Cause Analysis and Improvement of Cracks in Rocker Arm Made of Steel Casting
摘 要
在对内燃机气门摇臂进行磁粉探伤时发现有裂纹存在。通过化学成分分析及金相检验分析了裂纹产生的原因。结果表明: 该裂纹为铸造过程的热裂纹; 通过加大模具过渡区的圆角及减小内浇口尺寸, 可消除铸件热裂纹的产生。
Abstract
By means of chemical composition analysis and metallographic examination, the reason of the cracks in rocker arm of engine valve during magnetic testing was analyzed. The results showed that the crack was hot tear during casting process. Changing the radius of transmission area of mould and reducing the size of ingate can prevent the recurrence of hot tear.
中图分类号 TG249.5
所属栏目 质量控制与失效分析
基金项目
收稿日期 2011/10/26
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备注孙银林(1973-), 男, 工程师, 学士。
引用该论文: SUN Yin-lin. Cause Analysis and Improvement of Cracks in Rocker Arm Made of Steel Casting[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2012, 48(9): 631~633
孙银林. 铸钢件摇臂裂纹原因分析及改进[J]. 理化检验-物理分册, 2012, 48(9): 631~633
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参考文献
【1】陈国桢,肖柯则,姜不居.铸件缺陷和对策手册[M].北京: 机械工业出版社, 2004.
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