论文部分内容阅读
氮化硅陶瓷作为切削刀具材料,国内已有单位研制,并已日益在生产中使用。无压烧结氮化硅(Si_3N_4)是采用氮化硅粉末为原料加入镁铝尖晶石和稀土氧化物等添加剂,在常压下使氮化硅烧结而成。它具有高强度、高密度和价廉的特点.英国Lucas公司生产的无压烧结氮化硅(牌号101、201),其室温抗弯强度可达780～800MPa、硬度HRA91～92,对于普通铸铁,有色金属以及镍基合金的高速车、铣加工具有很大的优越性。
Silicon nitride ceramic cutting tools as materials, domestic units have been developed and has been increasingly used in production. Pressureless sintering of silicon nitride (Si_3N_4) is the use of silicon nitride powder as raw material to join magnesium aluminate spinel and rare earth oxides and other additives, made of silicon nitride sintered at atmospheric pressure. It has the characteristics of high strength, high density and low cost.Unless pressure sintered silicon nitride (grade 101,201) made by Lucas Company of UK has a room temperature flexural strength of 780 ~ 800MPa and a hardness of HR91 ~ 92. For ordinary cast iron , Non-ferrous metals and nickel-based alloy high-speed car, milling has great advantages.