CN108581133A - A kind of production method of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel - Google Patents
A kind of production method of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel Download PDFInfo
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- CN108581133A CN108581133A CN201810651704.3A CN201810651704A CN108581133A CN 108581133 A CN108581133 A CN 108581133A CN 201810651704 A CN201810651704 A CN 201810651704A CN 108581133 A CN108581133 A CN 108581133A
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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
- B23K9/04—Welding for other purposes than joining, e.g. built-up 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
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of production methods of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel, including using No. 35 steel to make piston body, after being derusted, being deoiled and being preheated to piston body, in three layers of piston body surface overlaying 2Cr13,3Cr13 or 4Cr13 stainless steel, again plunger is obtained after expanding hydrogen processing, the plunger processed using this method, it is controlled using stringent built-up welding temperature, three layers of martensitic stain less steel of built-up welding in plunger body, it is effectively prevent cold crack, cost is reduced while ensureing plunger hardness.
Description
Technical field
The present invention relates to the production methods of hydraulic test plunger, particularly relate to a kind of heavy hydraulic equipment carbon steel plunger surface
The production method of built-up welding martensitic stain less steel.
Background technology
Plunger is the core component of hydraulic test, and the continuous abrasion during use with cylinder body can make gap increase and leak
Liquid causes pressure to reduce, can not normal use, therefore hardness to plunger and wearability and recoverability have higher want
It asks.General hydraulic test plunger is all made of but in heavy hydraulic equipment, stainless steel to be used to make plunger using stainless steel
It is to do piston body with carbon steel that can lead to way with high costs, common, and in carbon steel body outer cladding stainless steel sleeve, Ci Zhongfang
Although method can reduce cost, the compactness between stainless steel sleeve and carbon steel body can influence the mechanical property of plunger, therefore should
Method nor preferred plan.When making wearing layer on other field workpiece, martensitic stain less steel wearing layer is obtained using built-up welding,
But the martensitic structure residual stress generated is big, is also easy to produce cold crack, and as phosphorus content increases, tendency of hardenability increases, cold crack
Sensibility increases, therefore its bead-welding technology cannot be applied mechanically directly in plunger production.
Invention content
It is used the purpose of the present invention is to provide a kind of suitable heavy hydraulic equipment, in carbon steel body surface overlaying geneva
Body stainless steel, postwelding are not likely to produce cold crack, and overall cost is relatively low, and mechanical property is good while being easy to the plunger producer repaired
Method.
To achieve the purpose of the present invention, intend using following technical scheme：
A kind of production method of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel, including following implementation step
Suddenly：
1) No. 35 steel are used to make piston body；
2) it derusted, deoiled to piston body；
3) piston body is preheated using preheating furnace, preheating temperature is not less than 200 DEG C, is not higher than 450 DEG C, and in heap
It is kept the temperature during weldering；
4) built-up welding is carried out to piston body, specially using 2Cr13,3Cr13 or 4Cr13 stainless steel welding stick, solder flux is
SJ107 or HJ260, electric power polarity use DC reverse connection mode, welding current 280-300A, arc voltage 28-30V, weldering
Silk wire feed rate is 1.3-1.6m/min, and built-up welding speed is 550-650mm/min；Built-up welding is carried out using 2Cr13 stainless steel welding sticks
When, temperature is controlled at 200-350 DEG C, and when carrying out built-up welding using 3Cr13 stainless steel welding sticks, temperature is controlled at 250-400 DEG C, is used
When 4Cr13 stainless steel welding sticks carry out built-up welding, temperature is controlled at 300-450 DEG C.Since 2Cr13,3Cr13,4Cr13 martensite are stainless
The poor thermal conductivity of steel, postwelding easy to produce larger internal stress, slow this requires paying special attention to postwelding workpiece on bead-welding technology
It is cold, Slow cooling in preferably hot sand or preheating furnace.Due to the dilution of alloying element scaling loss and parent metal, deposited metal first
The alloying element loss of layer is maximum, and the second layer takes second place, and third layer loss is less.When using automatic submerged arc welding built-up welding, with built-up welding
Several increases, alloying element content become closer to the content of the alloying element in welding wire layer by layer.The built-up welding required in order to obtain
The ingredient of layer metal, loss of the element in weld deposit process is considered as when selecting alloy welding wire.To make built-up welding when submerged arc overlay welding
Layer reaches scheduled performance requirement, necessary three layers of the built-up welding of each plunger or more, specifically, 2000 tons or less hydraulic tests are used
Plunger, hardness requirement HRC45-50 degree, built-up welding two layers of 2Cr13, one layer of 3Cr13；2000 tons or more hydraulic test plungers, firmly
Degree requires HRC45-50 degree, three layers of 2Cr13 of built-up welding；2000 tons or less hydraulic test plungers, hardness ask HRC50 degree or more
, built-up welding two layers of 2Cr13, one layer of 4Cr13；2000 tons or more hydraulic test plungers, hardness ask HRC50 degree or more, built-up welding
One layer of 2Cr13, two layers of 3Cr13.
5) post weld heat treatment removes diffusible hydrogen in connector, while can also improve connector to eliminate welding residual stress
Tissue and performance；Specifically, for 3 layers of 2Cr13 stainless steels of built-up welding, using technique as shown in Figure 1；
For two layers of built-up welding, mono- layer of 2Cr13 3Cr13 stainless steels, two layers of 2Cr13, mono- layer of 4Cr13 stainless steel or one layer
Bis- layers of 3Cr13 stainless steels of 2Cr13, using technique as shown in Figure 2；
6) magnetic powder inspection is done, judges whether defect, if any fewer defects, then uses 2Cr13 stainless steel electrode reparations to polish；Such as
Defect is more than surface area 15%, then re-works rear built-up welding.
Preferably, the 2Cr13 stainless steel weld overlays thickness in monolayer is 2-2.5mm；2Cr13 stainless steel weld overlays
Transition zone is acted mainly as, only in 2000 tons or more hydraulic test plungers, hardness requirement HRC45-50 degree, 2Cr13 stainless steels
Overlay cladding can be used as face layer.
Preferably, the 3Cr13 stainless steel weld overlays thickness in monolayer is 2-2.5mm；3Cr13 stainless steel weld overlays
Face layer is acted mainly as, there is excellent wearability and recoverability, meets the requirement of plunger service life.
Preferably, the 4Cr13 stainless steel weld overlays thickness in monolayer is 2-2.5mm；4Cr13 stainless steel weld overlays,
With excellent wearability and recoverability, meet the requirement of plunger service life.
The invention has the advantages that make plunger bodies with No. 35 steel, and on straight carbon steel ontology built-up welding 2Cr13,
3Cr13 or 4Cr13 martensitic stain less steels are controlled using stringent built-up welding temperature, and three layers of martensite of built-up welding are not in plunger body
Become rusty steel, effectively prevent cold crack, cost is reduced while ensureing plunger hardness.
Description of the drawings
Fig. 1 is the post weld heat treatment artwork of 3 layers of 2Cr13 stainless steels of built-up welding；
Fig. 2 is two layers of built-up welding, mono- layer of 2Cr13 3Cr13 stainless steels, two layers of 2Cr13, mono- layer of 4Cr13 stainless steel or one layer
The post weld heat treatment artwork of bis- layers of 3Cr13 stainless steels of 2Cr13.
Specific implementation mode
Embodiment 1
1500 tons of hydraulic tests use, and hardness requirement HRC50 degree is with upper plug.Using following production method：
1) No. 35 steel are used to make piston body；
2) it derusted, deoiled to piston body；
3) piston body is preheated using preheating furnace, preheating temperature is 300 DEG C, and is kept the temperature in weld deposit process；
4) built-up welding is carried out to piston body, using 2 layers, overall thickness 4-4.5mm of 2Cr13 stainless steel welding sticks built-up welding, then made
1 layer of built-up welding, thickness 2.5mm are carried out with 4Cr13 stainless steel welding sticks.Solder flux is HJ260, and electric power polarity uses DC reverse connection side
Formula, welding current 280-300A, arc voltage 28V, welding wire feeding speed are 1.3m/min, and built-up welding speed is 550mm/
min；
5) post weld heat treatment removes diffusible hydrogen in connector, while can also improve connector to eliminate welding residual stress
Tissue and performance, technique specially as shown in Figure 2；
6) magnetic powder inspection is done, judges whether defect, if any fewer defects, then uses 2Cr13 stainless steel electrode reparations to polish；Such as
Defect is more than surface area 15%, then re-works rear built-up welding.
The plunger produced using the production method, the martensitic stain less steel of built-up welding are reached without cold crack, after tested hardness
HRC55 degree, overall cost are remarkably decreased, since with good recoverability, service life greatly prolongs.
Embodiment 2
2500 tons of hydraulic tests use, and hardness requirement HRC50 degree is with upper plug.Using following production method：
1) No. 35 steel are used to make piston body；
2) it derusted, deoiled to piston body；
3) piston body is preheated using preheating furnace, preheating temperature is 300 DEG C, and is kept the temperature in weld deposit process；
4) built-up welding is carried out to piston body, using 1 layer of 2Cr13 stainless steel welding sticks built-up welding, thickness 2mm reuses 3Cr13
Stainless steel welding stick carries out 2 layers of built-up welding, and thickness is overall thickness 4.5mm.Solder flux is HJ260, and electric power polarity uses DC reverse connection side
Formula, welding current 280-300A, arc voltage 28V, welding wire feeding speed are 1.4m/min, and built-up welding speed is 600mm/
min；
5) post weld heat treatment removes diffusible hydrogen in connector, while can also improve connector to eliminate welding residual stress
Tissue and performance, specific technique as shown in Figure 2；
6) magnetic powder inspection is done, judges whether defect, if any fewer defects, then uses 2Cr13 stainless steel electrode reparations to polish；Such as
Defect is more than surface area 15%, then re-works rear built-up welding.
The plunger produced using the production method, the martensitic stain less steel of built-up welding are reached without cold crack, after tested hardness
HRC56 degree, overall cost are remarkably decreased, since with good recoverability, service life greatly prolongs.
Embodiment 3
1500 tons of hydraulic tests use, the plunger of hardness requirement HRC45 degree.Using following production method：
1) No. 35 steel are used to make piston body；
2) it derusted, deoiled to piston body；
3) piston body is preheated using preheating furnace, preheating temperature is 300 DEG C, and is kept the temperature in weld deposit process；
4) built-up welding is carried out to piston body, using 2 layers, overall thickness 4-4.5mm of 2Cr13 stainless steel welding sticks built-up welding, then made
1 layer of built-up welding, thickness 2.5mm are carried out with 3Cr13 stainless steel welding sticks.Solder flux is HJ260, and electric power polarity uses DC reverse connection side
Formula, welding current 280-300A, arc voltage 28V, welding wire feeding speed are 1.5m/min, and built-up welding speed is 550mm/
min；
5) post weld heat treatment removes diffusible hydrogen in connector, while can also improve connector to eliminate welding residual stress
Tissue and performance, specific technique as shown in Figure 2；
6) magnetic powder inspection is done, judges whether defect, if any fewer defects, then uses 2Cr13 stainless steel electrode reparations to polish；Such as
Defect is more than surface area 15%, then re-works rear built-up welding.
The plunger produced using the production method, without cold crack, hardness reaches after tested wants the martensitic stain less steel of built-up welding
It asks, overall cost is remarkably decreased, since with good recoverability, service life greatly prolongs.
Embodiment 4
3000 tons of hydraulic tests use, the plunger of hardness requirement HRC45 degree.Using following production method：
1) No. 35 steel are used to make piston body；
2) it derusted, deoiled to piston body；
3) piston body is preheated using preheating furnace, preheating temperature is 300 DEG C, and is kept the temperature in weld deposit process；
4) built-up welding is carried out to piston body, uses 3 layers, overall thickness 6-6.5mm of 2Cr13 stainless steel welding sticks built-up welding, solder flux
For HJ107, electric power polarity uses DC reverse connection mode, welding current 280-300A, arc voltage 28V, welding wire feeding speed
Degree is 1.6m/min, and built-up welding speed is 600mm/min；
5) post weld heat treatment removes diffusible hydrogen in connector, while can also improve connector to eliminate welding residual stress
Tissue and performance, specific technique as shown in Figure 1；
6) magnetic powder inspection is done, judges whether defect, if any fewer defects, then uses 2Cr13 stainless steel electrode reparations to polish；Such as
Defect is more than surface area 15%, then re-works rear built-up welding.
The plunger produced using the production method, without cold crack, hardness reaches after tested wants the martensitic stain less steel of built-up welding
It asks, overall cost is remarkably decreased, since with good recoverability, service life greatly prolongs.
Claims (4)
1. a kind of production method of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel, including following implementation step
Suddenly：
1) No. 35 steel are used to make piston body；
2) it derusted, deoiled to piston body；
3) piston body is preheated using preheating furnace, preheating temperature is not less than 200 DEG C, is not higher than 450 DEG C, and in built-up welding
It is kept the temperature in journey；
4) to piston body carry out built-up welding, specially use 2Cr13,3Cr13 or 4Cr13 stainless steel welding stick, solder flux be SJ107 or
HJ260, electric power polarity use DC reverse connection mode, welding current 280-300A, arc voltage 28-30V, welding wire feeding speed
Degree is 1.3-1.6m/min, and built-up welding speed is 550-650mm/min；When carrying out built-up welding using 2Cr13 stainless steel welding sticks, temperature control
System is at 200-350 DEG C, and when carrying out built-up welding using 3Cr13 stainless steel welding sticks, temperature is controlled at 250-400 DEG C, stainless using 4Cr13
When steel welding wire carries out built-up welding, temperature is controlled at 300-450 DEG C；Each plunger must three layers of built-up welding or more, specifically, 2000 tons with
Lower hydraulic test plunger, hardness requirement HRC45-50 degree, built-up welding two layers of 2Cr13, one layer of 3Cr13；2000 tons or more hydraulic pressure
Equipment plunger, hardness requirement HRC45-50 degree, three layers of 2Cr13 of built-up welding；2000 tons or less hydraulic test plungers, hardness are asked
HRC50 degree or more, built-up welding two layers of 2Cr13, one layer of 4Cr13；2000 tons or more hydraulic test plungers, hardness seek HRC50 degree
Above, built-up welding one layer of 2Cr13, two layers of 3Cr13；
5) post weld heat treatment removes diffusible hydrogen in connector, while can also improve the tissue of connector to eliminate welding residual stress
And performance；Specifically, for 3 layers of 2Cr13 stainless steels of built-up welding, using technique as shown in Figure 1；
For two layers of built-up welding, mono- layer of 2Cr13 3Cr13 stainless steels, two layers of 2Cr13, mono- layer of 4Cr13 stainless steel or one layer of 2C,r13 bis-
Layer 3Cr13 stainless steels, using technique as shown in Figure 2；
6) magnetic powder inspection is done, judges whether defect, if any fewer defects, then uses 2Cr13 stainless steel electrode reparations to polish；Such as defect
More than surface area 15%, then rear built-up welding is re-worked.
2. a kind of producer of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel according to claim 1
Method, it is characterised in that：The 2Cr13 stainless steel weld overlays thickness in monolayer is 2-2.5mm.
3. a kind of producer of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel according to claim 1
Method, it is characterised in that：The 3Cr13 stainless steel weld overlays thickness in monolayer is 2-2.5mm.
4. a kind of producer of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel according to claim 1
Method, it is characterised in that：The 4Cr13 stainless steel weld overlays thickness in monolayer is 2-2.5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810651704.3A CN108581133A (en) | 2018-06-22 | 2018-06-22 | A kind of production method of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810651704.3A CN108581133A (en) | 2018-06-22 | 2018-06-22 | A kind of production method of heavy hydraulic equipment carbon steel plunger surface built-up welding martensitic stain less steel |
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| CN108581133A true CN108581133A (en) | 2018-09-28 |
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Citations (4)
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|---|---|---|---|---|
| US3895209A (en) * | 1974-02-06 | 1975-07-15 | Maruma Tractor & Equip | Metal build-up apparatus |
| CN101444881A (en) * | 2008-11-11 | 2009-06-03 | 大连新重集团有限公司 | Technology for repairing surfacing of piston rod of super large marine diesel engine |
| CN102189316A (en) * | 2010-03-11 | 2011-09-21 | 上海一钢机电有限公司 | Submerged-arc welding overlaying repairing method for stainless steel hot rolled delivery roll |
| CN105499751A (en) * | 2015-12-28 | 2016-04-20 | 湖北万安通复合再制造科技有限公司 | Hardfacing repair process used for hot continuous rolling pinch roll |
-
2018
- 2018-06-22 CN CN201810651704.3A patent/CN108581133A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895209A (en) * | 1974-02-06 | 1975-07-15 | Maruma Tractor & Equip | Metal build-up apparatus |
| CN101444881A (en) * | 2008-11-11 | 2009-06-03 | 大连新重集团有限公司 | Technology for repairing surfacing of piston rod of super large marine diesel engine |
| CN102189316A (en) * | 2010-03-11 | 2011-09-21 | 上海一钢机电有限公司 | Submerged-arc welding overlaying repairing method for stainless steel hot rolled delivery roll |
| CN105499751A (en) * | 2015-12-28 | 2016-04-20 | 湖北万安通复合再制造科技有限公司 | Hardfacing repair process used for hot continuous rolling pinch roll |
Non-Patent Citations (3)
| Title |
|---|
| 何树民等: "35000KN水压机主柱塞的埋弧自动焊", 《焊接与切割》 * |
| 李科等: "35钢堆焊不锈钢耐磨层的组织与性能", 《热加工工艺》 * |
| 王明中: "1800吨水压机主缸柱塞表面堆焊不锈钢", 《钢管技术》 * |
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Application publication date: 20180928 |
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