多元低合金贝氏体铸钢的研究和应用

以Si、Mn、Cr为主要合金元素,加入少量Mo、V、Ti、B及稀土进行微合金化和变质处理,在空冷淬火条件下,获得了综合性能优良的贝氏体组织。本文主要介绍了多元低合金空冷贝氏体铸钢的成分、组织和性能,这种材料具有优良的强韧性和耐磨性,用于制造破碎矿石的颚板和研磨矿粉的磨机衬板,使用寿命比高锰钢提高1.5～2.5倍,用于制造球磨机磨球,磨耗比普通锻钢球和低铬铸铁球低50%～80%,和高铬铸铁球相当;用于制造铁矿粉输送管道,寿命比16Mn钢提高3～4倍。多元低合金空冷贝氏体铸钢生产工艺简单,贵重合金元素加入量少,生产成本低,应用于矿山行业,可明显提高破磨设备运转率,降低矿粉加工成本。

STUDY AND APPLICATION OF MULTI-ELEMENT LOW ALLOY BAINITIC CAST STEEL

Low alloy bainitic cast steel containing suitable Si,Mn and Cr and trace amount of Mo,V,Ti,B and rare earth(RE)has high hardness and toughness in air quenching.In this paper,the composition,structure and properties of the multi-element low alloy bainitic cast steel is introduced.This steel has high strength,toughness and wear resistance.As compared with high manganese steel,the service life of jaw crusher′s plate and ball mill′s liner made from this steel is increased by 1.5～2.5 times.The wear amount of low alloy bainitic cast steel ball is 50～80% lower than that of common forging steel ball and low Chromium cast iron ball,equal to that of high Chromium cast iron ball.While using this steel for the pipe transporting powdered ore,the service life of the pipe is increase by 3～4 times as compared with 16Mn.The multi-element low alloy bainitic cast steel has a simple production process,less addition of valuable alloy and low production cost.When using in mining industry,the productivities of crusher and mill can be evidently improved with a low cost of ore processing.