中磷白口铸铁的宏观硬度和显微硬度高于普通白口铸铁，但冲击韧性略有降低。
The hardness and its microhardness of medium phosphorus white cast iron are higher than those of the common white cast iron, but its impact toughness slightly decreases.
该技术采用微合金化，利用正交试验设计方法，对不同成分搭配的试样进行宏观硬度和冲击韧性测试，优化了合金成分。
The composition was optimized by tiny alloying, orthogonal test design and the hardness and impact toughness test for the different samples with different combination of alloy composition.
采用宏观分析、显微检验和硬度测定对压铸模进行了失效分析。
This failure analysis was performed by using macro check, micrography and hardness measurement.
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