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The hardness of the alloys which is modified is advanced by about 50%, appropinquity HB84.9.
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。
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The hardness of the alloys which is modified is advanced by about 50%, appropinquity HB84.9;
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；
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