K15气缸体组芯立浇工艺及质量提高  

Cores Assembly-Vertical Pouring Process of K15 Cylinder Block and Its Quality Improvemen

作　　者：李善付 邢继伦 孙晓刚 

机构地区：[1]山东华源莱动内燃机有限公司,山东莱阳265200

出　　处：《现代铸铁》2015年第2期37-40,共4页Modern Cast Iron

摘　　要：介绍了K15气缸体结构及技术要求，阐述了生产K15气缸体所采用的铸造工艺：采用整体组芯、立式浇注工艺，底注、半封闭式浇注系统，浇口比为1：O．47：O．69，内浇道、横浇道、直浇道的截面面积分别为1650mm^2；782mm^2、1133mm^2，采用煤粉湿型砂造型。分析了铸件顶面气孔的产生原因，并通过采取以下措施使该缺陷得以减少：采用高强度树脂，减少树脂加入量，将砂芯发气量由原来的14-14．6mL／g降为12．9-13．5mL／g；优化水套芯砂，改善砂芯排气条件；增加和扩大砂型和砂芯排气孔和排气道；用耐火泥防止铁液进入排气孔，并将浇注温度严格控制在1410-1440℃。Configuration and technical requirements of K15 model cylinder block were introduced. The casting method and process used for K15 cylinder block was described as follows:using whole core assembly molding,using vertical pouring process,bottom gating-enlarged runner system with gating ratio of 1:0.47:0.69,the section area of ingates,runner bar and sprue of 1 650mm2,782 mm2,1 133 mm2;using coal dust green sand for molding. The reason causing blowhole defect on top surface of the casting was analyzed,and by adopting following measures,the blowhole defect has been reduced:using high strength resin to reduce resin addition and thereby reduced the gas evolution from former 14~14.6 m L/g to 12.9~13.5 m L/g;optimizing core sand of jacket core to improve core venting conditions;increasing and enlarging venting holes and venting canals;using fireclay to avoid iron melt entering venting holes;and strictly controlling pouring temperature in the range of 1 410~1 440 ℃.

关 键 词：气缸体 组芯立浇工艺 侵入性气孔 发气量 

分 类 号：TG251[金属学及工艺—铸造]