棒材穿水冷却装置的基本原理是什么？

在精轧机后设有一个由数个水冷箱组成的可调水冷段，对棒材进行急剧冷却，使棒材表面形成马氏体组织，在随后的温度恢复过程中，芯部热量散出对表面马氏体组织可产生回火作用，结果棒材表面层为回火马氏体，芯部为细粒珠光体及索氏体组织。(2)reducethetwooxidationlossonthesurfaceoftheproduct。这种组织结构使棒材屈服极限和韧性提高，并具有良好的可焊性。

What is the basic principle of the bar water cooling device?

After the finishing mill, there is an adjustable water cooling section  of several water cooling boxes. The rod material is cooled sharply to form martensite structure. During the subsequent temperature recovery process, the heat of the core can produce tempering on the surface martensite, and the surface layer of the rod is tempered martensite, the core is fine pearlite and Soxhlet body. This structure improves the yield limit and toughness of bars, and has good solderability.

选择一批具有行业轧钢机设备技术制高点，能带动轧钢机设备行业和技术提高的建设项目作为行业技术***项目，组织力量研制***技术和关键软件，实现轧钢机设备自动化和计算机控制系统的国产化。

A batch of ctruction projects which have the technical height of the industry rolling mill equipment and the ctruction projects that can improve the equipment industry and technology of the rolling mill are selected as the demtration project of the industry technology, and the core technology and key software are developed to realize the localization of the automation of the rolling mill equipment and the computer system.

轧钢机的成长都是在品质有所保证的前提下所进行的，因为品质是轧钢机生存在市场中的旗帜，只有拥有良好的品质才能让自身的旗帜在市场中高高的飘荡。

The growth of the rolling mill is carried out under the premise of quality assurance, because the quality is the banner of the steel rolling machine in the market. Only with good quality can its flag float high in the market.