CAJ | 학술논문

针对传统环件生产工序繁琐、材料和能源浪费较严重的现状，提出一种环形零件铸辗连续成形新生产工艺。根据理论分析、数值模拟与试验研究来确定生产工序中冶炼、浇注和运输工序中的温度参数：以42CrMo 合金钢为研究对象，利用JMatPro软件模拟出合金相图，依据凝固过程相变情况及工业生产实际制定冶炼温度，冶炼温度为1750℃；通过ProCAST软件对离心铸造过程进行模拟，分析铸造凝固过程中组织晶粒尺寸、温度变化及应力变化，确定浇注温度和出模温度，其中浇注温度为1520℃、出模温度为1050℃；运用高温热台试验研究动态组织晶粒变化过程，制定环件保温温度及保温时间，保温温度为1000℃，保温时间为180 min。模拟结果与工业生产相符合，且热台试验显微镜下观察，经保温处理的试样组织均匀细小，满足热辗扩晶粒条件要求。
침대전통배건생산공서번쇄、재료화능원낭비교엄중적현상，제출일충배형령건주전련속성형신생산공예。근거이론분석、수치모의여시험연구래학정생산공서중야련、요주화운수공서중적온도삼수：이42CrMo 합금강위연구대상，이용JMatPro연건모의출합금상도，의거응고과정상변정황급공업생산실제제정야련온도，야련온도위1750℃；통과ProCAST연건대리심주조과정진행모의，분석주조응고과정중조직정립척촌、온도변화급응력변화，학정요주온도화출모온도，기중요주온도위1520℃、출모온도위1050℃；운용고온열태시험연구동태조직정립변화과정，제정배건보온온도급보온시간，보온온도위1000℃，보온시간위180 min。모의결과여공업생산상부합，차열태시험현미경하관찰，경보온처리적시양조직균균세소，만족열전확정립조건요구。
Based on the complicated process, caused seriously waste of material and energy in traditional production process of rings, the objective of this study is to put forward a new type of ring production process, casting-rolling continuously forming of rings, as well as the temperature of each process through theoretical analysis, numerical simulation and experimental research. 42CrMo alloy steel is used as the material of the rings, the phase diagram of 42CrMo steel alloy is made through JMatPro software. According to the solidification process of phase change and industrial production practice to accurate formulate the smelting temperature and the smelting temperature is 1 750℃. The pouring temperature and the mold stripping temperature of centrifugal casting are simulated by the numerical simulation of microstructure and analysis on process of setting on ProCAST software, which concentrates on grain size, temperature and stress variation during casting, the pouring temperature is 1 520℃and the mold stripping temperature is 1 050℃. The hot stage experiment is employed to seek the change process of dynamic organization grain that accurate prediction the holding mold temperature and time, the temperature is 1 000 ℃ and the time is 180 min. The simulation result is consistent with industrial production, the hot stage microscope shows fine and homogeneous microstructure of the samples, meets the grain condition of hot rolling.