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    • 6. 发明授权
    • Process for producing a thixocast semi-molten material
    • 生产触变半熔融材料的方法
    • US5925199A
    • 1999-07-20
    • US755296
    • 1996-11-22
    • Haruo ShiinaNobuhiro SaitoTakeyoshi Nakamura
    • Haruo ShiinaNobuhiro SaitoTakeyoshi Nakamura
    • B22D18/02B22D17/00B22D17/30B22D27/09C22B9/16C22C1/00C22C1/02C22C21/02B22D27/02B22D27/04C22F1/00
    • C22C1/005B22D17/007B22D17/30Y10S164/90
    • Solid and liquid phases coexist in a semi-molten casting material. A plurality of composite-solid phases having liquid and solid phase regions and a plurality of single-solid phases exist as the solid phases in a mixed state in an outer layer portion of the semi-molten casting material. If the sectional area of the solid phase region is represented by A, and the sectional area of the solid phase region is represented by B in one of the composite-solid phases, the liquid phase enclosure rate P of the composite-solid phase is defined as being represented by P={B/(A+B)}.times.100 (%). The liquid phase enclosure rate P of the single-solid phase is equal to 0 (%). When two groups are selected from a class of the solid phases, for example, by first and second straight lines so as to include a plurality of the solid phases, average values M.sub.1 and M.sub.2 of liquid phase enclosure rates of, for example, six solid phases in each of the first and second groups are represented by M.sub.1 =(P.sub.1 +P.sub.2 - - - +P.sub.5 +P.sub.6)/6 and M.sub.2 =(P.sub.7 +P.sub.8 - - - +P.sub.11 +P.sub.12)/6, and an average value M.sub.M of the average values M.sub.1 and M.sub.2 is set in a range of M.sub.M .gtoreq.20%. This inhibits the flow-out of the liquid phases from the outer layer portion in the thixocast semi-molten casting material.
    • 固体和液相在半熔融铸造材料中共存。 在半熔融铸造材料的外层部分中,以混合状态存在多个具有液相和固相区域以及多个单相固相的复相固相。 如果固相区域的截面积由A表示,并且固相区域的截面积在复合固相之一中由B表示,则复合固相的液相封闭率P被定义 由P = {B /(A + B)}×100(%)表示。 单相固相的液相封闭率P等于0(%)。 当从一类固相中选择两组时,例如通过第一和第二直线选择包括多个固相,液相封装速率的平均值M1和M2例如为六个固体 第一组和第二组中的每一个的相位由M1 =(P1 + P2 - - + P5 + P6)/ 6和M2 =(P7 + P8 - - + P11 + P12)/ 6表示,平均值 将平均值M1和M2的MM设置在MM> / = 20%的范围内。 这就抑制了在thixocast半熔融铸造材料中从外层部分流出的液相。
    • 7. 发明授权
    • Thixocasting process
    • Thixocasting过程
    • US5803154A
    • 1998-09-08
    • US766031
    • 1996-12-16
    • Takeshi SugawaraNobuhiro Saito
    • Takeshi SugawaraNobuhiro Saito
    • B22D17/00B22D17/30B22D17/32B22D18/02B22D23/00
    • B22D17/007Y10S164/90
    • In a thixocasting process, a casting material is subjected to a heating treatment to prepare a semi-molten casting material having solid and liquid phases coexisting therein, and then, the semi-molten casting material is poured into a cavity under a pressure. A through-hole for applying a constricting effect to the material is provided in a flow path for the semi-molten casting material leading to the cavity in a casting mold. A material deforming pressure P.sub.1 immediately before the semi-molten casting material flows into the through-hole is used as a parameter. For example, the material deforming pressure P.sub.1 is equal to or lower than 6.7 MPa, it is determined that the material is satisfactorily filled in the cavity.
    • 在触媒处理中,对铸造材料进行加热处理以制备其中固相和液相共存的半熔融铸造材料,然后将半熔融铸造材料在压力下倒入空腔中。 在用于铸造模具中的空腔的半熔融铸造材料的流动路径中设置用于对材料施加收缩效果的通孔。 将半熔融铸造材料流入通孔之前的材料变形压力P1用作参数。 例如,材料变形压力P1等于或低于6.7MPa,则确定材料令人满意地填充在空腔中。