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以氨水为主要渗剂加入含S、B、C、N、O物质滴入炉内,在550-560℃温度时对高速钢刀具进行五元共渗2小时。按国家标准对HRC 36-40的30CrMnSiA钢进行钻孔试验表明,耐用度提高约2倍。五元共渗与氧氮化相比,刀具第一次使用的耐用度约提高50%,刃磨后约提高1倍。经对渗层进行显微硬度、金相及电镜分析、结构分析和微区成分分析表明,耐用度的提高是由于表面形成硫化物和氧化物,而且由于轻微的松孔可以贮油而起到润滑、减磨、抗粘结和降低切削热的作用;扩散层渗入了氮和碳提高了显微硬度和热硬性,改善了切削性能。硼的作用机理有待深入探讨。
Ammonia as the main penetration agent added with S, B, C, N, O material dropped into the furnace, at 550-560 ℃ temperature for high speed steel cutting tool for five yuan percolation 2 hours. According to national standards on HRC 36-40 30CrMnSiA steel drilling tests showed that durability increased by about 2 times. Compared with oxynitriding, Wuyuan co-infiltration increased the durability of the knife for the first time by about 50% and increased about 1 times after sharpening. The microhardness, metallographic and electron microscopic analysis, structural analysis and micro-area composition analysis of the coating showed that the improvement of durability was due to the formation of sulfides and oxides on the surface and the storage of oil due to slight loose pores Lubrication, anti-wear, anti-adhesive and reduce the role of cutting heat; diffusion layer infiltration of nitrogen and carbon to improve the microhardness and thermosetting, improved cutting performance. The mechanism of boron needs to be further explored.