摘要
目的:探讨镍铬合金铸造冠桥铸件缩孔与铸道设计的关系。方法:随机抽样选择251例技工室的铸造模型,采取三种不同的铸道安插方式。结果:不采用铸造补缩设计的铸件缩孔率很高为55％,而采用储金球加排气道补缩设计后缩孔率有所下降。结论:在镍铬合金铸造冠桥中其铸道适当增加储金球及排气道以降低缩孔率的发生。
Research of relationship of the sprue designing shrinkage cavity of Cr-Ni alloy cast crown bridge. Methods:The 251 molds,
selected in ration from shop, were maken by design of three gating ways. Results: The ratio of shrinkage cavity without feeding was high to 55 % , and ratio of others designed with store bead and vent feeding have descended. Conclusion: The ratio of shrinkage cavity can be descended by designs with store bead and vent feeding.
出处
《职业与健康》
CAS
1999年第4期45-45,共1页
Occupation and Health
