CN102500910B - Cladless seal welding method for hot isostatic pressing welding - Google Patents
Cladless seal welding method for hot isostatic pressing welding Download PDFInfo
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- CN102500910B CN102500910B CN201110346196.6A CN201110346196A CN102500910B CN 102500910 B CN102500910 B CN 102500910B CN 201110346196 A CN201110346196 A CN 201110346196A CN 102500910 B CN102500910 B CN 102500910B
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Abstract
The invention relates to a cladless seal welding method by using hot isostatic pressing welding. According to the cladless seal welding method, two parts which are to be welded and are needed to be connected by diffusion welding are machined to form shapes which are matched mutually, the excellent fit relation and surface quality of a bonding surface are ensured, and the two members which are needed to be subjected to diffused connection are assembled, so that the bonding surface is in tight fit or an auxiliary technological measure is adopted to fit the bonding surface tightly; and the periphery of the bonding surface is subjected to seal welding by soldering, diffusion welding, laser cladding and electromagnetic pulse welding. The parts subjected to the seal welding are heated and pressurized in a hot isostatic pressing furnace to realize the final welding of the bonding surface. The invention provides a new technical path for the reliable welding of new materials and special structures.
Description
Technical field:
The present invention is a kind of hot isostatic press welding method adopted without jacket soldering and sealing, belongs to Hot Isostatic Pressing Diffusion technical field.
Background technology:
In recent years along with the development of material science, new material continues to bring out, and in production application, often runs into new material itself or the connectivity problem with other material.As pottery, intermetallic compound, powder metallurgy and single crystal alloy etc., with traditional fusion welding method, be difficult to realize connecting reliably.And the manufacture of some special high-performance components, often need foreign material larger for performance difference, as metal and pottery, aluminium and steel, titanium and steel, metal and glass, intermetallic compound and metal etc. link together, this is also difficult to realize with traditional fusion welding method.In order to adapt to this requirement, Diffusion Welding technology causes the attention of people, becomes the study hotspot of welding field.This technology has been widely used in the welding between difficult wlding material and foreign material, wherein dissimilar metal, and ceramic/metal welding dissimilar materials component is with a wide range of applications at aerospace field.
Diffusion Welding is the one of Pressure Welding, and it refers to the surface contacted with each other, under the effect of high moderate pressure, be connected surface close to each other, locally there is plastic deformation, after certain hour, phase counterdiffusion between binder course atom and form the process of overall reliable connection.Temperature, pressure, time are the major parameters of Diffusion Welding.Pressure needed for general diffusion welding craft is realized by unidirectional mechanical pressure, and the Diffusion Welding of such as two flat boards applies to realize perpendicular to the mechanical pressure of solder side by frock.Mechanical pressure normally makes pressure head produce a displacement by the oil cylinder-piston system of the hydraulic system of diffusion welding (DW) equipment, acts on frock and workpiece realize, and also realizes pressurization by screw mechanism.But unidirectional compression system has significant limitation, for baroque, need multinomial pressurization, be difficult to exert pressure due to reasons in structure, the area that need pressurize is larger and the conventional diffusion welding (DW) such as easily deformable structure can not adapt to, has developed heat iso-hydrostatic diffusion welding technique for this reason.
High temperature insostatic pressing (HIP) (HIP) technology to treat that pressure workpiece is placed in high-pressure bottle, the character of the even transmission of pressures such as gas medium is utilized to carry out uniform pressurization from all directions to workpiece, heat simultaneously, under the effect of temperature and pressure, realize the technology of materials processing.High temperature insostatic pressing (HIP) is mainly used in Powder Metallurgy Industry, shaping for high performance dusty material goods, as the production of powder metallurgy high-temperature alloy, PM HSS, carbide alloy, ceramic material etc.The fields such as along with the development of hot isostatic pressing technique, this technology is also used to the densification of material, diffusion connection.
General hot isostatic pressing technique needs the jacket of a sealing to be sealed in by machined material (as metal dust) in a space closed, the material to be processed closed by jacket is placed in high temperature insostatic pressing (HIP) stove, gases at high pressure in stove form uniform pressure to jacket and seal cavity thereof, apply each to uniform extruding force by jacket to machined material, jacket is out of shape, and makes densifying materials.Two kinds of block materials are placed in a jacket, two block materials contacts site can be applied pressure by high temperature insostatic pressing (HIP), realize Diffusion Welding.
From the principle of high temperature insostatic pressing (HIP), the prerequisite forming the pressure effect such as heat is pressed material must form a seal cavity closed, usual employing jacket technology forms required seal cavity, but also can utilize by the compactness of pressure material itself and sealing, adopt, without jacket technology, densification is carried out to material, or utilization is realized soldering and sealing by pressure material itself to the space that hope is pressurizeed, and realizes exerting pressure to soldering and sealing region.The square bloom that such as two block sizes are identical, to wherein two sides alignment fit, then the gap periphery of electron beam welding to laminating is adopted to carry out soldering and sealing welding under vacuum conditions, seal cavity is formed like this at binding face, then heat in high temperature insostatic pressing (HIP) stove, pressurization, the diffusion that namely can realize two square bloom binding faces connects.
To the solder technology demand of foreign material and unique construction strongly, wherein heat iso-hydrostatic diffusion welding technology is one of most promising technological means to the industries such as Aeronautics and Astronautics.But for baroque abnormally-structured, the jacket applying to fit like a glove to it is almost impossible, therefore, the heat iso-hydrostatic diffusion welding technology without jacket is adopted to become the one preferred technique scheme of the diffusion welding (DW) of labyrinth.Heat iso-hydrostatic diffusion welding technology without jacket must carry out soldering and sealing, but due to reasons such as weld crackings during welding, its sealing technique exists great difficulty, therefore, solves the prerequisite that reliable soldering and sealing problem becomes cladless HIP Pervasion Weld Technology successful Application.
Summary of the invention
The present invention designs for above-mentioned problems of the prior art a kind of hot isostatic press welding method adopted without jacket soldering and sealing that provides just, its objective is and solves without jacket soldering and sealing, for heat iso-hydrostatic diffusion welding provides safeguard.
The object of the invention is to be realized by following technical measures:
This kind adopts the hot isostatic press welding method without jacket soldering and sealing, it is characterized in that: treat that weldment assembles up by matching relationship two, joint face is coincide mutually, then treats that weldment joint face exposes border, gap and carries out soldering and sealing to two, soldering and sealing adopts one of following methods:
(1) treat at one the convex edge that the joint face periphery processing of weldment is auxiliary, treat that weldment applies the pressure of vertical welding junction to two, and heat, convex edge is made preferentially plastic deformation to occur, and convex edge and another treated the corresponding position of weldment welds by diffusion welding (DW), and the main solder side of weldment obtains bump contact to make two to treat;
(2) treat weldment for two large-area weldings, treat that the joint face periphery of weldment sandwiches auxiliary pad along two, treat that weldment applies the pressure of vertical welding junction to two, and heat, pad is made preferentially plastic deformation to occur, and treat that the corresponding position of weldment welds by diffusion welding (DW) by upper and lower for pad, and the main solder side of weldment obtains bump contact to make two to treat;
(3) treat that the joint face periphery of weldment covers annular shim at two, annular shim welds with two positions for the treatment of that weldment above and below contacts by the method adopting diffusion welding (DW), soldering or electromagnetic pulse to weld simultaneously;
(4) treat that the joint face periphery of weldment places an auxiliary block at two, the method for being welded by diffusion welding (DW), soldering or electromagnetic pulse is welded auxiliary block with two positions for the treatment of that weldment contacts simultaneously simultaneously;
(5) treat that the joint face periphery of weldment adopts the method for powder laser cladding to weld to two, to two, the heap utilizing powder laser cladding to be formed covers treats that the joint face gap of weldment covers.
Technical solution of the present invention treats that weldment is first processed into the shape cooperatively interacted by need diffusion welding (DW) to connect two, ensure the matching relationship that faying face is good and surface quality, two components that need spread connection assemble up and joint face are fitted tightly or adopts auxiliary technological measure, then soldering, diffusion welding (DW), laser melting coating, electromagnetic pulse welding is adopted, soldering and sealing is carried out to the surrounding of faying face, assembly after soldering and sealing is put into hot isostatic apparatus, heats, pressurizeing realizes diffusion connection.
The advantage of technical solution of the present invention adopts special welding technique, comprise soldering, diffusion welding (DW), laser melting coating, electromagnetic pulse welding, and auxiliary corresponding structural member, solve the fusion welding methods such as arc welding, electron beam welding, Laser Welding and be difficult to realize reliable soldering and sealing problem, the soldering and sealing effect of high-quality can be obtained, for the Hot Isostatic Pressing Diffusion of part provides guarantee.
Accompanying drawing explanation
Fig. 1 ~ Fig. 8 is the schematic diagram of the soldering and sealing mode of the embodiment of technical solution of the present invention
Detailed description of the invention
Below with reference to drawings and Examples, technical solution of the present invention is further described:
This kind adopts the hot isostatic press welding method without jacket soldering and sealing, it is characterized in that: treat that weldment 1 assembles up by matching relationship two, joint face is coincide mutually, then treats that weldment 1 joint face exposes border, gap and carries out soldering and sealing to two, soldering and sealing adopts one of following methods:
(1) see shown in accompanying drawing 1 ~ 2, the convex edge 2 that the joint face periphery processing of weldment 1 is auxiliary is treated at one, convex edge thickness 0.1 ~ 2.0mm, optimum thickness 0.2 ~ 1.0mm, treat that weldment 1 applies the pressure of vertical welding junction to two, and heat, make convex edge 2 preferentially plastic deformation occur, and convex edge 2 and another treated the corresponding position of weldment 1 welds by diffusion welding (DW), and the main solder side of weldment 1 obtains bump contact to make two to treat;
(2) see shown in accompanying drawing 3, weldment 1 is treated for two large-area weldings, treat that the joint face periphery of weldment 1 sandwiches auxiliary pad 3 along two, treat that weldment 1 applies the pressure of vertical welding junction to two, and heat, make pad 3 preferentially plastic deformation occur, and treat that the corresponding position of weldment 1 welds by diffusion welding (DW) by upper and lower for pad 3, and the main solder side of weldment 1 obtains bump contact to make two to treat;
(3) see shown in accompanying drawing 4 ~ 5, the circular cylindrical face that weldment 1 is formed is treated for two two of being set in together, treat that the joint face periphery of weldment 1 covers annular shim 4 at two, annular shim 4 welds with two positions for the treatment of that weldment 1 above and below contacts by the method adopting diffusion welding (DW), soldering or electromagnetic pulse to weld simultaneously;
(4) see shown in accompanying drawing 6, treat that the joint face periphery of weldment 1 places an auxiliary block 5 at two, the method for being welded by diffusion welding (DW), soldering or electromagnetic pulse is welded auxiliary block 5 with two positions for the treatment of that weldment (1) contacts simultaneously simultaneously;
(5) see accompanying drawing 7 ~ 8, treat that the joint face periphery of weldment 1 adopts the method for powder laser cladding to weld to two, to two, the heap utilizing powder laser cladding to be formed covers 6 treats that the joint face gap of weldment 1 covers, heap cover 6 with part 1, part 2 all can be formed densification atom be combined, complete soldering and sealing.
In above-described embodiment, pad 3, annular shim 5 and auxiliary block 5 can adopt the material identical with treating weldment 1 to make, and also can select the easily welding material such as Ni, Fe, Ag, Cu, Al.Supplementary structure welding aft-loaded airfoil is removed.
Technical solution of the present invention may be used for the manufacture of gas-turbine unit double-alloy blisk, hollow vortex wheel disc.
Compared with prior art, the present invention proposes a kind of hot isostatic press welding method adopted without jacket soldering and sealing, by adopting the special process method such as mechanical pressure diffusion welding (DW), laser melting coating, electromagnetic pulse welding and the soldering and sealing of auxiliary process measure realization to solder side, then the part after soldering and sealing is placed in temperature-pressure in high temperature insostatic pressing (HIP) stove, realizes the final welding of joint face.The new technological approaches that the reliable welding of new material of the present invention and unique construction provides.
Claims (1)
1. adopt the hot isostatic press welding method without jacket soldering and sealing, it is characterized in that: the method adopts one of following process:
Process one:
That two of plane of the same size treat weldment (1) for solder side, the convex edge (2) that the periphery processing of the connection plane of weldment (1) is auxiliary is treated at one, convex edge thickness is 0.2 ~ 1.0mm, another is treated the connection plane of weldment (1) is placed on convex edge (2), treat that weldment (1) applies the pressure of vertical welding junction to two, and heat, convex edge (2) is made preferentially plastic deformation to occur, and by diffusion welding (DW), convex edge (2) and another are treated that the position that weldment (1) contacts welds, the main solder side of weldment (1) obtains bump contact to make two to treat, realize the soldering and sealing to solder side, then the part after soldering and sealing is placed in temperature-pressure in high temperature insostatic pressing (HIP) stove, realize the final welding of joint face,
Process two:
That two of the plane caused not of uniform size treat weldment (1) for solder side, two are treated the solder side laminating of weldment (1), cover on the step-like gap of solder side formation by auxiliary block (5), the method adopting diffusion welding (DW), soldering or electromagnetic pulse to weld welds auxiliary block (5) with two positions for the treatment of that weldment (1) contacts simultaneously simultaneously, realize the soldering and sealing to solder side, then the sub-assembly after soldering and sealing is placed in temperature-pressure in high temperature insostatic pressing (HIP) stove, realize the final welding of joint face, remove auxiliary block (5) afterwards;
Process three:
That two of annular cylinder treat weldment (1) for solder side, described solder side be an inner surface treating the annular cylinder of weldment (1) and another treat the outer surface of the annular cylinder of weldment (1), two are treated weldment (1) is set in together, both solder side laminatings, both ends of the surface are concordant, at the two ends of sub-assembly, annular shim (4) is used to cover on the gap of solder side formation respectively, adopt diffusion welding (DW), annular shim (4) welds with two positions for the treatment of that weldment (1) both ends of the surface contact by the method for soldering or electromagnetic pulse weldering simultaneously, realize the soldering and sealing to solder side, then the sub-assembly after soldering and sealing is placed in temperature-pressure in high temperature insostatic pressing (HIP) stove, realize the final welding of joint face, remove annular shim (4) afterwards,
Above-mentioned auxiliary block (5) and annular shim (4) adopt the material identical with treating weldment (1) to make, or make with Ni, Fe, Ag, Cu, Al material.
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| CN201110346196.6A CN102500910B (en) | 2011-11-04 | 2011-11-04 | Cladless seal welding method for hot isostatic pressing welding |
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Cited By (1)
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| CN108788655A (en) * | 2018-08-21 | 2018-11-13 | 北京航空航天大学 | A kind of method of nickel base superalloy annular element diffusion connection Kufil |
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| CN104625629A (en) * | 2014-12-23 | 2015-05-20 | 中国航空工业集团公司北京航空制造工程研究所 | Titanium-aluminium alloy blisk and manufacturing method thereof |
| CN106513675A (en) * | 2016-11-09 | 2017-03-22 | 北京卫星制造厂 | Laser additive manufacturing forming method of titanium alloy thin-walled component |
| CN107584117A (en) * | 2017-08-30 | 2018-01-16 | 西安铂力特增材技术股份有限公司 | A kind of method that metallic article is prepared based on discrete manufacturing technology |
| CN108857113A (en) * | 2018-08-21 | 2018-11-23 | 北京航空航天大学 | A kind of nickel base superalloy channel design diffusion joint forming method |
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