CN110434425A - A kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method - Google Patents
A kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method Download PDFInfo
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- CN110434425A CN110434425A CN201910585846.9A CN201910585846A CN110434425A CN 110434425 A CN110434425 A CN 110434425A CN 201910585846 A CN201910585846 A CN 201910585846A CN 110434425 A CN110434425 A CN 110434425A
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- welding
- fuel oil
- s60mc
- diesel engine
- cylinder cover
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying methods to be placed in high temperature furnace before the welding of S60MC cylinder cover for diesel engine fuel oil inlet zone and be heated to 300 DEG C；S60MC cylinder cover for diesel engine fuel oil inlet zone with computer temperature controller heater carries out supplementary heating after taking out out of high temperature furnace；S60MC cylinder cover for diesel engine fuel oil inlet zone is heated to 290-310 DEG C, and soaking time is no less than 2 hours, is come out of the stove and is placed on electric boiling plate, fixes thermocouple and protective ground wire, and be powered and keep the temperature in 150-220 DEG C；Fuel oil jeting area is welded: welding is connect using pulse gas-shielded welding or hand tungsten argon arc welding.The present invention provides a kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method, guarantees that weldquality is met the requirements, to show that reasonable welding procedure for production, guarantees product quality.
Description
Technical field
The present invention relates to Ship production technical fields, and in particular to a kind of S60MC cylinder cover for diesel engine fuel oil jeting area
Overlaying method.
Background technique
S20CrMoVs inconel is the main material of boat diesel engine S60ME-C8.2 cylinder head.S60ME-C8.2
Its interior cavity combustion chamber of cylinder cap, which has, needs the laminated golden material pile postwelding reprocessing of corrosionproof heatproof, corrosionproof heatproof layer alloy material at two
Technique for overlaying degree-of-difficulty factor is higher.
According to the product drawing that MAN B&W diesel engine company designs, in the cylinder cover oil spout of big cylinder-diameter diesel engine S60MC machine
Heap soldering high temperature resistant, corrosion resistant nichrome (Inconel 625) at hole, cylinder head body material are S17MoS forging, thickness
For 492mm, diameter 1097mm, in 625 corrosion resistant material of two sides built-up welding 6mm (finished size) Inconel.Due to the chromium nickel
Iron coating cylinder cap quality requirement is high and accurate, and the reliability service for host is vital.Therefore, MAN company requires chromium
Before the manufacturer of ferronickel coating cylinder cap permits supplier to produce the type cylinder cap, it is necessary to prove that their Weldability meets MAN
Company's correlated quality controls documentation requirements and approval: 1.MDT is qualified；2. surfacing layer metal Fe and Si chemical component ratio will meet
MAN0742804-4.12 code requirement；3. overlay cladding meets high temperature resistant, corrosion-resistant；Concrete norm is shown in 0743172-1.4, ability
It is allowed to the license supplier as chromium ferronickel cylinder cap coating cylinder cap.In order to forge into the domestic mating base of mid low speed diesel fuel machine,
The built-up welding research of cylinder cap corrosion and heat resistant alloy material must be carried out, convenient for Devoting Major Efforts To Developing S60ME-C8.2 cylinder cap and more large-diameter
Cylinder cap.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of S60MC cylinder cover for diesel engine fuel oil jeting area built-up welding side
Method is contained by the test of welding test block dilution property, hardness test and metallographic test, understanding metal ferro element in alloying process
Whether amount, the hardness of overlay cladding and metallographic structure meet product design requirement, and (ultrasonic wave is visited by the nondestructive inspection (NDI) to weld seam
Hurt UT and dye penetrant inspection PT), guarantee that weldquality is met the requirements, to show that reasonable welding procedure for production, is protected
Demonstrate,prove product quality.
Technical solution of the present invention is as follows:
A kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method, the described method comprises the following steps:
Before the welding of S1:S60MC cylinder cover for diesel engine fuel oil inlet zone, it is placed in high temperature furnace and is heated to 300 DEG C；
S2:S60MC cylinder cover for diesel engine fuel oil inlet zone is carried out after taking out out of high temperature furnace with computer temperature controller heater
Supplementary heating；
S3:S60MC cylinder cover for diesel engine fuel oil inlet zone is heated to 290-310 DEG C, and soaking time is no less than 2 hours, out
Furnace is placed on electric boiling plate, fixes thermocouple and protective ground wire, and be powered and keep the temperature in 150-220 DEG C；
S4: fuel oil jeting area is welded: welding is connect using pulse gas-shielded welding or hand tungsten argon arc welding；
Complete the built-up welding of S60MC cylinder cover for diesel engine fuel oil jeting area.
Preferably, the step S1: the S60MC cylinder cover for diesel engine fuel oil inlet zone material is S20CrMoVs, described
The solder wire material used in method belongs to 625 class of Inconel.
Preferably, the step S2: supplementary heating method is to be warming up to heating rate 40-60 degree/hour heating rate
145-155℃。
Preferably, the step S4: the gas that pulse gas-shielded welding uses is 85:15's for Ar and He by volume
Gaseous mixture, gas flow are 12~18L/min, weld the number of plies >=2 layer.
It is further preferred that pulse gas-shielded weld the mixing that the gas that uses is 85:15 for Ar and He by volume
Gas.
Preferably, the condition of the pulse gas-shielded welding of step S4 are as follows: welding current 160-220A；Arc voltage
26-32V；Speed of welding 20-35cm/min；Gas flow 15-20L/min；Temperature between road are as follows: first layer≤300 DEG C, the second layer
With third layer≤200 DEG C.
Preferably, the condition of the pulse gas-shielded welding of step S4 is specifically shown in Table 1:
Table 1
Preferably, the step S4 Manual argon-arc welding condition are as follows: welding current 100-180A；Welding
Speed 10-16cm/min；Gas flow 12-18L/min；Temperature between road are as follows: first layer≤300 DEG C, the second layer and third layer≤
200 DEG C, the gas that hand tungsten argon arc welding uses is Ar >=99.99%.
Preferably, the condition of the step S4 hand tungsten argon arc welding welding is specifically shown in Table 2:
Table 2
The present invention has the beneficial effect that:
1, using 80-90Ar:12-18He gas, it is desirable that impulse welding, the minimum number of plies of welding is 2 layers, guarantees final processing table
Face at least 2mm machined surface Fe constituent content≤10% below；Inconel thickness >=3mm；The highest hardness of thermal reaction area
≤450HV。
2, to the requirement of overlay cladding chemical analysis, the especially control of Fe element, improve and optimization it is practical, it is reasonable, can
Operational, economical and practical S20CrMoVs inconel bead-welding technology, meets welding quality and efficiency requirements；
3, test specimen is put into high temperature furnace first and is heated, be the heating rate 40- in order to guarantee test specimen according to code requirement
60 DEG C/h is preheated, and so that the test specimen is integrally preheated sufficiently, so that the stress for reducing steel generates；Test specimen is taken out out of high temperature furnace
Afterwards, and to connect intelligent temperature controller be preheating temperature >=150 DEG C in order to guarantee test specimen, because test specimen can be rapid after taking out out of furnace
150 DEG C are cooled to hereinafter, in order to improve the welding performance of material, it is necessary to assure preheating temperature >=150 DEG C of test specimen；It cannot be direct
It is because intelligent temperature controller heating is directly to rise by temperature quickly that temperature, which is heated to 300 DEG C, using intelligent temperature controller
, heating rate is too fast to be unable to control, at high temperature, influence of the nickel most vulnerable to sulphur, phosphorus, lead, tin, zinc, and however any formation is low
The element of melting eutectic be all it is harmful, it is even minimal amount of, embrittlement cause weld seam to the stress cracking of heat affected area.
4, according to the strong matching principle such as wlding and base material, S20CrMoVs base material selects 625 class wlding of Inconel, makes material
Expect that welding performance is more preferable, to obtain excellent weld(ing) deposit.
5, the step S2: supplementary heating method is to be warming up to 145- with heating rate 40-60 degree/hour heating rate
155℃.Guarantee that test plate (panel) obtains effectively preheating temperature, makes also to obtain effectively pre-heat effect inside test plate (panel), test plate (panel) is promoted to reach
Integrally pre-heat effect guarantees the cleannes of face of weld, to reduce the stress of steel, provides convenience for subsequent welding, promotees
Keep weld properties qualified.
6, the step S4: pulse gas-shielded to weld the mixing that the gas that uses is 85:15 for Ar and He by volume
Gas, gas flow are 15~20L/min, weld the number of plies >=2 layer.Gas ratio is suitable, can be guaranteed with effective protection welding pool
Weld metal fusion transition is good, prevents the defects of generating incomplete fusion, slag inclusion, stomata, to form qualified weld seam and guarantee
Good mechanical property.
7, the condition of the pulse gas-shielded welding of step S4 are as follows: welding current 160-220A；Arc voltage 26-
32V；Speed of welding 20-35cm/min；Gas flow 15-20L/min；Temperature between road are as follows: first layer≤300 DEG C, the second layer and
Third layer≤200 DEG C.Method for cleaning is to guarantee to obtain between reasonable welding condition and effective welding preparation and correct road
The necessary condition of qualified weld seam.
Detailed description of the invention
Fig. 1 cylinder cap corrosionproof heatproof layer heap of the present invention welds welding region schematic diagram；
Schematic diagram is integrally preheated in Fig. 2 S20CrMoVS inconel test plate (panel) furnace；
Fig. 3 S20CrMoVS inconel test plate (panel) intelligent temperature controller auxiliary heating schematic diagram；
Fig. 4 welding method operation chart: wherein Fig. 4 a GMAW-P is welded, Fig. 4 b GTAW welding；
Fig. 5 test plate (panel) welding bead and weld seam layer distribution map；
Fig. 6 UT flaw detection operation chart；
Fig. 7 PT flaw detection operation chart；
Fig. 8 side bend test schematic diagram；
The microcosmic metallographic of the pulse gas-shielded weldering (GMAW-P) of Fig. 9；
The microcosmic metallographic of Figure 10 hand tungsten argon arc welding (GTAW)；
Specific embodiment
The present invention is further illustrated below with reference to embodiment, but the scope of protection of present invention is not limited to implement
The range of example statement.
The requirement of 3 cylinder cap built-up welding steel plate chemical element of table
Embodiment 1
A kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method, the described method comprises the following steps:
Before the welding of S1:S60MC cylinder cover for diesel engine fuel oil inlet zone, it is placed in high temperature furnace and is heated to 300 DEG C；
S2:S60MC cylinder cover for diesel engine fuel oil inlet zone is carried out after taking out out of high temperature furnace with computer temperature controller heater
Supplementary heating；
S3:S60MC cylinder cover for diesel engine fuel oil inlet zone is heated to 290-310 DEG C, and soaking time is no less than 2 hours, out
Furnace is placed on electric boiling plate, fixes thermocouple and protective ground wire, and be powered and keep the temperature in 150-220 DEG C；
S4: fuel oil jeting area is welded: welding is connect using pulse gas-shielded welding or hand tungsten argon arc welding；
Complete the built-up welding of S60MC cylinder cover for diesel engine fuel oil jeting area.
Preferably, the step S1: the S60MC cylinder cover for diesel engine fuel oil inlet zone material is S20CrMoVs, described
The solder wire material used in method belongs to 625 class of Inconel.
Preferably, the step S2: supplementary heating method is to be warming up to heating rate 40-60 degree/hour heating rate
145-155℃。
Preferably, the step S4: the gas that pulse gas-shielded welding uses is 85:15's for Ar and He by volume
Gaseous mixture, gas flow are 15~20L/min, weld the number of plies >=2 layer.
Preferably, the condition of the pulse gas-shielded welding of step S4 are as follows: welding current 160-220A；Arc voltage
26-32V；Speed of welding 20-35cm/min；Gas flow 15-20L/min；Temperature between road are as follows: first layer≤300 DEG C, the second layer
With third layer≤200 DEG C.
Preferably, the condition of the pulse gas-shielded welding of step S4 is specifically shown in Table 4:
Table 4
Pulse gas-shielded weldering built-up welding test plate (panel) built-up welding steel plate chemical element is shown in Table 5:
Table 5
| Test piece number (Test pc No.) | Si | Fe | Cr | Ni | Mo |
| 2018-114-1 | 0.10 | 1.21 | 21.37 | 64.0 | 9.13 |
| 2018-114-2 | 0.10 | 6.32 | 20.48 | 60.6 | 8.52 |
| 2018-114-3 | 0.10 | 5.13 | 20.95 | 61.1 | 8.64 |
| 2018-114-4-1 | 0.11 | 14.50 | 19.03 | 55.0 | 7.72 |
| 2018-114-4-2 | 0.11 | 15.46 | 18.67 | 54.5 | 7.63 |
| 2018-114-4-3 | 0.11 | 17.55 | 18.21 | 53.3 | 7.43 |
| 2018-114-5 | 0.29 | Base | 1.02 | 0.20 | 0.44 |
| 2018-114-6 | 0.20 | Base | 0.95 | 0.07 | 0.40 |
Macroscopical metallographic:
Process after 2 pairs of samples polish on sample grinding machine, corroded as required, do not find crackle, stomata, incomplete fusion,
Lack of penetration equal shortcoming, is shown in Fig. 9.
Hardness
Table 6
| Position | Base material | Heat affected area highest hardness | Heat affected area width | Wlding |
| Hardness HV10 | 221 | 292 | 3.0mm | 260 |
By table 3-4 it is found that S20CrMoVs material carries out the examination of built-up welding using the pulse gas-shielded weldering of 85%Ar+15%He
Part, all data obtained by chemical composition analysis and hardness test meet MAN 0742804-4.12 code requirement, because
This this technique is qualified and can apply in actual production.
Embodiment 2
A kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method, the described method comprises the following steps:
Before the welding of S1:S60MC cylinder cover for diesel engine fuel oil inlet zone, it is placed in high temperature furnace and is heated to 300 DEG C；
S2:S60MC cylinder cover for diesel engine fuel oil inlet zone is carried out after taking out out of high temperature furnace with computer temperature controller heater
Supplementary heating；
S3:S60MC cylinder cover for diesel engine fuel oil inlet zone is heated to 290-310 DEG C, and soaking time is no less than 2 hours, out
Furnace is placed on electric boiling plate, fixes thermocouple and protective ground wire, and be powered and keep the temperature in 150-220 DEG C；
S4: fuel oil jeting area is welded: welding is connect using pulse gas-shielded welding or hand tungsten argon arc welding；
Complete the built-up welding of S60MC cylinder cover for diesel engine fuel oil jeting area.
Preferably, the step S1: the S60MC cylinder cover for diesel engine fuel oil inlet zone material is S20CrMoVs, described
The solder wire material used in method belongs to 625 class of Inconel.
Preferably, the step S2: supplementary heating method is to be warming up to heating rate 40-60 degree/hour heating rate
145-155℃。
Preferably, the step S4 Manual argon-arc welding condition are as follows: welding current 100-180A；Welding
Speed 10-16cm/min；Gas flow 12-18L/min；Temperature between road are as follows: first layer≤300 DEG C, the second layer and third layer≤
200℃。
Preferably, the condition of the step S4 hand tungsten argon arc welding welding is specifically shown in Table 7:
Table 7
Hand tungsten argon arc welding test plate (panel) chemical composition analysis result:
Table 8
Macroscopical metallographic:
Process after 2 pairs of samples polish on sample grinding machine, corroded as required, do not find crackle, stomata, incomplete fusion,
Lack of penetration equal shortcoming, is shown in Figure 10.
Hardness
Table 9
By table 8-9 it is found that S20CrMoVs material carries out the test specimen of built-up welding, warp using 99.99%Ar hand tungsten argon arc welding
It crosses chemical composition analysis and all data that hardness test obtains meets MAN 0742804-4.12 code requirement, therefore this
Technique is qualified and can apply in actual production.
Claims (8)
1. a kind of S60MC cylinder cover for diesel engine fuel oil jeting area overlaying method, which is characterized in that the method includes following steps
It is rapid:
Before the welding of S1:S60MC cylinder cover for diesel engine fuel oil inlet zone, it is placed in high temperature furnace and is heated to 300 DEG C；
S2:S60MC cylinder cover for diesel engine fuel oil inlet zone is supplemented after taking out out of high temperature furnace with computer temperature controller heater
Heating；
S3:S60MC cylinder cover for diesel engine fuel oil inlet zone is heated to 290-310 DEG C, and soaking time is no less than 2 hours, comes out of the stove and puts
It sets on electric boiling plate, fixes thermocouple and protective ground wire, and be powered and keep the temperature in 150-220 DEG C；
S4: fuel oil jeting area is welded: welding is connect using pulse gas-shielded welding or hand tungsten argon arc welding；
Complete the built-up welding of S60MC cylinder cover for diesel engine fuel oil jeting area.
2. the method according to claim 1, wherein the step S1: the S60MC cylinder cover for diesel engine fuel oil
Inlet zone material is S20CrMoVs, and the solder wire material used in the method belongs to 625 class of Inconel.
3. the method according to claim 1, wherein the step S2: supplementary heating method is with heating rate
40-60 degree/hour heating rate is warming up to 145-155 DEG C.
4. the method according to claim 1, wherein the step S4: the gas that pulse gas-shielded welding uses
Body is Ar and He is the gaseous mixture of 85:15 by volume, and gas flow is 15~20L/min, welds the number of plies >=2 layer.
5. according to the method described in claim 4, it is characterized in that, the condition of the pulse gas-shielded welding of step S4 are as follows:
Welding current is 160-220A；Arc voltage 26-32V；Speed of welding 20-35cm/min；Gas flow 15-20L/min；Between road
Temperature are as follows: first layer≤300 DEG C, the second layer and third layer≤200 DEG C.
6. according to the method described in claim 5, it is characterized in that, the condition of the pulse gas-shielded welding of step S4 is specific
It is shown in Table 1:
Table 1
7. the method according to claim 1, wherein the step S4 Manual argon-arc welding condition
Are as follows: welding current 100-180A；Speed of welding 10-16cm/min；Gas flow 12-18L/min；Temperature between road are as follows: first
Layer≤300 DEG C, the second layer and third layer≤200 DEG C, the gas that hand tungsten argon arc welding uses are Ar >=99.99%.
8. the method according to the description of claim 7 is characterized in that the condition tool of step S4 hand tungsten argon arc welding welding
Body is shown in Table 2:
Table 2
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| CN201910585846.9A CN110434425B (en) | 2019-07-01 | 2019-07-01 | Surfacing welding method for fuel injection area of cylinder head of S60MC diesel engine |
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