The grain size grade is about 4-5 class, and that during the thickness the central is less half a class than the lateral.
薄板坯的晶粒度的大致范围在4～5级，其中在厚度方向上薄板坯中心部位晶粒度比侧部小半个等级。
The strength and toughness of super fine grain steels are greatly increased because of its micrometer or sub micrometer grade grain size.
超细晶粒钢依靠生成微米级或亚微米级的铁素体，使钢的强度和韧性大大提高。
To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60% is needed.
当铸志晶粒度力4 ~ 5级寸，破碎晶炭化物组织需要有60%以上的拉应变。
In this paper, the chemical contents, microstructure, inclusion, grain size and fracture analysis of the second grade gas turbine blade were investigated.
对燃气轮机二级动叶片失效件进行了化学成分分析、金相组织观察、晶粒度测定、夹杂物检查及断口分析。
There are usually three main features about the pilot plant test sample:large mass and large grain size of samples, difficulty to control the sample grade.
半工业选矿试样一般有三大特点：质量大、矿岩石样粒度大及控制送样品位难度大。
CVN(Charpy V-notch) toughness and grain size number of J55 grade oil casings produced by Baotou Iron and Steel Company did not meet the reiative standards in the past.
本文针对包钢原来生产的J55石油套管冲击韧性不足，晶粒粗大的问题开展研究。
The grain size of steel is grade of 8 and it attributes to fine grain steel. The grain size and grain uniformity are greatly improved as well.
晶粒度达到8级，属于细晶粒钢，其晶粒度和晶粒均匀性都大大提高。
The results show that adding medium carbon nucleating agents into high carbon steel grade can effectively enlarge equiaxed grain zone and fine grain size;
研究结果表明，向钢液中加入形核剂可有效地扩大等轴晶区。
The results show that adding medium carbon nucleating agents into high carbon steel grade can effectively enlarge equiaxed grain zone and fine grain size;
研究结果表明，向钢液中加入形核剂可有效地扩大等轴晶区。
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