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19 records (took 0.02 seconds)

    12.
    发明专利
    未知

    公开(公告)号：FR2603901B1

    公开(公告)日：1988-11-18

    申请号：FR8612895

    申请日：1986-09-11

    Applicant: SERVIMETAL

    Inventor： SCHWEGLER PATRICE ,  DEBRIE JEAN-JACQUES ,  CLEMENT BERNARD ,  MOREAUX FRANCOIS ,  OLIVIER JACQUES

    IPC: C21D1/55 ,  C21D1/63

    Abstract: The invention concerns an apparatus for studying quenching fluids and quenchability of materials in the form of testpieces 5, comprising a heating furnace, a means for introducing each testpiece into the quenching liquid and extracting the quenched testpiece, a quenching tank 20 containing the quenching fluid and a means for circulating the quenching fluid. According to the invention, the quenching tank 20 comprises an upper tank 21 and a lower tank 22 connected by a means 27 for organizing the circulation, the upper tank being provided with an immersed injector 40 formed by at least one circular array comprising a plurality of radial nozzles and connected to a pressurized fluid source 30, the upper part of the upper tank comprising a conduit 39 for returning the fluid to the pressurization means 30, the lower tank 32 comprising a separate pressurized fluid intake, which apparatus includes means for regulating the temperature of the fluid and means for measuring the speed of the fluid.

    Aqueous quenching agent for light aluminium-base alloys
    15.
    发明专利
    Aqueous quenching agent for light aluminium-base alloys 未知

    公开(公告)号：GB2131836A

    公开(公告)日：1984-06-27

    申请号：GB8333466

    申请日：1983-12-15

    Applicant: SERVIMETAL

    Inventor： MOREAUX FRANCOIS ,  NAUD JEAN-MICHEL ,  OLIVIER JACQUES ,  SCHOCH ELISABETH ,  REYROL FRANCOISE ,  DUBOST BRUNO

    IPC: C21D1/60 ,  C22F1/00

    Abstract: An aqueous quenching agent for aluminium-base alloys comprises from 0.1 to 30% by weight of polyoxyalkylene glycol ether having a molecular weight of from 4000 to 30000 and preferably from 10000 to 12000 or from 20000 to 25000 and from 0.5 to 15% by weight of anti- corrosion additive that is an alkanolamine salt of a C7-13 oxo acid or an alkanolamine cinnamate, the balance being water, with a preferential composition of from 5 to 20% by weight of the polyoxyalkylene glycol ether and from 2 to 10% by weight of the additive. Preferably, the quenching agent comprises from 12 to 15% by weight of Emkarox FC 31/45000 and from 4 to 5% of I.P.9.

    Surface diffusion hardening of metals in fused salt bath - by injecting diffusing element as gaseous cpd. into the bath
    19.
    发明专利
    Surface diffusion hardening of metals in fused salt bath - by injecting diffusing element as gaseous cpd. into the bath 未知

    公开(公告)号：FR2416272A1

    公开(公告)日：1979-08-31

    申请号：FR7803726

    申请日：1978-02-03

    Applicant: SERVIMETAL

    Inventor： OLIVIER JACQUES ,  MANOIR PIERRE DU ,  GUERIT PIERRE ,  POLLET GILBERT

    IPC: C23C8/40 ,  C23C9/00

    Abstract: In a method of diffusing one or more elements into a metal surface by immersing the metal in a fused salt bath into which the element(s) is introduced as a compound in the gaseous or vapour state or is liberated by pyrolyis of the cpd., the cpd. introduced in admixture with an inert gas in the form of fine bubbles. The method is es. useful for carburising, nitriding, carbonitriding, sulphidising or boridising steel and other metals such as Ti and Zr. It avoids toxic cpds. (cyanides) in the bath, makes use of molten alkali (ne earth) halides which are removed easily from metal surfaces, improves control of carburising potential, gives surface hardnesses of >700 HV in small steel components after oil quenching, consumes less of the diffusing element, has low investment and maintenance costs, avoids salt regeneration and solid waste disposal problems, and gives more flexible operation (e.g. preheating and surface diffusion can be carried out in the same bath as well as successive different surface diffusion processes). Residual carbon in the bath, can be easily removed, e.g. by passing air or oxygen through the bath.

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