The results show that the hardness of H13 steel after annealing depends on size, relative amount and type of carbide.

明确了H13钢退火后硬度的高低与碳化物粒子的大小、相对量及碳化物的类型的依赖关系。

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The results show that the average absolute value of relative errors between predictive and measured values of hardness is 5.90%, the prediction accuracies of adhesion and impact resistance are 100%.

结果表明：硬度预测值与实验值相对误差的绝对值的平均值为5.90%，附着力预测准确率为100%，耐冲击性预测准确率为100%。

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The results showed that the relative density and Brinell hardness decreased while the electrical resistivity increased with the increase of graphite content.

研究发现，随着复合材料中石墨含量的增多，材料的相对密度、布氏硬度值降低，电阻率升高。

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