钒钛铸铁型钢轧辊

用钒钛生铁作原材料,在冲天炉中熔炼和采用稀土镁作球化剂,生产型钢轧辊是成功的,解剖φ930,φ1070大型型钢轧辊证明,其性能完全达到轧辊所要求的使用指标。钒钛铸铁轧辊在使用过程中未出现过断辊,剥落和掉肉等现象,在轧制90方钢坯时比不含钒钛的铸铁轧辊寿命提高一倍。     

在普通机床上加工成套型钢轧辊

介绍了在普通车床上加工成套型钢轧辊的工装设计、刀具选择及加工工艺。     

大中型型钢轧机用辊材质选择

由于中国型钢轧机轧辊选材较落后，普通低合金材质轧辊已不能满足高效钢材的需要。针对大中型型钢断面较复杂及轧机各机架轧辊应具备的主要性能不同，指出了粗轧机组、中轧机架、精轧机架轧辊在材质的选择上应考虑的因素，提出了各机架轧辊应选用的材质及硬度控制范围。     

型钢轧辊的再生利用

介绍型钢废轧辊的改制情况和使用效果。     

型钢轧辊冷却制度的改进

1 前言目前鞍钢乃至国内各大、中、小型轧机以及钢管等轧机的热轧工作辊的冷却都是采用一种落后的冷却方式,如在轧机上安装带孔的钢管或胶管对轧槽喷水。这种喷水方式使轧槽不能受到均匀冷却,因喷到轧槽上的水呈实心圆形,不能保证沿轧槽周边有均匀的温度场。这种情况易使轧槽内同一区域温差加大,使轧槽表面出现热应力,随之产生网纹和裂纹,进而造成轧槽表面成块脱落。短期内产生上述现象纯属冷却不均问题,严重影响产品表面质量。为了保证产品表面质量必须增加换辊时间,而影响轧机产量,因此从1960年开始,美国、前苏联等国家都进行新型     

轧机轧辊材质改进

本文在对φ260轧机轧辊材质，硬度等方面分析的基础上，选择了符合现场要求的轧辊，降低了轧辊消耗，提高了轧制产量，带来了显著的经济效益。     

热轧轧辊选材和材质研究的进展

对各类热轧轧辊的选材问题进行了分析，介绍了热轧轧辊材质研究与应用的新进展。     

谈型钢轧辊滚动轴承的润滑和密封

为改善型钢车间轧辊滚动轴承的润滑条件 ,莱钢锻压厂设计了轧辊轴承清洗装置 ,对离线轴承进行清洗检查 ;同时改进轴承的密封结构 ,提高了轴承的使用寿命 ,降低了轴承的烧损 ,提高了轧机的工作效率 ,降低了成本     

型钢轧辊冷却装置及其工艺研究

阐述了鞍钢中型厂型钢轧辊以及鞍钢焊管厂连续炉焊管机组轧辊。在生产状态中对其进行均匀冷却的研究结果。其内容包括以V型嘴为核心的冷却装置、冷却水量、冷却速度、冷却均匀性、减少和清除轧槽中网纹或裂纹等予以总结分析。实验证明:新型冷却装置和冷却工艺是可行的,有效的,可显著地提高轧辊使用寿命,对提高轧机产量和产品表面质量也是成功的。     

Longitudinal rolling in helicoid rollers

A new method of sheet rolling in helicoid rollers is considered. In this approach, the roller barrel is formed by a helicoid with rounded projecting tips. The effectiveness of the rollers is demonstrated, and their geometric parameters are determined. Depending on the mutual orientation of the rollers’ helical barrel surfaces, rolling will produce linear hardened zones on the strip, at some angle to its longitudinal symmetry axis. Such nonuniform deformation increases the strength of the sheet, thanks to the formation of local hardened zones, without overall loss of strip plasticity.     

Cold rolling with vibration of the working rollers

By means of DEFORM-2 software, cold rolling with vibration of the working rollers is simulated. It is found that self-oscillation significantly affects the fluctuation of the longitudinal stress in the metal and the rolling forces in adjacent stands of the continuous mill; and only slightly affects the longitudinal thickness variation of the strip. That leads to deviations in the surface profile.     

More efficient use of composite rollers in hot and cold rolling

A new design has been developed for composite rollers so as to eliminate azimuthal and axial displacement of the wrapper relative to the shaft, reduce the tensile stress in the wrapper, and increase roller life. Reliable attachment is ensured by a specially designed mechanical link between the shaft and wrapper. The proposed approach is expedient in the manufacture and repair of supporting rollers in hot- and cold-rolling mills, large working rollers for hot-rolling mills, rollers in roller conveyers and secondary cooling lines for continuous-casting machines. Wear-resistant wrappers significantly improve roller performance and also roller life in extreme situations.     

Cold rolling on textured rollers to obtain regulated surface roughness

At OAO MMK, a new production technology has been developed for cold-rolled steel sheet with regulated surface roughness, used in the auto industry. This technology relies on regulation of the tension in the cold-rolling mills, a special textured barrel surface of the working rollers, new roller profiles, and the use of a wetting liquid in the temper mill.     

四辊轧机工作辊辊系稳定性分析

文章主要讨论了工作辊辊系不稳定带来的危害，影响工作辊辊系稳定性的因素，工作辊辊系的力的分析以及如何优化选取偏移量e。     

蠕动控制在中板轧机延伸辊道上的应用

介绍韶钢中板轧机前后延伸辊道上利用PLC可编程控制器实现蠕动控制的方法．