在 yg类硬质合金的基础上添加 tac (nbc),提高了常温、高温硬度与强度、抗热冲击性和耐磨性,可用于加工铸铁和不锈钢。 (4)钨钛钽钴类( wc+tic+tac+co) )硬质合金 (yw) 在 yt类.
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