The new preparation method of Al-Ti-C grain refiner was studied with aluminium ingot,potassium hexafluorotitanate,aluminium powder,hexachloroethane and carbon powder.

提出了利用铝锭、氟钛酸钾、铝粉、六和碳粉制备铝钛碳晶粒细化剂的新方法。

A preparation method to reveal the grain boundrie of zirconium and zircaloy for metallographic and scanning electronic microscope analysis is introduced.

介绍了一种能清楚显示锆及锆合金晶粒的金相及扫电镜分析试样的制备技术。

What is obtained with the forging waste heat normalizing and controlled cooling technique is the coarse stable structure in a 20CrMnTi gear, but its cutability is good.

余热正和常规的正后，再经同样的工艺进行渗碳、淬和回，试验证明：其渗层和心部的组织、晶粒度及机械性能均相同。

The results show that the fine grain process of casting has some effects on the behavior of response to cyclic stress, such as the increase in rigidification exponential of fine grains.

实验表明，晶粒细化对循环应力响应有一定的影响，比如硬化指数的提高。同时疲劳过渡寿命降低。