Improper forging process will also appear large grain or uneven, hardening crack phenomenon, forging cost is higher than the casting flange.
锻造工艺不当也会出现晶粒大或不均，硬化裂纹现象，锻造成本高于铸造法兰。
The casting is usually a fine grain casting with a very fine-grained outer diameter, which is resistant to atmospheric corrosion, a typical situation with pipes.
这种铸件通常为外径处晶粒非常细小的细晶粒铸件，能耐大气腐蚀，典型的情况是管子。
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。
Simulation results show that grain size is smaller for metal mold casting, but larger for sand mold casting, which is in good agreement with the experimental results.
模拟结果表明，金属型铸造晶粒尺寸较小，砂型铸造的较大。模拟结果与金相观察结果相符。
Forming method of fine grain, processing parameters of casting fine grain blade, and grain size scale of K418 alloy were investigated. The principle of forming fine grain was discussed.
研究了K418合金细晶形成的方法，细晶叶片的铸造工艺参数及其获得的晶粒度等级，并讨论了细晶形成的原理。
The recombination activity of grain boundaries (GBs) in casting multicrystalline silicon (mc-Si) was investigated through an electron beam induced current (EBIC) technique.
本文利用电子束诱生电流（EBIC）对铸造多晶硅中晶界的复合特性进行了研究。
The result shows that the technology of semi-solid strip casting and rolling can improve plastic processing property and refine grain.
结果表明，半固态连续铸轧技术可以提高板带的塑性加工性能，细化晶粒。
The casting process of fine grain K418 superalloy blades has been investigated in this paper.
研究了K418高温合金细晶叶片铸造工艺。
The tensile properti. es of K418 cast alloys by fine grain casting process and coventionally cast process have been determined at different temperatures.
测试了不同温度下细晶铸造和普通铸造K418合金的拉伸性能。
The results show that the grain is fined, the morphology of reticulation carbides is improved, the hardness and wear resistance of casting high speed steels are also enhanced by modifying treatment.
研究了热处理工艺对铸态和变质处理铸造高速钢组织与性能的影响。
Steel grain-reinforced pure copper cast composite was gotten successfully by suspension casting process and controlling the cooling rate.
采用悬浮浇铸工艺并控制冷却速度成功地得到了钢颗粒增强纯铜基铸造复合材料。
In this paper, a overview of the refractory grain distribution effects on the property of casting coating was given, the characteristic of the method for testing grain distribution was summarized.
本文概述了涂料耐火骨料颗粒级配对涂料性能的影响，总结了目前颗粒级配方法的特点。
The results show that main cause of conchoidal fracture forming is that composition segregation in solidification grain boundary of casting steel reduces the resistance of crack propagation.
结果表明，沿一次晶晶界的成分偏析对裂纹扩展阻力的降低作用是铸钢中贝壳状断口形成的主要原因。
Based on the potential advantages of producing grain oriented silicon steel by thin slab casting and rolling process, the key technical difficulties to be solved are brought forward.
在总结薄板坯连铸连轧生产取向硅钢技术优势的基础上，提出了该流程研究需要解决的技术难点。
In order to improve the cold fatigue, hot fatigue and mechanical fatigue resisting performance of the moving blade, grain refinement is required for the casting surface.
为了提高动叶片的抗冷热疲劳和抗机械疲劳的性能，铸件表面需进行晶粒细化。
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 eutectic played a role in inhibiting grain growth during casting.
这类共晶组织在合金的铸造过程中起抑制晶粒长大的作用。
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。
The results show that oxide inclusion in grain boundary and structure defects from casting and forging process are the main reasons for failure of the copper sleeve.
结果表明：晶界氧化夹杂和铸造、锻造造成的组织缺陷是引起结晶器铜套快速失效的主要原因。
The results show that casting after ultrasonic treatment can obtain finer grain with homogeneous microstructure and higher strength meanwhile acquire strongly improved plasticity of the alloy.
研究结果表明：超声波在熔体中产生空化作用，对7055铝合金熔体作超声处理能细化晶粒，提高强度，并能大幅度提高其塑性。
There have a lot of dendritic carbonitrides in the grain boundaries when the casting slab steel cooling down to the room temperature.
冷却至室温的铸坯晶界上存在大量的枝晶状析出物。
There have a lot of dendritic carbonitrides in the grain boundaries when the casting slab steel cooling down to the room temperature.
冷却至室温的铸坯晶界上存在大量的枝晶状析出物。
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