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研究了热轧及热轧后立即等温退火的控制轧制工艺对喷射成形超高碳钢的组织及室温力学性能的影响,分析了超高碳钢不同组织结构与其力学性能之间的关系。结果表明,采用热轧后立即进行等温退火的控制轧制工艺,可得到层片珠光体与碳化物颗粒的有序混合组织,大大提高了喷射成形超高碳钢的室温综合力学性能,且工艺相对简单;同时采用热轧处理后,产生的片层状珠光体组织能够有效提高超高碳的加工硬化率,进一步通过减小片间距,可以获得更高的强度。
The effects of controlled rolling process after hot rolling and hot isothermal annealing on the microstructure and room temperature mechanical properties of spray-formed ultrahigh-carbon steel were studied. The relationship between different microstructures and mechanical properties of ultra-high carbon steel was analyzed. The results show that the controlled rolling process of isothermal annealing immediately after hot rolling can obtain the ordered mixed microstructure of lamellar pearlite and carbide particles and greatly improve the room temperature mechanical properties of spray-formed ultra-high carbon steel. Relatively simple; while using hot-rolled treatment, the resulting lamellar pearlite organization can effectively improve the work hardening rate of ultra-high carbon, further by reducing the chip spacing, you can get higher strength.