CAJ | 학술논문

高锰钢前导轮内腔结构复杂，需要合理的铸造工艺以避免其内部产生铸造缺陷。为此，采用商业软件ProCAST对导轮轴孔处设一个明冒口的单冒口工艺（SR）和两个明冒口的双冒口工艺（DR）进行缺陷预测。计算发现，单冒口工艺（SR）的缺陷形成倾向低于双冒口的工艺（DR）。进而，通过调整单冒口工艺（SR）的冷铁形状、位置及增大轮缘处暗冒口体积，提出优化工艺M1；在M1基础上，通过减小轴孔处明冒口体积，并加大该处冒口保温砖厚度，提出优化工艺M2。模拟计算表明，采用M1和M2工艺均可消除导轮轮缘处的缩孔缩松缺陷；以M2的热裂倾向最小，热裂纹主要出现在前导轮内腔垂直拐角处和轴孔附近。
고맹강전도륜내강결구복잡，수요합리적주조공예이피면기내부산생주조결함。위차，채용상업연건ProCAST대도륜축공처설일개명모구적단모구공예（SR）화량개명모구적쌍모구공예（DR）진행결함예측。계산발현，단모구공예（SR）적결함형성경향저우쌍모구적공예（DR）。진이，통과조정단모구공예（SR）적랭철형상、위치급증대륜연처암모구체적，제출우화공예M1；재M1기출상，통과감소축공처명모구체적，병가대해처모구보온전후도，제출우화공예M2。모의계산표명，채용M1화M2공예균가소제도륜륜연처적축공축송결함；이M2적열렬경향최소，열렬문주요출현재전도륜내강수직괴각처화축공부근。
Casting process for high manganese steel front jockey wheel which has complicated inner chambers, shall be designed in reason to prevent casting defects in the chambers. Therefore, the casting processes, called SR (single riser) on one open riser and DR ( double riser) on two open risers on axle hole of front jockey wheel are simulated with casting software ProCAST in order to survey the defects. The simulation results indicate the defect-forming tendency of SR is lower than that of DR. Hence, basing on SR, a modified process, named M1 is proposed by adjusting the size and location of iron chills and increasing volume of blind riser around the wheel rim. Basing on M1, a further modified process named M2 is proposed by decreasing volume of open riser and increasing the wall thickness of insulating brick around the riser. The simulation shows both M1 and M2 can eliminate shrinkage porosities in front jockey wheel rim;in which M2 has the lowest heat cracking tendency. Heat cracks mainly appear at corner points in inner chambers and around axle hole of front jockey wheel.