Ningbo Ningshing Precision Machinery Group Co., Ltd.Who We AreNo.25 Hongxiang Rd A area Industry, Hongtang Jiangbei, Ningbo, 315033, Zhejiang Province, ChinaFormerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., we are a holding subsidiary of Ningbo Ningshing Holdings Corporation.
After years of development, we have successfully realized the transformation of "industry supply chain ecosystem" from only trading to integrated operation, including distribution and retail, precision processing, intelligent manufacturing, vacuum heat treatment, technical services and international trade, etc.
As one of the largest special steel distribution enterprises in China with imported and homemade tool steel materials, Ningshing P
The size of the metal grain (or grain size) has a decisive effect on its mechanical properties at room temperature and high temperatures, and the refinement of grain size is also one of the most important enhanced pathways in heat treatment of steel. Therefore, in metal performance analysis, the estimation of grain size is very important.
The grain size represents the scale of the grain size. Metal grain size has a great influence on many properties of metals. The effect of grain size is the effect of the grain boundary area. The worse the grain, the greater the grain boundary area, the greater the effects of performance. For the normal temperature performance of the metal, the smaller the grain is small, the higher the strength and hardness, the better the plasticity and toughness.