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    2.
    发明专利
    未知

    公开(公告)号：SE389957B

    公开(公告)日：1976-11-22

    申请号：SE7504800

    申请日：1975-04-25

    Applicant: ASEA AB

    Inventor： ISAKSSON S-E ,  LARKER H

    IPC: H05B3/62 ,  B22F3/15 ,  F27B5/04 ,  F27B17/00 ,  F27D1/00 ,  F27D11/02 ,  H05B3/64 ,  C04B35/18

    Abstract: A cylindrical elongated furnace for treating material at high temperature in a gaseous atmosphere under high pressure includes a vertical cylindrical pressure chamber for confining gas under pressure and a furnace space surrounded by a cylindrical heater formed of electrical resistor elements and insulation surrounding the furnace space and the heater. The insulation is formed by a cylindrical insulating sheath. The heater is built up of ceramic elements which form a cylinder with annular channels for the electrical resistor elements and supporting insulation surrounding and holding the ceramic elements together, such insulation having a low gas permeability and being formed of several layers of a tight felt impregnated with a hardening component. The leads for the heating elements are flat vertical elements arranged on the outside of the ceramic elements and formed with one or more bights projecting into the annular channels to reduce the free hanging length of the leads.

    5.
    发明专利
    未知

    公开(公告)号：SE411854B

    公开(公告)日：1980-02-11

    申请号：SE7613445

    申请日：1976-12-01

    Applicant: ASEA AB

    Inventor： GARVARE T ,  ISAKSSON S-E

    IPC: B22F3/14 ,  B22F3/12 ,  B22F3/15 ,  B30B11/00 ,  B22F3/00

    Abstract: Disclosed is a method and structure for manufacturing solid bodies from a quantity of powder. The powder is preformed and the preform is enclosed in a casing provided with an evacuation nozzle. The preform and the casing are preheated and the preform is degassed by evacuating the casing through the nozzle after the casing has been appropriately evacuated. The nozzle is then sealed by heating the same to forging temperatures, compressing the end thereof which is remote from the casing, cutting the compressed end of the nozzle to present a straight edge and thereafter welding the nozzle shut along said edge. After the nozzle has been sealed the same is enclosed in and surrounded by a gas tight hood and the space between the hood and the nozzle is filled with a fill material which may be a powder, an annular solid body or a combination of such body and a quantity of powder. After the nozzle has been appropriately shielded and covered by the hood and fill material, the casing with the powder preform therein is placed in a high pressure furnace where the preform is subjected to isostatic high pressure hot pressing.

    9.
    发明专利
    未知

    公开(公告)号：SE7613445L

    公开(公告)日：1978-06-02

    申请号：SE7613445

    申请日：1976-12-01

    Applicant: ASEA AB

    Inventor： GARVARE T ,  ISAKSSON S-E

    IPC: B22F3/14 ,  B22F3/12 ,  B22F3/15 ,  B30B11/00

    Abstract: Disclosed is a method and structure for manufacturing solid bodies from a quantity of powder. The powder is preformed and the preform is enclosed in a casing provided with an evacuation nozzle. The preform and the casing are preheated and the preform is degassed by evacuating the casing through the nozzle after the casing has been appropriately evacuated. The nozzle is then sealed by heating the same to forging temperatures, compressing the end thereof which is remote from the casing, cutting the compressed end of the nozzle to present a straight edge and thereafter welding the nozzle shut along said edge. After the nozzle has been sealed the same is enclosed in and surrounded by a gas tight hood and the space between the hood and the nozzle is filled with a fill material which may be a powder, an annular solid body or a combination of such body and a quantity of powder. After the nozzle has been appropriately shielded and covered by the hood and fill material, the casing with the powder preform therein is placed in a high pressure furnace where the preform is subjected to isostatic high pressure hot pressing.

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