CN104117783B - Welding material and preparation method thereof - Google Patents
Welding material and preparation method thereof Download PDFInfo
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- CN104117783B CN104117783B CN201410352800.XA CN201410352800A CN104117783B CN 104117783 B CN104117783 B CN 104117783B CN 201410352800 A CN201410352800 A CN 201410352800A CN 104117783 B CN104117783 B CN 104117783B
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
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Abstract
The invention discloses a welding material and a preparation method of the welding material. The welding material contains, by mass, 25 parts to 30 parts of W, 43 parts to 55 parts of Mo, 8 parts to 10 parts of Co, 3 parts to 5 parts of Fe, and 1 part to 2 parts of at least one of Ti, V, Ru and Re. The preparation method includes the steps that ethyl alcohol is added into the raw materials, the mixture is fully ground and then dried in argon, a lubricating agent is added into the raw materials, the mixture is evenly mixed for warm-pressing forming, and finally the lubricating agent is removed through hydrogen presintering. The welding material is particularly suitable for welding between alloy steel and tungsten electrodes, the homogeneity of the two materials can be improved, the interface strength is increased, and the durability of the tungsten electrodes at work is guaranteed. Compared with conventional tungsten electrodes, the cost of the welded tungsten electrodes is reduced, the original welding performance of the welded tungsten electrodes can be kept, the welded tungsten electrodes are high in interface strength, good in arcing performance and static characteristic of arc, resistant to high-temperature creep and thermal ablation and capable of replacing the conventional tungsten electrodes under various working conditions.
Description
Technical field
The invention belongs to rare metal granite field of welding material, it is related to a kind of welding material and preparation method thereof.
Background technology
Welding procedure is a kind of manufacturing process with mode of heating jointing metal or other thermoplastics such as plastics and skill
Art.Different welding methods has different welding procedures and welding material.Welding material mainly material, the change according to welded piece
Study point, weldment structure type, welding performance requires to determine.
The seam of two connected bodies of connection being formed during welding is referred to as weld seam (or interface).The both sides of interface are in welding
Welding heat effect can be subject to, and tissue and performance change occur, this region is referred to as heat affected area.Because of workpiece material during welding
The differences such as material, welding material, welding current, postwelding Seam and heat effected zone may produce overheated, brittle, harden or soften existing
As also making weldment hydraulic performance decline, deteriorating weldability.This is accomplished by adjusting welding condition, before weldering when the preheating of butt-welding fitting interface, weldering
Insulation and post weld heat treatment can improve the welding quality of weldment.
In actual use, due to needing to clamp, electrode bar rear end often has 3 ~ 5cm using less than making to tungsten electrode
Become the significant wastage of material and the increase of use cost.Therefore tungsten electrode bar end 3 ~ 5cm can be changed into other cheap materials,
As cr-w-mo-v steel alloy, processing and the use cost of tungsten electrode will be substantially reduced, save a large amount of tungsten resources and rare earth resources.
But could tungsten electrode can be entered at high temperature with cr-w-mo-v steel alloy using which type of welding material and welding procedure
The complete welding of row, can guarantee that the high intensity of interface and the superperformance of weldment again, is current urgent problem.
Content of the invention
It is an object of the invention to provide a kind of welding material.
Another object of the present invention is to providing a kind of preparation method of welding material.
The technical solution used in the present invention is:
A kind of welding material, it is made up of the raw material of following mass fraction: 25 ~ 30 parts of w, 43 ~ 55 parts of mo, 8 ~ 10 parts of ni, and 8
~ 10 parts of co, 3 ~ 5 parts of fe, at least one in 1 ~ 2 part of ti, v, ru, re.
Further, the particle diameter of above-mentioned raw materials w is 20 ~ 800 m, and the particle diameter of mo is 10 ~ 500 m, ni, co, fe, ti,
The particle diameter of v, ru, re stands alone as 10 ~ 400 m.
A kind of preparation method of welding material, comprises the following steps:
1) weigh the material powder of following mass parts: 25 ~ 30 parts of w, 43 ~ 55 parts of mo, 8 ~ 10 parts of ni, 8 ~ 10 parts of co, 3 ~ 5 parts
Fe, at least one in 1 ~ 2 part of ti, v, ru, re, mix；
2) ball milling: add raw material and the ethanol of mixing in ball grinder, ground with 100 ~ 300r/min under an argon atmosphere
30 ~ 50h, the powder after grinding is dried；
3) lubricant will be added in dried powder, mix 30 ~ 180min, take mixture specification as required to carry out
Warm compaction molding, obtains into parison；
4) parison will be become under the conditions of 400 ~ 900 DEG C through nitrogen atmosphere pre-burning 5 ~ 20min, remove lubricant therein, you can.
Further, above-mentioned steps 2) in ethanol volume and material powder weight and ratio be (0.4～1.2) ml:1g.
Further, above-mentioned steps 2) described in drying be to be dried under infrared light irradiation.
Further, the power of above-mentioned infrared lamp is 100 ~ 500w.
Further, the time of above-mentioned drying is 5 ~ 10min.
Further, above-mentioned steps 3) described in lubricant quality be material powder weight sum 2%～20%.
Further, above-mentioned lubricant is selected from least one of dimethicone, BS, paraffin, glycerine.
Further, above-mentioned steps 3) described in press used by warm compaction molding be drop hammer type high-speed pressing and forming machine, compacting
Speed 2 ~ 5m/s, jump bit quality 100kg, temperature is 20 ~ 28 DEG C, and mould is made up of Hardmetal materials, mould heating-up temperature
For 80 ~ 180 DEG C.
The invention has the beneficial effects as follows:
1) composition of raw materials of welding material of the present invention is unique, cheap and easy to get, and preparation method is simple is easy to be quick.
2) intensity of the interface after welding material welding of the present invention is high, may be up to 498.8n, the direct stress of corresponding interface is near
800~1000mpa.
3) welding material of the present invention is particularly well-suited to the welding between steel alloy and tungsten electrode, increased and becomes with both sides material
Point homogeney, increase metallurgical bonding interface intensity it is ensured that tungsten electrode durability operationally；Tungsten electrode after welding
More conventional tungsten electrode, had not only reduced cost but also can keep original welding performance, and such as joint strength is high, good arc starting performance, electricity
The static characteristic of arc is good, Properties of High Temperature Creep and anti-yaw damper performance, can substitute conventional tungsten electrode under various operating modes.
Brief description
Fig. 1 measures the schematic diagram of welding junction position mechanical strength for thrust meter；
Fig. 2 varies with temperature curve for tungsten electrode zero-field emission current density after welding；
Fig. 3 is the static characteristic of arc curve of tungsten electrode after welding.
Specific embodiment
Embodiment 1:
1) weigh the common 250g of each material powder by the proportioning of table 1, mix；
The composition of raw materials of table 1 welding material
2) ball milling: add in ball grinder the raw material of above-mentioned mixing, ethanol 100 ~ 300ml, sintered carbide ball 0.25 ~
2.5kg, grinds 30 ~ 50h with 100 ~ 300r/min under an argon atmosphere, will be infrared for 100 ~ 500w in power for the powder after grinding
It is dried 5 ~ 10min under lamp；
3) 5 ~ 50g lubricant will be added in dried powder (in dimethicone, BS, paraffin, glycerine
At least one), mix 30 ~ 180min, take 0.4 ~ 2.0g composite powder to carry out the disc-shaped that warm compaction molding is obtained thickness 0.5 ~ 0.8mm
Alloy preform, obtains into parison；Wherein press used by warm compaction molding is drop hammer type high-speed pressing and forming machine, suppresses speed 2 ~ 5m/s,
Jump bit quality 100kg, temperature is 20 ~ 28 DEG C, and mould is made up of Hardmetal materials, and mould heating-up temperature is 80 ~ 180 DEG C；
4) will become through nitrogen atmosphere pre-burning 5 ~ 20min under the conditions of 400 ~ 900 DEG C in horizontal electric resistance furnace of parison, remove therein
Lubricant, you can.
Embodiment 2:
1) weigh the common 250g of each material powder by the proportioning of table 2, mix；
The composition of raw materials of table 2 welding material
2) ball milling: add raw material, ethanol 200ml, the sintered carbide ball 0.5kg of above-mentioned mixing in ball grinder, in argon gas
Under atmosphere, 30h is ground with 300r/min, the powder after grinding is dried 10min under power is for 200w infrared lamp；
3) 35g lubricant stearic acid N-butyl will be added in dried powder, mix 60min, take 1.0g composite powder
Carry out the disc-shaped alloy preform that warm compaction molding is obtained thickness 0.5mm, obtain into parison；Wherein press used by warm compaction molding is drop hammer type
High-speed pressing and forming machine, suppresses speed 4m/s, jump bit quality 100kg, temperature is 20 ~ 28 DEG C, and mould is Hardmetal materials
Make, mould heating-up temperature is 120 DEG C；
4) will become through nitrogen atmosphere pre-burning 10min under the conditions of 500 DEG C in horizontal electric resistance furnace of parison, remove lubrication therein
Agent, you can.
Embodiment 3:
1) weigh the common 250g of each material powder by the proportioning of table 3, mix；
The composition of raw materials of table 3 welding material
2) ball milling: add raw material, ethanol 200ml, the sintered carbide ball 0.5kg of above-mentioned mixing in ball grinder, in argon gas
Under atmosphere, 30h is ground with 300r/min, the powder after grinding is dried 10min under power is for 200w infrared lamp；
3) 35g lubricant dimethicone will be added in dried powder, mix 60min, take 1.0g composite powder to enter
Row warm compaction molding is obtained the disc-shaped alloy preform of thickness 0.5mm, obtains into parison；Wherein press used by warm compaction molding is that drop hammer type is high
Fast pressing make-up machine, suppresses speed 4m/s, jump bit quality 100kg, temperature is 20 ~ 28 DEG C, and mould is Hardmetal materials system
Become, mould heating-up temperature is 120 DEG C；
4) will become through nitrogen atmosphere pre-burning 10min under the conditions of 500 DEG C in horizontal electric resistance furnace of parison, remove lubrication therein
Agent, you can.
Embodiment 4
1) weigh the common 250g of each material powder by the proportioning of table 4, mix；
The composition of raw materials of table 4 welding material
2) ball milling: add raw material, ethanol 300ml, the sintered carbide ball 2.5kg of above-mentioned mixing in ball grinder, in argon gas
Under atmosphere, 50h is ground with 100r/min, the powder after grinding is dried 5min under power is for 500w infrared lamp；
3) 50g lubricant glycerine will be added in dried powder, mix 180min, take 1.0g composite powder to carry out temperature and pressure
Shaping is obtained the disc-shaped alloy preform of thickness 0.5mm, obtains into parison；Wherein press used by warm compaction molding is drop hammer type high velocity compacted
Forming machine, suppresses speed 5m/s, jump bit quality 100kg, temperature is 28 DEG C, and mould is made up of Hardmetal materials, and mould adds
Hot temperature is 180 DEG C；
4) will become through nitrogen atmosphere pre-burning 5min under the conditions of 900 DEG C in horizontal electric resistance furnace of parison, remove lubricant therein,
?.
Embodiment 5
1) weigh the common 250g of each material powder by the proportioning of table 5, mix；
The composition of raw materials of table 5 welding material
2) ball milling: add raw material, ethanol 100ml, the sintered carbide ball 0.25kg of above-mentioned mixing in ball grinder, in argon gas
Under atmosphere, 40h is ground with 300r/min, the powder after grinding is dried 10min under power is for 100w infrared lamp；
3) 5g lubricant paraffin will be added in dried powder, mix 30min, take 1.0g composite powder to carry out temperature and pressure one-tenth
Type is obtained the disc-shaped alloy preform of thickness 0.5mm, obtains into parison；Wherein press used by warm compaction molding becomes for drop hammer type high velocity compacted
Shape machine, suppresses speed 2m/s, jump bit quality 100kg, temperature is 20 DEG C, and mould is made up of Hardmetal materials, mould heats
Temperature is 80 DEG C；
4) will become through nitrogen atmosphere pre-burning 20min under the conditions of 400 DEG C in horizontal electric resistance furnace of parison, remove lubrication therein
Agent, you can.
Below the welding material of preparation in embodiment is made with further effect detection.
The welding material of Example 2～3 preparation carries out the Welding experiment between following tungsten electrode and steel alloy, and detects
The intensity of welding rear port, and serviceability (striking performance test, anti-scorching performance test and the static characteristic of arc of tungsten electrode
Test), and (Shenzhen's Weiler reaches Science and Technology Development Co., Ltd.'s production with conventional tungsten electrode in domestic and international industrial production at present
The thorium tungsten electrode of φ 2.4mm) contrasted.
The operating procedure of Welding experiment:
1) take the welding material of diameter identical tungsten electrode bar, cr-w-mo-v steel alloy round bar and embodiment 2～3 preparation；
2) cleaning agent is cleaned by ultrasonic: above-mentioned 3 kinds of materials are put into equipped with the ultrasonic cleaning equipment of environment-friendlywater-based water-based cleaning agent
Carry out ultrasonic wave cleaning, ultrasonic cleaning frequency be 60 ~ 130khz, solvent temperature controls at 25 ~ 100 DEG C, ultrasonic power be 300 ~
1000w, the vibration washing time is 10 ~ 60min；
3) deionized water is cleaned by ultrasonic: the material after above-mentioned cleaning is placed into the ultrasonic cleaning equipment equipped with deionized water
In carry out ultrasonic wave cleaning, ultrasonic cleaning frequency be 60 ~ 130khz, solvent temperature controls at 20 ~ 50 DEG C, ultrasonic power be 300 ~
600w, the vibration washing time is 5 ~ 10min；Then take out be placed again into equipped with repeated washing in the ultrasonic cleaning equipment of deionized water 2 ~
5 times；
4) EtOH Sonicate cleaning: the material after above-mentioned cleaning is placed into and carries out equipped with the ultrasonic cleaning equipment of ethanol
Cleaning, ultrasonic vibration washing frequency 60 ~ 130khz, 20 ~ 30 DEG C of ethanol temperature, ultrasonic power be 300 ~ 400w, the vibration washing time be 1 ~
2min；Repeat vibration washing 1 ~ 2 time；It is then taken out, be placed on the material frame in fume hood and dry；
5) three kinds of materials after above-mentioned drying are put in polytetrafluoroethylene (PTFE) frock it is ensured that tungsten electrode and alloy steel pole are perpendicular
Vertical state (perpendicular to ground)；Wherein welding material adopts the screen cloth frock of tetrafluoroethene material braiding, and mesh is less than weldering thereon
Connect material diameter；
6) plasma cleaning: above-mentioned frock is put in plasma cleaning equipment vacuum chamber together with three kinds of materials, closes
Closed chamber door, is 10 ~ 30cm with the distance of plasma apparatus battery lead plate, first opens vavuum pump and vacuumizes 1 ~ 2min so that vacuum
Reach 10-1~10-3Pa, is then shut off vavuum pump, opens argon inlet valve, when vacuum chamber pressure reaches 100 ~ 1000pa, opens
It is ensured that power 200 ~ 800w, the duration is 5 ~ 10min to plasma emission device power supply, and vacuum indoor temperature controls
Between 20 ~ 100 DEG C, close plasma emission power afterwards, continue to be passed through nitrogen so that vacuum room pressure reach 1.0 ×
105pa~1.4×105Pa, makes door for vacuum chamber when vacuum indoor temperature is down to 20 ~ 50 DEG C and takes out frock, tungsten electrode, steel alloy
Bar and welding material, whole operation is all to carry out in thousand grades of Clean rooms or ten thousand grades of Clean rooms；
7) tungsten electrode bar is vertically placed on solderer (i.e. high-frequency induction welding machine) workbench fixing so as to by wait from
One the facing up of son cleaning, welding material tweezers are folded up in tungsten electrode bar upper surface it is ensured that tungsten electrode bar surface perimeter with
Welding material circumferential edges are alignd；Alloy steel pole is subject to facing down of plasma cleaning, with welding material justified margin it is ensured that tungsten
Electrode stem-welding sheet-alloy steel pole be in now-in-upper arranged in a straight line, three keeps coaxially vertically combination integral；Whole behaviour
It is all to complete in ten thousand grades or thousand grades of Clean rooms；Parameter when high-frequency induction welding machine is welded is: argon filling gas shielded, two
Secondary pressing time 0.7 ~ 1.4s, secondary pressure 0.05 ~ 0.10mpa, 1300 ~ 1450 DEG C of welding temperature, temperature retention time 0.6 ~ 1.2s,
Secondary pressurized time delay 0.05 ~ 0.2s, cool time 2 ~ 4s, high frequency power 3.6kw ~ 4.8kw, high frequency rate 50hz；
8), after the tungsten electrode bar-weld tabs after above-mentioned welding-alloy steel pole room temperature being placed 4 ~ 12h, carry out rod member cylinder
Surface polishing or polishing are processed, and obtain final product the tungsten electrode after welding, the length of this electrode and diameter and existing each tungsten electrode standard
Length consistent with diameter.
First, joint strength test
Joint strength detection is carried out to the tungsten electrode of the above-mentioned welding material welding with embodiment 2～3 preparation.Test adopts
Thrust meter is measured, and thrust meter drives the horizon bar of its wolfram steel material using air pressure, acts on the electrode stem of vertical placement,
Ensure that horizon bar is vertical with electrode stem and centroid point in the same plane, and make the steel end of inexpensive tungsten electrode upward, tungsten end court
Under, the distance of application point distance reference plane (i.e. interface plane) on tungsten electrode for the thrust meter horizon bar is alloy steel pole length
It is fixed as 1.8 ~ 2.2cm, and is provided with safety screen around whole experimental rig preventing from hurting sb.'s feelings, thrust meter electronic display is certainly
Dynamic reading (schematic diagram as shown in Figure 1).Every group of tungsten electrode takes 5, calculates mean value.
As shown in table 6, the interface position after welding material welding of the present invention has very test result as can be seen from Table 6
Good mechanical strength, all in more than 450n, meets the requirement of tungsten electrode application, and especially embodiment 3 welding material welding is followed by
The mechanical strength of mouth is up to 498.8n, the nearly 800 ~ 1000mpa of direct stress of corresponding interface.
Table 6 welding material of the present invention welds the test of rear port position mechanical strength
Note: 500n corresponding interface direct stress 800 ~ 1000mpa
2nd, the tungsten electrode striking performance test after welding material welding
(1) experimental condition: tungsten electrode a diameter of φ 2.4mm, 45 degree of tip cone angle, argon flow amount is 8l/min, and electrode is stretched
Go out length 3mm, arc length 3mm.Using straight polarity direct current mode, tungsten filament is negative electrode, and anode is water-cooled red copper.
(2) testing equipment: the thyristor control direct current tig source of welding current, model yc-300tsp.Digital multimeter, model
dt9205a.Electronic balance ja1003.
(3) result of the test: the tungsten electrode of the welding material welding of embodiment 2～3 preparation welds electricity in 30a, 80a, 150a
During stream, respectively repeat striking 30 times, arcing initiation success rate reaches 100%, striking function admirable.And obtain each tungsten electricity under 30a electric current
The critical arcing voltage of pole, is shown in Table 7.There it can be seen that the critical arcing voltage of tungsten electrode after welding material welding is with routine
Tungsten electrode is not clearly distinguished from, the welding material in the present invention ensure that the original arc starting performance of front end tungsten electrode bar it is ensured that
Good arc starting performance in welding process for the tungsten electrode.
The critical arcing voltage of the tungsten electrode after welding material welding under table 7 30a electric current
3rd, the tungsten electrode electron emission capability measurement after welding material welding
The parameter of electron emission capability standard is mainly zero field current density and electron work functon.As long as typically measuring zero
Field current density, just can be calculated electron work functon.
Method of testing: the experimental provision with turbomolecular pump and ionic pump, system limits vacuum is 6 × 10-6Pa, tested
Negative electrode and anode load this device by flange, constitute planar diode structure, and tested negative electrode can heat in the apparatus, swash
Live, ageing and carry out measurement of emitting performance, in test process, vacuum is maintained at 3 × 10-5More than pa.The same set of calculating of this device
Machine control measurement of emitting performance system match, complete under the control of the computer pulse or direct-current emission i-v characteristic automatic
Measurement, can automatically determine and provide zero-field emission current value.
Due to the collective effect of extra electric field and launching electronics space charge, the Electric Field Distribution of negative and positive interpolar is except completely
Rejection field or accelerate outside the venue, an also transitional region, this region Electric Field Distribution makes negative and positive interpolar have a position electric-field strength
Degree is zero, when this zero-field position falls cathode surface, obtains the important parameter null field of a sign emission of cathode ability
Emission, its theoretical value:
j0=at2Exp(- φ/kt)
In formula: j0, zero-field emission current density (a/cm2)；
K, Boltzmann constant；
A, the emission ratio relevant with material, 120a/cm be can use for tungsten2k；
φ, electron work functon；
T, absolute temperature (k).
Electron work functon also has certain impact to striking performance, and during striking, electrode temperature gradually rises, electric discharge
State is progressively transitioned into arc discharge.High frequency voltage applied in high-frequency arc strike is exactly to make to produce fire between electrode and mother metal
Flower electric discharge, causes space to ionize, so that welding circuit electric current is incrementally increased in the scope needed for arc discharge.In Igniting pattern
Just during the starting the arc, electrode surface is not also heated to sufficiently high temperature, can't work as hot cathode.If electric
The work function on pole surface is low, then the temperature needed for electrode produces thermionic emission is just low, and electrode also more easily produces thermoelectron and sends out
Penetrate, under certain voltage, the electric current of welding circuit increase to produce arc discharge the time needed for electric current fewer, i.e. the starting the arc
Easier success.
Measurement result: the tungsten electrode material of welding material welding having drawn embodiment 2～3 preparation is in different temperatures
Under (1300 DEG C～1500 DEG C), zero-field emission current density is as shown in table 8 and Fig. 2, and calculates the electricity under different temperatures according to it
Sub- work function (as shown in table 9).
Tungsten electrode zero-field emission current density at different temperatures after the welding of table 8 welding material
Tungsten electrode after the welding of table 9 welding material electron work functon at different temperatures
As can be seen that the tungsten electrode after the welding of the embodiment of the present invention 2～3 welding material is 1300 from table 8～9 and Fig. 2
～~ 1500 DEG C are compared with conventional tungsten electrode, and zero-field emission current density is close, and electron work functon is close, thermionic emission ability
Good.The work function of material directly reflects its thermionic emission ability.Illustrate that the welding material in the present invention is electric to tungsten electrode
Sub- emitting performance is favourable.
4th, the tungsten electrode anti-scorching performance test after welding material welding
(1) test condition electrode diameter is φ 2.4mm, and in test, anode used is water-cooled red copper, welding current 180a, electricity
Arc duration 20min, electrode extension 3mm, arc length 3mm, argon flow amount 8l/min, current type and polarity are for direct current just
Connect.
(2) the test equipment thyristor control direct current tig source of welding current, model yc-300tsp.Slide measure, model
Cn61m, electronic balance ja1003.
(3) test result is shown in Table 10.
The anti-scorching performance of the tungsten electrode after the welding of table 10 welding material
From table 10, the tungsten electrode anti-yaw damper performance after the welding of embodiment 2～3 welding material and conventional tungsten electrode do not have
Larger difference, keeps original Properties of High Temperature Creep and anti-yaw damper performance.
5th, the tungsten electrode static characteristic of arc test after welding material welding
(1) experimental condition: tungsten electrode a diameter of φ 2.4mm, 45 degree of tip cone angle, argon flow amount is 8l/min, and electrode is stretched
Go out length 3mm, arc length 3mm.Using straight polarity direct current mode, tungsten filament is negative electrode, and anode is water-cooled red copper.
(2) testing equipment: the thyristor control direct current tig source of welding current (model yc-300tsp), digital multimeter (model
Dt9205a), electronic balance (model ja1003)
(3) test method and result: after arcing, rapidly loop current is adjusted to 20a, exists successively by order from small to large
Electric current is 20a, when 30a, 40a, 50a, 60a, 80a, 100a, 140a, after arc burning is stable, measures corresponding stable state electricity
Stream, magnitude of voltage (as table 11), make the tungsten electricity after the welding of embodiment 2～3 welding material respectively according to the voltage recording, current value
Pole, and the static characteristic of arc curve (VA characteristic curve) of conventional tungsten electrode, as shown in Figure 3.
Magnitude of voltage under different steady-state currents for the tungsten electrode after the welding of table 11 welding material
Its electricity of tungsten electrode and conventional tungsten electrode after the welding of embodiment 2～3 welding material can be seen from table 11 and Fig. 3
Arc transfer curve trend trend is substantially identical.Welding material of the present invention ensure that the uniformity of two ends institutional framework and entirety are steady
Qualitative, so that the static characteristic of electric arc is preferable.
By welding performance test result above, it is known that steel alloy is connected with tungsten with welding material of the present invention
The more conventional tungsten electrode of combination tungsten electrode being together obtained, had not only reduced cost but also can keep original welding performance, can be each
Plant and under operating mode, substitute conventional tungsten electrode.
Claims (10)
1. a kind of between steel alloy and tungsten electrode welding welding material it is characterised in that: it is by following mass fraction
Raw material forms: 25 ~ 30 parts of w, 43 ~ 55 parts of mo, 8 ~ 10 parts of ni, 8 ~ 10 parts of co, 3 ~ 5 parts of fe, in 1 ~ 2 part of ti, v, ru, re at least
A kind of.
2. according to claim 1 a kind of between steel alloy and tungsten electrode welding welding material it is characterised in that:
The particle diameter of described raw material w is 20 ~ 800 m, and the particle diameter of mo is 10 ~ 500 m, and the particle diameter of ni, co, fe, ti, v, ru, re is independent
For 10 ~ 400 m.
3. a kind of welding material described in claim 1 preparation method it is characterised in that: comprise the following steps:
1) proportioning as described in claim 1 weighs each material powder, mixes；
2) ball milling: add raw material and the ethanol of mixing in ball grinder, under an argon atmosphere with 100 ~ 300r/min grind 30 ~
50h, the powder after grinding is dried；
3) lubricant will be added in dried powder, mix 30 ~ 180min, take mixture specification as required to carry out temperature and pressure
Shaping, obtains into parison；
4) parison will be become under the conditions of 400 ~ 900 DEG C through nitrogen atmosphere pre-burning 5 ~ 20min, remove lubricant therein, you can.
4. preparation method according to claim 3 it is characterised in that: step 2) in ethanol volume and raw material weight and ratio
For (0.4～1.2) ml:1g.
5. preparation method according to claim 3 it is characterised in that: step 2) described in drying be under infrared light irradiation
It is dried.
6. preparation method according to claim 5 it is characterised in that: the power of described infrared lamp be 100 ~ 500w.
7. the preparation method according to claim 3 or 5 it is characterised in that: the time of described drying be 5 ~ 10min.
8. preparation method according to claim 3 it is characterised in that: the quality of lubricant described in step 3) be raw material powder
The 2%～20% of last weight sum.
9. the preparation method according to claim 3 or 8 it is characterised in that: described lubricant be selected from dimethicone, tristearin
At least one of sour N-butyl, paraffin, glycerine.
10. preparation method according to claim 3 it is characterised in that: used by warm compaction molding described in step 3), press is
Drop hammer type high-speed pressing and forming machine, suppresses speed 2 ~ 5m/s, jump bit quality 100kg, temperature is 20 ~ 28 DEG C, and mould is hard
Alloy material is made, and mould heating-up temperature is 80 ~ 180 DEG C.
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| CN104117783B true CN104117783B (en) | 2017-01-18 |
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| CN108356440A (en) * | 2017-12-29 | 2018-08-03 | 安徽宝辰机电设备科技有限公司 | A method of improving tungsten electrode and low price steel alloy welding junction intensity |
| JP7231477B2 (en) * | 2019-05-09 | 2023-03-01 | 株式会社神戸製鋼所 | FLUX CORE WIRE, WELDING METHOD AND WELD METAL |
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| US2983996A (en) * | 1958-07-30 | 1961-05-16 | Mallory & Co Inc P R | Copper-tungsten-molybdenum contact materials |
| JPS5817827B2 (en) * | 1976-01-12 | 1983-04-09 | 株式会社日立製作所 | Spraying method |
| DE19508947A1 (en) * | 1995-03-13 | 1996-09-19 | Patentstelle Fuer Die Deutsche | New wear resistant iron@-molybdenum@-tungsten@ alloy |
| US8703044B2 (en) * | 2006-01-03 | 2014-04-22 | General Electric Company | Machine components and methods of fabricating and repairing |
| JP4902489B2 (en) * | 2007-02-19 | 2012-03-21 | 株式会社神戸製鋼所 | High strength Cr-Mo steel weld metal |
| CN101412158B (en) * | 2008-12-01 | 2011-06-08 | 攀枝花钢城集团有限公司 | Flux-cored wire for producing hot rolling coiler wrapper roller by overlaying welding and overlaying welding method |
| CN102500954A (en) * | 2011-11-23 | 2012-06-20 | 安徽华东光电技术研究所 | Alloy solder for dipping barium tungsten cathode and welding method thereof |
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