Joining method of melt-formed body

[Detailed Description of the Invention]

Un-inventing relates to the method of joining that it is simple and firmly two pieces or the ingot objects beyond it in more detail about the joining method between ingot objects using a tabular metal porous body. Junction art which carries out assembly union of the ingot objects occupies an important position in forging technology. The former, This. Although welding, friction pressure welding, wax, Diffusion bonding@ using electricity and gas as junction art of *, etc. are used, there are merits and demerits in such junction art, respectively, and it may not necessarily be satisfied fully. For example, electricity and gas which are used most generally now? Welding to be used, the time of junction of what has a very simple work form -- a near joined part -- all -- when -- in order to carry out the Expectoration dissolution, the portion has a problem in respect of becoming the character of an ingot object base material part, and a heterogeneous thing in response to a thermal effect, and the reliability of the obtained zygote. - although it is a method suitable for mass production since the time of friction pressure welding which automation is easy and junction takes to it is also very as short as only several seconds again -- that the connected surface is carrying out eccentricity greatly Or -- Very agile -- in a complicated-shaped thing, use is difficult -- etc. -- it has a fault. -Although there is no difficulty by the above product configurations, in soldering, neither 10,000, soldering nor diffused junction is enough as the intensity of the wax material used as adhesives, and, as a result, the intensity of profitable Fl(s)-Products also has a fault of [ in sufficient thing ] a stake for obtaining by it. in the case of diffused junction, make a connected surface purification extremely, and join and drop off under an advanced vacuum atmosphere like 10'torr after also smoothing the surface enough -- since a strict working condition -- there is nothing -- is required if it is Leave The field for which this diffused junction is used has problems -- obtained products, such as an aircraft industry and the nuclear power industry, are restricted to the field which has a high added value. Non-artificers do not receive restrictions of shape at all in view of such the actual condition, And as a result of repeating research wholeheartedly that it is simple and should develop the joining method of the ingot objects which have junction power firm moreover enough, without needing a strict working condition, by using a root-like metal porous body, that object is achieved and it came to complete un-inventing based on scales, all the titles, and this knowledge. Namely, after un-inventing arranges a tabular metal porous body between two Mff objects, The infiltration material which has the melting point lower than the ingot objects and a metal porous body in the peripheral part of this metal porous body is arranged, To subsequently, this thing: It heats under press beyond 5 kgf / c21 below the melting point of the ingot objects and a metal strip 1 porous object, and more than the melting point of the infiltration material, After making the infiltration material infiltrate a bonded surface and the metal porous body part, the ingot objects cooling below to the melting point of the infiltration material joining method all provide. Since the joined part of ingot objects is mutually contacted directly every time it removes some Love methods using adhesives, such as soldering, when the feature of a misfire dawn method joining ingot objects by the conventional conjugation method, it is Contact = 3. - Although Synthesis was performed, in a misfire dawn method, a tabular metal porous body is made to intervene between the ingot objects and ingot objects which it is going to join, and it is made the shape of sandwiches of Bursting object-metal porous body-ingot forms, and is on the point which joins ingot objects firmly via the tabular metal porous body. Although a part of thing which you make it placed between a superplastic-materials total conjugation side, and is joined by this material carrying out diffused junction Gender use in recent years is tried, a misfire dawn method differs from this un-qualitatively at the To vc(s)@ Immersion all applied point using a tabular metal porous body. junction by diffusion combination arises by a misfire dawn method between Good age t The, 1 Smelting object, and a tabular metal porous body - infiltration arises after it at the bonded surface and metal porous body part of ingot objects and a metal porous body by the infiltration material arranged beforehand at the peripheral part of the metal porous body. The ingot objects in a misfire dawn method are Bath iron making, Bath steelmaking and department kind metal of others, a casting of an alloy, etc., and a metal porous body is the green compact produced by carrying out compression molding of the metallic powder, or its sintered compact produced by all sintering, and infiltration material is a metal porous body part and junction = 5. - 4- A field is absorbed and permeated and it is the metal in which the melting point is lower than any thru/or the alloy of ingot objects and a metal porous body. Next, all the connected surface Emery polish papers etc. of the ingot objects to which it will be first supposed that Contact @ is performed if an uninvented embodiment is explained about place @ which joins two cylindrical ingot objects, It ground so that the coarseness might be set to about 2 micrometers or less, and it was fabricated by tabular [ which is subsequently spread good 1 / of about three or less trunks of Is ], as for the connected surface of the metal porous body which comprises the green compact produced by carrying out all the metallic powder compression molding, or this sintered compact produced by all sintering, the coarseness is set to about 2 micrometers or less -- as -- polish -- it grinds that it is Breathable. If the thickness of this tabular metal porous body very only becomes thick, many infiltration material must be used and it will become uneconomical. - The range of 10~30 charge is preferred for the percentage of void again. On the other hand, what carried out compression molding of the metallic powder or the end of alloyed powder it has the melting point lower than any of the above-mentioned ingot objects and a metal porous body to the shape corresponding to the perimeter or inner circumference of a joined part of a zygote is used as infiltration material. The opening of the Hub above-mentioned metal porous body may be made into a quantity required to -6= Bury, and the quantity of this infiltration material does not have to increase it superfluously. Subsequently, it assembles so that it may become a form of the above-mentioned ingot object sound request, and it is this Wear about the above-mentioned tabular metal porous body in this case. It arranges to the joined part of a A bath object. That is, as shown in accompanying drawing 1st figure (Ro) l, tabular nature object 3 of metal strip-11 is arranged between ingot objects 1 and ingot objects 2, the shape of sandwiches is used, and -10,000 and infiltration material are arranged to the peripheral part of metal porous body 3 and ingot objects 1.2, as shown in this figure. arrangement of the infiltration material -- this position -- most -- Wishful -- . That reason is for the infiltration material not to leave the remnants of infiltration material to carrying out the duty preventing Contact and the needle side of ingot objects and a metal porous body from oxidization of Katana mouth enthusiasm, and a bonded surface by arranging infiltration material in this position. Since remnants will remain in a bonded surface after the end of a junction process and the fall of junction intensity will be caused if the infiltration material is arranged to a bonded surface, it is not desirable. Next, what was assembled in this way is heated under press under a vacuum atmosphere or in non-oxidizing atmosphere. In under a vacuum atmosphere, it is not necessary to use a diffusion pump for the degree of vacuum about]O"torr to be enough, and expensive etc., and it can use a cheap oil rotary vacuum pump. One or more 5 kgf/cr(s) and a 10 kgf/crl grade may be sufficient as press. Heating temperature is determined by the quality of the material of ingot objects, a metal porous body, and infiltration material. That is, the temperature is below the melting point of ingot objects and a metal porous body, and is more than - melting point of infiltration material. For example, when joining the ingot objects of iron or steel, Sword day heat temperature is a]100~1250-degreeC grade, using a copper alloy as infiltration material. After carrying out for [ several minute~60 minutes ] grade Maintenance at this temperature, it cools by A room i=t. 2nd [ The ] figure (b) and (Ro) of a Attachment drawing are a mimetic diagram after the completion of junction, and are a That 11 it horizontal sectional view and a vertical cross section. As shown in these figures, infiltration material 4 absorbs or permeates metal porous body 3 and near the bonded surface, and does not remain outside. The joining method of uninvented ingot objects is simple, without strict [ not winning popularity but ] all the [ which cooks one restrictions of a form ] working condition needing, and is the outstanding method of having junction power firm moreover enough. Next, it is un-inventing by an example? It explains still in detail. Example 1 The disc-like iron sintered compact of the 12-mmin diameter 5 thickness 2.8 tone was made to intervene among these for the purpose of carrying out two ingot object total conjugation of carbon steel 810C for machinery structures which has diameter 12 Fragile and a 20-m-high size. Relative density is 0.78 and this iron sintered compact has 22 charges' percentage of void. In the assembly, it ground in the Emery polish paper of each bonded surface i] No. 000 of ingot objects and an iron sintered compact. Subsequently, infiltration material with the weight of 0 or 62 g which comprises the green compact in the end of mixed powder which has [5% of iron powder in copper powder has been arranged to the peripheral part of the above-mentioned iron sintered compact. Next, it puts into the electric furnace of the degree of vacuum of these thing A leopard 10'torr(s) of all the, is the bottom of press of ] and Okgf/c A, and a heating rate of 330 degreeper hour C, and is 1].

The ingot objects which held for 30 minutes, subsequently cooled to room temperature, and were firmly joined at Raise the temperature and its temperature to 40degreeC were acquired. When the tensile test of this thing was done, the fracture arose from the body part made from slocg, and a bonded surface did not exfoliate. That is, it turns out that the intensity of a bonded surface is more than the intensity of 5IOC ingot objects. The tensile strength in this case is 3]. It is -2 kgf/mj and this is the intensity of the 5IOC ingot object itself. Example 2 Example]

It is Example ] except changing into the thing of the iron sintered compact part which can be boiled and set, and relative density 0.98.

Contact @ of 5IOC ingot objects was completely performed in a similar manner. When the tensile test of the obtained zygote was done, tensile strength was a little inferior to intensity 3] which is 29.5kgf△ Research and was shown in Example 1, and 2kgf/-. Appointed and a fracture had taken place from the bonded surface or the iron sintered compact part.

[Brief Description of the Drawings]

When carrying out ingot object total conjugation of Drawings 1 and 2 by a misfire dawn method, respectively, they are mimetic diagrams after wavering Complete, and (b) is a horizontal sectional view (it is a mouth 1fd vertical cross section.), As for 'T and numerals 1 and 2 in a figure, a metal porous body and 4 are infiltration material ingot objects and 3. Boundary 1 time (b) (Ro) 21 sides of ' seats (b) (Ro)