• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A compound metallic body for manufacturing steel pipes having an internal lining of special steel or alloy, such compound metallic body being produced from a steel billet 12 comprising an axial core 14 of special steel or alloy, said billet and core being jointly subjected to an upsetting operation and subsequently drilled by a suitable tool 16, whereby perfect metallurgical cohesion is obtained.
    公开号:SU1431664A3
    申请号:SU833544253
    申请日:1983-01-13
    公开日:1988-10-15
    发明作者:Мария Бильбао Егигрен Хесус；Игнасио Мартинес Гарин Де Ласкано Хосе
    申请人:Хесус Мари Бильбао Егигрен и Хосе Игнасио Мартинес Гарин де Ласкано (ES)；
    IPC主号:
    专利说明:

    The invention relates to the processing of metals by pressure and can be used in the manufacture of bimets; 1ll pipes.
    The aim of the invention is to improve the quality of manufactured bimetallic pipes due to reliable connection (by the type of diffusion welding) between the shell and the core of a hollow semi-finished product for pressing the pipe, as well as reducing the complexity of the preparatory work by eliminating thorough preparation of the elements of the composite billet for the firmware.
     FIG. 1 shows a square ingot with a central circular aperture; in fig. 2 is a special alloy cylindrical core made by the size of the ingot opening; in fig. 3 — composite square preform in the form of a shell with a central core; .on FIG. 4 - a container with a composite billet laid in it before the beginning of its deformation, cross section; in fig. 5 - a container with a composite billet after its draft, a longitudinal section; in fig. 6 is a section A-A in FIG. five; in fig. 7 - schematically of different variants (a, B, 8) of the ratio between, diameter of the core of the upset billet and the diameter of the piercing punch; in fig. 8 - flashing process of the composite preform in the container; in fig. 9 - a container with a manufactured semi-finished product after flashing, longitudinal section; in fig. 10 is a sectional view of FIG. 9.
    The method is carried out as follows.
    As the initial blank, a usual square steel ingot with rounded edges is used, in which a longitudinal axial cylindrical hole is made (Fig.). A round csgtnmetal core (Fig. 2) made of special steel or alloy that completely fills the hole inside the ingot is inserted into this hole of the inner ingot, while the ends of the workpiece and core are carefully welded using electric welding, as a result of which another structure is formed from the fixed square billet (Fig. 3) in the form of a shell 1 with a core 2. After assembly is completed
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    billets are placed in a round container of a press adapted for sludge. The square section of the billet does not completely fill the inner space of the container (Fig. 4), i.e. there are free spaces between the four faces of the ingot and the inner cylindrical surface of the container. In the process of settling the workpiece, these spaces are filled with metal, as a result of which the square workpiece with the core placed in it turns into a solid cylindrical body tightly seated in container 3 (Fig. 5 and 6), and tight contact is achieved in the main surface of the shell 1 with the surface of the core 2 inside it. This operation of settling a square composite preform is the main condition for achieving the required quality of joining the constituent elements of a semi-finished product. However, during the precipitation process, the cross section of the core varies with respect to the cross section of the piercing punch for the next piercing operation depending on the difference in the deformation resistance (hot) values of the shell and core materials, as well as on the required thickness the inner lining of the manufactured extruded tube.
    Subsequent processing of the composite billet after precipitation consists in hot flashing, the successful implementation of which is influenced by such factors as the diameter of the piercing punch, strength (resistance to deformation) of the components of the billet in a hot condition, etc. The maximum allowable ratio of strengths (deformation resistances) of the constituent elements at the firmware temperature should be 2.5; 1 depending on the specific properties of the materials used. The maximum allowable ratio between the length of a square ingot and the diameter of a piercing mandrel (piercing punch) is 10: 1.
    The ratio between the diameter of the piercing punch 4 and the core 2 of the special steel of the alloy after the end of the precipitation should correspond to 143i6i
    The difference between the strength (strain resistance) values of the shell and core alloys. The diameter of the sewing punch may be equal to, greater than or less than the diameter of the core after the precipitation operation (Fig. 7) and may even be less than what the diameter of the core had before the beginning of the settlement of the workpiece. The diameter of the piercing punch is selected only in a logical relationship with the required thickness of the inner lining of the pipe. In this way, wide possibilities for varying the diameter of the piercing punch are provided. In addition, after the flashing operation, a strong metallurgical connection is reached in the obtained semi-finished product between the outer casing 5 and the inner lining 6 made of special steel or alloy (Fig. 9, 10), as in the firmware process (Fig. 8), In essence, diffusion pressure welding of elements 1 and 2 of the composite fabrication.
    Then the hollow semi-finished product is subjected to extrusion (extrusion through a point), as a result of which you get finished, ... products - a bimetallic pipe with an outer shell of ordinary steel and an inner lining of special steel of the Research Institute of Alloy.
    Example. A steel ingot with a length of 750 mm or 980 mm of square cross-section with radii of 40-45 mm is used in which a central axial hole is made, in order to place into it a cylindrical core of special steel or alloy filling the entire opening space in the ingot. The composite preform thus obtained is heated and placed in a press container, which is also used for subsequent piercing. Then, the billet is deposited in this container, as a result of which the spaces between the side edges of the ingot and the inner surface of the container are filled until the round section of the billet is obtained. This completely fills the inner space of the container and at the same time ensures a reliable connection of all the surfaces of the shell and core that are in contact. Bimetallic billet obtained
    40
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    It is then subjected to closed firmware in the same container using a piercing punch with a diameter of 60-300 mm, depending on the power of the press.
    The pierced hollow semi-finished product is used to press the bimetallic tube. The thickness of the inner lining of a bi-, metal pipe with a wall thickness of 3-60 mm can vary from a minimum value of 1 mm WID to 10% of the pipe wall thickness, to a maximum value equal to 50% of the pipe wall thickness after extrusion (extrusion through a point). ). This ensures a reliable metallurgical connection of the inner lining of the pipe with its outer casing without careful preparation of the surfaces of the elements of the composite preform. As a result, the operational reliability of extruded bimetallic pipes will increase.
    权利要求:
    Claims (3)
    [1]
    1. A method of manufacturing semi-finished products for pressing bimetallic pipes made of composite materials, namely, that a central axial hole is made in an ingot, a cylindrical core made of corrosion-resistant steel according to the size of an ingot opening is placed into it, and the resulting composite billet is subjected to closed firmware punch in a round section container, characterized in that, in order to improve the quality of the products obtained and reduce the labor intensity of the preparatory work, an ingot is used square cross-section, and before stitching the composite billet is deposited in the same container until the cylindrical shape of its outer surface is obtained.
    [2]
    2. The method according to claim 1, characterized in that the ingot is used with a dipine greater than the diameter of the piercing punch in no more than
    10 times.
    [3]
    3. The method according to claim 1, about tl and .4 a - y i and so that the maximum acceptable ratio of the deformation resistance of the materials of the ingot and core at the piercing temperature is 2.5: 1.
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    类似技术:
    公开号 | 公开日 | 专利标题
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    US3761257A|1973-09-25|Method of making a composite heavy duty bushing
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    US5940951A|1999-08-24|Process for the manufacture of cladded metal pipes
    US2986273A|1961-05-30|Metal junction piece and the production thereof
    US4487357A|1984-12-11|Method for forming well drill tubing
    SU1431664A3|1988-10-15|Method of manufacturing semifinished items for forming of bimetallic pipes
    US4059214A|1977-11-22|Forging process
    US1377266A|1921-05-10|Process for manufacturing metal rings
    US4356612A|1982-11-02|Method of producing a forged product
    US2397370A|1946-03-26|Manufacture of cartridge cases and the like
    US7207231B2|2007-04-24|Rack gear and method of making same
    US3564566A|1971-02-16|Process and fabrication of tapered titanium and/or other alloy extrusions
    US4364162A|1982-12-21|Process for the after-treatment of powder-metallurgically produced extruded tubes
    US3316630A|1967-05-02|Clad body manufacture
    US3149415A|1964-09-22|Method of producing welded bimetallic tubular connections
    RU2131787C1|1999-06-20|Method for making thin-wall axially symmetrical vessels
    US3025765A|1962-03-20|Segmented ring-type refractory metal liners for guns
    US4373012A|1983-02-08|Casings and pressed parts utilized for the extrusion of articles, particularly pipes, and manufacturing process of such casings and pressed parts
    EP0865938A1|1998-09-23|Method of producing light alloy wheels
    US2373921A|1945-04-17|Steel cartridge case
    US4410309A|1983-10-18|Method of making a spark-plug center electrode
    US2388094A|1945-10-30|Cartridge case
    JP2003305524A|2003-10-28|Method of manufacturing engine valve
    同族专利:
    公开号 | 公开日
    JPS58128594A|1983-08-01|
    ES8300523A1|1982-11-01|
    CA1194348A|1985-10-01|
    DE3364107D1|1986-07-24|
    JPH0313933B2|1991-02-25|
    US4598856A|1986-07-08|
    EP0084817B1|1986-06-18|
    EP0084817A1|1983-08-03|
    ES508733A0|1982-11-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2107943A|1936-06-05|1938-02-08|Kellogg M W Co|Method of manufacturing composite seamless tubes|
    US3038251A|1957-11-20|1962-06-12|United States Steel Corp|Method of forming an upset on the end of a tube|
    US3376118A|1965-01-05|1968-04-02|Mannesmann Ag|Metallic composite article|
    GB1095798A|1965-04-09|1967-12-20|Stahl Und Walzwerk Riesa Veb|A method of producing bimetallic tubular bodies|
    US3648351A|1968-12-16|1972-03-14|Ball Corp|Method of forming a hollow composite article by extrusion|
    JPS4924871A|1972-06-12|1974-03-05|
    DE2605236C2|1976-02-11|1982-12-30|Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg|Use of a piercer and a die to produce a perforated piece|
    US4015765A|1976-05-10|1977-04-05|Western Electric Company, Inc.|Formation and utilization of compound billet|
    JPS5711754B2|1979-09-20|1982-03-06|CA2003295C|1988-12-09|1995-07-04|Yoshihisa Ohashi|Process for manufacturing clad metal tubing|
    GB9008273D0|1990-04-11|1990-06-13|Ici Plc|Manufacture of bi-metallic tube by explosive bonding,hot extrusion and co-extrusion|
    US6176414B1|1999-11-08|2001-01-23|Kulicke & Soffa Investments, Inc.|Linkage guided bond head|
    TW200610122A|2004-09-14|2006-03-16|P Kay Metal Inc|Soldering process|
    TWI542419B|2014-12-02|2016-07-21|Metal Ind Res & Dev Ct|Composite pipe and its manufacturing method|
    US11229934B2|2019-01-17|2022-01-25|Ford Global Technologies, Llc|Methods of forming fiber-reinforced composite parts and fiber-reinforced composite parts formed thereby|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ES508733A|ES8300523A1|1982-01-14|1982-01-14|A compound metallic body.|
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