摘要
总结我国冷镦钢生产的现状:钢中碳含量按中下限控制,适量增加锰元素可改善钢中碳的存在形态和分布,有利于提高钢的冷成型性;在模铸开坯时切净料头、料尾,经反转修磨后通过磁探伤检测,保证钢坯轧制前的表面质量;采用单线多通道柔性切换技术,实现了750℃低温轧制;基体组织是铁素体加珠光体,距钢表面2mm以内的夹杂物尺寸不大于0.15μm,保证冷镦钢组织致密,无内部缺陷。对于冷镦钢的发展,重点提出:推动节约型免退火和非调质的新钢种及新技术、新工艺,提高冷镦用原材料的加工水平;通过提高硼钢中的V含量,同时降低P,S和C含量,改善硼钢的综合力学性能;进一步研究开发超细晶粒钢。
To summarize the present situation of cold-heading steel production in China. The carbon content in steel is controlled to the middle or lower limit. Proper manganese can improve the carbon existent form and distribution in steel. It is favorable to improve cold forming of steel. When mold casting bloom rolls, remnant is cut. Through magnetic testing after grinding and repairing, the surface quality of billet roiling is guaranteed. By adopting single wire multi-channel flexible switching technology, 750 ~C low temperature rolling is realized. Basic structure is ferrous plus pearlite. The size of inclusions within 2 mm from steel surface is no bigger than 0. 15 micron. The compact and fine microstructure of cold-heading steel and no inner defects are guaranteed. For the development of cold-heading steel, it is pointed out that to promote energy-saving non-annealed and non-quenched and tempered new steel and new technology, new process, to enhance production level of raw material for cold-heading steel, to improve the comprehensive mechanical properties through heighten the vanadium content of boron steel and lower phosphorus, sulfur and carbon content, ultra-fine grain steel is researched and developed.
出处
《金属制品》
2009年第2期43-47,共5页
Metal Products
关键词
冷镦钢
生产工艺
质量控制
非调质钢
硼钢
超细晶粒钢
冷镦钢发展
cold-heading steel
production process
quality control
non-quenched and tempered steel
boron steel
ultrafine grain steel
cold-heading steel development
