清华大学北京方大高科技陶瓷公司在承担首批国家产学研项目中研制成功的氮化硅陶瓷刀具，解决了陶瓷刀具抗冲击韧性问题，买现对多种难加工材料（淬硬钢，冷硬铸铁）的车削。长期以来，上海宝钢在轧辊生产中，由于工件硬度高达ＨＲＣ６２，须采用砂轮磨削工艺，因而成本高... Tsinghua University, Beijing Fangda high-tech ceramics company in the commitment to the first batch of national production and research projects in the successful development of silicon nitride ceramic tool to solve the impact resistance of ceramic cutting tool toughness, buy a variety of difficult to process materials (hardened steel, cold Hard cast iron) turning. For a long time, Shanghai Baosteel in the roll production, due to the hardness of the workpiece up to HRC62, to be used grinding wheel grinding process, and therefore high cost ...