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熔模铸件脉纹缺陷分析
Analysis and Research on Vein Defect of Investment Casting
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- DOI:
- 作者:
- 朱伟杰 潘玉洪
ZHU Weijie;PAN Yuhong
- 作者单位:
- 无锡市雪浪合金钢铸造厂 无锡市凯斯特铸业有限公司
Wuxi Xuelang Alloy Steel Foundry,Wuxi 214161,China;Wuxi Kaisite Casting Industry Co.,Ltd.,Wuxi 214161, China
- 关键词:
- 熔模铸件 脉纹缺陷 改进措施
investment casting veining defect improvement measures
- 摘要:
- 脉纹是熔模铸件常见的缺陷之一。分析了正脉纹和反脉纹的缺陷特征及产生的主要原因。正脉纹的主要原因,一是型壳的内表面层有细的纤维网状或稍粗点的脉络状缝隙;二是金属液浇注速度过快或静压力头过高而产生的。反脉纹的主要原因是型壳内表面层有分层,浇注时在金属液的作用下,产生了细的纤维网状或稍粗点的脉络状的鼓胀,而产生了反脉纹。在此基础上,提出了相应的改进措施,并分析了"正脉纹"与"毛翅"以及"反脉纹"与"鼠尾"的联系和区别。Veins were one of the common defects of investment casting. The defects of positive and negative veins and their main causes were analyzed. The main reason for the positive veins is that the inner surface layer of the shell has a fine fiber network or a slightly coarser vein-like gap;The second is the metal liquid pouring speed is too fast or the static pressure head is too high. The main reason for the reverse vein pattern is that the surface layer inside the shell is stratified.Under the action of the metal liquid during pouring, a fine fiber network or slightly coarser vein-like swelling is generated,and the reverse vein pattern is generated. On this basis, the corresponding improvement measures are put forward, and the relationship and difference between "positive vein pattern" and "hairy wing" and "reverse vein pattern" and "rat tail" are analyzed.