金刚石锯片基体用50Mn2V钢的研发.pdfVIP

金刚石锯片基体用 50Mn2V 钢的研发 董中波 董汉雄 骆海贺 刘文斌1 （武钢研究院，武汉 430080 ） 摘 要 采用转炉冶炼—连铸—2250mm 热连轧机轧制生产出厚度为（3~12 ）mm ×（950~1550 ）mm 的金刚石锯 片基体用 50Mn2V （% ：≤0.55C、0.15~0.25Si、1.40~1.60Mn、≤0.015P、≤0.010S、≤0.16V、≤0.30Cr ）钢板。 通过铸坯缓冷来减少热裂纹的产生，通过控制精轧、卷取温度及适当的开平工艺来保证性能和板形。结果表明： 50Mn2V 钢实物性能稳定，组织均匀，板形控制合格。满足金刚石锯片基体用钢技术条件要求，应用情况良好。 关键词 50Mn2V 综合性能 组织 夹杂物 Research and Development of 50Mn2V Steel for Base of Diamond Saw Blade Dong Zhongbo Dong Hanxiong Luo Haihe Liu Wenbin (Research and Development Center of WISCO, Wuhan, 430080) Abstract A steel plate with thick between （3~12 ）mm× （950~1550 ）mm used as base of diamond saw blade which named 50Mn2V （% ：≤0.55C、0.15~0.25Si、1.40~1.60Mn、≤0.015P、≤0.010S、≤0.16V、≤0.30Cr ）was developed in process include converter melting ,continuous casting and 2250mm hot continuous rolling. Reduce the occurrence rate of hot crack through slow cooling of the slab and enhance mechanical properties and strip shape by accurate control of finish rolling temperature, coiling temperature and decoiling process. It was proved that the steel had uniform in structure and stable combination properties through complex mechanical test and structure measurement, besides the perfect shape controlling of plate. The steel just met the technology requirements of base of diamond saw blade and ideal results was got in application. Key words 50Mn2V, combination properties, structure, inclusion 1 引言 传统的锯片基体用钢大多是用电炉冶炼、浇注，然后经过粗轧、精轧成材。存在的主要问题是成材率、 效率都偏低，因此综合成本较高。50Mn2V 钢是最近研制出的新型金刚石锯片基体用钢，生产工艺流程大多 为转炉冶炼+热连轧。该钢碳含量较高，连铸过程容易产生热裂纹，铸坯冷速过大或者冷却不均匀，会导致 断坯的现象；同时由于钢板强度高，屈服强度达到 600MPa 级，对设备要求高，钢板板形不好控制，特别是 钢卷开平后板形控制较难。 武钢采用转炉冶炼+2250mm 热连轧工艺生