半固态过共晶高铬铸铁部分重熔保温过程中的组织演变

Microstructure Evolution in the Semi-Solid Hypereutectic High Cr Cast Iron at Partial Re-Melting Temperature

研究了半固态过共晶高铬铸铁坯料部分重熔保温过程中初生碳化物的演变规律。结果表明,在1 300℃保温过程中,初生碳化物演变经历了细化和球化、长大、溶解三个阶段。其中第一阶段末,能够得到均匀、细小、圆整的理想初生碳化物组织。

Primary carbide microstructure evolution in the semi-solid hypereutectic high Cr cast iron has been studied at partial remelting temperature. The results showed that the morphology evolution of primary carbide experienced three stages as following： primary carbide spheroidizing and refining, growing, dissolving at the holding temperature of 1 300 ℃. The fine, equiaxed and homogeneous carbides could be obtained at the end of the first holdinq stage.