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对新型GV3高速钢丝锥与传统M2高速钢丝锥的切削性能、化学成分和热处理后的微观组织进行了对比分析。结果表明,GV3高速钢与M2高速钢相比,适当提高了含碳量,同时含有较多的V和W元素。V和W元素在钢中能形成均匀细小的VC和W2C碳化物,淬火过程中阻碍奥氏体晶粒的长大,形成细晶粒组织;回火过程中VC和W2C以极细小质点弥散析出,形成钢的二次硬化,不仅明显提高钢的硬度、耐磨性和红硬性,而且保持了良好的韧性和抗冲击性能。因此GV3钢丝锥不仅在常规切削速度(6.3 m/min)下具有良好的切削性能,而且在较高切削速度(10 m/min)下,仍然具有优良的切削性能。
The cutting performance, chemical composition and microstructure after heat treatment of the new GV3 high speed steel tap and traditional M2 high speed steel tap were compared. The results show that compared with M2 high-speed steel, GV3 high-speed steel has an appropriate increase of carbon content and contains more V and W elements. V and W elements in the steel can form even and small VC and W2C carbides, quenching process hinders the growth of austenite grains, the formation of fine-grained grain structure; tempering VC and W2C dispersed with very small particles , The formation of steel secondary hardening, not only significantly improve the hardness of steel, wear resistance and red hardness, and maintain good toughness and impact resistance. As a result, the GV3 tap has good cutting performance not only at normal cutting speeds (6.3 m / min) but also superior cutting performance at higher cutting speeds (10 m / min).