汽车制动盘渣气孔缺陷成因及工艺改进  

Causes and Process Improvement for Slag Blowhole Defect in Auto Brake Disc Castings

作　　者：吴兴远 梁鹏飞 周技 范金辉[2] WU Xing-yuan;LIANG Peng-fei;ZHOU Ji;FAN Jin-hui(Guangde Asia-Pacific Automotive Intelligent Braking System Co.,Ltd.,Guangde 242234,Anhui,China;College of Mechanical Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]广德亚太汽车智能制动系统有限公司,安徽广德242234 [2]东华大学机械工程学院,上海201620

出　　处：《铸造》2018年第9期849-852,共4页Foundry

摘　　要：通过扫描电镜和能谱分析,对制动盘孔洞类铸造缺陷处进行分析,发现缺陷处存在Al、 Ca、 Si、 Mn、 Ba等元素,确认其为渣气孔缺陷。利用鱼骨分析法对渣气孔缺陷成因进行分析,对铸铁孕育工艺和型砂混砂工艺加以改进,采取使用Ca、 Al元素含量较低的孕育剂进行孕育处理,以及减少型砂含泥量来降低型砂水分的措施,有效减少了制动盘的渣气孔缺陷。By scanning electron microscopy and energy spectrum analysis of hole defects in the brake disc castings, it was revealed that the elements such as A1, Ca, Si, Mn and Ba existed in these defects, and these defects were identified as slag blowhole. The fish bone analysis method was used to analyze the causes of slag blowhole defect. Then, the inoculation process was improved by using inoculants with low Ca and AI elements, and the sand mixing process was improved by reducing the mud content in the molding sand to cut down the molding sand moisture. Those measures effectively reduced the slag blowhole defect in the brake disc castings.

关 键 词：制动盘 孕育工艺 混砂工艺 渣气孔 

分 类 号：TG250.6[金属学及工艺—铸造]