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    • 4. 发明申请
    • COMBINATION OF PROCESSES FOR MAKING WROUGHT COMPONENTS
    • 组合制作组件的过程
    • WO0114602A3
    • 2001-05-25
    • PCT/US0023267
    • 2000-08-24
    • SMITH & NEPHEW INCLONG MARKHUNTER GORDON
    • LONG MARKHUNTER GORDON
    • A61L27/04A61L27/06A61L31/02B22D15/00B22F3/17B22F3/22C22C1/00C22F1/00C22F1/10C22F1/18B22D23/00B22D27/04C21D7/02
    • B22F3/225A61L27/042A61L27/045A61L27/047A61L27/06A61L31/022B22D15/00B22F3/17B22F2998/00C22C1/005C22F1/00C22F1/10C22F1/183C22F1/186Y02P10/295B22F3/1055B22F3/115B22F3/22
    • The present invention combines pre-wrought processes with conventional forging processes to produce orthopaedic components at reduced cost and lead-time, but comparable to conventional forging in ductility and strength. In this invention, the wrought barstock used conventionally for forging feedstock is replaced with a preform, blank, bar or other pre-wrought material exhibiting the required ductile strength and refined grain structure to be forgeable. A critical aspect of this invention is that the fine grain structure of the pre-wrought material provides improved ductile strength and sufficient forgeability to the material. This bar or preform may then be forged to produce grain size refinement and increase in material integrity. Three categories of pre-wrought processes according to the invention include forming the material using metal molds; processes that achieve the necessary ductility and refined grain structure for wrought processing through rapid heat removal through the component or a quenching atmosphere or gas; and processes that achieve the necessary ductility and refined grain structure through consolidation of powder or semi-solid material under conditions which restrict coarsening of the grain structure.
    • 本发明将预锻造方法与常规锻造方法相结合,以降低成本和提前期生产矫形部件,但与常规锻造的延展性和强度相当。 在本发明中,常规用于锻造原料的锻造棒材被预成型件,坯料,棒材或其它预锻造材料所替代,所述预制件坯料具有所需的韧性强度和精制的晶粒结构以被锻造。 本发明的关键方面是,预锻造材料的细晶粒结构提供改进的延性强度和对材料的足够的可锻性。 然后可以将该棒或预成型件锻造以产生晶粒尺寸细化并增加材料的完整性。 根据本发明的三类预锻造方法包括使用金属模具形成材料; 通过部件或淬火气氛或气体快速除热,实现锻造加工所需的延展性和精细晶粒结构的工艺; 以及通过在限制晶粒结构的粗化的条件下固化粉末或半固体材料来实现必要的延展性和精细晶粒结构的工艺。