热处理和凝固冷却方式对高硼高速钢显微组织和性能的影响
Effects of Heat Treatment and Cooling Way on Microstructure and Mechanical Properties of High-boron High Speed Steel
李 萍1, 杜忠泽1, 符寒光2, 戴建方3
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作者单位：(1. 西安建筑科技大学 冶金工程学院, 陕西 西安 710055; 2. 北京工业大学 材料科学与工程学院, 北京 100124; 3. 江苏东冶轧辊有限公司, 江苏 常州 213155)
中文关键字：高硼高速钢； 热处理； 硬度； 耐磨性
英文关键字：high-boron high speed steel; heat treatment; hardness; wear resistance
中文摘要：研究了冷却方式对高硼高速钢凝固组织的影响及热处理对其硬度和耐磨性的影响。研究发现：石英砂型试样的偏析大，共晶碳化物较粗，尺寸和厚度较大；石墨铸型试样碳硼化合物的尺寸细小且分布均匀性较好；1050 ℃淬火并525 ℃回火时，由于残余奥氏体量少，硬度达到最高值，其耐磨性最好。
英文摘要：The effects of cooling way and heat treatment on microstructure and properties of high-boron high speed steel were studied. The results show that the size and thickness of the quartz sand mould is bigger because of its eutectic carbide is thicker and the segregation is aggravating. The carbon-boron compound in graphite mould is fine and uniformity. Owing to residual austenite decrease, while quenching at 1050 ℃ and tempering at 525 ℃, the steel has high hardness and excellent wear resistance.