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阐述了锌铝合金取代铜合金的意义，介绍了锌铝合金保持架的铸造成形工艺及性能指标．并指出目前锌铝合金保持架推广应用所存在的困难和尚待解决的问题。
The significance of substituting zinc-aluminum alloy for copper alloy is expounded. The casting forming process and performance index of zinc-aluminum alloy cage are introduced. And points out the difficulties and problems to be solved in the popularization and application of zinc-aluminum alloy cage.