在一定磨损条件下，中硬度钢比高硬度钢耐磨。
Under certain wear condition the wear resistance of 45 steel with medium hardness is higher than that with high hardness.
复合变质处理使该合金中硅相细化，使布氏硬度提高50%，硬度可达 HB84.9。
The hardness of the alloys which is modified is advanced by about 50%, appropinquity HB84.9.
在与硬度法的对比试验中，进一步验证了电阻法的可行性。
The feasibility of this method is confirmed by comparison with microhardness method.
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