中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

84 records (took 0.023 seconds)

    SURFACE TREATMENT OF AUSTENITIC NI-FE-CR BASED ALLOYS
    73.
    发明专利
    SURFACE TREATMENT OF AUSTENITIC NI-FE-CR BASED ALLOYS 未知

    公开(公告)号：CA2466829A1

    公开(公告)日：2003-06-05

    申请号：CA2466829

    申请日：2001-11-23

    Applicant: INTEGRAN TECHNOLOGIES INC

    Inventor： LIN PETER K ,  LIMOGES DAVID L ,  PALUMBO GINO

    IPC: C21D7/04 ,  C21D7/06 ,  C21D9/50 ,  C21D10/00 ,  C22F1/00 ,  C22F1/10

    Abstract: A surface treatment process for enhancing the resistance to intergranular corrosion and intergranular cracking of components fabricated from austeniti c Ni-Fe-Cr based alloys comprising the application of surface deformation to t he component, to a depth in the range of 0.01 mm to 0.5 mm, for example by high intensity shot peening below the recrystallization temperature, followed by recrystallization heat treatment, preferably at solutionizing temperatures. The surface deformation and annealing process can be repeated to further optimize the microstructure of the near-surface region. Following the final heat treatment, the process optionally comprises the application of further surface deformation (work) of reduced intensity, yielding a worked depth of between 0.005 mm to 0.01 mm, to impart residual compression in the near surface region to further enhance cracking resistance.

    Perforated current collectors for storage batteries and electrochemical cells, having improved resistance to corrosion
    74.
    发明专利
    Perforated current collectors for storage batteries and electrochemical cells, having improved resistance to corrosion 未知

    公开(公告)号：AU6198201A

    公开(公告)日：2001-12-11

    申请号：AU6198201

    申请日：2001-05-24

    Applicant: INTEGRAN TECHNOLOGIES INC

    Inventor： LIMOGES DAVID L ,  PALUMBO GINO ,  LIN PETER K ,  TOMANTSCHGER KLAUS

    IPC: H01M4/74 ,  C22F1/12 ,  H01M20060101 ,  H01M4/68 ,  H01M4/73 ,  H01M4/82

    Abstract: A process for enhancing chemical stability and corrosion resistance is described for perforated current collectors made by continuous production processes for use in electrochemical cells, including storage batteries such as lead-acid batteries. The process relies on utilizing a strip processing method, selected from the group of reciprocating expansion, rotary expansion and punching, to perforate the solid metal strip to form a grid or mesh, as a deformation treatment. The perforation-deformation treatment is followed in rapid succession by a heat-treatment to obtain a recrystallized microstructure in the current collector and optionally by quenching to rapidly reduce the temperature to below approximately 80° C. The process yields an improved microstructure consisting of a high frequency of special low Sigma CSL grain boundaries (>50%), exhibiting significantly improved resistance to intergranular corrosion and cracking. Perforated current collectors produced with this process from a solid lead-alloy strip exhibit superior growth and corrosion properties when employed as positive grids in a lead-acid battery.

    Metallurgical process for manufacturing electrowinning lead and lead alloy electrodes
    75.
    发明专利
    Metallurgical process for manufacturing electrowinning lead and lead alloy electrodes 未知

    公开(公告)号：AU740002B2

    公开(公告)日：2001-10-25

    申请号：AU8620498

    申请日：1998-08-04

    Applicant: INTEGRAN TECHNOLOGIES INC

    Inventor： LEHOCKEY EDWARD M ,  PALUMBO GINO ,  LIN PETER KENG-YU ,  LIMOGES DAVID L

    IPC: C22C11/00 ,  C22F1/00 ,  C22F1/12 ,  C25C7/02

    Abstract: Lead and lead-alloy anodes for electrowinning metals such as zinc, copper, lead, tin, nickel and manganese from sulfuric acid solutions, whereby the electrodes are processed by a repetitive sequence of cold deformation and recrystallization heat treatment, within specified limits of deformation, temperature and annealing time, to achieve an improved microstructure consisting of a high frequency of special low SIGMA CSL grain boundaries (i.e.>50%). The resultant electrodes possess significantly improved resistance to intergranular corrosion, and yield (1) extended service life, (2) the potential for reduction in electrode thickness with a commensurate increase in the number of electrodes per electrowinning cell, and (3) the opportunity to extract higher purity metal product.

    THERMO-MECHANICAL TREATED LEAD ALLOYS
    76.
    发明公开
    THERMO-MECHANICAL TREATED LEAD ALLOYS 审中-公开
    形变热处理合金铅

    公开(公告)号：EP1461470A4

    公开(公告)日：2005-09-14

    申请号：EP01989121

    申请日：2001-11-26

    Applicant: INTEGRAN TECHNOLOGIES INC

    Inventor： PALUMBO GINO ,  AUST KARL T ,  LIMOGES DAVID L ,  GONZALEZ FRANCISCO ,  TOMANTSCHGER KLAUS ,  LIN PETER K

    IPC: C22C11/06 ,  C22F1/00 ,  C22F1/12 ,  H01M4/68 ,  C22C11/00

    Abstract: Recrystallized lead and lead alloy positive current collectors and connectors such as straps and lugs for use e.g. in lead acid batteries and electrowinning anodes, having an increased percentage of special grain boundaries in at least part of the microstructure, which have been provided by a process comprising of (i) cold or hot rolling or cold or hot extrusion or (ii) steps of deforming the lead or lead alloy, and subsequently annealing the lead or lead alloy. Either a single cycle of working and annealing can be provided, or a plurality of such cycles can be provided. The amount of deformation, the recrystallization time and temperature, and the number of repetitions of such steps are selected to ensure that a substantial increase in the population of special grain boundaries is provided in the microstructure, to improve resistance to creep, intergranular corrosion and intergranular cracking of the current collectors and connectors during battery service, and result in extended battery life and the opportunity to reduce the size and weight of the battery.

Patent Agency Ranking