通过选择不同的热处理工艺对高铬铸铁试件进行热处理实验，然后对该试件做机械性能实验。

Trying an experiment of heat-treating to the high chromium cast iron samples in different heat treatment processes selected, then doing their mechanical performance experiment.

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这些有益的实验结果为电铸加工使用寿命长、机械性能好的模具提供了一定的依据。

These useful results provide scientific basis for the electroforming of moulds with long service time and excellent mechanical performances.

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认为将单向拉伸实验测出的机械性能指标直接用于板材成形是不妥当的。

It is not proper that the mechanical property parameter tested by one-way drawing is directly used in sheet forming.

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