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采用化学成分和显微组织分析、室温和高温拉伸、硬度、冲击以及韧脆转变温度测试等方法,研究了30Cr2Ni4MoV钢低压转子不同位置的组织和力学性能.结果表明:低压转子不同位置的成分偏析较小,晶粒尺寸变化不大,拉伸强度和硬度比较均匀,但室温冲击性能、上平台能量和韧脆转变温度有所差别;与芯部相比,低压转子表面的室温冲击吸收能量和上平台能量高,韧脆转变温度低.
The microstructure and mechanical properties of low-pressure rotors in 30Cr2Ni4MoV steel were studied by means of chemical composition and microstructure analysis, tensile strength at room temperature and high temperature, hardness, impact and ductile-brittle transition temperature. The results show that the composition of low-pressure rotor at different positions Less segregation, little change in grain size, more uniform tensile strength and hardness, but at room temperature impact performance, the energy of the upper platform and ductile-brittle transition temperature are different; compared with the core, the low-pressure rotor surface at room temperature impact energy absorption And high energy on the platform, ductile and brittle transition temperature is low.