The numerical simulation of temperature field and shrinkage defect prediction for a valve casting, which was involved in 4 kinds of casting proces.
对采用4种不同铸造工艺方案的阀体铸件凝固过程进行了数值模拟及缺陷预测，获得了与试验相一致的模拟结果。
Aiming to the manufacturing of the automobile glass checking tools, the casting technology and the porosity defect of the checking tools were researched in this paper.
本文针对复杂铝合金玻璃检具毛坯的设计和制造，对其铸造工艺、合金成分、缺陷展开了研究。
In this paper the gas gap in the expendable pattern casting process was studied and the relation between the gas gap and collapse defect is discussed.
对消失模铸造铸铁件流动前沿的气隙进行了研究，探讨了气隙与坍塌缺陷的相互关系。
In this thee, the e-valuation for main casting materials available now is put forward and the defect of usual casting materials available now are analyzed.
对现有的主要铸造粘结剂进行了评价，分析了现有常用铸造粘结剂存在的缺陷。
The main task of this paper is to develop prediction & analysis system of shrinkage cavity and porosity defect in a casting for foundry engineering application.
本论文以有限元分析软件为开发平台，运用设计参数化和功能模块化技术，初步开发了面向铸造工程应用的铸件缩孔缩松预测及缺陷分析系统。
Defect analysis in cylinder sleeve with high performance by centrifugal casting in metallic mold is made. Measure to technological improvement and effect obtained are introduced.
对金属型离心铸造高性能气缸套的缺陷进行了分析，介绍了工艺改进措施及取得的效果。
Abstract: in this paper the gas gap in the expendable pattern casting process was studied and the relation between the gas gap and collapse defect is discussed.
文摘：对消失模铸造铸铁件流动前沿的气隙进行了研究，探讨了气隙与坍塌缺陷的相互关系。
A general problem in protecting the casting ingots by using expanded complex mould casting mold powder is the surface defect that slag deposition can be evolved easily in ingots head.
使用膨胀型复合模铸保护渣保护浇注钢锭，普遍存在的一个问题是容易使钢锭产生头部积渣这一表面缺陷。
It was indicated that the linear defect appeared after machining is not crack, it is the appearance of oxide film involved in the casting under the effect of external force.
结果表明，这种加工后出现的线性缺陷并非裂纹，而是卷入铸件的氧化膜受外力作用后在叶片表面的显现。
Influence of the initial temperature fields and mold hardness on the shrinkage defect of ductile iron casting by EPC process was mainly investigated in this paper.
本文主要讨论了初始温度场和铸型硬度对消失模铸造球墨铸铁件收缩缺陷的影响。
It is found that the surface defect like black stripes appeared in certain surface regions of die-casting wheel hub AM60B magnesium alloy after acid pickling in the anti-corrosion treatment.
在对AM 60 B镁合金轮毂压铸件进行表面耐蚀处理时，发现在前处理酸洗后，表面某些区域会产生黑色条纹状缺陷。
The mass defect that often appears in continuous casting process, the relative solution and key technique are also systematically discussed.
并针对连铸过程中易出现的质量缺陷、解决办法和连铸关键技术作了系统讨论。
Advantages: it can destroy the ingot casting, steel grain refinement, and eliminating the defect in microstructure, thus making steel tissue close-grained, with improved mechanical properties.
优点：可以破坏钢锭的铸造组织，细化钢材的晶粒，并消除显微组织的缺陷，从而使钢材组织密实，力学性能得到改善。
The white spot defect is an abnormal structure generally found in large cast iron cylinder sleeve by centrifugal casting.
白斑是离心铸造厚壁铸铁缸套的一种异常组织。
The most common blister defects in zinc alloy die casting were described. The reason for the defect formation was analyzed and an approach to defect decrease was offered.
介绍了锌合金压铸件中最常见的起泡缺陷，分析了起泡产生的原因，提出了解决问题的办法。
The results show that the partial unmelted region, casting defect structure and secondary crack form in the welding seam, which result in the low stress breakage of the samples.
结果表明：在焊缝区域内存在着局部未熔区以及铸造疏松组织和二次裂纹等缺陷，这是导致试样低应力断裂的根本原因。
The results show that the partial unmelted region, casting defect structure and secondary crack form in the welding seam, which result in the low stress breakage of the samples.
结果表明：在焊缝区域内存在着局部未熔区以及铸造疏松组织和二次裂纹等缺陷，这是导致试样低应力断裂的根本原因。
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