针对1300缸体铸件气孔缺陷问题,在分析缸体铸件结构特点和原铸造工艺的基础上,探究了缸体铸件气孔缺陷产生的原因,优化了浇注系统方案.采用中注式浇注系统、卧浇、一箱两件的工艺方案,电炉出铁温度为1450~1480℃,控制浇注温度在1420~1440℃,浇注时间缩短为27~29 s.优化后铸件气孔缺陷明显减少.%Aiming at the casting blowhole defects of 1300 cylinder block, based on analysis of the structure of cylinder block castings and the original casting process, the causes ofthe blowholes defects were studied, and the gating system was optimized. The process scheme of parting-line gating system, horizontal casting, and two pieces per mold box was adopted. The tapping temperature was 1450-1480 ℃ , pouring temperature was 1420-1440 ℃, and the pouring time was shorten to 27-29 s. The blowholes defects were obviously decreased by using the optimized casting process.
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