用鈮和鉭的碳化物作基體制成的硬質(zhì)合金，有很高的強(qiáng)度和抗壓、耐磨、耐蝕本領(lǐng)。在所有的硬質(zhì)化合物中，碳化鉭的硬度是最高的。用碳化袒硬質(zhì)合金制成的刀具，能抗得住三千八百度以下的高溫，硬度可以與金剛石匹敵，使用壽命比碳化鎢更長(zhǎng)。上一頁 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] 下一頁 |
