论文部分内容阅读
球墨铸铁在机器工业中的用途日趋广泛,近几年来国内外都把它作为一项极有前途的工程材料进行研究。它具有较好的物理机械性能。球墨铸铁的静力强度和耐磨性能不仅大大高于灰口铸铁、孕育铸铁、合金铸铁及可锻铸铁,且部分优于45号钢。同时比钢具有较好的吸振性,铸造性能方面也是良好的。以往在设计“跨径20米钢筋混凝土预制架支座”中,摆柱材料采用铸钢,上垫板及下垫板采用钢板焊成。改用球墨铸铁后,一般较铸钢便宜1/3,较锻钢便宜1/5～2/5。制浩球黑铸铁不像铸钢和锻纲那样需要炼钢设备和复
Nodular cast iron in the machine industry has become more and more widely used in recent years both at home and abroad as a very promising engineering materials research. It has better physical and mechanical properties. Ductile iron static strength and wear resistance is not only significantly higher than gray cast iron, nurtured cast iron, alloy cast iron and malleable iron, and some better than 45 steel. At the same time than steel has good vibration absorption, casting performance is also good. In the past in the design of “span 20 meters precast steel frame support”, the use of cast steel column material, the backing plate and the backing plate welded using steel. After using ductile iron, the general than the cast steel cheaper 1/3, 1/5 ~ 2/5 cheaper than the forged steel. Black ball ball system does not like the black cast steel and forgings need steel equipment and complex