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铝高速钢(W6Mo5Cr2Al)是近十年来出现的适合我国资源特点的超硬型高速钢种。它有很高的常温硬度和高温硬度,有优良的机械性能和切削性能。其淬火硬度可达HRC67～39,比W18Cr4V高HRC2～4,在500℃时的硬度为HRC62,在600℃时仍保持HRC54～55,比W18Cr4V高HRC4～6。这种铝高速钢的抗弯强度为290～390公斤力/毫米~2,与W18Cr4V相当。长期以来,我厂精车机车车轴外圆和车轮轮心内孔都应用普通型高速钢(W18Cr4V或W9Cr4V2)车刀。由于普通型高速钢刀具的(?)硬性和耐磨性较差,所以在加工中,
Aluminum high-speed steel (W6Mo5Cr2Al) is a type of super-hard high-speed steel suitable for the characteristics of our country in recent ten years. It has a very high temperature and high temperature hardness, with excellent mechanical properties and cutting performance. Its hardness can reach HRC67 ~ 39, higher than W18Cr4V HRC2 ~ 4, the hardness at 500 ℃ is HRC62, keep HRC54 ~ 55 at 600 ℃ and HRC4 ~ 6 higher than W18Cr4V. The bending strength of this aluminum high-speed steel 290 ~ 390 kg / mm ~ 2, and W18Cr4V quite. For a long time, our factory fine car locomotive axles and wheels wheel center hole are common type high-speed steel (W18Cr4V or W9Cr4V2) turning tool. As the ordinary high-speed steel cutting tool (?) Hardness and wear resistance is poor, so in processing,