CN105345242A - Plasma spray welding process for shaft sleeve hard facing layer of nuclear main pump motor - Google Patents
Plasma spray welding process for shaft sleeve hard facing layer of nuclear main pump motor Download PDFInfo
- Publication number
- CN105345242A CN105345242A CN201510875279.2A CN201510875279A CN105345242A CN 105345242 A CN105345242 A CN 105345242A CN 201510875279 A CN201510875279 A CN 201510875279A CN 105345242 A CN105345242 A CN 105345242A
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- welding
- axle sleeve
- main pump
- pump motor
- plasma spray
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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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up welding
Abstract
The invention relates to a plasma spray welding process for a shaft sleeve hard facing layer of a nuclear main pump motor, in particular to a surfacing process for the shaft sleeve hard facing layer, made of four alloys, of a key component of the nuclear main pump motor. By inventing novel workpiece heating and heat-preservation measures and determining the proper plasma spray welding process parameters, surfacing of the shaft sleeve large-area cobalt-base alloy hard facing layer of the nuclear main pump motor is completed, and the design requirements are met. The achievement has high application value on the aspect of engineering, and has deep social significance.
Description
Technical field: the present invention relates to a kind of core main pump motor axle sleeve stiffening layer plasma spray welding technology.
Background technology: reactor coolant pump is the extremely crucial equipment of nuclear island of nuclear power station.Axle sleeve is the epitrochanterian important rotatable parts of main pump motor, and during electric machine rotation, axle sleeve and bearing shell carry out spin friction, rigorous service condition: HTHP, contact with WATER AS FLOW MEDIUM, strong neutron irradiation, alternate load etc., reach 60 years running time.Therefore axle sleeve forming manufacture technique becomes the key technology in main pump shield electric machine manufacture link.Plasma spray occurs for 20 end of the centurys and develop rapidly surfacecti proteon and reinforcement technique, have dilution rate low, be out of shape the features such as little, beautiful appearance, steady quality, therefore the built-up welding of axle sleeve stiffening layer adopts the method for plasma spray.But conventional built-up welding product base material is generally stainless steel or carbon steel material, and core main pump motor axle sleeve selects alloy four forging to be base material for ensureing motor service life and reliability, this kind of base material adopts plasma spray Co-based alloy powder to belong to new application at home.The selection of Co-based alloy powder is also had any different with conventional products, its Co-based alloy powder is more strict on the basis of the too vertical 12 cobalt-base alloys compositions of department defines Fe, Ni, elements such as w content, optimizes the corrosion protection ability of overlay cladding meeting on its anti abrasive serviceability basis.Because the change of base material and powdered ingredients causes traditional plasma spray welding technology cannot meet the requirement of new product.
Summary of the invention: the object of the invention is uniformity and the higher requirement of holding temperature for meeting the heating of axle sleeve entirety, improving built-up welding success rate a kind of core main pump motor axle sleeve stiffening layer plasma spray welding technology is provided.Technical scheme of the present invention is: a kind of core main pump motor axle sleeve stiffening layer plasma spray welding technology: (1) axle sleeve material: nickel-chromium-ferro alloy, standard No. ASTMB564UNSN06600, specification: Φ 410mm*465mm*41mm; Fill the metal dust trade mark: cobalt-base alloys welding powder Co112FY, specification: 60-200 order;
(2) welding parameter: welding current: 170 ?200A, weldingvoltage 23 ?26V, speed of welding 50 ?100mm/min, hunting frequency 28 ?30 times/min; Protection gas: 99.999%Ar, gas flow 15 ?20L/min, ion-gas: 99.999%Ar, gas flow 1 ?4L/min, powder feeding gas: 99.99%He, gas flow: 2 ?5L/min; Polarity: straight polarity direct current; Welding position: downhand welding; Powder feed rate: 26 ?35g/min; Welding bead pattern: spiral; The welding number of plies: 2 layers;
(3) welding procedure:
A) assemble, be assembled on positioner after the axle sleeve forging being worked into size is cleared up, after using the scroll chuck on positioner to be fixed by axle sleeve clamping from inner side, then locking device is locked.
B) preheating, before ground floor built-up welding, needs to carry out overall preheating to axle sleeve, and preheat temperature need higher than 300 DEG C, and preheating uses assisted heating device to implement, and is heated by the radiant heat of electric blanket and propane flame heat two kinds of mode of heatings to axle sleeve simultaneously; In warm by positioner be axle sleeve rotate be heated;
C) weld, weld by above-mentioned parameter, according to electric arc and molten bath situation trim voltage, the distance between welding gun and workpiece can be controlled in welding process; Arc length automatic control function ALC is added in welding control system, when deviation when between virtual voltage and setting voltage is greater than 0.1V, automatic adjustment welding gun height, corrects the deviation of voltage, makes welding gun and workpiece remain at the fixed range of expection by this function;
D) temperature in welding process controls, adopt auxiliary heating instrument, adopt the mode that electrical heating and propane flame heat combine, sleeve outer surface 60% area is surrounded by electric heater unit, ensured the bulk temperature of shaft sleeve workpiece by the radiant heat of electric blanket, then realized workpiece partial temperature control by the direction and intensity of adjustment flame heating;
E) the axle sleeve postwelding type of cooling: welded rear plug and drawn blanket entirety parcel axle sleeve, carried out slow cooling, until axle sleeve is cooled to room temperature;
F) second layer built-up welding, re-start the overall preheating of axle sleeve before welding, preheat temperature higher than 400 DEG C, then need repeat step c) to step e) carry out welding and postheating, complete the welding of second layer overlay cladding.
Core main pump motor axle sleeve stiffening layer plasma spraying welding equipment: plasma spray welding gun (3) and powder feeder (2) are fixed on the slide plate of manipulator (1) crossbeam, axle sleeve (4) clamps fixing by the chuck on fixing positioner (5) turntable from inner side, locking device (6) is by sleeve end sealing locking, the composition of auxiliary heating instrument has the electric blanket of two pieces of arcs (7) to be placed on heat-barrier material plug to draw on blanket (8), the electric blanket (7) of two pieces of arcs is fixed on adjustable support (9), axle sleeve side fixes two handle grilled gun supports (11) side by side, at upper installation two handle propane grilled gun (10) of grilled gun support (11).
The technology of the present invention effect:
A) locking device, come off from positioner chuck after can effectively preventing axle sleeve expanded by heating, simultaneously due in locking device end plate side bonds one deck plug draw blanket insulation material, the heat-insulating and sealing to bore sleeve can be realized, reduce heat losses, improve integral heat insulation effect;
B) assisted heating device, axle sleeve is heated by the radiant heat of electric blanket and propane flame heat two kinds of mode of heatings simultaneously, the wherein cover type heating of electric blanket, heating surface (area) (HS is large, uniformity is good, and reduce axle sleeve greatly to the heat losses in air, improve the efficiency of heating surface greatly; Therefore in weld preheating process the single heating mode of more conventional flame or electric heating to have the rate of heat addition fast, the uniformity of heating and the good advantage of heat penetration; In welding process, ensured the bulk temperature of shaft sleeve workpiece by the radiant heat of electric blanket, also have that eliminating upwards flows with hot-air causes cold air to suck below axle sleeve to produce dysgenic effect to the uniformity of workpiece temperature simultaneously; The rapid rising of workpiece welding position local temperature can be caused owing to increasing arc heat input in welding process.
Traditional heating mode causes overlay cladding to ftracture because local temperature difference is excessive, this technique can according to the flame angle of two handle propane grilled guns in welding gun advanced positions adjustment auxiliary heating instrument and heating location, temperature-compensating is carried out by flame heating to there is no the position of thermal weld stress, realize the control to axle sleeve bulk temperature, ensure the consistent of axle sleeve bulk temperature;
C) in welding control system, add arc length automatic control function ALC, when deviation when between virtual voltage and setting voltage is greater than 0.1V, automatic adjustment welding gun height, correct the deviation of voltage, welding gun and workpiece is made to remain at the fixed range of expection by this function, namely ensure the stability that welding bead is shaping, in turn simplify operation;
D) welded rear plug and drawn blanket entirety parcel axle sleeve, realized shaft sleeve workpiece Slow cooling, instead of the method that conventional built-up welding uses heat-treatment furnace to cool with stove, have easy to operate, the advantage of good cooling results.
Accompanying drawing explanation
Fig. 1: axle sleeve plasma spray schematic diagram
Fig. 2: auxiliary heating instrument schematic diagram
Detailed description of the invention:
A kind of core main pump motor axle sleeve stiffening layer plasma spray welding technology, (1) axle sleeve material: nickel-chromium-ferro alloy, standard No. ASTMB564UNSN06600, specification: Φ 410mm*465mm*41mm; Fill the metal dust trade mark: cobalt-base alloys welding powder Co112FY, specification: 60-200 order;
(2) welding parameter: welding current: 170 ?200A, weldingvoltage 23 ?26V, speed of welding 50 ?100mm/min, hunting frequency 28 ?30 times/min; Protection gas: 99.999%Ar, gas flow 15 ?20L/min, ion-gas: 99.999%Ar, gas flow 1 ?4L/min, powder feeding gas: 99.99%He, gas flow: 2 ?5L/min; Polarity: straight polarity direct current; Welding position: downhand welding; Powder feed rate: 26 ?35g/min; Welding bead pattern: spiral; The welding number of plies: 2 layers;
(3) welding procedure:
A) assemble, be assembled on positioner after the axle sleeve forging being worked into size is cleared up, after using the scroll chuck on positioner to be fixed by axle sleeve clamping from inner side, then locking device is locked.
B) preheating, before ground floor built-up welding, needs to carry out overall preheating to axle sleeve, and preheat temperature need higher than 300 DEG C, and preheating uses assisted heating device to implement, and is heated by the radiant heat of electric blanket and propane flame heat two kinds of mode of heatings to axle sleeve simultaneously; In warm by positioner be axle sleeve rotate be heated;
C) weld, weld by above-mentioned parameter, according to electric arc and molten bath situation trim voltage, the distance between welding gun and workpiece can be controlled in welding process; Arc length automatic control function ALC is added in welding control system, when deviation when between virtual voltage and setting voltage is greater than 0.1V, automatic adjustment welding gun height, corrects the deviation of voltage, makes welding gun and workpiece remain at the fixed range of expection by this function;
D) temperature in welding process controls, adopt auxiliary heating instrument, adopt the mode that electrical heating and propane flame heat combine, sleeve outer surface 60% area is surrounded by electric heater unit, ensured the bulk temperature of shaft sleeve workpiece by the radiant heat of electric blanket, then realized workpiece partial temperature control by the direction and intensity of adjustment flame heating;
E) the axle sleeve postwelding type of cooling: welded rear plug and drawn blanket entirety parcel axle sleeve, carried out slow cooling, until axle sleeve is cooled to room temperature;
F) second layer built-up welding, re-start the overall preheating of axle sleeve before welding, preheat temperature higher than 400 DEG C, then need repeat step c) to step e) carry out welding and postheating, complete the welding of second layer overlay cladding.
A kind of core main pump motor axle sleeve stiffening layer plasma spraying welding equipment as shown in Figure 1: plasma spray welding gun 3 and powder feeder 2 are fixed on the slide plate of manipulator 1 crossbeam, axle sleeve 4 clamps fixing by the chuck on fixing positioner 5 turntable from inner side, locking device 6 is by sleeve end sealing locking, as shown in Figure 2, the composition of auxiliary heating instrument has the electric blanket 7 of two pieces of arcs to be placed on heat-barrier material plug to draw on blanket 8, the electric blanket 7 of two pieces of arcs is fixed on adjustable support 9, axle sleeve side fixes two handle grilled gun supports 11 side by side, grilled gun support 11 is installed two handle propane grilled guns 10.
Plasma spray welding gun and powder feeder are fixed on the slide plate of manipulator crossbeam, axle sleeve is fixing from inner side clamping by the chuck be fixed on positioner turntable, by locking device, sleeve end sealing is locked again, locking device is made up of the pull bar be fixed on positioner turntable and end plate, blanket is drawn to seal at end plate and sleeve member plug, locking device can play the double action of fixed hub and thermal-insulating sealing, the heating partial of assisted heating device is placed on heat-barrier material plug by the electric blanket of two pieces of arcs and draws on blanket, the electric blanket of two pieces of arcs is fixed on adjustable support, support by adjusting electric blanket controls the distance of electric blanket to axle sleeve, the entirety realizing temperature controls, the flame heating part of assisted heating device is fixed two handle propane grilled guns by axle sleeve side and is formed, grilled gun is placed on grilled gun support, by direction and the position of the heating of adjustment grilled gun support adjustment flame.
Claims (2)
1. a core main pump motor axle sleeve stiffening layer plasma spray welding technology, is characterized in that: (1) axle sleeve material: nickel-chromium-ferro alloy, standard No. ASTMB564UNSN06600, specification: Φ 410mm*465mm*41mm; Fill the metal dust trade mark: cobalt-base alloys welding powder Co112FY, specification: 60-200 order;
(2) welding parameter: welding current: 170 ?200A, weldingvoltage 23 ?26V, speed of welding 50 ?100mm/min, hunting frequency 28 ?30 times/min; Protection gas: 99.999%Ar, gas flow 15 ?20L/min, ion-gas: 99.999%Ar, gas flow 1 ?4L/min, powder feeding gas: 99.99%He, gas flow: 2 ?5L/min; Polarity: straight polarity direct current; Welding position: downhand welding; Powder feed rate: 26 ?35g/min; Welding bead pattern: spiral; The welding number of plies: 2 layers;
(3) welding procedure:
A) assemble, be assembled on positioner after the axle sleeve forging being worked into size is cleared up, after using the scroll chuck on positioner to be fixed by axle sleeve clamping from inner side, then locking device is locked.
B) preheating, before ground floor built-up welding, needs to carry out overall preheating to axle sleeve, and preheat temperature need higher than 300 DEG C, and preheating uses assisted heating device to implement, and is heated by the radiant heat of electric blanket and propane flame heat two kinds of mode of heatings to axle sleeve simultaneously; In warm by positioner be axle sleeve rotate be heated;
C) weld, weld by above-mentioned parameter, according to electric arc and molten bath situation trim voltage, the distance between welding gun and workpiece can be controlled in welding process; Arc length automatic control function ALC is added in welding control system, when deviation when between virtual voltage and setting voltage is greater than 0.1V, automatic adjustment welding gun height, corrects the deviation of voltage, makes welding gun and workpiece remain at the fixed range of expection by this function;
D) temperature in welding process controls, adopt auxiliary heating instrument, adopt the mode that electrical heating and propane flame heat combine, sleeve outer surface 60% area is surrounded by electric heater unit, ensured the bulk temperature of shaft sleeve workpiece by the radiant heat of electric blanket, then realized workpiece partial temperature control by the direction and intensity of adjustment flame heating;
E) the axle sleeve postwelding type of cooling: welded rear plug and drawn blanket entirety parcel axle sleeve, carried out slow cooling, until axle sleeve is cooled to room temperature;
F) second layer built-up welding, re-start the overall preheating of axle sleeve before welding, preheat temperature higher than 400 DEG C, then need repeat step c) to step e) carry out welding and postheating, complete the welding of second layer overlay cladding.
2. a core main pump motor axle sleeve stiffening layer plasma spraying welding equipment: it is characterized in that: plasma spray welding gun (3) and powder feeder (2) are fixed on the slide plate of manipulator (1) crossbeam, axle sleeve (4) clamps fixing by the chuck on fixing positioner (5) turntable from inner side, locking device (6) is by sleeve end sealing locking, the composition of auxiliary heating instrument has the electric blanket of two pieces of arcs (7) to be placed on heat-barrier material plug to draw on blanket (8), the electric blanket (7) of two pieces of arcs is fixed on adjustable support (9), axle sleeve side fixes two handle grilled gun supports (11) side by side, at upper installation two handle propane grilled gun (10) of grilled gun support (11).
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| CN201510875279.2A CN105345242B (en) | 2015-12-03 | 2015-12-03 | Core main pump motor axle sleeve stiffening layer plasma spray welding technology |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728922A (en) * | 2016-04-18 | 2016-07-06 | 华能国际电力股份有限公司 | Method suitable for plasma spray welding of nickel-based alloy powder on boiler pipeline |
| CN107283020A (en) * | 2017-08-17 | 2017-10-24 | 安徽卓煌机械设备有限公司 | A kind of clinker breaker roll roll surface heats prosthetic device |
| CN108161194A (en) * | 2017-12-25 | 2018-06-15 | 武汉理工大学 | A kind of plasma surfacing restorative procedure of drawing block |
| CN108907426A (en) * | 2018-07-13 | 2018-11-30 | 沈阳鼓风机集团核电泵业有限公司 | A kind of plasma arc bead welding method of nuclear power carbide alloy of nickel-base |
| CN109514058A (en) * | 2018-11-23 | 2019-03-26 | 东方电气集团东方汽轮机有限公司 | A kind of anti-water erosion processing method of last stage vane of steam turbine |
| CN110529492A (en) * | 2019-09-05 | 2019-12-03 | 潍坊市宇宏石油机械有限公司 | A kind of novel transverse bearing body and its production technology |
| CN111545884A (en) * | 2020-05-26 | 2020-08-18 | 南通市力沛流体阀业有限公司 | F92 flashboard sealing surface plasma spray welding method |
| CN113458594A (en) * | 2021-07-22 | 2021-10-01 | 哈尔滨电气动力装备有限公司 | Welding method for nuclear main pump centering block laser deposited cobalt-based alloy powder |
| CN113664347A (en) * | 2021-09-29 | 2021-11-19 | 江苏神通核能装备有限公司 | Plasma arc surfacing method for surface of sphere |
| CN113909656A (en) * | 2021-12-10 | 2022-01-11 | 东方法马通核泵有限责任公司 | Surfacing process and surfacing method for main pump shaft seal matching part |
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Cited By (12)
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| CN105728922A (en) * | 2016-04-18 | 2016-07-06 | 华能国际电力股份有限公司 | Method suitable for plasma spray welding of nickel-based alloy powder on boiler pipeline |
| CN107283020A (en) * | 2017-08-17 | 2017-10-24 | 安徽卓煌机械设备有限公司 | A kind of clinker breaker roll roll surface heats prosthetic device |
| CN107283020B (en) * | 2017-08-17 | 2019-12-03 | 江西银杉白水泥股份有限公司 | A kind of clinker breaker roll roll surface heating prosthetic device |
| CN108161194A (en) * | 2017-12-25 | 2018-06-15 | 武汉理工大学 | A kind of plasma surfacing restorative procedure of drawing block |
| CN108907426A (en) * | 2018-07-13 | 2018-11-30 | 沈阳鼓风机集团核电泵业有限公司 | A kind of plasma arc bead welding method of nuclear power carbide alloy of nickel-base |
| CN109514058A (en) * | 2018-11-23 | 2019-03-26 | 东方电气集团东方汽轮机有限公司 | A kind of anti-water erosion processing method of last stage vane of steam turbine |
| CN110529492A (en) * | 2019-09-05 | 2019-12-03 | 潍坊市宇宏石油机械有限公司 | A kind of novel transverse bearing body and its production technology |
| CN111545884A (en) * | 2020-05-26 | 2020-08-18 | 南通市力沛流体阀业有限公司 | F92 flashboard sealing surface plasma spray welding method |
| CN113458594A (en) * | 2021-07-22 | 2021-10-01 | 哈尔滨电气动力装备有限公司 | Welding method for nuclear main pump centering block laser deposited cobalt-based alloy powder |
| CN113458594B (en) * | 2021-07-22 | 2022-10-11 | 哈尔滨电气动力装备有限公司 | Welding method for nuclear main pump centering block laser deposited cobalt-based alloy powder |
| CN113664347A (en) * | 2021-09-29 | 2021-11-19 | 江苏神通核能装备有限公司 | Plasma arc surfacing method for surface of sphere |
| CN113909656A (en) * | 2021-12-10 | 2022-01-11 | 东方法马通核泵有限责任公司 | Surfacing process and surfacing method for main pump shaft seal matching part |
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