轧辊用高硼高速钢铸态组织和性能研究.pdfVIP

（1）先进钢铁材料 轧辊用高硼高速钢铸态组织与性能研究 1 严 军，岑启宏，蒋业华，周荣 （昆明理工大学材料科学与工程学院，昆明650093） 摘要：针对高性能轧辊对材质的需求，本文研究了一种 W(B) 1.5%和W (C)=0.40%-0.50% 的高硼中碳高速钢，观察 并分析了其凝固组织与主要性能。结果表明：高硼高速钢的凝固组织为珠光体+少量铁素体基体、碳硼化合物和Fe2B 相共晶组织，共晶Fe2B 相和碳硼化合物呈网状形式沿晶界分布。随着B 含量的增加，共晶组织和硬质相体积分数明 显增加，合金硬度不断升高，韧性下降。在高硼高速钢的硬度与普通高速钢的相当的情况下，大大降低了高速钢的 生产成本，故可作为一种新型轧辊用材料。 关键词：轧辊；高硼高速钢；共晶组织；碳硼化合物 Research on Microstructure and Properties of High-boron High -Speed Steel for Roller YAN Jun, Cen Qihong, Jiang Yehua, Zhou Rong (School of Materials Science and Technology, Kunming University of Science and Technology, Kunming 650093 ） Abstract: this paper studies a kind of high -boron middle-carbon high-speed steel which contains 1.5%B and 0.40%~0.50%C, observes and analyzes its solidification structures and the main properties. The result shows that the solidification microstructure of high -boron high -speed steel consists of pearlite and little ferrite matrix, carbon boride and Fe B type eutectic. Fe B typ e eutectic and carbon boride distribute along grain boundary in a network form. Incre asing B 2 2 content would increase eutectic and the volume fraction of hard phase obviously, and improve hardness with fall of toughness. When the hardness of high-boron high -speed steel is at the same level with the ordinary high -speed steel, the production cost of high-speed steel will be reduced sharply, so high -boron high -speed steel can be used as a new type of wear-resistance material for roller. Key words: roller; high -boron high-speed steel; eutectic; carbon boride 0引言 轧钢技术的进步，包括对更高轧制效果、轧材质量和更低轧制成本的不懈追求，使轧辊制造技 术也在发生飞跃性发展。20世 80年代末，日本首先开发了高速钢