多元低合金耐磨钢破碎机衬板制造工艺研究

Research on Manufacturing Process for Complex Low-alloyed Wear-resisting Crusher Liner

破碎机在电力、建材、冶金和矿山工业中应用非常广泛。衬板是破碎机上承受载荷的关键零部件,其性能和使用寿命直接影响着破碎机工作效率和生产成本,因此要求衬板具有良好的力学性能、良好的冲击韧度和耐磨性。针对目前国内破碎机衬板耐磨性差和寿命低的状况,研制一种新型多元低合金耐磨钢破碎机衬板。根据破碎机生产工艺和破碎板的性能要求,设计衬板材料的化学成分、制定铸造工艺和热处理工艺,进行现场试制和试验研究。试验结果表明,这种低合金耐磨钢的洛氏硬度达到50 HRC以上,冲击韧度达到18 J/cm2以上,具有良好的力学性能和耐磨性。装机和工业试验证明,新型破碎机衬板使用寿命长,具有良好的经济效益和社会效益。

Crusher is widely used in electricity, building materials, metallurgy and mining industry. Crusher liner is the key component of crusher for bearing load. The operations efficiency and production cost of crusher are directly affected by the performance and service life of crusher liner. Therefore, crusher liner is required to have good mechanical properties, impact toughness and abrasive resistance. Aiming at the low wear resistance and short service life of commonly used crusher liner, a new type complex low-alloyed wear-resisting crusher liner is researched. According to the production process of crusher and the performance requirement of crusher liner, the chemical composition is devised. The casting process and heat treatment process are researched. Field trial manufacture and corresponding performance experimental investigation are performed. It is shown fi＇om the result of experiment that the Rockwell hardness of this complex low-alloyed wear-resisting steel is above 50 HRC and the impact toughness is above 18 J/cm2. So the liners have better mechanical performance and wear resistance. Production and industrial test shows that the service life of this new liner is much longer and the economic and social benefit is significant.