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随着我国机械工业的迅速发展,超硬度的新型材料不断涌现,各种高强度、高硬度、高耐磨性能的另件材料将愈来愈多地被采用。武钢新三轧及其它厂的备品备件大都属硬质难加工材料,因而对切削刀具的材质及切削工艺提出了更高的要求。刀具材质不仅要具有高硬度、高耐磨性能,而且要有较好的韧性和抗热冲击性能。因此刀具材料必将随着切削加工工艺技术的不断革新而改进品种、提高质量。新型复合氮化硅刀具,具有硬度高、冲击性能好等特性,因而耐磨、寿命长(见图1～3和表1);断裂韧性是Al_2O_3基刀具的
With the rapid development of China’s machinery industry, new materials with super-hardness emerge constantly and more and more materials of various high strength, high hardness and high wear resistance will be used more and more. Most of the spare parts of WISCO’s new three-rolling mill and other plants are hard and hard-to-be-processed materials, thus putting forward higher requirements on the cutting tool material and cutting technology. Tool material not only has high hardness, high wear resistance, but also have good toughness and thermal shock resistance. Therefore, the cutting tool materials will be with the continuous improvement of cutting-edge technology and improve the variety and improve quality. New composite silicon nitride tool, with high hardness, impact performance and other characteristics, and therefore wear-resistant, long life (see Figure 1 ~ 3 and Table 1); fracture toughness is Al_2O_3-based tool