None of these castings have shrinkage defects.
这些铸件都没有缩孔缺陷。
The shrinkage defects include primary piping, secondary piping, and centreline shrinkage.
收缩缺陷包括敞开性缩孔、二次缩孔以及轴线缩孔。
With a wheel hub casting as example, the measures to prevent shrinkage defects were proposed.
以轮毅铸件为例提出了防止缩孔缩松缺陷的工艺措施。
The simulation shows that the shrinkage defects forms at the thick shell and the joint of the shell.
模拟结果表明，在铸件的厚大处和壁与壁的交接处产生了缩孔、缩松缺陷。
A conception of "frequency factor" is suggested for improving the accuracy to forecast the shrinkage defects.
为提高预测铸件凝固收缩缺陷的准确度，提出了频率因子的概念。
The solidification process of a driving wheel hub cast with former foundry method was simulated to find out the reason causing shrinkage defects.
对驱动轮轮毂原铸造工艺进行凝固模拟，找出缺陷的成因，并对原工艺进行了改进，采用顶置随形压边浇冒口。
The initial simulation indicated that the shrinkage defects formed at the boss sections and the section near the connection of multi-diameter shaft.
初次模拟显示，在阶梯轴的凸台处与其临近连接的阶梯轴段会产生缩孔、缩松缺陷。
Manual molding had been used for the nodular iron front wheel boss and differential mechanism case, and chills were used to prevent shrinkage defects.
球铁前轮毂和差速器原采用手工造型，用外冷铁解决缩孔缺陷。
Temperature fields were simulated by numerical simulation technology and the shrinkage defects were predicted, which supplied direction for establishment of casting process.
应用数值模拟技术模拟了活动横梁的温度场，并对缩孔疏松缺陷进行了预报，为工艺方案的确定提供指导。
Based on calculated temperature distribution in the casting, the prediction of shrinkage defects can be achieved, which can be used as a tool to optimize the design of foundry technology.
基于温度场分析结果的铸件缩孔缩松预测可以优化铸造工艺设计。
The results are very important to understand the solidification characters of steel castings with T conjunction and to estimate the position of the hot-spot in the castings to avoid shrinkage defects.
得到有益于认识铸件中此类接头凝固特性和热节位置的变化规律，对工艺设计者认识和防止成型过程中产生凝固收缩缺陷是很必要的。
Is mainly the size effect and solidification, shrinkage, stress and other issues clearly, to avoid or reduce the segregation, iron manhole cover deformation and crack defects.
主要是明显的尺寸效应和凝固、收缩、应力等问题，避免或减少铸铁井盖的成分偏析、变形、开裂等缺陷的产生。
Ingot defects may be broadly classified into internal flaws and surface flaws. Internal flaws are caused by shrinkage.
钢锭缺陷广义上可分为内部缺陷和表面缺陷。内部缺陷是因收缩引起的。
Large thick-section ductile Iron housing easily produces casting defects such as shrinkage cavity, shrinkage porosity, graphite floating and spheroidizing decay.
大型厚断面球墨铸铁件在铸造过程中极易产生缩孔、缩松、石墨漂浮及球化衰退等铸造缺陷。
The common defects of the housing casting include cracks, sand drop, slag inclusion, shrinkage porosity and rough grain, etc.
机架的常见缺陷有裂纹、掉砂、夹渣、缩孔缩松和晶粒粗大等。
The shrinkage cavity, depression, shrinkage porosity, scab and swell defects often took place with the heavy plate castings produced by adopting traditional foundry method.
厚实板类铸件按传统工艺生产，容易产生缩孔、缩凹、缩松、夹砂、胀包等铸造缺陷。
The casting defects in the railway frog were mainly the nonmetal inclusions and the shrinkage.
辙叉内部的铸造缺陷主要是沿晶界析出的非金属夹杂物和缩松。
Aiming at these defects, a kind of special mortar for plastering aerated concrete with good workability, good water retention, high bonding strength and low shrinkage ratio has been prepared.
针对这些缺陷，研制了一种和易性好、保水性好、粘结强度高、收缩率低，适合加气混凝土抹灰用的砂浆。
It is liable to produce various casting defects, such as coarse grain, shrinkage cavity, shrinkage porosity, hot tearing, microstructure segregation and solute segregation.
在铸造过程中容易产生各种铸造缺陷，如晶粒粗大、缩孔缩松、开裂、组织和成份偏析等。
Using self-feeding in solidification can make good surface quality, no shrinkage casting defects of castings; the technology product yield of the casting greatly increases.
利用凝固过程自补缩，可使铸件表面质量好，无缩孔、缩松等铸造缺陷，工艺出品率大大提高。
The results indicate that the casting defects are mainly shrinkage porosity and cracks caused by solidification shrink, which mainly presents in the hot spot between the spoke and the rim.
研究表明：轮毂的工艺缺陷主要为缩孔、缩松以及凝固过程中收缩导致的裂纹缺陷，主要分布在轮辋、辐条交汇的热节部位。
The results indicate that the casting defects are mainly shrinkage porosity and cracks caused by solidification shrink, which mainly presents in the hot spot between the spoke and the rim.
研究表明：轮毂的工艺缺陷主要为缩孔、缩松以及凝固过程中收缩导致的裂纹缺陷，主要分布在轮辋、辐条交汇的热节部位。
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