888407B CN 114888407 B CN114888407 B CN 114888407B CN 202210598759 A CN202210598759 A CN 202210598759A CN 114888407 B CN114888407 B CN 114888407B
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- 238000000034 method Methods 0.000 title claims abstract description 76
- 238000003466 welding Methods 0.000 claims abstract description 79
- 230000008569 process Effects 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000004907 flux Effects 0.000 claims abstract description 9
- 230000007547 defect Effects 0.000 claims abstract description 7
- 239000011229 interlayer Substances 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000006247 magnetic powder Substances 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000010410 layer Substances 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a process method for surfacing H2Cr13 on the outer circle surface of a large plunger, which comprises the following steps: h2Cr13 steel strip and SJ325 flux are selected for strip electrode surfacing; dividing the outer circle surface of the plunger into a plurality of surfacing areas; preheating the position to be overlaid of the plunger and the periphery thereof to 200-250 ℃; performing overlaying according to an overlaying direction interval from the bottom of the plunger to the end of the plunger based on a plurality of overlaying areas divided by the outer circle surface of the plunger, wherein each overlaying area is subjected to overlaying once, the welding current is 870-890A, the welding voltage is 24-27V, the welding speed is 13-15 mm/min, and the interlayer temperature is controlled to be 200-250 ℃ in the overlaying process; the post heat is applied to the plunger immediately after the welding of all the welding areas is completed. The process method can effectively reduce the build-up welding stress, does not need to enter a furnace for stress relief heat treatment after welding, can meet the requirements of build-up welding thickness and surface hardness by precisely controlling build-up welding parameters and build-up welding a layer of H2Cr13, reduces welding defects caused by human factors, has reliable product quality and high welding efficiency, and reduces production cost and production period.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a process method for surfacing H2Cr13 on the outer circle surface of a large plunger.
Background
In the prior art, when H2Cr13 is deposited on the surface of the excircle of the large plunger, a gas shielded welding multilayer deposited welding or common submerged arc welding multilayer deposited welding method is generally adopted, and after the deposited welding is finished, the material is fed into a furnace to be subjected to stress relief heat treatment, so that the production period is long, the efficiency is low and the cost is high. Moreover, when gas shielded welding is adopted for surfacing, the surfacing defects are easily caused by more human factors; when common submerged arc welding is adopted for surfacing, because the number of the surfacing passes is large, the lap joint inconsistency is very easy to occur among the welding passes, the height of the surfacing surface is uneven, the surfacing hardness is uneven, and therefore the product quality is affected.
Disclosure of Invention
In order to solve part or all of the technical problems in the prior art, the invention provides a process method for surfacing H2Cr13 on the outer circle surface of a large plunger, which comprises the following steps:
step 1, preparing a surfacing material, namely performing strip surfacing by selecting an H2Cr13 steel strip and SJ325 welding flux;
step 2, preprocessing the plunger, namely dividing the outer circle surface of the plunger into a plurality of surfacing areas according to the outline dimension of the plunger;
step 3, preheating the plunger, namely supporting and rotating the plunger by using a carrier roller, and preheating the position to be overlaid of the plunger and the periphery of the position to be overlaid to 200-250 ℃;
step 4, carrying out regional interval overlaying on the outer circular surface of the plunger, wherein:
multiple build-up welding areas divided based on outer circle surface of plunger, build-up welding from bottom of plunger to end of plunger
Performing overlaying at intervals in the direction, and performing overlaying once in each overlaying region;
the build-up welding parameters are set as follows: the welding current is 870-890A, the welding voltage is 24-27V, and the welding speed is 13-15 mm/min;
when each build-up welding area is built-up welded, the plunger is controlled to rotate along the rotation direction, and build-up welding is carried out along the build-up welding direction
And under the combined action of rotating the plunger in the rotating direction, realizing automatic build-up welding of the circumferential spiral;
in the process of overlaying welding, the interlayer temperature is controlled to be 200-250 ℃, such as the temperature is lower than 200 ℃, the plunger is heated in time, such as the temperature is higher than 250 ℃, the plunger is naturally cooled to 200-250 ℃, and then welding is continued;
and 5, post-heating the plunger immediately after the completion of the surfacing, heating the plunger to 300-350 ℃ after the completion of the welding of all welding areas, and then preserving heat for 6 hours to completely convert the surfacing H2Cr13 into martensite.
Further, in the above-mentioned process method for surfacing H2Cr13 on the outer circumference of the large-sized plunger, in step 2, the number of surfacing regions is determined according to the size from the bottom of the plunger to the end of the plunger, and the larger the size from the bottom of the plunger to the end of the plunger, the larger the number of surfacing regions.
Further, in the process method for surfacing H2Cr13 on the surface of the large-scale plunger outer circle, the surface of the plunger outer circle is sequentially divided into a first surfacing region, a fourth surfacing region, a second surfacing region, a fifth surfacing region and a third surfacing region from the bottom of the plunger to the end of the plunger, wherein the fourth surfacing region is positioned between the first surfacing region and the second surfacing region, the fifth surfacing region is positioned between the second surfacing region and the third surfacing region, and the length of each surfacing region is set to 300-800 mm.
In the process method of surfacing H2Cr13 on the outer surface of the large plunger, in step 4, the first, second, third, fourth, and fifth surfacing regions are surfacing at different intervals.
Further, the process method for surfacing H2Cr13 on the outer circle surface of the large plunger further comprises the following step 6: and after the plunger is cooled to room temperature, turning or grinding the outer round surface of the plunger.
Further, the process method for surfacing H2Cr13 on the outer circle surface of the large plunger further comprises the following step 7: and performing magnetic powder inspection on the processed outer circle surface of the plunger piston, wherein no welding defect is qualified.
Further, the process method for surfacing H2Cr13 on the outer circle surface of the large plunger further comprises the following step 8: and (3) performing hardness inspection on the surfacing surface of the plunger, wherein the Rockwell hardness HRC 43-48 is satisfied.
Further, in the above-mentioned process method for surfacing H2Cr13 on the outer circumference of a large-sized plunger, in step 1, the H2Cr13 steel strip has a gauge of 0.5X160 mm.
In the process method of surfacing H2Cr13 on the outer circle surface of the large plunger, in the step 1, rust and burr removal pretreatment is carried out on the H2Cr13 steel belt, and SJ325 welding flux is dried for 1-2 hours at 350 ℃; in step 2, the plunger is subjected to a rust-removing burr treatment.
In the process method for surfacing H2Cr13 on the outer circle of the large-sized plunger, in the step 3, when the plunger is preheated, the part to be surfacing of the plunger and the part within 150mm of the periphery of the part to be surfacing are preheated to 200-250 ℃.
In the process method of surfacing H2Cr13 on the outer circle surface of the large plunger, in the step 4, surfacing on the outer circle surface of the plunger is continuously carried out, and when the welding is interrupted, the interlayer temperature is kept at 200-250 ℃ and then the welding is continued.
Further, in the process method for surfacing H2Cr13 on the outer circle surface of the large-sized plunger, the plunger is heated in a flame heating mode.
Further, in the technical method for surfacing H2Cr13 on the outer circle surface of the large-sized plunger, the plunger is made of 35 steel.
The process method for surfacing H2Cr13 on the outer circle surface of the large plunger has the following advantages and beneficial effects:
the outer circle surface of the plunger is subjected to regional interval surfacing, and after finishing, post-heating is immediately performed, so that surfacing stress is effectively reduced, after welding, stress elimination heat treatment is not required to be performed in a furnace, the production period and the production cost are obviously reduced, and the welding efficiency is improved;
by accurately controlling the surfacing parameters, the surfacing layer H2Cr13 can meet the requirements of surfacing thickness of 4mm and surface hardness HRC 43-48 after processing, thereby effectively avoiding surfacing of a transition layer and further reducing production cost and production period;
the H2Cr13 steel strip and the SJ325 flux are used for carrying out strip electrode automatic surfacing, so that the welding efficiency is further improved, various welding defects generated by human factors are reduced to the greatest extent, and the product quality is reliable.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic diagram of a plunger surfacing region division and surfacing sequence adopted in a process method for surfacing H2Cr13 on the outer circle of a large plunger;
fig. 2 is a side view of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, the process method for surfacing H2Cr13 on the outer circle surface of the large plunger comprises the following steps:
step 1, preparing a surfacing material. H2Cr13 steel strip 20 with the specification of 0.5 multiplied by 60mm and SJ325 flux are selected for strip electrode surfacing.
And step 2, plunger pretreatment. The outer circumferential surface of the plunger 10 is divided into a plurality of build-up welding areas according to the outer dimensions of the plunger.
And step 3, preheating the plunger. The carrier roller is used for supporting and rotating the plunger, the position to be overlaid and the periphery of the plunger are preheated to 200-250 ℃, the plunger is rotated as much as possible in the preheating process, and the preheating and heat preservation method is adopted to ensure that the preheating of the periphery of the plunger is uniform and consistent.
And 4, carrying out regional interval overlaying on the outer circular surface of the plunger. Performing overlaying according to an overlaying direction A from the bottom of the plunger to the end of the plunger at intervals based on a plurality of overlaying areas divided by the outer circle surface of the plunger, and performing one-time overlaying for each overlaying area; the build-up welding parameters are set as follows: the welding current is 870-890A, the welding voltage is 24-27V, and the welding speed is 13-15 mm/min; when each build-up welding area is built-up welded, the plunger is controlled to rotate along the rotation direction B, so that the automatic build-up welding of the spiral turns is realized under the combined action of build-up welding along the build-up welding direction A and the rotation of the plunger along the rotation direction B; in the process of overlaying welding, the interlayer temperature is controlled to be 200-250 ℃, such as the temperature is lower than 200 ℃, the plunger is heated in time, such as the temperature is higher than 250 ℃, the plunger is naturally cooled to 200-250 ℃, and then welding is continued; the surfacing of the outer circle surface of the plunger is continuously carried out, and when the situation that the welding is required to be interrupted, such as the replacement of a steel belt, the replacement of a surfacing area and the like, the interlayer temperature is required to be kept at 200-250 ℃ and then the welding is continued.
And 5, post-heating after the surfacing is finished. And after all the welding areas are welded, immediately post-heating the plunger, heating the plunger to 300-350 ℃, and then preserving heat for 6 hours to ensure that the H2Cr13 deposited on the welding surface is completely converted into martensite.
In the process method for surfacing H2Cr13 on the outer circle of the large plunger, in the step 1, pretreatment such as rust and burrs removal is carried out on the H2Cr13 steel strip, and the SJ325 welding flux is dried for 1-2 hours at 350 ℃.
In a specific embodiment, in the process of surfacing H2Cr13 on the outer circumference of the large plunger according to the present invention, in step 2, the plunger 10 is subjected to a treatment such as rust cleaning.
In a specific embodiment, in the process of the large-scale plunger outer circle surfacing H2Cr13 of the present invention, in step 2, the number of surfacing areas is determined according to the size from the plunger bottom 11 to the plunger end 12, and the larger the size from the plunger bottom 11 to the plunger end 12, the larger the number of surfacing areas.
Preferably, the outer circle surface of the plunger is divided into a first build-up area 1, a fourth build-up area 4, a second build-up area 2, a fifth build-up area 5 and a third build-up area 3 in sequence from the bottom of the plunger to the end of the plunger, wherein the fourth build-up area 4 is positioned between the first build-up area 1 and the second build-up area 2, the fifth build-up area 5 is positioned between the second build-up area 2 and the third build-up area 3, and the length of each build-up area is set to 300-800 mm.
In the process method for surfacing H2Cr13 on the outer circle of the large plunger, in the step 3, when the plunger is preheated, the part to be surfacing of the plunger and the part within 150mm of the periphery of the part are preheated to 200-250 ℃.
In a specific embodiment, in the process method for surfacing H2Cr13 on the outer circle surface of the large plunger according to the present invention, in step 4, the first surfacing region 1, the second surfacing region 2, the third surfacing region 3, the fourth surfacing region 4, and the fifth surfacing region 5 are surfacing with a divided interval in this order.
As a specific implementation mode, in the technical method for surfacing H2Cr13 on the outer circle of the large plunger, the plunger is heated by adopting a flame heating mode.
As a specific implementation mode, in the technical method for surfacing H2Cr13 on the outer circle surface of the large-sized plunger, the plunger is made of 35 steel.
As a specific implementation mode, the technical method for surfacing H2Cr13 on the outer circle surface of the large plunger piston further comprises the following step 6: and after the plunger is cooled to room temperature, turning or grinding the outer round surface of the plunger.
As a specific implementation mode, the technical method for surfacing H2Cr13 on the outer circle surface of the large plunger comprises the following steps: and performing magnetic powder inspection on the processed outer circle surface of the plunger piston, wherein no welding defect is qualified.
As a specific implementation mode, the technical method for surfacing H2Cr13 on the outer circle surface of the large plunger piston further comprises the following step 8: and (3) performing hardness inspection on the surfacing surface of the plunger, wherein the Rockwell hardness HRC 43-48 is satisfied.
Through practical tests, by using the technical method for surfacing H2Cr13 on the outer circle surface of the large plunger, the thickness of a surfacing layer of H2Cr13 can be ensured to be not less than 4mm, when the surfacing layer is reserved for 2-3mm after the outer circle surface of the plunger is processed, the surfacing surface hardness of the plunger is HRC 44-45, and the use requirement of HRC 43-48 on the outer circle surface of the plunger after processing is met.
In summary, compared with the prior art, the technical method for surfacing H2Cr13 on the outer circle surface of the large plunger has the following advantages and beneficial effects:
1. the surface of the outer circle of the plunger is subjected to regional interval surfacing, and after finishing, post-heating is immediately performed, so that surfacing stress is effectively reduced, after welding, stress elimination heat treatment is not required to be performed in a furnace, production period and production cost are obviously reduced, and welding efficiency is improved.
2. By accurately controlling the surfacing parameters, the surfacing layer H2Cr13 can meet the requirements of surfacing thickness of 4mm and surface hardness HRC 43-48 after processing, thereby effectively avoiding surfacing of a transition layer and further reducing production cost and production period.
3. The H2Cr13 steel strip and the SJ325 flux are used for carrying out strip electrode automatic surfacing, so that the welding efficiency is further improved, various welding defects generated by human factors are reduced to the greatest extent, and the product quality is reliable.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, unless otherwise specified, herein, "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are referred to the placed state shown in the drawings.
It should also be noted that the above embodiments are merely for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A process method for surfacing H2Cr13 on the outer circle surface of a large plunger is characterized by comprising the following steps:
step 1, preparing a surfacing material, namely performing strip surfacing by selecting an H2Cr13 steel strip and SJ325 welding flux;
step 2, preprocessing the plunger, namely dividing the outer circle surface of the plunger into a plurality of surfacing areas according to the outline dimension of the plunger;
step 3, preheating the plunger, namely supporting and rotating the plunger by using a carrier roller, and preheating the position to be overlaid of the plunger and the periphery of the position to be overlaid to 200-250 ℃;
step 4, carrying out regional interval overlaying on the outer circular surface of the plunger, wherein:
performing overlaying according to the overlaying direction from the bottom of the plunger to the end of the plunger at intervals based on a plurality of overlaying areas divided by the outer circle surface of the plunger, and performing one-time overlaying for each overlaying area;
the build-up welding parameters are set as follows: the welding current is 870-890A, the welding voltage is 24-27V, and the welding speed is 13-15 mm/min;
when each build-up welding area is built-up welded, the plunger is controlled to rotate along the rotation direction, and under the combined action of build-up welding along the build-up welding direction and the plunger rotating along the rotation direction, the automatic build-up welding of the spiral of the circle is realized;
in the process of overlaying welding, the interlayer temperature is controlled to be 200-250 ℃, such as the temperature is lower than 200 ℃, the plunger is heated in time, such as the temperature is higher than 250 ℃, the plunger is naturally cooled to 200-250 ℃, and then welding is continued;
and 5, post-heating the plunger immediately after the completion of the surfacing, heating the plunger to 300-350 ℃ after the completion of the welding of all welding areas, and then preserving heat for 6 hours to completely convert the surfacing H2Cr13 into martensite.
2. A process for the surfacing H2Cr13 of the outer circle of a large piston according to claim 1, wherein in step 2 the number of surfacing areas is determined according to the size from the bottom of the piston to the end of the piston, the larger the number of surfacing areas.
3. The process of surfacing H2Cr13 for a large-sized plunger outer according to claim 2, wherein the plunger outer surface is divided into a first surfacing region, a fourth surfacing region, a second surfacing region, a fifth surfacing region, and a third surfacing region in this order from the bottom of the plunger to the end of the plunger, wherein the fourth surfacing region is located between the first surfacing region and the second surfacing region, the fifth surfacing region is located between the second surfacing region and the third surfacing region, and the length of each surfacing region is set to 300 to 800mm.
4. A process for surfacing H2Cr13 on the outer circumference of a large plunger according to claim 3, wherein in step 4, the first, second, third, fourth, and fifth surfacing regions are surfaced at a zoned interval in that order.
5. The process for surfacing H2Cr13 on the outer circumference of a large plunger according to claim 1, further comprising step 6: and after the plunger is cooled to room temperature, turning or grinding the outer round surface of the plunger.
6. The process for surfacing H2Cr13 on the outer circumference of a large plunger according to claim 5, further comprising step 7: and performing magnetic powder inspection on the processed outer circle surface of the plunger piston, wherein no welding defect is qualified.
7. The process of surfacing H2Cr13 on the outer circumference of a large plunger according to claim 6, further comprising step 8: and (3) performing hardness inspection on the surfacing surface of the plunger, wherein the Rockwell hardness HRC 43-48 is satisfied.
8. The process for surfacing H2Cr13 on the outer circumference of a large piston according to claim 1, wherein in step 1, the H2Cr13 steel strip has a gauge of 0.5 x 60mm.
9. The process for surfacing H2Cr13 on the outer circle of a large plunger according to claim 1, wherein in the step 1, the H2Cr13 steel belt is subjected to rust cleaning burr pretreatment, and the SJ325 flux is dried for 1-2 hours at 350 ℃; in step 2, the plunger is subjected to a rust-removing burr treatment.
10. The process for surfacing H2Cr13 on the outer circumference of a large-sized plunger according to claim 1, wherein in the step 3, the portion of the plunger to be surfacing and the portion within 150mm of the periphery of the portion to be surfacing are preheated to 200-250 ℃ when the plunger is preheated.
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| CN202210598759.9A CN114888407B (en) | 2022-05-30 | 2022-05-30 | Technological method for surfacing H2Cr13 on outer circle surface of large plunger |
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| CN103341684A (en) * | 2013-06-28 | 2013-10-09 | 四川蓝星机械有限公司 | Surface overlaying technique of cylinder body made of carbon steel with small diameter, or low alloy steel or heatproof steel |
| CN104551352A (en) * | 2014-12-08 | 2015-04-29 | 上海核电装备焊接及检测工程技术研究中心（筹） | Dissimilar metal welding method |
| CN105215571A (en) * | 2015-09-22 | 2016-01-06 | 机械科学研究院哈尔滨焊接研究所 | Add nuclear power NiCrFe alloy welding deposit welding and the welding method of Mn and Nb |
| WO2017079996A1 (en) * | 2015-11-12 | 2017-05-18 | 上海电气核电设备有限公司 | Method for depositing stainless steel on low-alloy content steel base material using strip electrode by submerged arc process |
| CN109570695A (en) * | 2018-12-04 | 2019-04-05 | 四川川润液压润滑设备有限公司 | Process method for H3Cr13 surfacing on surface of 45 steel |
| CN111774692A (en) * | 2019-04-03 | 2020-10-16 | 南京宝色股份公司 | Large-barrel-cladding nickel-based surfacing process |
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