CN104772542B - The hard alloy of WC particle In-sltu reinforcement and the ultrasonic brazing method of steel - Google Patents
The hard alloy of WC particle In-sltu reinforcement and the ultrasonic brazing method of steel Download PDFInfo
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- CN104772542B CN104772542B CN201510174813.7A CN201510174813A CN104772542B CN 104772542 B CN104772542 B CN 104772542B CN 201510174813 A CN201510174813 A CN 201510174813A CN 104772542 B CN104772542 B CN 104772542B
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- hard alloy
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- particle
- brazing
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/06—Soldering, e.g. brazing, or unsoldering making use of vibrations, e.g. supersonic vibrations
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
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Abstract
The invention discloses the ultrasonic brazing method of a kind of hard alloy of WC particle In-sltu reinforcement and steel, for the high-quality soldering to thin slice hard alloy and steel.Carry out according to the following steps：Polished, and with acetone the surface after polishing is cleaned with to surface to be connected before a, soldering；Ag base solder paillon foils are placed between hard alloy and steel before b, soldering；C, ultrasonic vibration is applied to hard alloy to be welded and steel；D, brazing process are using heat source way that can be common in stove or in the soldering such as high-frequency induction heating, and brazing temperature is 730~850 DEG C；After e, ultrasonic vibration terminate, the enhanced weld seam of WC ceramic particles that natural cooling is obtained.The inventive method utilizes the perturbation action of ultrasonic wave, after the Co matrixes during solder dissolves hard alloy, the WC particle of no Co bond matrix is migrated into brazed seam, the enhanced brazed seam of WC particle is formed, so as to increase substantially the mechanical property of joint.The present invention removes the oxide-film of hard alloy and steel surface using ultrasonic cavitation, it is not necessary to use brazing flux, under air can welding, technique is simple, environmental protection and welding efficiency is high, is adapted to engineer applied.
Description
Technical field
The present invention relates to a kind of hard alloy and the soldering processes of steel, and in particular to a kind of hard of WC particle In-sltu reinforcement
The ultrasonic brazing method of alloy and steel.
Background technology
In recent years, developing rapidly with China's communications and transportation industry so that the large-scale application for making engineering machinery firm by ramming is increasingly
Extensively.And hard alloy is to make one of topmost part of tools production firm by ramming.The sintered-carbide tool integral level of China
Larger with external gap, the welding technique of wherein sintered-carbide tool has become the key technology for limiting its development.
The main problem of sintered-carbide tool welding has following, and one is solder to the WC ceramics in hard alloy
The wetability of grain is poor, causes interface bonding strength low.Two be sintered-carbide tool welding when more than welded using Ag base solders,
Brazed seam hardness is small, excessive with mother metal performance difference.In current existing patent, such as patent (application number CN 101972904A)
Disclose a kind of active high-temp solder and soldering is carried out to hard alloy.Patent (application number 200810045993.9) discloses one kind
The method of hard alloy cutter connection and the brazing flux of use are realized using soldering tech.But for the large-scale tamper of hard alloy
The application in the fields such as tool still has several distinct issues：
1. the composition of the conventional multipair solder of method is improved to improve wetability of the solder to hard alloy, but
Solder preparation process is complicated, and preparation technology and equipment requirement are higher, and the production cycle is long, does not possess versatility.
2. current method can not solve hard alloy and steel brazed seam hardness it is too low the problem of.Simultaneously for bearing favourable opposition
The application field of load is hit, current strength of joint and structure far can not meet high-quality long-life requirement.
3. current method for welding realizes the welding of sintered-carbide tool, brazing flux reaction using the method for brazing flux soldering mostly
When release toxic gas be unfavorable for environmental protection, and residual brazing flux will reduce the mechanical property and corrosive nature of joint.
The content of the invention
The present invention be make that tool weld strength of joint is relatively low, impact resistance load-carrying ability is poor firm by ramming to solve hard alloy, profit
Moist poor, special solder prepares the problems such as complicated, soldering processes are complicated and for hard alloy makes tool weld firm by ramming there is provided a kind of
The new ultrasonic brazing method of WC particle In-sltu reinforcement.
The present invention solves its technical problem, and the technical scheme used is：
The hard alloy of WC particle In-sltu reinforcement and the ultrasonic brazing method of steel, the high intensity for hard alloy and steel
Connection, its brazing process is followed the steps below：Surface to be connected is polished before a, soldering, and with acetone to polishing
Surface afterwards is cleaned；Ag base solder paillon foils are placed between hard alloy and steel before b, soldering；C, hard to be welded closed
Gold and steel apply ultrasonic vibration, and wherein 18~25kHz of ultrasonic frequency, 4~20 μm of amplitude, ultrasonic head is located at carbide surface
Or steel surface；Apply ultrasonic time 0.1s-10min, mobile ultrasound head makes the solder of whole joint face all realize joint filling；D, soldering
Process is using heat source way that can be common in stove or in the soldering such as high-frequency induction heating, and brazing temperature is 730~850 DEG C；It is e, super
After acoustic vibration terminates, test specimen natural cooling obtains the welding finished product for the WC ceramic particles for having brazed seam humidification in brazing seam structure.
In the hard alloy and steel mother metal that are used, the thickness of at least one mother metal is between 2~5mm.
Described Ag bases solder is Ag-Cu-Zn-Mn-Ni solders, and its liquidus curve scope is between 700-800 DEG C, solder paper tinsel
Piece thickness is between 50~200 μm.
The ultrasound applies can also both be applied on steel on hard alloy, and the mother metal for applying ultrasound requires thick
Degree is in below 5mm.
Ultrasonic application time removes hard alloy and steel surface between 60s~10min using the cavitation of ultrasonic wave
Oxide-film, be not required to use brazing flux or other protective atmospheres in the process, brazing process carries out in an atmosphere.
It can use in stove or the multiple heating mode such as sensing heating, optimal brazing temperature is between 730 DEG C~800 DEG C.
Implement during ultrasonic brazing, the WC particle in hard alloy mother metal will be under ul-trasonic irradiation from hard alloy
In migrate into brazed seam, the enhanced brazed seam of postwelding formation WC ceramic particles, and reach the purpose of enhancing joint mechanical property.
Using the inventive method, the outstanding advantages having are：
(1) the HTHP effect produced when the inventive method is acted on using ultrasonic cavitation, the formation office on mother metal surface
Portion active region, so as to strengthen wetability of the general commercial solder to hard alloy, without especially preparing special active solder, i.e.,
The good combination at interface can be achieved.
(2) present invention after the Co matrixes during solder dissolves hard alloy, makes no Co bases using the perturbation action of ultrasonic wave
The WC particle that body is bonded is migrated into brazed seam, the enhanced brazed seam of WC particle is formed, so as to increase substantially the mechanical property of joint.
The main component of above-mentioned hard alloy is the hard alloy of YG series, and its main component is Co base WC hard alloy.
(3) oxide-film for removing hard alloy and steel surface is acted in the present invention using ultrasonic cavitation, without using pricker
Agent or protective atmosphere, can be achieved the high-quality soldering of hard alloy and steel in an atmosphere, and the room temperature shearing strength of joint is reachable
More than 390MPa, and soldering processes are simple, low cost, economical environment-protective, production efficiency is high, suitable for industrial production application.
Brief description of the drawings
Fig. 1 is the ultrasonic brazing process and schematic device of WC particle In-sltu reinforcement hard alloy and steel.In figure：1- is hard
Matter alloy sheet, 2- steel discs, 3- solders, 4- ultrasound heads, 5- fixtures, 6- heaters.
Fig. 2 is the microstructure scanning electron microscope (SEM) photograph of the ultrasonic brazing joint of WC particle In-sltu reinforcement hard alloy and steel
Piece.
Fig. 3 is the scanning electron microscope (SEM) photograph of the interfacial structure of the ultrasonic brazing joint of WC particle In-sltu reinforcement hard alloy and steel
Piece, wherein Fig. 3 a are hard alloy side, and Fig. 3 b are steel part side.
Embodiment
As shown in figure 1, embodiments of the present invention are followed the steps below：To hard alloy to be connected before a, soldering
1 and the surface of steel 2 polished respectively, and the surface after polishing is cleaned with acetone；By Ag base solder paper tinsels before b, soldering
Piece 3 is placed between hard alloy 1 and steel 2；C, by ultrasound first 4 be placed in the surface of hard alloy 1 temperature be 380 DEG C when to be welded
Hard alloy and steel apply ultrasonic vibration 5min；D, brazing process use high-frequency induction heating mode；E, ultrasonic vibration terminate certainly
So cooling, the enhanced weld seam of WC ceramic particles of acquisition.
The brazed seam joints morphology (SEM patterns) obtained in the present embodiment is shown in Fig. 2, and bilateral interfacial structure is shown in Fig. 3, it is seen that
Interface cohesion is good, and has the white WC particle that hard alloy side is migrated in brazed seam center Dispersed precipitate, can play enhancing
The effect of weld seam.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or to which part technical characteristic progress equivalent；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (4)
- The ultrasonic brazing method of the enhanced hard alloy of 1.WC particle in-situs and steel, the high intensity for hard alloy and steel connects Connect, it is characterised in that its brazing process is followed the steps below：Surface to be connected is polished before a, soldering, is used in combination Acetone is cleaned to the surface after polishing；Ag base solder paillon foils are placed between hard alloy and steel before b, soldering, Ag base prickers Expect for Ag-Cu-Zn-Mn-Ni solders, its liquidus curve scope between 700-800 DEG C, solder foil thickness 50~200 μm it Between；C, apply ultrasonic vibration to hard alloy to be welded and steel, wherein 18~25kHz of ultrasonic frequency, 4~20 μm of amplitude surpasses Sound head is located at carbide surface or steel surface；Apply ultrasonic time 60s-10min, mobile ultrasound head makes the pricker of whole joint face Material all realizes joint filling, removes hard alloy and the oxide-film of steel surface using the cavitation of ultrasonic wave, is not required in the process Using brazing flux or other protective atmospheres, brazing process is carried out in an atmosphere；D, brazing process use high-frequency induction heating mode, pricker It is 730~800 DEG C to weld temperature；After e, ultrasonic vibration terminate, test specimen natural cooling, obtaining in brazing seam structure has brazed seam humidification WC ceramic particles welding finished product；The hard alloy is the hard alloy of YG series, and its main component is Co base WC hard Alloy.
- 2. the hard alloy of WC particle In-sltu reinforcement according to claim 1 and the ultrasonic brazing method of steel, its feature It is that the thickness of at least one mother metal is between 2~5mm in the hard alloy and steel mother metal used.
- 3. the hard alloy of WC particle In-sltu reinforcement according to claim 1 and the ultrasonic brazing method of steel, its feature It is that the ultrasound applies can also both be applied on steel on hard alloy, the mother metal for applying ultrasound requires that thickness exists Below 5mm.
- 4. the hard alloy of WC particle In-sltu reinforcement according to claim 1 and the ultrasonic brazing method of steel, its feature It is that the WC particle in hard alloy mother metal will be moved under ul-trasonic irradiation from hard alloy during implementation ultrasonic brazing Move in brazed seam, the enhanced brazed seam of postwelding formation WC ceramic particles, and reach the purpose of enhancing joint mechanical property.
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| CN201510174813.7A CN104772542B (en) | 2015-04-14 | 2015-04-14 | The hard alloy of WC particle In-sltu reinforcement and the ultrasonic brazing method of steel |
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| CN201510174813.7A CN104772542B (en) | 2015-04-14 | 2015-04-14 | The hard alloy of WC particle In-sltu reinforcement and the ultrasonic brazing method of steel |
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| CN104772542B true CN104772542B (en) | 2017-07-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105234555B (en) * | 2015-11-13 | 2018-02-09 | 哈尔滨普瑞斯材料科技有限公司 | A kind of ultrasonic assistant transition liquid-phase connection method |
| CN105618885B (en) * | 2016-03-25 | 2019-01-18 | 浙江邦驰汽车零部件有限公司 | A method of reinforced phase is formed by regulation and strengthens composite weld structural material |
| CN106270873B (en) * | 2016-08-31 | 2019-10-29 | 郑州机械研究所有限公司 | A kind of method for welding of hard alloy |
| CN111347115B (en) * | 2020-04-09 | 2021-11-30 | 河南科技大学 | Tool for ultrasonic-assisted solder spreading |
| CN113000967A (en) * | 2021-03-10 | 2021-06-22 | 北京理工大学 | Ultrasonic-assisted high-frequency brazing method and device for micro-miniature superhard cutter |
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| CN102513636A (en) * | 2011-12-23 | 2012-06-27 | 哈尔滨工业大学 | Brazing method capable of reducing residual stress on ceramic and metal joints |
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| JP3468393B2 (en) * | 1996-03-12 | 2003-11-17 | スズキ株式会社 | Zinc solder layer forming method and ultrasonic soldering joining method |
| US7152775B2 (en) * | 2004-04-19 | 2006-12-26 | The Boeing Company | Magnetic source and ferromagnetic device for ultrasonic welding |
| CN100519032C (en) * | 2007-07-20 | 2009-07-29 | 哈尔滨工业大学 | Method for low temperature brazing aluminium alloy to obtain brazed joint with high temperature use performance |
| CN101829824B (en) * | 2010-04-12 | 2012-02-08 | 广州电器科学研究院 | Compound heating soldering method of precise part resistance heat and supersonic vibration |
| CN102909489B (en) * | 2012-10-30 | 2015-07-29 | 江苏科技大学 | A kind of connect carbide alloy and steel chilling solder and preparation method and method of attachment |
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| CN102513636A (en) * | 2011-12-23 | 2012-06-27 | 哈尔滨工业大学 | Brazing method capable of reducing residual stress on ceramic and metal joints |
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